US 2004816 A
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Description (OCR text may contain errors)
June 11, 1935.
B. J. LINDGREN METAL BARREL DRUM BEADING MACHINE Filed Dec. 2l, 1932 ll ShebS-Sheet l June 1l, 1935. B, J. |NDGREN METAL. BARREL DRUM BEADING MACHINE Filed Deo. 2l, 1932 ll Sheets-Sheet 2 was QQ Ine@ IAI QI B. J. LINDGREN l2,004,816
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METAL BARREL DRUM BEADING MACHINE Fmed Dec. 21, 1932 11 sheets-sheet 8 June 11, 1935.
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Patented June 11, 1935 METAL BARREL DRUM BEADING MACHINE Bror J. Lindgren, Buffalo, N. Y., assignor to Niagara. Machine and Tool Works, Buffalo, N. Y., a corporation of New York Application December 21, 1932, Serial No. 648,184
This invention relates to a machine for effecting preliminary expanding of circumferential beads on the intermediate parts of sheet metal barrel drums, bodies or shells preparatory to com- 5 pleting the formati-on of these beads by a rolling operation according to the process which is shown and described in Letters Patent on Method of beading a sheet metal shell, No. 1,908,521, dated May 9, 1933, and more particularly to an apparatus for conveying or propelling the sheet metal barrel drums or bodies successively to said expanding apparatus and said rolling apparatus, and discharging the same from the machine after the formation of the beads thereon has been completed.
It is the object of this invention to provide an improved propelling means for feeding the drums successively tothe expanding and rolling apparatus and discharging the drums from the latter after the beading operation has been completed, which are reliable and ecient in operation, and cause the drums to be propelled and beaded accurately and expeditiously.
In the accompanying drawings:
Figure 1 is a plan view showing the bead expanding and the conveyer or propelling mechanism embodying my invention, and also the bead rolling mechanism to which the drums are presented after the expanding of the beads thereon has been effected.
Figure 2 is a front elevation of the same, partly in section.
Figures 3 and 4 are elevations of the bead expanding mechanism and the adjacent parts of the drum conveying mechanism, viewed from the left and right hand ends of the expanding mechanism respectively.
Figure 5 is a vertical longitudinal section of the bead expanding mechanism, taken on line 5-5 Fig. 1.
Figure 6 is a horizontal section of the bead expandng mechanism, taken on line 6-6 Fig. 5.
Figure 7 is a vertical transverse section of the bead expanding mechanism, on an enlarged scale, together with the adjacent part of the drum conveyer mechanism, taken on line 1-1 Fig. 5.
Figures 8 and 9 are fragmentary vertical transverse sections taken on the correspondingly numbered lines in Fig. 5.
Figure 10 is a fragmentary longitudinal section, taken on line III- I Fig. 20.
Figure 11 is a fragmentary vertical transverse section, on an enlarged scale, taken on line I I-I I Fig. 5.
Figure 12 is a fragmentary vertical transverse section, taken on line I2-I2 Fig. 13, showing the drum resting on the saddle.
Figure 13 is a fragmentary vertical longitudinal section, taken on line I3-I3 Fig. 7, but showing parts of the mechanism omitted for the sake of clarity.
Figure 14 is a fragmentary vertical transverse section, taken on line l-M Fig. 13.
Figure l is a fragmentary vertical section, taken on line I5-l, Fig. 14, looking in the direction of the arrow associated with the numeral Figure 16 is a fragmentary vertical section taken on line It-i Fig. 14, looking in the direction of the arrow associated with the numeral I6.
Figure 17 is a diagrammatic chart showing the method of operation and adjustment of the mechanisrn whereby the barrel drums or bodies are raised and lowered relative to the axis of the expanding mechanism.
Figure 18 is a fragmentary side elevation of the mechanism whereby the barrel drums are raised and lowered relative to the axis of the expanding mechanism, this side elevation being taken when viewed from line iii-,I3 Fig. I4.
Fig. 19 is a fragmentary horizontal section taken on line l3-I9 Fig. 13.
Figure 20 is a fragmentary horizontal section taken on line 2li-20 Fig. 2.
Figure 21 is a fragmentary vertical section taken on line 2 l2l Fig. 20.
Figure 22 is a fragmentary vertical section taken on line 22-22 Fig. 2. 1
Figure 23 is a, fragmentary vertical section taken on line 23-23 Fig. 6.
Figure 24 is a fragmentary section taken on line 24-24 Fig. 2.'
Figure 25 is a fragmentary vertical section taken on line 25--25 Fig. 24.
Figure 26 is a fragmentary vertical longitudinal section, on an enlarged scale, taken on line 26-26 Fig. 4, and showing the telescopic portion of the piping whereby the pressure iiuid is supplied to the hydraulic motor on one of the expander supporting slides of the bead expanding mechanism.
Figures 27 and 28 are vertical sectionsA taken on the correspondingly numbered lines in Fig. 26.
Figure 29 is va top plan view showing diagrammatically the piping connecting the various hydraulic motors and the valve mechanism whereby the flow of the pressure iiuid relative to each of these motors is controlled. y
Figures 30, 31, 32, 33, 34, 35, 36 and4 37 a'rel diagrammatic views showing the flow of the J ferent positions of the pilot valves which control the now of the pressure huid toward and from the master valves of the several motors while .actuating different .parts of the drum conveyer,
lifter, slides and bead expanding mechanisms.
Figure 38 is a side elevation of the hydraulic pumpingy mechanism whereby the iluid pressure is maintained for operating the hydraulic motors whereby diiferent parts of the conveyer, lifter, slides and expanding mechanisms are actuated, this elevation being taken upon viewing the apparatus along line "-38 lllg. 1.
' Flgure 39 isafraamentaryverticalsection,
taken on line 3.--39 Fig. 38.
Figure 40 is a vertical section taken lengthwise of the conveyer mechanism and transversely of the expanding mechanism along line "-43 in Pig. 1, and showing vthe position which the conveyer mechanism occupies when beginning .a forward stroke for advancing the drums in multiple, and presenting them to the bead expanding and rolling mechanisms.`
Plgure41isasimilarviewtakenonlinelI-Ii Fig.'l, but showing thedrum conveyer mechanism advanced about one-half of its forward stroke.
lligureisaviewsimilartol'ig. but showingthepositionofthepartsofthedrumconveyer mechanism when thesamereaches the end of a forward stroke.
Figure 43 is a fragmentary vertical section, onanenlarged'scale,takentransverselyofthe conveyer and lengthwise of the expanding mechanism alongline43-43 Fig. l. v
Figures44and45aresimilarviewstakenon lines M-M and 45-4! Hg. l, respectively.
Figui-esac, 47, 48 are fragmentary vertical longitudinal sections, on an enlarged scale, of the conveyer mechanism, taken on lines IIL-4l, 41-.41 and 40 Fig. l, respectively.
Figure 49isafragmentaryhorisontalsection taken on line "-43 Fig. '48.
Figure 50.is`a fragmentary aide elevationof one .of ,the abutment or stop arm viewed from a plane along line lI--Il Fig. 1.
Figure 51 is a fragmentary vertical section taken on line II-Ii Fig. 45. f
Figure 53 is a fragmentary horisontal section taken on' line -I2 Fig. 43. v
In the following description similar characters of-referenee indicate like parts in the several figures of the drawings:
Each of the barrel drums, bodies or shells which is adapted to be' operated upon by the mechanism forming the subject of the present application comprises a cylindrical body Ill of sheet metal upon the opposite `ends .of which circumferential laterally projecting flanges III havebeen previously formed, as shown in Figs.
13, 43 and 44, preparatory to being introducedinto the present machine for the purpose of forming thereon two laterally projecting circumferential beads |02 between opposite ends thereof, which beads are preferably spaced equal distances from the longitudinal center of the body, as shown in Fig. 45.
In actual practice each of these beads is formed by two successive operations, the first of which serves to expand the metal circumferentially .on a part of the cylindrical body of the barrel without appreciably stretchingy or thinning of the metal;v while the second operation serves to roll this expanded metal so that a completed bead is formed on the body which. projects a substantial distance laterally from the side of the body and brings the two side walls of each bead closer together and morenearly parallel to radial lines drawn from the axis of the barrel so that these beads will serve more edectively for bearing surfaces on which the barrel may be rolled while loaded with various contents, without liability of the beads breaking down or causing leakage.
These operations of preliminarily expanding a part of the body of the barrel and partially forming the beads and then rolling this expanded part of the barrel body for the purpose of completing the formation of the beads without thinning the metal but instead insuring the fullest strength of the same, forms the subject of Letters Patent of the United States No. 1,908,521 dated May 9, 1933. and to which reference may be had for a more complete disclosure of this process.
4'I'he present application is based on the mechanism whereby the preliminary expanding and partial forming of the bead on the body of the barrel is elfected, and also on the conveyer mechanism whereby the unbeaded barrel bodies or drums are fed nrst to this expanding mechanism,
then to a machine which operates to roll the partially formed beads into their completed form, and then discharges the barrel body having the completed beads thereon from the machine. The details of this rolling mechanism, however, forms no part of the present application and is only Y I tically in the present case for the purpose of illustrating the operation of the conveyer mechanism relative thereto.
The numeral |03 represents generally the main part of the stationary frame of this machine which may be of any suitable construction for the purpose of supporting the variousI working parts of the forming the subject of this application.
In its general organization this comprises an expanding mechanism A whereby parts of the cylindrical body of the barrel are expanded in the process of forming the circumferential beads thereon, a rolling mechanism B whereby the expanded parts of the barrel body are rolled into shape for the purpose of completing the formation of the beads thereon, and a conveyer mechanism C whereby the barrel bodies are fed through the machine and successively presented to the expanding mechanism and to the rolling mechanism, and then discharged from the machine.
This conveyer mechanism is arranged lengthwise of the machine while the expanding mechanism andthe rolling mechanism are arranged transversely of the longitudinal path of the -barrel drums as the latter progress through the machine. the expanding mechanism and the rolling mechanism being arranged parallel with each other, and said expanding mechanism being arranged adjacent to the front or receiving part of the conveyer mechanism and the rolling 'mechanism being arranged adjacent to the rear or dellvery'part of said conveyer mechanism.
any suitable manner, the members of each pair being arranged on opposite sides of the'longitudinal center of the track and spaced a suitable distance apart so as to support the sheet metal drums on their undersides adjacent to the flanges Illl at opposite ends thereof as the `drums are rolled from the front end of the track to the rear end thereof in their progress through the machine. I
The rails of the front pair terminate short of the longitudinal center of the expanding mechanism which extends transversely across the path of the drums, the intermediate pair of rails extends from a point immediately in rear of the longitudinal center of the expanding mechanism to a point in advance of the longitudinal center of the rolling mechanism which extends across the path of the drums, and the rear pair of rails IUS extends from a point in rear of the longitudinal center of the rolling mechanism to the rear end of the track.
In the preferred construction the two rails of the front pair are arranged comparatively close together, while the two rails of each of the intermediate or rear pair are 'arranged further apart for the purpose of adapting the track to the mechanism which operates to move the drums over the track as the drums are advanced to and from the expanding station; also from and to the rolling station; and also delivering the same from the expanding station. A
After a drum which is to be beaded has been placed upon the front rails |04 of the track, as shown in Fig. 4l, the operator rolls this drum forwardly into a position in which the drum comes within the working range of the conveyer mechanism, which last-mentioned position is represented by the drum located at the extreme left in Fig.l 40. This position, for convenience of description, will be referred to as the first or receiving station No. 1. During the first step of the operation of the conveyer mechanism the drum is advanced toward the rear of the machine and left temporarily at rest in a position which will be designated as the second station No. 2 preparatory to expanding the body of the barrel for producing the partially formed beads thereon.
During the second step of the operation of the conveyer mechanism the drum is advanced from the second station to a position between the expanding mechanism and the rolling mechanism, which position will be referred to hereafter as the third or intermediate station No. 3.
During the third step of the conveyer mechanism the drum is fed from the intermediate station No. 3 to a position in which the drum can be operated upon by the rolling mechanism, which last-mentioned position will be referred to as the rolling position station No. 4.
During the last or fourth step of the conveyer mechanism the drum is taken from station No. 4 and advanced to a position on the rear rails of the track, from which the beaded drum is removed by an attendant or otherwise, which lastmentioned station will be referred to as the nal station No. 5.
' After the drum reaches the first, second, third andfourth stationsthe same is preventedffrom rolling rbackwardly by detent means associated with each of these stations, which detent means,
however, permit the free forward movement of the drums over thetrack. vIn the preferred form the detent means associated with the rails of the tracks at each of the stations one, two, three and four are constructed as follows:
The numeral |01 represents two detent dogs or` pawls arranged in front ofeach of the stations jone, two, threeand four, and transversely inline with each other, and each of thesev detent dogs i thedrums, as shown in Figs. 40, 4l and 42. While in its inoperative position each of these detent dogs is deiiected downwardly into a horizontal po-` sition by engagement therewith rof the drum which rolls over the same, and' after the drum has passed the rear end of this dog, the latter is again automatically elevated into its operative position so as to engage the rear side of the drum and thereby prevents the latter from rolling backwardly. f
Each of these detent dogs is mounted so as to yield under the pressure of a drum during the forward movement of the latter over the respective part of the track, and s then automatically elevated after the drum passes the respective detent dogs by means which are preferably constructed as follows:
The numeral i represents a pin whereby the lower end of each detent dog lill is pivotally connected with a plate H5 on the adjacent rail of the track so as to permit this dog to swing vertically into and out of its operative position. The detent dog is yieldingly held in its elevated rearwardly inclined position by means which comprise a horizontally movable shifting rod |09 pivotally connected at one end with a short arm H0 projecting downwardly from the detent dog below the pivot thereof, and'guided at both ends in lugs i i i on the adjacent part of the plate M5, and a spring i i2 surrounding the shifting rod M9 and bearing at one end against the guide lug Hi, while its opposite end bears against an abutment or shoulder i i3 on the shifting rod, as best shown in Figs. 42, 48 and 49.
The rising movement of this detent dog under the action of the spring H2 is limited by means of a stop pin H4 arranged on the adjacentr part of the plate H5 and engaged by the shifting arm H0 of this dog, as shown in Fig. 48. Due top this construction the drum is free to deflect eachfdetent dog IM downwardly from the upperperative position, shown by full lines in Fig. 40,to 7the horizontalinoperative position shown in 42, until the drum passes this dog, after ywhich A'the dog again is raised into its operative'position by the spring H2 so as to engage the rear side 'of the drum and prevent the same from again moving backwardly on the track.
For the purpose of accurately positioning each of the detent dogs |01 and causing the same to engage the rear side of the ydrum properly, this dog and its spring return mechanism are made adjustable lengthwise of the track by adjustably connecting the .plate I l5 with the adjacent part of one of the front rails |04 by means of lbolts H6 secured` to said rail and passing through a longitudinal slot I I1 in the plate H5, as shownfin Figs.^42, 48 and 49.
As va drum arrives at each of the stations one, two, and four, the same is temporarily enon its front or advancing side by a stop device which prevents the same from advancing for the time beingl until other functions of the 'machine have been performed, after which these preferably constructed as follows: l
The numeral ||3 represents two stop dogs or pawls arranged adjacent to the front side of each of the drum stations No. l, 2, 3, 4 and spaced transversely apart so that the same are capable of engaging each of the drums on its lower front part adjacent to opposite ends thereof when these stop dogs are in their operative elevated positions.
Each of these stop dogs is plvoted at its lower end by means of a pin ||3 on a supporting plate |23 which is mounted on the adjacent guide rail of the track and is yieldingly held in its elevated position by means of a shifting rod |2| connected at one end with a short arm |22 onthe stop dog adjacent toits pivot ||3 and guided ina lug |23 on the supporting plate |23, and a return spring |24 surrounding the shifting rod |2| and bearing at one end against the guide lug |23 and at its opposite end against a shoulder consisting of a.
screw nut |23 arranged on the shifting rod |2|.
When free, each stop dog is elevated by the spring |24 into a position in which the same inclines forwardly and upwardly from its pivot ||`3, so that the same stands in the path of the drum and arrests the same at one of the stations, as shown by full lines in Fig. 42 and by dotted. lines in Fig. 47. v
The movement of the stop dog ||3 invthis direction is limited by engagement with a stop pin |23 mounted on the adjacent part of the supporting plate |23. 'I'he stop dogs at each station remain in this elevated position for temporarily arresting the forward movement of each drum in order to permit certain functions of the machine to be performed, and then these stop dogs are depressed into a position below the path of the drums, as shown by full lines in Fig. 47, thereby enabling the drums to continue their forward movement tojthe next station. 'I'he mechanism whereby the stop dogs are thus depressed will be presently described in connection with other parts.
In order to enable the stop dogs ||3 to be adjusted lengthwise of the drum supporting track and to arrest each drum in the proper position at each station, each of the supporting plates |23 is made horizontally and lengthwise adjustable on the adjacent stationary rail of the track by means of adjusting screws |21 securedto'the respective rail and passing through a horizontal longitudinal slot |23 in the supporting plate |20, as shown in. Fig. 47.
In its preferred form the feed machanism whereby the drums to be operated upon are fed in processional order over the supporting track and to and from the expanding mechanism and rolling mechanism, is constructed as follows:-
Adjacent to the area of the drum supporting tracks and reciprocating horizontally and lengthwise relatively thereto is a feeding frame or rack which in its preferred construction comprises a front section and a rear section which are connectedsoastomoveasaunit. Thefrontsection comprises two outerv longitudinal bars |29,
|2la arranged lengthwise along the outer sides which are arranged along the outer sides of the intermediate and rear rails |33, |03, two inner longitudinal bars |33 arranged along the inner side of the intermediate and rear rails |05, |08, a front cross bar |34 connecting the front ends of the longitudinal bars |32, |32a, |33 and a rear transverse bar |33 connecting the rear ends of said longitudinal bars |32, |32a, |33.
The rear cross bar |3| of the front feeding frame section and the front cross bar |34 of the rear feeding frame section are connected with each other by means of coupling clips |36, as best shown in Figs. 1, 45, 51. This feeding frame may be guided in its longitudinally reciprocating movement in any suitable manner but the means which are preferably employed for this purpose consist of a plurality of guiding rollers |31, |31a which are pivotally mounted on brackets |33, |33a mounted on the main frame of the machine and engaged on their upper sides by the under.- sides of the longitudinal outer bars of the feeding frame, so as to form a rolling support for the latter,l as shown in Figs. l, 41, 42, 44, 45 and 5l.
Upon this feeding frame are mounted a plurality of feeding dogs or pawls |4|| ,which are adapted to engage vwith the lower front part of the drums for the purpose of shifting the same intermittently from theyflrst station No. i, successively to the second. third, fourth and fifth stations of the machine, and into a delivery position on the rear part of the track preparatory to' being removed manually or otherwise from the machine. lmounted in successive pairs on the feeding frame, each pair being adapted to engage with therear side of a drum for the purpose of moving the latter from one station to another by engaging the drum adjacent to opposite ends thereof during a forward stroke of the feeding frame, but during a rearward stroke of this frame, these feeding dogs are deflected downwardly and out of the path of the respective drums by engagement with the undersides of the latter.
For this purpose each of these feeding dogs or pawls is yieldingly mounted on one of the longitudinal bars of the feeding frame in the following manner:
'Ihe numeral |4| represents a pivot pin which pivotally connects the lower end of each feeding dog with the adjacent longitudinal bar of the feeding frame, as shown for example in Fig. 46.
These feeding dogs are preferably This feeding dog is yieldingly held in its elevated operative position in which it molines rearwardly and upwardly from its pivot 4| by meansgof a shifting rod |42 connected at' one end with a short arm |43 projecting downwardly from the respective feeding dog below the pivot thereof, a guide lug |44 which is arranged on said bar and receives said shifting rod |42, and a return spring |45 surrounding the shifting rod, and bearing at one end against the guide lug |44,
while its opposite end bears against a shoulder reference to their respective stations at this time.
|46 on the shifting rod, which shoulder preferably has the form of a screw vnut whereby the tension of the spring may be varied. The upward movement of the feed pawl |40 is limited by a stop pin |41 arranged on the adjacent longitudinal bar of the feeding frame and adapted to be engaged by the operating arm |43 of the respective feeding dog.
During the backward movement of the feeding frame each of the feeding dogs is deflected downwardly into a substantially horizontal and inoperative position by engagement with the underside of the next rearward drum on the track, which position of the dogs is indicated by dotted lines in Fig. 46. As soon as the feeding dog has passed back far enough to` clear the respective drum then the spring |45 operates to raise said feeding pawl into its rearwardly inclined position in which it operatively engages with the front side of the drum, as shown by full lines in Fig. 46,
preparatory to compelling the same to move forwardly with the feeding frame during the next forward stroke of the same.
While the feeding frame is effecting its backward stroke, means are provided for temporarily depressing the stop dogs ||8 below the path of the drums so that the latter during the subsequent forward stroke of the feeding frame will be free to move from the front to the rear part of the track while being advanced from one station to another.
The preferred means for this purpose comprise a plurality of depressing plates |48 arranged on the feeding frame in such position that during each backward stroke of the feeding frame one of said depressing plates will engage with the free end of one of ,the stop dogs ||8 and depress the same from its elevated operative position, as shown by dotted lines in Fig. 47, to its lower in operative position below the path of the drums over the rails, as shown by full lines in Fig. 47.
During the following forward stroke of the feeding frame from the front to the rear end of the machine, each of these depressing plates or members |48 holds'the respective stop dog H8 ln its lower inoperative position a suiiicient length of time to permit the next following drum to move over the same, .and as the feeding frame completes its forward stroke the depressing plate |48 associated with each stop dog ||8 again moves forwardly out of the path of the respective dog I8 so that the latter can be raised by its spring |24 and assume a position in which lit will obstruct the path of the next following drum, and be engaged by said drum at the end of the forward stroke of the feeding frame.
It follows from this that at the end of each forward stroke of the feeding frame each of the drums arranged at stations one, two, three and four will be engaged on its front side by a pair of stop dogs, and on its rear side by a pair of feeding dogs, and also by a pair of detent dogs, as shown in Fig. 42, thereby holding the respective drums in their centered position relative to the respective stations.
During the initial part of the next following rev turn or backward stroke of the feeding frame toward the front end of the machine, the pair of feeding pawls associated with each drum will be moved backwardly and leave each drum within the grip of two stop dogs engaging with the front side thereof, and two detent pawls engaging with the rear side thereof so that the drums continue to be held in their proper centered position with During the last part of the return or backward movement of the feeding frame each pair of feeding pawls is deflected downwardly by the next `following drum preparatory to engaging the rear side thereof, and each pair of stop dogs is depressed by the .respective depressing plates |48 so as to clear the path of each drum in front oi the same and permit it to be subsequently moved forwardly toward one station or the other by the next following forward or operative stroke of the feeding frame. i
In order to enable the depressing plates |48 to be accurately adjusted on the feeding frame so as to depress the respective stop dog at the proper time, means are provided for adjusting each depressing plate on the feeding frame. These means, as shown in Figs. 45, 49 and 50 preferably comprise an adjusting plate |49 carrying the depressing plate |48, and adjusting screws |50 secured to one of the longitudinal feed bars and passing through a longitudinal slot |5| in the respective adjusting plate |49.
During the backward yor return movement of the feeding frame the drums at stations 2 and 4 are elevated out of engagement with the feeding lframe while the operations of expanding and rolling beads on the drums are being performed thereon, and the backward movement of the feeding frame therefore has no effect upon the drums while located at these stations.
In order to prevent the drums from being engaged by the longitudinal bars of the feeding frame during the backward movement of the latter while the drums are occupying stations 3 and 5 the rails of the track adjacentto these stanous are provided with elevated portions, |52, |53.
|54, as shown for example in Figs. 40 and 42, whereby these drums after being deposited upon these elevated portions by the feed mechanism will be yraised above the plane of the longitudi-` nal bars forming part of the feeding frame so that the latter, during its return movement, will not engage said drums and thereby avoid any tendency to move the same backwardly or disturb their position while occupying stations I, 3 and 5, but instead will permit them to remain undisturbed in these positions preparatory to being advanced further steps during the continued operation of the machine.
Various means may be employed for effecting the reciprocating movement of the drum or body feeding frame but it is preferable to employ hydraulically operated means for this purpose which are constructed as follows:-
The numerals |55, |a represent longitudinal gear racks secured to the outer sides of the outer longitudinal bars |29 of the front feed frame section. The teeth on the underside of these gear racks are engaged by two gear wheels |56, |56a which are mounted on a transverse horizontal feed shaft |51 journaled in suitable bearings on the adjacent part of the main frame, as best shown in Fig. 43. The numeral |58 represents the cylinder of a hydraulic motor which is mounted on the lower part of the main frame and contains a piston |59 which Vis reciprocated 43 and 52. The numeral |64 represents an up' right intermediate shaft journaled on the main frame and on the -lower end of this shaft gear 4 cylinder |00 at one end thereof and the spent.
pressure medium is exhausted from the opposite end of the same the piston |00 therein will be moved in one direction and cause the gear wheels v |50 through the medium of the mechanism associated therewith, to move the feeding frame lengthwise of the machine in one direction; and upon reversing the connection for the live and spent pressure medium at the opposite end of the cylinder |50 this mechanism will operate to move the feeding frame in the reverse direction. By these means a continuous longitudinal reciprocating movement is imparted to the feeding frame and the drums are successively moved from one station to another while the machine is in operation.
To permit the lateral adjustment of the several parts of the feeding mechanism to suit drums of different lengths the following mechanism is employed:
Attached to the bars |30 and |33 are'upright brackets 000, 30|, the lower ends of which are split and have clamping bolts 002, 003 for adjustably securing these brackets to the cross bars .|3l, |34, |30, |30. By loosening thesebolts the bars |30, |33 carrying the feeding dogs |00 can be laterally adjusted according to the size of .drum to be fed.
The rails |00, |00, y |00 can also be adjusted laterally by loosening the clamps 300 at the inner 'ends of the vrail frame |00 and the clamps 000 at the both ends of the central rail frame |00, and clamp 000 at the inner ends of the delivery railframes |00, as shown in Figs. l and 40, there-V by permitting these rails to be shifted laterally on the main frame and then held in place.
'I'he guiding rollers |31 in brackets |30 carrying the longitudinal outer bars |20 and |32 remain fixed but the rollers |31a in'brackets 30a are laterally adjusted through the medium ofv gear racks 801 and pinions 000 mounted on shafts 803, as best shown in Figs. 2 and 43. Pinned to the outer ends of the shafts 000 are hand wheels 8|0.
vis slidably keyed to this shaft.
The numeral 3|3 represents a clampand 0M clamp bolts to hold the gear rack 001 in anxed position after adjustmentshave been made.
The longitudinal bar |23a carrying the right hand feed gear rack Illa is adjustably connected with the right hand end of the adjacent cross bar |3| of the feeding frame by means which include a bracket Illa projecting downwardly from said bar |20a and embracing the bar |3I, and a clamping bolt 0|4b connecting the ends of the split part of said bracket surrounding the cross bar |3|, as shown in Fig. 43.
By thus adapting the rails and bars of the track and conveyer to the length of drum which is being beaded it is possible to engage the feeding,'detent and stop dogs with the drum, as will m uftiM and holding Vmechanisml After each drum arrives at the bead expanding mechanism, vwhich is represented by station No. 2. the drum conveyer mechanism reaches the end of its forward stroke and the drum'remains at rest during the following backward stroke of the conveyer mechanism, and duringthis period d rest.. so far as the forward longitudinal movement of the drum is concerned, the same is lifted into a position in which its opposite ends are in alignment with the two sections of the expanding mechanism which are arranged on opposite sides of the path of the drums and adapted to form partial beads circumferentially on the drum adjacent to opposite ends thereof. y l
This lifting mechanism cooperates with other parts so as to hold the barrel positively in its centered position withreference to the bead expending mechanism, and as best shownin Figs. 1, 2, 5, 1, l2, 13 to 17, is constructed as follows:
The numeral |00` represents two longitudinal bars of a saddle which is adapted to raise the drum and each of which is provided on its upper side with a V-shaped seat |00a for engagement -with the underside of the drum adjacent to one end thereof, so that when the seats of athese two bars engage with the drum the latterv will be centered with reference to this elevating mechanism and maintained in this position while being lifted. These saddle bars, during the forward stroke of the conveyer mechanism, are arranged below the path of the drums, as represented by dotted lines in Fig. 'I and by full lines in Fig. 13; and after the conveyer mechanism reaches the forward end of its stroke these saddle bars rise, and by engagement with the underside of the drum, lift the latter so that the same is axially in line with the elements of the bead expanding mechanism which is adapted to formf the beads on the drum, as shown by full lines in Figs. 5 and 1.
These saddle bars form part of a vertically movable lifting frame which comprises upright bars |00 connected at their upper ends with opposite ends of the saddle bars |00, horizontal transverse bars |10 connecting the lower ends of the corresponding upright bars |00, and a y vertically movable slide |1| provided with laterally projecting arms |12 which are connected with the intermediate parts of said transverse bars 10. The slide |1| is guided in its vertical movements on a guide rod |13 depending from the adjacent part of the main frame |03. The cooperating surfaces of this slide and the guide rod |13 are of noncircular form so that the slide is free to rise and fall on this rod but incapable of turning thereon,
thereby always maintaining the saddle bars inA `the proper position relative to the parts with' which the same cooperate during the operation of the machine.
'I'he power for raising and lowering this lifting frame is preferably derived from a hydraulic motor having a horizontal cylinder |14 mounted horizontally and transversely on the lower part of the main frame, a piston |15 reciprocating in this cylinder-and provided with a piston rod |10 extending through one head of the cylinder. This piston is reciprocated by alternately admitting a live pressure lfluid into and exhausting the spent pressure fluid from opposite ends of this cylinder by means of a valve mechanism which will be described later on.
Motion is transmitted from this motor to the lifting frame by means of a driven lever of elbow or bell crank form and having a lower horizontal arm |11 which isy connected at its free end by means of a link |18 with the slide |1| and has an upwardly projecting adjusting arm |19; and a driving lever of straight form having a lower arm |80 which is connected by means of a link |8| with thepiston rod |16 while its upper adjusting arm |82 is connected with the adjusting arm |19 of the driven lever. The driving and driven levers of this transmitting mechanism are so mounted and connected with each other that the vertical strokes of the lifting frame may be regulated to insure accurate alignment of the drum with the expanding mechanism in the elevated position of the drum and also to permit of adapting the machine to drums of various diameters and Still maintain a uniform stroke of the piston of the hydraulic motor. This is preferably accomplished as follows:
The numeral' |83 represents the pivot of the driven elbow lever which is mounted horizontally and lengthwise of the machine on a bracket |84 on the lower part of the main frame; and |85 represents a rock shaft forming the pivot of the driving lever and journaled horizontally and lengthwise in a bearing |86 on a higher part of the main frame so that the axis of the driving rock lever |80, |82 is out of line with and higher than the axis of the driven rock lever |11, |19, as shown in Fig. 14. The adjustable connection between the upper adjusting arms of these levers is preferably effected by means ofan adjusting block |81 preferably of square form sliding in a radial groove |88 in the arm |82, an adjusting pin |89 projecting from this block |81 into a radial slot |90 in the adjusting arm |19, and an adjusting screw 9| turning in a lug |92 on the arm |19 but held against lengthwise movement thereon and having threading engagement with a lug |93 on an adjusting plate |94 which connects with the adjusting pin |89.
By this means motion is transmitted from theA driving lever to the driven lever for actuating the barrel lifting frame by power derived from the hydraulic motor |14. By turning the adjusting screw 9| in one direction or the other the point of connection between the driving and driven levers of this mechanism'may be moved toward or from the axes of these levers and thereby either shorten or lengthen the stroke of the drum lifting frame relative to the throw of the piston |15 of the motor which actuates the same. This relative action of these levers is indicated diagrammatically in Fig. 1'?, from which it will be observed that a comparatively long arc movement of the adjusting arm |82 of the driving lever will effect a comparatively short arc movement of the driven rock lever, owing to the cifset arrangement of the axes about which these levers turn, and that a shifting of the connection between the adjusting arms of these levers will produce a corresponding decrease or increase in the arc movement of the driven lever, while the arc movement of the driving lever remains the same. By this means the lifting mechanism of this machine can be readily adjusted accurately to properly elevate drums of different diameters to the mechanism which operates on the drums preparatory to forming beads thereon.
In order to enable the operator to readily determine the effective stroke of the drumlifting frame the adjusting plate |94 is provided with a longitudinal row of graduations |95 which are adapted to register with some convenient mark or location on the adjusting arm |19, for example the upper edge of the same, as best shown in Fig. 13.
The mechanism of this machine is so timed that after the conveyer reaches the end of a forward stroke and the respective feeding dogs of the same bring a drum to the expanding station of the machine, then the lifting mechanism is operated by its motor so that the saddle engages with the underside of the respective drum and raises the same from the conveyer into a position in which the drum is axially in alignment with the operating elements of the bead expanding mechanism and enable the latter to operate properly upon the drum for the production of beads thereon.
In order to positively hold the drum in a position in which it is aligned with the expanding mechanism, means are provided which are engaged by the upper side of the drum in its elevated position so that the drum is gripped both on its underside and on its upper side and thereby reliably held in place while the bead expanding mechanism is operating upon the same.
Various means may be provided for this purpose but those shown in the drawings have been found satisfactory in practice. As there shown, these means comprise two retaining or abutment heads or bars |96 arranged above the path of the drums at the expanding station and adapted to be engaged by the upper side of the drum adjacent to opposite ends thereof when the same is in its elevated position, as shown in Figs, 5 and 7, a vertical adjusting rod |91 projecting upwardly from each of these retaining heads and slidably mounted in a pair of guide lugs |98 which are mounted on the upper part of an overhanging arch |99 forming part of the stationary frame of the machine, an adjusting collar 200 arranged upon the adjusting rod |91 between the guide lugs |98, and a set screw threaded into this collar and' engaging this rod. Upon loosening the screw 20| the rod |91 may be adjusted vertically in order to bring theabutment head |96 into the proper position to be engaged by the upper side of the drum when the latter hasbeen elevated by the lifting mechanism into a. position in which it is accurately in alignment with the bead expanding mechanism, thereby holding the drum reliably in place during the subsequent operations of forming beads thereon.
vBead expander slides o1' carriages After the drum has been elevated from the conveyer mechanism into a position in which it is in axial alignment with the bead expanding mechanism, ^the same is operated upon by the expanding mechanism for producing the circumferential beads thereon adjacent to opposite ends of the drum. 'I'his expanding mechanism comprises two sections D, E which are arranged along opposite sides of the conveyer mechanism at the expanding station, and each of these expanding mechanisms is adapted to produce one of the beads on the drum at a point between the center and the end thereof, as will presently appear.
The two sections of this expanding mechanism are mounted respectively on horizontally and -transversely movable slides or carriages 202d,
202e which are arranged on opposite sides of -the path of the drum conveying mechanism, and each of which is guided on the main frame by means of anges 203 arranged on the lower part of the respective slide, and moving in horizontal transverse guideways 204 formed on the adjaleo cent part of the main frame |02, as best shown f!! F188. 2, 5, 9 and 11.
Each of these slides or carriages is preferably actuated by a motor so that the same is retracted and the .working parts thereof are out of the path of the drums while the latter are being moved forward by the conveyer mechanism, but after a drum has been moved forward to the expanding station by the conveyer mech# drum, lpreparatory. to producing the beads thereon.
The motors for this purpose preferably are of the hydraulic type and comprise power cylinders M, 200e mounted horizontally and transversely on the main frame below the slides 202d,
202e and are provided with pistons 20w-,200e which have rods 201 projecting through the outer head of the respective cylinder. The pistons ofthese motors have uniform throw and are reciprocated within their cylindersl by alternately admitting live pressure medium to and discharging the spent pressure mediunr at opposite ends of this cylinder by valve mechanisms, as will presently appear.
In order to permit of adjusting the position of each slide 202d. and 202e with reference to the hydraulic motor which actuates the same and enable the expanding elements of the respective slide to be so located that the beads are produced at the desired place on the barrel bodies, means are provided whereby each slide may be adjusted lengthwise with reference to its motor.
In the preferred form these means, as shown in Figs. 2, 5 and l1 comprise a cross head 200 secured to the outer end of the piston rods 201, and longitudinal adjusting screws 209 which are mounted on brackets 2I0 on an adjacent part of the respective slides so as to be capable of rotation thereon but held against lengthwise movement thereon, and having threaded engagement with nuts 2H on the adjacent part of the cross heads 200. Upon turning the screw 200 in one direction 4or the other the slides and the expanding mechanism mounted thereon will be moved lengthwise of its motor but transversely of the path of the drums and thereby enable the expanding mechanism to be accurately located for performing the bead expanding operation properly on the respective end of the drum.
Means are provided for causing the two slides which carry the two sections of the bead expanding mechanism tory move simultaneously, horizontally and transversely relative to the conveyer mechanism into and out of their operative position, and thus securing uniformity of action in the machine and enabling these sections to properly form the beads at opposite ends of the barrel body. A satisfactory means for accomplishing this purpose is shown in the drawings and comprise an equalizing gear wheel 2i2 rotatably mounted by means of a vertical axis 2li which is journaled on a part of the main frame of the machine below the path of the conveyer adjacent to the bead expanding mechanism, as best shown in Figs. 6 and 7, and meshing on its diametrically opposite sides with gear racks 2M, each of which is arranged transversely of the machine and is connected at its outer end by amera means of an attaching arm 2| l with the respective cross head-200. By this means the pistons 200k of both hydraulic motors which shift the expander supporting carriages or slides are compelled to move in unison into and out of their operative positions and thus insures the proper timing of the operation of the two sections of this expanding mechanism on opposite ends of the drum. v
Bead expanding mechanism Upon each of the slides or carriages 2021i, 202e of the bead expanding mechanism is mounted means for producing a circumferential bead adjacent to one end of the body of the sheet metal barrel byexpansion of the metal thereof from the interior of the body, which' means are identical in construction so that the following description of one will apply to both of these means, but for convenience in subsequently describing the operation of the Ymachine as a whole the means for expanding a bead on one end of the barrel body is identified by the reference character D, and the means for expanding a bead adjacent to the opposite Iend of the barrel bodyz f rear ends on guideways 2|0, 2|9 forming part of this slide or carriage. Reciprocating movement is imparted to this shifting rod by means of a motor which is preferably of the hydraulic type and mounted on the respective carriage so as to move bodilytherewith.
As best shown in Figs. 1, 2, 5 and 29-37 these hydraulic motors comprise power cylinders 22nd, 220e mounted respectively on the vouter or rear ends of the carriages 202d, 202e and pistons 22id, 22|e reciprocating lengthwise in these cylinders and each provided with a piston rod 222 which is connected by means of a coupling with the outer end of the respective shifting rod 2|1, as best shown in Figs. 5, 10 and 20. `This coupling consists of two coupling blocks 222 which are clamped against opposite sides of lthe opposing ends of each piston rod 222 and the shifting rod 2| 1 and held together by means of screws 224, one end of these blocks having threaded engagement with the piston rod, as shown at 225, and the opposite end of these blocks being provided with internal anges 22B which engage with an annular groove 221 in the adjacent outer or rear end of the respective shifting rod 2I1, as shown in Fig. 10. A pressure medium is alternately admitted into and discharged when spent from opposite ends of each of the cylinders 220d, 220e for the purpose of reciprocating the pistons therein by a controlling valve mechanism which will be presently described.
The numeral 220 represents an inner or front follower which is connected with the inner or front end of each follower or shifting rod 2I1 and the numeral 220 is an outer or rear follower secured to the rear part of this follower rod. Around the inner or front follower 220 a plurality of expanding shoes or dies 200 arearranged aocaele in an annular row, each of these shoes or `dies being provided with a die face 23| which is of segmental form circumferentially of the axis oi the follower rod and of rounded form in cross section. These several expanding shoes or dies are movable radially simultaneously for the pin'- pose of contracting the several expanding shoes as aA whole and reducing the diameter of the forming surfaces thereof in order to permit of introducing these expanding shoes into one end of the body of the sheet metal barrel which is to be operated upon and thereafter spreading or moving these shoes radially outward for the purpose of increasing the diameter of the forming surface of the several expanding shoes and causing them to simultaneously engage theinterior of the sheet metal body of the barrel and deflect that part of the metal thereof which is engaged by these die faces outwardly so as to form an annular bead on the barrel body, as shown in the left hand part of Fig. 5 in connection with the section D of the expanding mechanism.
After the metal of the barrel body or drum has been thus expanded to form this annular outwardly projecting bead thereon the several die shoes are again contracted so as to reduce the diameter of the forming or die faces thereon and permit these expanding shoes to be withdrawn from the respective end of the barrel body. This radial movement of the expanding shoes is produced by motion derived from the longitudinally movable follower rod 2H and its front and rear follower heads 223, 229. The means for this purpose include a plurality of longitudinal expanding levers 232 arranged in an Vannular row around the follower rod 2||, each of these levers being pivoted between its front and rear ends by means of a pivot 233 to the adjacent part of the carriage support 2|6. Each lever has one of the expanding shoes or dies 230 secured to its front end. An annular row of radial toggles or links 234 is provided each of which is pivotally connected at its inner and outer ends with the periphery of the front follower and the inner end of one of the shoes 230. An annular row of rearor front toggles or toggle links 235 is provided, each of which is pivotally connected at its inner end with the rear-arm of one of the expanding levers 232 and pivotally connected at its outer end with the peripheral part of the rear follower 229,*as shown in Figs 5, 8 and 9.
While each carriage or slide is effecting its forward movement the respective follower rod 2| 1 and the followers mounted thereon are arranged in their rearmost position relative to this carriage so that the front and rear sets of toggles assume an inclined position and cause the several expanding levers and the expanding shoes or dies to be moved in a direction which will contract the shoes and permit the same to be introduced into an end of the drum or body of the barrel, as shown in connection with the right hand section E of the bead expanding mechanism.
After the expanding shoes or dies have reached the desired position within the sheet metal drum or body of the barrel, each expander supporting carriage remains at rest and the follower vrod 2|1 and itsfollowers 228, 229 are moved forwardly or inwardly whereby the front and rear sets of toggles 234, 235 are shifted from the inclined position shown in connection with section E to the straightened or radial position shown in connection with section D of the expanding mechanism, thereby causing the several radially outward. thereby producing an annular 3 or circumferential bead |02 on the exterior of this drum or body, as shown in connection with section D of the expanding mechanism in Fig. 5. Each expander carriage or slide remains at rest until the several expanding shoes or dies associated therewith have been contracted into their inoperative position and then the respective expander carriage or slide is again moved rearwardly or outwardly relative to the drum conveying mechanism in order to release the respective drum and permit the same to be advanced another step in its progress through the machine.
In order to guide the front part of the expanding mechanism of each section properly into the respective end of the drum or barrel body guiding means are provided which are movable with, the carriage of each expanding section and engage with the inner side of the top of each drum or body. In its preferred construction the guiding means associated with each section of the expanding mechanism comprises a guide bar 236 arranged lengthwise adjacent to the upper part of the support 2I6 of Aeach of the carriages or slides 202d, 202e and having its front end secured to a tubular extension 231 of the respective support 2|6 and provided with an inclined outer face 233, and anadjusting screw 233 arranged on the rear part of the guide bar 236 and engaging with the adjacent part of the support 2|6. as shown in Fig. 5. As each of the carriages 2il2d, 202c moves forwardly the respective inclined face 238 of the guide bar 233 engages with the'upper part of the bore of the barrel body or drum at one end thereof, and raises the same into engagement with the adjacent abutment |96 until the drum engages with the horizontal rear part 24| of this bar, thereby properly centering the drum with reference to the several expanding shoes or dies before the latter are engaged with the bore of the drum and produce an outwardly projecting bead thereon. 'I'he front arms of the expanding levers 232 are preferably guided in their radial movements by radial guide slots 240 which are formed on the front ends of the support extension 231 and receive the respective arms of these levers, as best shown in Figs. 1, 2 and 5.
As an additional means for accurately locating the barrel drum or body with its longitudinal axis transversely of the conveyer mechanism and parallel with the line of movement of the car-V riages or slides of the two sections of the expand- 'ing mechanism, each of these slides is provided with end gaging means which are adapted to engage with opposite ends of the barrel drum or body during the last part of the forward or inward movement of these slides toward each other, and thereby definitely locate this drum between these slides preparatory to forming the beads thereon.
In the preferred construction these end gaging means comprise two gaging plates 254 arranged adjacent to the upper part of each expander supporting slide or carriage on opposite sides 4of' the longitudinal center thereof in position to engage with the upper part of one end of the barrel drum when thev respective slide isv in its foremost or innermost position. Each of these end gage plates is capable of longitudinal adjustment on the respective slide for the purpose of adapting the