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Publication numberUS2261060 A
Publication typeGrant
Publication dateOct 28, 1941
Filing dateAug 15, 1938
Priority dateAug 15, 1938
Publication numberUS 2261060 A, US 2261060A, US-A-2261060, US2261060 A, US2261060A
InventorsGiesler Jean V
Original AssigneeFulton Sylphon Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Automatic tube drawing press
US 2261060 A
Abstract  available in
Images(6)
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Claims  available in
Description  (OCR text may contain errors)

Oct. 28, 1941.

J. v. GIESLER .AUTOIATIC TUBE DRAWING PRESS Filed Aug. 15. 1938 6 Sheets-Sheet 1 Oct. 28, 1941.

. J. v. GIESLERV AUTOMATIC} TUBE DRAWING PRESS Filed Aug 15, 1938 S Sheets-Shae; 2

1 J. v. GIESLER I 2,261,060

AUTOMATIC TUBE DRAWING PRESS Oct. 28, 1941.

Filed Aug. 15, 1938 6 Sheets-Sheet 3 FLUIDLEVEL @a/Wu Lm, Man r), fill Oct. 28, 1941.

J. V. GIESLER AUTOMATIC TUBE DRAWING PRESS Filed Aug. 15, 1938 6 Sheets-Sheet 4 jar/n MM.

Oct. 28, 1941.

.1. v. GIESLER AUTOMATIC TUBE DRAWING PRESS 6 Sheets-Sheet 5 I Filed Aug. 15, 1958 J. v. GIESLER' AUTOMATIC TUBE DRAWING PRESS Filed Aug. 15, 1938 6 Sheets-Sheet 6 Patented 08:. 28, 1941 AUTOMATIC TUBE DRAWING PRESS Jean V. Giesler, Knoxville, Tenn assignor to The Fulton Syiphon Compa y, Knoxville, Tenn. a

corporation of Delaware Application August 15, 1938, Serial No.- 225,034

' 28 Claims. (01.205-4) This invention relates to automatic tube drawing presses and more particularly to hydraulically .operated tube drawing presses in which the various steps of the operation are automatically-performed in proper sequence.

Generally the apparatus of the present invention comprises a piston operating one or 11 desired a pair of oppositely disposed slides each carrying a mandrel and having dies cooperatively arranged with respect to the man'drels, each'of the dies having a hopp r arranged to feed tube blanks into position to be entered by the mandrel,

whereupon the mandrel is then-forced through the die to draw the tube blanks in succession, the action of each mandrel being automatic and if a pair are used they operate respectively on-opposite strokes.

'Heretoiore tube drawing presses have been known in which a piston operates a mandrel carrying a tube to be drawn 'and forces the tube through a die to draw the tube as desired. In these devices many of the steps of operation were of necessity.' manually controlled and as but one mandrel was operated by the piston the rate of production was relatively low and the standard of production lacking in desirable uniformity due to the human equation of the operator.

It is accordingly one object of the present invention to provide a novel tube drawing pressin which the steps of operation are automatically controlled.

' Another object of this invention is to provide a novel tube drawing press in which the motion of v a piston in both halves of itsreciprocatory cycle relation with the means hydraulically operating.

trolled to efiect the drawing of a tube, preferably 1 during both halves of the reciprocatory cycle oi. the piston.

Another object 01' this invention is to provide a novel automatic tube drawing press in which aends of the tube blanks before the mandrel enters the tube blanks.

and then automatically and in proper sequence in the operating cycle move the tube blanks into position and hold them for engagement with the mandrel. Another object of this invention is to provide 'a novel automatic tube drawing press in which novel feeding means are automatically operated hydraulically in proper sequence and in timed the mandrel or mandrels to flrsthold the tube blanks while their open ends are being automatically flared and then to movethe tube blanks into position'for and to hold them during engagement with the mandrel.

Another object ofthis invention is to provide a novel automatic tube drawing press in which a novel 'die assembly automatically strips the drawn tube from the mandrel at the termination of the drawing cycle. Another object of this invention is to provide a novel automatic tube drawing press in which novel means are hydraulically and automatically actuated in proper sequence in the cycle to move into engagement with and assist the novel tube blank feeding means in holding the tube blank while it is engaged by the mandrel.

Another object of this invention is to provide a novel automatic tube drawing press in which a novel hydraulic system automaticaly and in proper timed relation actuates the various operations of my novel press.

Another object of this invention i to provide a novel automatic tube drawing press having a novel automatic hydraulic actuating system which may be manuallystopped at any stage of the operating cycle-and which will recommence operations at thepoint where again manually started. Another object of this invention is to provide a novel automatic tube drawingpress which is' simple in construction, durable, eiiicient, easily operated and inexpensive to manufacture and maintain.

"Other objects of the present invention will ap beer as the description thereor proceeds.

' The presentinvention is capable of expressionin. many and various'mechanical embodiments,

one oi. which is illustrated in the accompanying drawings; but it is to .be expressly understood that Another object of this invention is to provide a novel automatic tube drawing. press in which novel feeding means are utilized to first hold the tube blanks wlule'their-open ends are. being flared the same reference characters are employed to the drawings are for the purposes ofillustration stopped when i designate corresponding parts in the several figures:

Fig. 1 is a front elevation of an illustrative embodiment of the novel tube drawing press of the present invention showing the relative positions of the several parts;

Fig. 2 is a rear elevation of the illustrative embodiment of the present invention shown in Fig. 1 showing in detail the novel. automatic hydraulic actuating system;

Fig. 3 is a side elevation of the illustrative embodiment of the present invention shown in Fig. 1 as seen from the right in Fig. 1;

Fig. 4 is a cross sectional view on line 4-4 in Fig. 1 showing in detail the novel tube blank feeding means;

Fig. 5 is a cross sectional view of the die assemblyused with the illustrative embodiment of the present invention shown in Fig. 1 showing a tube blank being forced through the die;

Fig. 6 is a cross sectional view of the novel stripper used with the illustrative embodiment of the present invention shown in Fig. 1 shown holding the drawn tube as the mandrel is being withdrawn;

Fig. '7 is a.detailed view of the novel stripper used with the illustrative embodiment of the present invention shown in Fig. l;

Fig. 8 is a perspective view of the novel tube blank conveyor used with the illustrative embodiment of the present invention shown in Fig. 1;

Fig. 9 is a front view of the novel tube blank conveyor shown in Fig. 8;

Fig. 10 is a top view of the novel tube blank conveyor shown in Fig. 8; and

Fig. 11 is a side view of the novel tube blank conveyor shown in Fig. 8. as seen from the right in Fig. 8.

In the several figures I0 is any suitable base for my novel press suitably mounted on legs Mounted on base l0 are uprights l2 and I3 designed to carry between them a cylinder I4 the assembly being secured together by tie bolts |5.. Mounted in cylinder 14 is piston l8 having piston rods l1 and I8 secured thereto and passing through suitable stufling boxes I9 and in the ends of cylinder |4. Secured at opposite ends of base ID are die housing members 2| and 22. Carried by and extending between upright l2 and die housing 2| are mandrel slide guides 23 r and 24 upoii which is designed to reciprocate the mandrel slide 25 which is secured to piston rod l1. Mandrel slide 25 carries for reciprocation a mandrel 28. Carried by. and extending between upright I3 and die housing 22 are mandrel slide guides 21 and 28 upon which is designed to reciprocate the mandrel slide 29 which is secured to the piston rod l8. Mandrel slide 29 carries for reciprocation a mandrel 30.

Carried on bed Ill between upright 3 and die housing 22 is tube blank feeding assembly gen erally indicated at 3| and shown in more detail described hereafter: Rotatably mounted in side walls 31 and 38 is a shaft 43 having fingers 44 secured thereto within the hopper and having a gear 45 mounted thereon outside side wall 31, gear 45 having a one way clutch engagement with shaft 43 to rotate shaft 43 in a clockwise direction only as seen in Fig. 4. Engaging gear 45 is a rack 48 having a downwardly depending arm 41 secured to piston rod 36, as at 48, and secured to a slide bar 49 as by screws or bolts 50, slide bar 49 being reciprocally mounted in track 5| formed in the top of bracket 32 and in Fig. 4. As seen in Fig. 4 a hollow bracket 32 is suitably secured to base ID as by bolts or screws 33 and carries thereon a cylinder 34 within which is reciprocally mounted a piston 35 having a piston rod 36. Secured to bracket 32 are hopper side plates 31 and 38 (Figs. 1 and 2) forming with front plate 39 and sloping rear plate 40 a suitable hopper for the tube blanks to be drawn.

Rear plate 40 is' suitably shaped as at 4| to form a downwardly directed delivery orifice in conjunction with a guideplate 42 secured between side plates 31 and 38 to allow one tube blank at a time .to be fed to the carrier as will be more fully being designed to pass directly beneath the delivery orifice, above described, of the tube blank hopper.

Suitably secured to slide bar 49 as by screws.

or bolts 52 is my novel tube blank conveyor generally shown at 53 and shown in more detail in Figs. 8-11. As seen in these figures my novel tube blank conveyor comprises a body member 54 recessed at 55. to form a tube blank receiving pocket having an end 56 against which the closed end of the tube blank is designed to abut and a bottom 51. Body member 54 is further recessed at 58 and has rotatably mounted therein on shaft 59 spring clip base 58 to which are suitably secured spring clips 8| extending upwardly to hold the tube blanks in the tube blank pocket. Base has an extension 82 within which is pivotally mounted as at 63 a rod 84 engaging a suitable spring 65 (Fig. 4) which tends to rotate base 80 and urge spring clips 6| into engagement with the tube blank as shown in Fig. 11.

With reference again to Fig. 4, secured to slide bar 49 for reciprocation therewith and depending through a suitable slot 86 in the top of bracket 32 is arm 81. Passing through arm 61 and secured to bracket 32 is rod 68 havin mounted thereon stop nuts 69 and 10 to afford an adjustable stop for the movement of arm 81 to the left as seen in Fig. 4. Threaded through 4 plate 11. Also secured to plate 11 and extending in the line of rod 15 is plunger 18 passing through the opposite side of base l8 and extending into a suitable dash pot 19. Plate 11 is transversely slotted at 80.

Secured to base III as by bolts or screws 8| and 82 and lying generally in the plane of bracket 32 is hollow frame member 83 having formed in its top asuitable track 84 and being slotted as: at 85. Mounted transversely in frame member 83 is shaft 85 upon which is rotatably mounted a rocker arm 81 recessed at 88 to embrace plate 11 and moving therewith through pin 89 passing through slot 80. Rocker arm 81 is also recessed at 90 to embrace the depending lugs, 9| and 92 secured to slide bar 93 mounted in track 84 and imparting reciprocating movement thereto through pin 94. Mounted on slide bar 93 is tube blank conveyor backer 95 having surfaces 96 and 91 designed to further hold and support the tube blank in said tube blank conveyor. Backer 95 is adjustable by set screw 98.

ation with mandrel 38. More particularly with reference to Fig. 5 a tube blank 99 mounted on having a smaller I necting with pump I09 is die carrier IIO provided with annular die surface I] I. Stripper plate I08 is annularly cut away at II2 to receive the stripper II3. Stripper H3 is shown in more detail in Fig. 7 and comprises a three part annular member smaller in diameter than the annular recess 'II2 made up of wedge shaped sectors H4, H5, H6 each section being circumferentially slotted as at II1 to receive an elastic ring II8 of suitable material such as rubber to hold the sectors together.-

Member H3 is centrally bored at II9, boring II9 diameter than that of the finished tube and being cut away as at I20 (Fig. to form an entering surface for the tube being drawn. Cooling medium is conducted to die surfaces I01 and III through conduit 9' bored in housing 22 and-nozzle I20.

With reference now to Figs. 2 and 4 means are provided for flaring the open end of the tube blank to facilitate entrance of the mandrel. To flare the open end of the tube blank a cone shaped die I2I is fixed to a projecting shoulder I22 of mandrel slide 29 and is so positioned-- as to engage the open end of the tube blank when the tube blank is in the conveyor 53 beneath the delivery orifice of the hopper.

Positioned between upright I2 and die housing 2I for cooperation with mandrel slide 25 and mandrel 26 is a tube blank feeding assembly generally indiated at I23 which is the exact counterpart of the tube blank feeding assembly 3I above described in detail and having a cylinder I24 (Fig. 2) the exact counterpart of cylinder 34 (Figs. 2 and 4) in blank feeding assembly 3| as well as the other associated parts above described. Further die housing 2| is the exact counterpart of die housing 22 above described and contains all the elements above, described in detail with reference to die housing -22 while mandrel slide 25 is provided with a cone shaped die identical with die I2I of mandrel slide 28.

The hydraulic system for use with the above described apparatus is shown in Figs. 1, 2, and 3. Referring to these figures an hydraulic reservoir I25 is mounted within base I0 and is of suitable size to contain enough mands of the present invention. From reservoir I25 an intake I26 leads to high pressure pump I21/which isgsecured to and driven by any suitable electric motor I28 mounted on bed I0. Mo-

.tor I26 is supplied with electrical energy from any suitable source through a fuse box I29 and conduits I30, an electrical switch I3I (Fig. 1)' being provided to start and stop motor I28. From pump I21 a pipe I32 leads fluid under pressure to elbow I38. A pipe I34 leads from elbow I33 to a hausts into reservoir I25. A gauge I36 connecting with albow I33 through pipe I31 shows the pressure at elbow I33 while a gauge I38 con- I21 through pipe I39 shows the pressure at pump I21. From elbow I33 a' pipe I40 leads to pressure to three way valve I43 which is preferably a selffluid to meet the def feed control valve I35 which ex-' operated valve HI. A pipe I42 leads from pressure operated valve I4I is led a pipe I58 through elbow I45 and pipe I46 back to reservoir I25. Pressure operated valve I is controlled by manually operable valve I41 connected thereto by pipe I48 and exhausting through pipe I49 into reservoir I25. From three way valve I43 a pipe I50 leads toone side of cylinder I4 and pipe I5l leads from three way valve I43 to the other side of cylinder I4. From three way valve I43 a pipe I52 connects with pipe I46.

Carried by pump I21 and driven by motor I28 is low pressure pump I53 drawing fluid from reservoir I25 through inlet I54. 'Fluid under pressure is forced from pump I53 through pipe I55 to pressure operated valve I56. Pressure operated valve I56 exhausts through reservoir I25. From pressure operated valve I56 closed by a cap I59. From pipe I58 fluid under pressure is led through pipe I60 to pilot valve I6I which controls three way valve I43. From pilot valve I6I a pipe I62 leads to one side of three way valve I43 and pipe I63 leads to the other, pilot valve I6I exhausting into reservoir I25 through pipe I64. Pilot valve I6I is operated by a slide rod I65 slidably mounted in uprights I2 and I3 and having secured thereto fingers 'I66'and I61 designed to engage operating handle I68 of pilot valve I6I. Slide rod I65 is reciprocated by the action of mandrel slides 25 and 29 which contact slide rod I65 during part of their reciprocatory cycle.

From pipe I58 a pipe I69 leads to pilot valve I10. Pilot valve I10 connects to opposite sides of cylinder I24 through pipes HI and I12 and exhausts into reservoir I25 through pipe I13. Pilot valve I10 is actuated by fingers I14 and I15 secured to rod I16 which in turn is secured to mandrel slide 25, fingers I14 and I15 engagingoperating handle I11 of pilot valve I10. From pipe I58 a pipe I18 leads to pilot valve I19. Pilot valve I19 connects to opposite sides of cylinder 34 through conduits I and I8I and exhausts into reservoir I25 through pipe I82. Pilot valve I18 is actuated by fingers I83 and I84 secured to rod I85 which in turn is secured to mandrel slide 29, fingers I83 and I84 engaging operating handle I86 of pilot valve I19.

A pipe I81 (Figs. 1 and 2) leads fluid under -'pressure from any suitable source to conduits H9 and nozzles faces I01 and III. p

With the embodiment of my novel automatic tube drawing press set up as above described and as illustrated in the drawings, to place the same in operation the operator closes the electrical circuit to electric motor I28 by closing switch I3I. Motor I28 then rotates pumps I21 and I53. Rotation of pump '21 draws fluid from reservoir I25 through intake I26 and discharges the fluid under pressure into pipe I32, elbow I33 and pipe I34, pressure control valve I35 acting to regulate this pressure by exhausting surplus fluid into reservoir I25. Fluid under pressure passes from elbow I33 into pipe I40 and backs up against pressure operated valve I4I which is normally closed. At the same time rotation of pump I53 draws fluid from reservoir I25 through inlet I54 and discharges it under pressure into pipe I55 from which it passes. to pressure control valve I56 which acts to exhaust excessive fluid through pipe I51 into reservoir I25. From pressure control valve I56 fluid under controlled pressure passes into pipe I58 and backs up against cap I59, and enters pipe I60 passing into pilot valve I6I. The operator now manually opens valve pipe I51 into I20 (Fig. 5) to cool the die sur- I41 which allows pressure to bleed from pressure operated valve I through pipe I48 and exhaust into reservoir I25 through pipe I49 opening valve I and allowing fluidv under pressure to pass into pipe I42 and three-way valve I43.- Pilot valve I6I is so regulated that fluid under pressure now passes therefrom through pipe I62 into the top of three-way valve I43 operating three-way valve I 43 to allow fluid under pressure to. pass therefrom into pipe I50 and into the left-hand side of cylinder I5 as seen in Fig. 2.

Fluid under pressure in the left sideof cylinder" I5 forces piston I6 and piston rod I8 to the right sliding mandrel slide 29 to the right, the fluid in the right side of cylinder I5 exhausting through pipe I5I, three-way valve I43, pipe I52 and pipe I46 into reservoir I25. Movement'of mandrel slide 29 to the right carries with it rod- I85 and fingers I83 and I84 until finger I84engages operating handle I86 of pilot valve I19 operating pilot valve I19 to allow fluid under pressure to pass from pipe I58 through pipe I18, pilot valve I19 and pipe I80 into the left side of cylinder 34 (Fig. 4) to move piston 35 to the right, the fluid in the right side of cylinder 34 exhausting through pipe I8I, pilot valve I19 and pipe I82 into reservoir I25. Viewing the operation from Fig. 4, movement of piston 35 to the right moves piston rod 36 and arm 41 to the right which in turn moves rack 46 to the right rotating gear 45, shaft 43 and fingers 44 in a clockwise direction to insure the feeding of tube blanks to the delivery orifice. Movement of arm 41 to the right moves slide bar 49 to the right and with it the tube blank conveyor 53 carrying a tube blank fed into it at the delivery orifice. Movement of slide bar 49 to the right moves arm 61 to the right and with it rod 15, plate 11 andplunger 18, dash pct 19 acting to cushion the movement of these parts. Movement of plate 11 to the right rotates rocker arm 81 in a counterclockwise direction moving conveyor backer 95 to the left until it comes into contact with the tube blank conveyor 53, surface 96 of hacker 95 contacting spring clips 6| and surface 91 contacting a portion of the upper surface of the tube blank to assist in holding itin the tube blank conveyor 53. Meanwhile mandrel slide 29 has continued its motion to the right in Fig. 2, the movement of tube blank conveyor 53 and backer 95 being so regulated that they contact at least by the time mandrel 30 enters the flared end of the tube blank in the tube blank conveyor 53. Further movement of mandrel slide 29 to the right forces mandrel 30 into the tube blank the closed end of the tube blank abutting the end 56'of. the conveyor 53 until the mandrel 30 has completely entered the tube blank. At this time finger I83 on rod I85 engages operating handle I86 of pilot valve I 19 so operating pilot valve I19 that fluid under pressure is now supplied from pilot valve I19 through pipe I8I to the right side of cylinder 34 (Fig. 4) moving piston 35 to the left the fluid in the left side of cylinder 34 exhausting through pipe I80, pilot valve I19 and pipe I82 into reservoir I25. Movement of piston 35 to the left as viewed in Fig. 4 moves piston rod 36, arm 41 and rack 46 to the left, rack 46 rotating gear 45 in a counterclockwise direction loosely upon shaft 43 without rotation of shaft43 and fingers 44. Movement of, arm 41 to'the left moves slide bar 49 to the left carrying with it tube blank conveyor 53. Movement of slide bar 49 to-the left moves arm 61, rod 15, plate 11 and plunger to the left 75 ton rod I1, mandrel slide 25 and mandrel 26 to rotating rocker arm 81 in a clockwise direction moving backer 95 to the right out of engagement with conveyor 53. As conveyor 53 moves to the left and backer 95 moves to the right spring clips 5 6| in contact with the tube blank on mandrel 30 may yield, rotating base 60 in a clockwise direction as seen. in Fig. 4 and anticlockwise as seen in Fig. 11 against the action of spring 65 and allowing the tube blank on mandrel 38 to 10 ride over spring clips 6I and out of conveyor 53. As soon as conveyor 53 has cleared the tube blank on mandrel 30, spring 85 rotates base 60 in a counterclockwise direction as in Fig. 4 and tclockwise direction in Fig. 11 moving spring clips 5 6I back to their normal position. Piston 35 moves to the left until conveyor 53 is under the delivery orifice at which time arm 61 engages stop,nut 69 on rod 68 and further movement to the left is prohibited'and at the same time a tube blank drops into carrier 53 from the delivery orifice.

Meanwhile mandrel slide 29 has continued its movement to the right moving mandrel 30 with the tube blank mounted thereon to the right into engagement with and through the die surfaces I01 and III successively drawing the tube blank out into a tube of the desired length and thickness. As the outer end of the finished tube leaves die surface III it engages entering surface I20 of the stripper H3 and moves therethrough expanding elements H4, H5 and H6 against the action of elastic ring I I8'as shown in Fig. 5. As the inner end of the finished tube starts through the stripper II3 cone-shaped die I2I carried by shoulder I22 of mandrel slide 29 engages the open end of the tube blank in the conveyor 53 beneath the delivery orifice and as the inner end of the finished tube passes through the stripper II3, die I2I enters the open end of the tube blank flaring the open end thereof.

When the inner end of the finished tube has passed through stripper I'I3 elastic ring II8 brings elements H4, H5, H6 back to their normal position behind the end of, the tube as seen in Fig. 6.

As piston I6 moves to the right (Fig. 2) moving mandrel slide 29 to the right as above described, it has likewise moved piston rod I1 and mandrel slide 25 to the right into engagement with the left end of slide rod I65 moving slide rod I65 to the right and as the end of the sure through pipe I63 to the lower side of threeway valve I43 to operate three-way valve I43 to allow fluid under pressure to pass from pipe I42 through pipe I5I into the right side of cylinder I5 to move piston I6 to-the left, the fluid 0 in the left side of cylinder I5 exhausting through pipe I 50, three-way valve I43, pipe I52 and pipe I46 into reservoir I25. Movement of piston I6 to the left moves mandrel slide 29 and mandrel 30 to the left, the end of the finished tube on 65 mandrel 30 engaging the stripper H3 and allowing mandrel .30 to be drawn from the finished tube, the finished tube thereafter falling into any suitable conveyor or carton. Movement of mandrel slide 29 to the left moves rod I85 to the left and finger I84 thereon engages operating handle ]86 of pilot valve I19 rotating it and placing pilot valve I19 in its original position closing both pipes I and NH.

F Movement of piston I6 to the left moves pisaaeaooo the left. Motion of mandrel slide 25 to the left carries with it rod I16, fingers I'll and I" thereon engaging operating handle ill of pilot valve ill to supply fluid under pressure to cylinder I24 in exactly the-same manner as above described with reference to cylinder 34, feeding assembly I23 and die assembly 2| operating in exactly the same way as above described with refergnce to feeding assembly 3| and die assembly 2 .v

As mandrel slide 29 moves to the left, it engages the right end of slide rod I65 moving it to the left until finger I66 engages operating handle 58 of pilot valve ISI, at which time the drawn tube on mandrel 26 has passed through the stripper of die assembly 2|, operating pilot valve l6! to pass fluid under pressure through pipe I62 to the top of three-way valve Ito operate three-way valve I43 to allow fluid under pressure to pass from pipe I42 through pipe ISO to the left side of cylinder' l to move piston It to the right moving mandrel slide 25 combination of a piston, a mandrel operated by said piston, a die cooperatively arranged with respect to said mandrel, automatic hydraulic means and mandrel 26 to the right stripping the flntrolled action of a reciprocating piston drawing a tube in either or both halves of its reciprocating cycle, the piston operatingnovel mandrel carriers, novel means being actuated by the piston to flare the open ends of the tube blanks before the mandrels enter the tube blanks, and

novel feeding means being provided to holdthe tube blanks while their open ends are being flared. Then automatically and in proper sequence in the operating cycle, the tube blanks are moved into position and held for engagement with the mandrels, novel means being provided to assist the tube blank feeding means in holding the tube blank during the insertion of the mandrel, and tube blanks are then drawn in novel die assemblies provided with novel means for stripping the drawn tubes from the man drels, the entire operation being automatic in properly timed sequence and being capable of being manually stopped at any stage of the operating cycle and manually started thereafter recommencing operations at the point where stopped. It is also now apparent that the automatic tube drawing press of the present invention is simple in construction, durable, eflicient, easily operated, and inexpensive to manufacture and maintain. While preferably drawing a blank at each stroke in both directions, it is apparent that the blank-feeding and drawing means may be omitted at one end of the machine so that if preferred blanks are drawn in one direction only.

To those skilled in the art changes to or modification of the above described illustrative embodiment of my novel automatic tube drawing press will now be apparent without departure from the inventive concept of the present invention. To determine the scope of the present invention reference should be had to the appended piston, a die cooperatively arranged with respect to said mandrel, a source of tube blanks, means actuated by said piston for removing tube blanks from said source and transferring the same into for reciprocating said piston and forcing said mandrel through' said die, a source oftube blanks, and feeding means automatically operated by the reciprocation of said piston for transferring tube blanks in succession away from said source and into alignment with said mandrel before said mandrel enters said die.

4. In an automatic tube drawing press the combination of a piston, a mandrel operated by said piston, a die cooperatively arranged with respect to said mandrel, automatic hydraulic meansv for reciprocating said piston and forcing said mandrel through said die, feeding means automatically operated by the reciprocation of said piston to feed tube blanks to said mandrel before said mandrel enters said die and means operated by the reciprocation of said piston to flare the open ends-of the tube blanks before the tube blanks are fed to said mandrel.

,5. In an automatic tube drawing press the combination of a piston, a mandrel operated by said piston, a die cooperatively arranged with respect to said mandrel, stripping means for said mandrel operatively arranged with respect to said die, automatic hydraulic means for reciprocating said piston and forcing said mandrel through said die and said stripping means, feeding means automatically operated by the reciprocation of said piston to feed tube blanks to said mandrel before said mandrel enters said die, and means operated by the reciprocation of said piston to flare the open ends of the tube blanks before the tube blanks are fed to said mandrel.

6. In an, automatic tube drawing press the combination of a piston, a mandrel operated by said piston, a die cooperatively arranged with respect to said mandrel, automatic hydraulic means for reciprocating said piston whereby when said piston is reciprocated said mandrel is forced through said die, a source of tube blanks, transfer means for receiving. tube blanks in succession from said source, and means for reciprocating said transfer means between positions in alignment with said source and said mandrel, said transfer means being automatically operated b the movement of said piston.

'7. In an automatic tube drawing press said piston, a die cooperatively arranged with respect to said mandrel, automatic hydraulic means for reciprocating said piston, a hopper for tube blanks, a slide for receiving blanks from said hopper and conveying the same into alignment with said mandrel, and means automatically operated by the reciprocation of said piston to operate said slide. 1

8. In an automatic tube drawing press the combination of a piston, a mandrel operated by said piston, a die cooperatively arranged with the combination of a piston, a mandrel operated by g respect to said mandrel, automatic hydraulic means for reciprocating said piston and forcing said mandrel through said die, a source of tube blanks, transfer means for conveying tube blanks into alignment with said mandrel and means automatically operated by the reciprocation of said piston to feed tube blanks from said source to said'transfer means'and operate said transfer means before said mandrel enters said die.

9. In an automatic tube drawing press the combination of a piston, a mandrel operated by said piston, a die cooperatively arranged with respect to saidmandrel, automatic hydraulic means for reciprocating said piston and forcing said mandrel through said die, transfer means for conveying tube blanks into alignment with said mandrel and automatically operated by the reciprocation of said piston to feed tube blanks to said mandrel before said mandrel enters said die, and means operated by the reciprocation of said piston to flare the open ends of the tube blanks before the tube blanks are fed to said mandrel.

10. In an automatic tube drawing press the combination of a piston, a mandrel operated by said piston, a die cooperatively arranged with respect to said mandrel,- stripping means for said mandrel operatively arranged with respect to said die, automatic hydraulic means for reciprocating said piston and forcing said mandrel through said die and said stripping means, transfer means for conveying tube blanks into alignment with said mandrel and operated by the reciprocation of said piston to feed tube blanks to said mandrel before said mandrel enters said die, and means operated by the reciprocation of said piston to flare the open ends of the tube blanks before the tube blanks are fed to said mandrel.

11. In an automatic tube drawing press the combination of a piston, a slide operated by said piston, a mandrel mounted on said slide, a die cooperatively arranged with respect to said mandrel, a source of blanks disposed laterally of 'the axis of the mandrel, tube blank conveying means mounted to reciprocate between said source and a position in which a blank carried thereby is aligned with said-mandrel, and automatic means operated by said slide for reciprocating said piston and operating said conveying means.

12. In an automatic tube drawing press the combination of a piston, a slide operated by said piston, a mandrel-mounted onsaid slide, a die cooperatively arranged with respect to said mandrel, automatic hydraulic means operated by said slide for reciprocating said piston, a source of blanks disposed laterally of theaxis of the mandrel, tube blank conveying means mounted to reciprocate between said source and a position in which -a blank carried thereby is aligned with said mandrel, and automatic hydraulic means operated by said slide for reciprocating said conveying means.

. 13. In an automatic tube drawing press the combination of a piston, a slide operated by said piston, a mandrel mounted on said slide, a die cooperatively arranged with respect tosaid mandrel, automatic hydraulic means operated by said slide for reciprocating said piston and said slide and forcing said mandrel through said die, a source of blanks disposed laterally of the axis of the mandrel, tube blank conveying means mounted means, and automatic means operated by said slide for operating said releasing and conveying means.

14. In an automatic tube drawing press the combination of a piston, a slide operated by said means operated by said slide for reciprocating said conveying means, and means mounted on said slide to flare the open ends of the tube blanks before the tube blanks are fed to said mandrel.

15. In an automatic tube drawing press the combination of a piston, a slide operated by said piston, a mandrel mounted on said slide, a die cooperatively arranged with respect to said mandrel, stripping means for said mandrel, automatic hydraulic means operated by said slide for reciprocating said piston and said slide and forcing said mandrel through said die and said stripping means, a source of blanks disposed laterally of the axis of the mandrel, tube blank conveying means mounted to reciprocate between said to reciprocate between said source and a position in which a blank-carried thereby is aligned with said mandrel, means for releasing blanks indiyidually from said source to said conveying source and a position in which a blank carried thereby isaligned with said mandrel, automatic hydraulic means operated by said slide for reciprocating said conveying means, and means mounted on said slide to flare the open ends of the tube blanks before the tube blanks are fed to said mandrel. v

16. In an automatic tube drawing press including, a piston reciprocating in a cylinder, a mandrel actuated by the piston to force tube blanks through a drawing die, t'ube blank feeding means for said mandrel and a second piston reciprocating in a cylinder to operate said tube blank feeding means, a source of fluid under pressure, an automatic valve in communication with said source of fluid under pressure and with each side of said first named cylinder, a pilot valve automatic-ally operated by the reciprocation of said first named piston in conmiunication' with said automatic valve to operate said automatic valve to control the flow of fluid to each side of said first named cylinder and a second pilot valve in communication with said source or fluid under pressure and with each side of said second named cylinder and operated by the reciprocation of said first named piston to control the flow of fluid to each sideof'said second named cylinder to operate said tube blank feeding means.

17. In an automatic tube drawing press including a piston reciprocating in a cylinder, a mandrel on each, side of and operated by said piston to force tube blanks througha drawing die cooperatively arranged with respect to each mandrel, tube blank feeding means for each mandrel, and a piston reciprocating in a cylinder for each of said tube blank feeding means to operate said tube blank feeding means, a source of fluid under pressure, an automatic valve in communication with said source of fluid under pressure and with each side'oi said first named cylinder, 8, pilot valve automatically operated by the reciprocation of said first named piston in communication with said automatic valve to operate said automatic valve to control the flow of fluid to each side of said first named cylinder and a pilot valve for each of said second named cylinders in communication with said source of fluid under pressure andwith each side of said second named cylinders and operated by the reciprocation of said first named piston to control the flow of fluid to each side of said second named cylinders to operate said tube blank feedingoperate said tube blank feeding means, a source of fluid under pressure, an automatic valve in communication with said source of fluid under pressure and with each side of said first named cylinder, a pilot valve automatically operated by the reciprocation of said slides in communication with said automatic valve to operate said automatic valve to control the flow of fluid to each side of said first named cylinder and a pilot valve for each of said second named cylinders in communication with said source of fluid under pressure and with each sideof said second named cylinders and each operated by the reciprocation of said slide-adjacent thereto to control the flow of fluid to each side of said second named cylinders to operate said tube blank feeding means in properly timed relation with the movement of said mandrels.

19. In an automatic tube drawing press the combination of a piston, a mandrel operated by said piston in the reciprocatory cycle of said piston, a die cooperatively arranged with respect to said mandrel, a source of tube blanks, means for feeding tube blanks to said mandrel including means for releasing tubes individually from said source and then transporting the same into alignment with said mandrel, and automatic hydraulic means for reciprocating said piston and actuating said feeding means.

20. In an automatic tube drawing press the combination of a piston, a mandrel operated by said piston in the reciprocatory cycle -of said piston, a die cooperatively arranged with respect to said mandrel, automatic hydraulic means for reciprocating said piston, a source of tube blanks, means for feeding tube blanks to said mandrel including means for releasing tubes individually from said source and then transporting the same into alignment with said mandrel, and means automatically operated by the reciprocation of said piston for intermittently actuating said tube feeding means.

21. In an automatic tube drawing press the combination of a piston, a mandrel operated by said piston in the reciprocatory cycle of said piston, a die cooperatively arranged with respect to said mandrel, automatic hydraulic means for reciprocating said piston and forcing said mandrel through said die, a source of tube blanks, and feeding means automatically operated by the reciprocation of said piston to feed tube blanks to said mandrel before said mandrel enters said die, said feeding .means including a rotatable member for displacing tube blanks individually from said source and a slide for transportating the displaced tube blanks into alignment with said mandrel.

22. In an automatic tube drawing press the combination of a piston, a mandrel operated by said piston, a die cooperatively arranged with respect to said mandrel, automatic hydraulic means for reciprocating said piston and forcing said mandrel through said die, hydraulically operated feeding means automatically operated by the reciprocation of said piston to feed tube blanks to said mandrel before said mandrel enters saiddie and means operated by the reciprocation of said piston to flare the open ends of the tube blanks before the tube blanks are fed tosaid mandrel.

23. In an automatic tube drawing press the combination of a piston, a mandrel operated by said piston, a die cooperatively arranged with respect to said mandrel, a source of tube blanks; automatic hydraulic means for reciprocating said piston and forcing said mandrel through said die, and feeding means automatically operated by the reciprocation of said piston to feed tube blanks to said mandrel beforesaid mandrel enters said die, said feeding means including a slide for transporting tube blanks from said source I into alignment with said mandrel and means operated by said slide to release a tube blank from said source at each return of said slide to said source.

'24. In an automatic tube drawing press including a piston reciprocating in a cylinder, one or more mandrels actuated by the reciprocation of the piston to force tube blanks through drawing dies and a source of fluid under pressure, tube blank feeding means for each mandrel for feeding tube blanks to the mandrels before the mandrels enter the drawing dies comprising a hopper having a downwardly directed delivery orifice, a carrier mounted for reciprocation beneathsaid orifice and a second piston supplied from a source of fluid under pressure and controlled by the reciprocation of the first named piston to reciprocate said carrier.

25. In an automatic tube drawing press including a piston reciprocating in a cylinder, one or more mandrels actuated by the reciprocation of the piston to force tube blanks through drawing dies and a source of fluid under pressure, tube blank feeding means for each mandrel for feeding tube blanks to the mandrels before the mandrels enter the drawing dies comprising a hopper having a downwardly directed delivery orifice, a carrier mounted for reciprocation beneath said orifice, means operated by said carrier for displaying a tube blank-from said hopper. and a second piston supplied from a source of 'fluid under pressure and controlled by the reor more mandrels actuated by the reciprocation of the piston to force tube blanks through drawing dies and a source of fluid under pressure, tube blank feeding means for each mandrel for feeding tube blanks to the mandrels before the mandrels enter the drawing dies comprising a hopper having a downwardly directed delivery orifice, a carrier having a. closed end, an open side and resilient means closing said open side mounted for reciprocation beneath said orifice and a second piston supplied from a source of fluid under pressure and controlled by the reciprocation of the first named piston to reciprocate said carrier.

:27. In an automatic tube drawing press including a piston reciprocating in a cylinder, one or more mandrels actuated by the reciprocation of the piston to force tube blanks through drawing dies and a source of fluid under pressure, tube blank feeding'means for each mandrel for feeding tube blanks to themandrels before the mandrels enter the drawing dies comprising a hopper having a downwardly directed delivery orifice, a carrier mounted for reciprocation beneath said orifice, a second piston supplied from a source of fluid under pressure and controlled by the reciprocation of the first named piston to reciprocate said carrier and a backer actuated by said second named piston to assist said carrier when the mandrel enters the tube blank insaid carrier.

28. In an automatic tube drawing press including a piston reciprocating in a cylinder, one or more mandrels actuated by the reciprocation of the piston to force tube blanks through drawing dies and a source of fluid under pressure, tube blank feeding means for each mandrel for feeding tube blanks to the mandrels before the mandrels enter the drawing dies comprising a hopper having a downwardly directed delivery orifice, a carrier having a closed end, an open side and resilient means closing said open side mounted for reciprocation beneath said orifice, a second piston supplied from a source of fluid under pressure and controlled by the reciprocation of the first named piston to reciprocate said carrier and a backer actuated by said second named piston to assist said resilient means when the mandrel enters the tube blank in said carrier.

JEAN V. GIESLER.

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Classifications
U.S. Classification72/346, 72/348, 221/184, 221/233, 72/453.18
International ClassificationB21C1/16, B21C1/26
Cooperative ClassificationB21C1/26
European ClassificationB21C1/26