US 588223 A
Description (OCR text may contain errors)
(No Model.) 2 SheetsSheet I. H. E. FOWLER, Decd.
A. N. FOWLER, Administratrix. PIPE BENDING- MACHINE.
No. 588,223. Patented Aug. 17,1897.
(No Model.) v 2 Sheets-Sheet 2.
E. FOWLER, Deod. A. N. FOWLER, Administratrix. PIPE BENDING' MACHINE. No. 588,223. Patented Aug. 17,1897.
7f eA maww I Attorney g N-rTED STATES PATENT l1 rrrcn.
HERBERT E. FOWLER, DECEASED.
SPECIFICATION forming part of Letters Patent No. 588,223, dated August 17, 1897. 7 Application filed November 3,18%, Serial No. 610,936. (No model.) I
To all whom) it may concern:
Be it known that HERBERT E. FOWLER, deceased, late a citizen of the United States, residing at Naugatuck, in the county of New '5 Haven and State of Connecticut, did invent certain new and useful Improvements in Pipe- Bending Machines; and it is hereby declared that the following is a full, clear, and exact description of the invention, such as will en- IO able others skilled in the art to which it appertains to'make and use the same.
The invention relates to machines forbend- 7 ing pipe, and has for its object to provide a machine of a simple and inexpensive character by means of which an empty or unfilled pipe of any length and of any given diameter can be quickly and easily bent to a true circle or any fractional part thereof or to an irregular circular form, as may be desired, without injury to the material of which the pipe is composed.
To this end the invention consists in the pipe-bending machine constructed and operating as hereinafter fully described, and partioularly pointed out in the claims.
Referring to the drawings, in which like numerals designate like parts in the several views, Figure 1 is a plan view of a machine embodying the invention. Fig. 2 is a side elevation thereof, with one of the guide-rolls shown in cross-section and the traveling head broken off at its front end. Fig. 3 is a crosssection of the bending-roll, taken at line 00 so of Fig. 1, and an end View of the traveling 3 5 head and the stationary mandrel. Fig. 4 is a partial cross-section of the bending-roll and an end view of the traveling head, illustrating a modified form of said parts. Fig. 5 is a detached view of the stationary mandrel. Fig. 6 is a plan View of the bending-roll and the traveling head when used for bending the 'pipe into an irregular circular form. Fig. 7 is a plan View of a portion of the form of travelinghea d shown in Fig. 4.
The numeral 1 designates the base or stand,
and 2 the circular table, of the machine, said table being provided at one side with the tangentially-projecting extension 3 and with the bed-plate 4, overlying a portion of said exten- 5o sion, said base, table, extension, and bed' plate being preferably cast integral with each other.
' At the center of the circular table 2 is located a fixed stud 5, upon which is pivotally mounted the circular. head 6 of a lever 7, which lever projects to a convenient distance beyond the edge of said table and is preferably provided with a shoulder or offset 8 on its under side adjacent to said edge, as shown. Said lever, which is tangential to its head 6, as shown in Fig. 1, is thus rendered capable of movement around the stud 5 as a center. The head 6 of said lever is provided with two upwardly-projecting pins 9 9, located upon opposite sides of the stud 5, (see Figs. 1 and 3,) to receive the bending-roll 10, which roll has a central hole to receive the stud 5 and two oppositely-located holes to receive the pins 9, and is provided with a peripheral grooveill, of a diameter corresponding to that ofthe pipe to be bent. A look-nut 12, applied to the threaded upper end of stud 5, retains the roll 10 against upward'movement while enabling the same to be removed and replaced 1 by others of different sizes, as hereinafter described. The roll 10 thus mounted upon the lever 7 partakes of the movement of the latter in both directions.
Upon the upper side of lever 7, adjacent to its head 6, is mounted a sliding block 13, against the outer end of which bears the end of a screw 14, passing through a threaded hole in an upward projection 15 on the lever, said screw being provided at its opposite end with a suitable hand-wheel, as shown, whereby it can be operated to force the block toward the bending-roll 10. If desired, a swivel connection between the inner end of said screw and the block can be made to cause the'former to move the latter in both directions, but such construction is not regarded as being material, as the block can be readily moved in an outward direction by hand when the screw is retracted. At its inner end the block 13 is provided with a recess to receive a clampingjaw 16', (see Figs. 1 and 2,) which jaw has at its inner end a groove of the same diameter as the groove in the periphery of the bendingroll 10, as shown in Fig. 2. It follows from such construction of the bending-roll and said I00 clamping-jaw 1t that if the end of a pipe having a diameter corresponding to the diameter of the grooves in said parts be inserted be tween them and the jaw be moved to its innermost position and locked in such position by the screw 1% any movement of the lever 7 toward the left will cause the jaw and roll to exert such a binding action upon the pipe as to cause the latter to partake of the movement of said parts about the stud 5 as a center.
The numeral 17 designates a traveling head which rests upon the bed-plate and is free to slide longitudinally thereon, said head having in its side adjacent to the bending-roll 10 and extending throughout its length a groove the diameter of which corresponds to that of the groove in said roll 10, as shown in Figs. 1 and 3. Bearing against the opposite or rear side of said head 17 are two guide-rolls 18 19, which are mounted upon the bed-plate in such manner as to be capable of adjustment toward and away from the plane of the axis of the bending'roll. As herein shown, such adjustment of said guide-rolls is secured by providin g the bedplate with two parallel T-slots 20, which receive the heads of two T-bolts 21, upon which are mounted sleeves 22, about which said rolls revolve, and by applying lock-nuts 23 to the threaded upper end of said bolts, which nuts bear against washers 24, resting upon said sleeves. By loosening said lock-nuts the bolts 21 and rolls 18 19 can be adjusted to any point in the length of the slots 20 to adapt the machine for bending pipe of various diameters.
I11 bending certain grades of pipe it is desirable that a core or mandrel be located within the same immediately to the rear of the point at which the deflection begins, and for this purpose a short mandrel is employed, having a diameter corresponding substantially with the inner diameter of the pipe to be bent, which mandrel is detachably connected to the end of a rod 26, said rod at its opposite end resting in one of a series of open slots 27 in the upturned end of the extension 3 of the table and having at its extreme end a head 2S,which, by bearing against the outer or rear face of said upturned end, prevents longitudinal movement of the rod in a forward direction. As shown in Fig. 5, the mandrel 25 has in its rear end a threaded socket to receive the threaded end of the rod 26, whereby it is rendered readily detachable to enable the same rod to be used with mandrels of various diameters.
The rod 26 is of such length that when its head 28 bears against the outer face of the upturned end of table extension 3 and lever 7 stands in its normal position with the axis of the groove in jaw 16 in alinement with the axis of mandrel 25 the front end of said mandrel will project to or beyond the rear end of the groove in said clamping-jaw.
In the use of the machine thus constructed the lever 7 is moved to its normal position, in
which the axis of the groove in the clampingjaw thereon is in alinement with the axis of the groove in the traveling head 17, and the pipe 20, either with or without the interposed mandrel, is laid upon the bed-plate with its front end inserted between bending-roll 10 and clamping-jaw 16, the latter being held in contact with the periphery of said roll by screw 14. Lever 7 is then moved toward the left, and, its path of movement being the are of a circle, the bending-roll and jaw 16, which move with it, grasp the pipe and cause it to partake of said movement, thus producing the desired bend in the pipe. The traveling head 17, being held in contact with the bending-roll by the guide-rolls 18 19, moves with said roll, but in a rectilinear line, and in so doing affords a firm support to the pipe at the point at which its deflection begins without exerting any drag thereon, while the statiom ary mandrel 25, in case one is used, affords an interior support to the pipe immediately adjacent to the same point. Such movement of the parts is continued until the bend in the pipe reaches the desired part of an .entire circle-for example, a quarter-bend, as shown in Figs. 1 and 2-when the lever 7 is returned to its starting-point and the pipe is withdrawn from the machine.
An adjustable stop 30 on the table, to limit the forward movement of the lever 7, enables any number of pipes to be bent to exactly the same extent without the exercise of any particular care on the part of the operator.
In case it is desired to bend the pipe into a plurality of coils, each forming a complete circle, the handle 7 is moved around to its extreme limit, in which it is parallel with the extension 3 of the table, and is then returned to its starting-point and again moved forward, gripping a new length of the pipe, and so on as long as may be desired.
13y reason of the fact that the jaw 16, bending-roll 10, and traveling head 17 all move in unison with the pipe during the bending operation such operation is performed with but little effort on the part of the operator and without injury to the pipe itself, regardless of the thickness of the metal composing the latter. Furthermore, the necessity of filling the pipe with comminuted material of any kind to preventcompression thereof is thus entirely obviated.
As hereinbefore stated, it is designed to use a series of bending-rolls 10, jaws 16, and travcling heads 17 having grooves of various diameters, to enable the machine to bend pipe of any size, said parts being readily interchangeable on the machine, as hereinbefore described. It is also designed to provide a series of mandrels of correspondin g sizes, to be interchangeably secured to rod 26, the series of open slots 27 in table extension 3 enabling said rod to be shifted transversely of the bedplate to correspond with the various sizes of mandrels. It will be understood that said rod 26 and the extension 3 of the table can be made of any desired length, accordi-u to the length of the pipe which it is I desired to bend on the machine.
4 In the form of the invention shown in Figs.
. 1, 2, and 3 the traveling head 17 receives its movement from the bending-roll by mere frictional contact with the periphery of the latter, which construction amply suffices for the purpose in bending the smaller sizes of pipe. For bending larger pipe it is sometimes desirable to have a more positive engagement of one of said parts with the other,
.and in Figs. 4 and 7 is illustrated one form of .is shown one form of such means for bending irregular forms, in which the bendingroll has the depressed portion 36 in its periphery, and the head 37 has a corresponding offset port-ion 38 in its grooved surface, Whereby a pipe passed between said parts will be bent to the form of the periphery of said roll.
While the head 17 is herein shown as being adapted to move longitudinally with the pipe as the latter is bent, it is possible to bend some grades of pipe successfully without movement of said head, any simple means being employed for fastening it against movement during the operation. It is therefore not desired to restrict the invention to the use of a head which moves in all cases. I
Various other modifications in the detailsv of construction of the machine herein shown and described can be made within the spirit of the invention. v
Having thus fullydescribed the invention, What is claimed, and desired to belsecu red by Letters Patent, is-
1. In a pipe-bending machine, the combination with a revolubly-supported bendingroll having its periphery grooved as described, of a lever connected to said roll for operating the same, agrooved clamping-jaw adjustably supported upon said lever and adapted to form, with the grooved periphery of said roll, a round socket to receive the pipe to be bent, a table located adjacent to said roll, a head mounted upon said table tangentially to said bending-roll and having in the side thereof a groove corresponding to the groove in said roll, and means for adjusting said head upon said table toward and away from the plane of the axis of said bending-roll, substantially as described.
2. In a pipe-bending machine, the'combination with a peripherally-grooved bendingroll, of. a lever rigidly connected to said roll for operating the same, an adj ustable,grooved clamping-jaw on said lever for clamping a pipe in'thepcripheral groove in said roll, a traveling head movable in a plane tangential to said .roll and having in its adjacent side a longitudinal groove corresponding to those in said roll and jaw, and means for holding said head in contact with the periphery of said roll, whereby-the revolving movement of the latter will cause a rectilinear movement of the former, substantially as described.
3. In a pipe-bending machine, the combination with a periperally-grooved bendingroll revoluble about a stationary pivot, of a lever rigidly connected to said roll and carrying an adjustable clamping-jaw the face of which is grooved to correspond with the periphery of said roll, a similarly-grooved trav-' cling head movable in a rectilinear plane which is tangential to the periphery of said roll, and means for transmittingmovement from said roll to said head, substantially as set forth.
4. In a pipe-bending machine, the combination with a grooved bending-roll, of a lever for turning the same about its axis, a clamping-jaw carried by said lever, a traveling head movable in a plane tangential to said. roll, a mandrel located adjacent to the point of contact between said roll and said traveling head, and means for holding said mandrel against movement, substantially as set forth.
5. In a pipe-bending machine, the combination with acircular table, of a lever pivotally connected at one end to said table at the center of the latter, a peripherally-grooved bending-roll detachably secured to said lever and having its axis coincident with the pivot thereof, a grooved clamping-jaw detachably connected to said lever and adapted for movement toward and away from the periphery of said roll, a grooved traveling head movable I in a rectilinear plane, guide-rolls for holding said head in contact with the periphery of said bending-roll, and means for adjusting said guide-rolls to vary their distance from the axis of said roll, substantially as set forth.
6. In a pipe-bending machine, the combination with a table, of a grooved bendingroll centrally mounted thereon, a lever connected to said roll for turning it about its axis, a clamping-jaw carried by said lever, a traveling head actuated by said roll in a plane tangential to the latter, a mandrel, a rod detachably connected at one end to said mandrel, and means for engaging the opposite end of said rod to prevent longitudinal movement thereof, substantially as described.
7. In a pipe-bending machine, the combination with a peripherally-grooved bendingroll and means for turning the same about its axis and for clamping the end of apipe within the groove thereof, of a traveling head movable in a rectilinear plane and having in the side thereof adjacent to said bending-roll a longitudinal groove corresponding to the groove in said roll, and means for holding said head in contact with said bending-roll to cause the latter to impart movement to the former, substantially as described.
8. 'The combination with the grooved bendin g-roll 10, of lever 7 rigidly connected therewith, sliding block 13 mounted upon said lever, screw 14E bearing against the outer end of said block, and grooved jaw 16 detachably connected to the opposite end of said block, substantially as described.
9. The combination with bending-roll 10, lever 7, and clamping-jaw 16, of the traveling head 17, guide-rolls 18, 10, and means for adjusting said guide-rolls to vary their distance from the axis of said bending-roll, substantially as described.
10. The combination with table 2 having the extension 3 provided with the open slots 27, of the bending-roll 10,'lever 7, clampingjaw 16, traveling head 17, mandrel 25, and rod 26 detachably connected at one end to said mandrel, said rod having its opposite end adapted to rest in one of the slots of said table extension and being provided at said end with the head 28, substantially as and for the purpose described.
11. The combination with table 2, of the lever 7 having the head 6 which is centrally pivoted upon said table, said head being provided with the upwardly-projecting pins 9, of the bending-roll 10 provided with holes to receive the pins on said lever, means, as the stud 5 and nut 12 for holding said roll downwardly upon said lever, grooved clampingjaw 16 movably mounted upon said lever, and screw 14 also mounted upon said lever, for
holding said jaw in engagement with the pcriphery of said roll, substantially as described.
12. The combination with table 2, bendingroll 10, lever 7, and its clamping-jaw 16, of the bed-plate 4- provided with the parallel T- slots 20, T-bolts 21 movable within said slots and carrying the guide-rolls 18, 19, and the grooved traveling head 17 resting upon said bed-plate and engaging, at its grooved side, the periphery of said bending-roll and being engaged at its opposite side by said guiderolls, substantially as described.
13. In a pipe-bending machine, the combination with a peripherally-grooved bendingroll and a lever rigidly connected thereto for operating the same, said lever carrying an adjustable, grooved clamping-jaw, of a grooved traveling head movable in a plane tangential to said roll and engaging the periphery of said roll, a mandrel located within the groove in said head and projecting to a point at or beyond the rear end of the groove in said clamping-jaw, when said lever stands in its normal position, and means for holding said mandrel from movement longitudinally, arranged and operating substantially as described.
In testimony whereof I affix my signature in presence of two witnesses.
ADELIA N. FOWLER, Administratriao of the estate of Herbert E.
LEILA M. HoLMEs, GEORGE E. HALL.