US408006A - Machine for bending and coiling pipe - Google Patents

Description

(No Model.) 4 Sheets-Sheet If H. E. FOWLER. MACHINE FOR BENDING AND OOIL'ING PIPE.

No. 408,006. Patented July 30, 188.9.

(No Model.) 4 sheets sheet 2.

H. E. FOWLER. MACHINE FOR BENDING AND OOILING PIPE.

No. 408,006. Patented July 30, 1889.

(No Model.) 4 Sheets- 811001; 3.

1-1. B. POWLER, MACHINE FOB. BBNDING AND OOILING PIPE.

No. 408,006. Patented July 30, 1889.

EH5. Pnuwuzho n her. wasmn mk n c.

' (No Model.) 4 sheen sneet 4.

H. 13. FOWLER. MACHINE FOR BBNDING AND GOILING PIPE. No. 408,006. Patented July 30, 1889.

I 7fi ize es ea, W W M@/% Z n PETERS. mlb-umn m m Wahingnm. u: c,

UNITED STATES PATENT OFFICE.

HERBERT E. FOIVLER, OF NEIV HAVEN, CONNECTICUT, ASSIGNOR TO THE UNITED STATES PIPE BENDING AND COIIiING COMPANY, OF CHICAGO,

ILLINOIS.

MACHINE FOR BENDING AND COILING PIPE.

SPECIFICATION forming part of Letters Patent No. 408,006, dated July '30, 1889.

Application filed April 1, 1889. Serial Ito- 3051511. (No model.)

lates to means whereby the pipe is fed for-..

ward to the bending mechanism by whatI designate as a force-feed, in contradistinction to the present methods of feeding the pipe, which operate either by a gripping device applied to the forward end of the pipe or by clamping the pipe to the bending mechanism, (usually a grooved disk,) and thus drawing the pipe forward during the operation of coiling. Features of the mechanical construction whereby I am enabled to feed pipe of soft or thin metal and coil it without injury are gripping-jaws which are of such length as to distribute the strain upon the pipe to avoid crushing, said jaws being caused to engage the pipe, preferably, by toggle-arms pivoted upon a sliding head-block operated by suitable gearing.

Another feature of my invention relates to an adjustable bending roll or die, whereby various-sized coils may be formed without changing the dies, and to novel means for adjusting said roll or die.

Other features will be hereinafter described, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a plan View of a machine embodying my improvements, a fragmentary portion of the driving-pulley being broken away. Fig. 2 is a side elevation. Fig. 3 is a side elevation,

partly in vertical section; and Fig. 4 is a transverse vertical section on line 4 4 of Fig.

1, looking toward the rear of the machine.

Referring to the drawings, 5 represents the table or bed of the machine, which may be of 50 any convenient form and supported upon the pillar 6.

7 is a stud, which is stepped into the table 5 and bears upon its upper end a die or roll 8, having a grooved periphery 8*, within which the coiling is effected.

9 is a guide-plate located at one side of the path of the pipe as it passes to the die 8.

10 is a swinging plate pivoted at its inner end upon the rotatable stud 7. The outer end of said plate has its interior cut away to form guides for a movable block 11, into which is stepped, so that it may rotate, a stud 12, which bears upon its upper end a grooved roll or die 13, which rotates in the same horizontal plane as the grooved die 8, whereby to effect the bending of the pipe between their opposing edges.

14 is a set-screw connected with sliding block 11, and adapted, by being turned, to reciprocate the block 11 and thus to vary the distance between the dies 8 and 13,and thus determining the diameter of coil or bend.

15 is a curved ratchet-plate secured at one end to the swinging frame 10 and adapted to be moved in the manner hereinafter described.

16 16 are gripping-jaws, which are connected by screws 17 to the block 18, which moves in ways 19 of the frame. The aperture of the jaws through which the screws 17 pass admits of a slight lateral movement of said jaws, and the latter are made of such length as to distribute the strain on the pipe sufficiently to prevent crushing or indentation. The block 18 has a slot-and-pin connection, as shown in Figs. 1 and 3, with a short stud 20, projected from the front edge of a sliding block 20, which moves also in the ways 19. A stud 21, projecting from the under face of the block 20, enters a cam-groove 22 of a cylinder 22, secured to rotate with a shaft 23, motion being imparted to the latter by means of the worm-gear 24c, driven by the wormshaft 25, the latter being rotated by power applied to the belt-pulley 26. The block 20 carries on its upper face studs 27 upon which pivoted to the arms 29, which in turn are pivoted upon studs 30, projecting from the face of the block 18. The forward ends of the arms 29 are adapted to impinge upon the sides of the gripping-jaws when the rear ends of said arms are spread by the forward movement of the block 20.

31 is a bar secured to the block 18, and having on its end a dog 32, whose front end is adaptedto engage the teeth of the ratchetplate described, whereby when the block 18 is moved forward the swinging plate 10 will be forced around in the direction of movement.

33 is a guide, preferably in the form of an anti-friction roller mounted in a block 34, which is adapted to be moved in an aperture of the table 5 by means of a set-screw 35 and to be vertically adjusted by means of a setscrew 36, whereby said roller is adapted to support the formingcoil, the first 'turn of which will rest thereon, and to direct said coil above the die 8, as clearly shown in Fig. 2. The lateral adjustment of this guide adapts it to be used with coils of varying sizes, and its vertical adjustment adapts it to form coils of varying pitch, it being obvious that when the guide 33 is elevated more or less the turns of the coil will be more or less open.

The operation of the machine is as follows: A straight length of pipe has its forward end entered between the guide 9 and the die 8, being projected between the curved faces of the'gripping-j aws. Power applied to the pulley 26 will operate through the worm-gearing and cam-wheel described to impart a forward movement to the block 20, the initial effect of which will be to spread the toggle-arms at their rear ends and cause their forward ends to impinge upon the gripping-jaws 16. A further movement in the same direction causes the front edge of the block 20 to impinge upon the rear edge of the block 18, and a forward movement is imparted to the lastnamed block, thereby carrying forward the gripping-jaws and pipe and causing the latter to engage the die 13. If it be desired to bend a coil of the exact diameter of die 8, the plate 10 will be swung around to cause the advancing-pipe to follow closely the periphery ofsaid die under the influence of die 13. WVhenever the plate 10 has been advanced by the action of the dog to a position which will produce a coil of the desired size, said dog will be released, whereupon the plate 10 will be locked. against a retrograde movement by the en gagement of a spring-actuated pawl 10 with teeth 5 on the periphery of the table 5. As the coiling progresses, the pipe is guided by the roller 33, so as to clear the die. It will be apparent that the pipe is coiled at each forward movement of the jaws a distance equal to the movement of said jaws, and the length of this stroke may of course be varied at pleasure. the stud in the cam-slot'will have passed into the return part thereof, thereby effecting the At the close of the working-stroke.

ward, carrying the jaws along the pipe in position for afresh attack.

It will be observed that in the operation of this machine, as hereinbefore described,

the feeding of the pipe forward is eifected by the impingement of the block 20 upon the block 18, and the toggle-arms will be of such length and so arranged and the blocks 18 and 20 will be placed such a distance apart that the gripping effect will not be increased during that part of the forward stroke in which the pipe is being coiled, so that the gripping will be uniform, notwithstanding the fact that the power required with different sizes of pipe or forms of bending mechanism may necessarily be varied.

In the construction as herein shown and described the bending mechanism consists of circular rolls provided with grooved peripheries, which rolls are rotatably mounted, their rotation being effected by the friction of the forwardly-moving pipe; but I do not intend to limit my invention to any particular form of bending mechanism, as it is obvious that the stationary rolls of the form shown or stationary blocks with curved and grooved faces may be substituted therefor. The stationary devices would be objectionable on account of the increased power necessary to force the pipe between them; but with some classes of work this objection would be merely trivial.

I do not'intend to limit my invention to the particular method of reciprocating the gripping-jaws, although the gearing here shown has been found admirably adapted for that pipe between the bending-dies, substantially as described.

2. In a pipe bending or coiling machine, the combination, with suitable bending-dies, of means for forcing the pipe between said dies to form thecoil, said means comprising, in combination, gripping-jaws carried by a sliding block and toggle-arms, and suitable gearing for operating said arms to cause them to impinge upon the gripping-jaws to secure its engagement with the pipe, and means for re ciprocating the block to cause the jaws to ad Vance the pipe, substantially as described.

3. In a pipe-bending machine, the combination, with dies for bending or coiling the pipe, of a pair of grooved gripping-jaws mounted upon a sliding block, a second block adapted to be moved by suitable gearing into engagement with the first, and a system of togglelevers pivotally connecting said blocks and adapted to bear upon said gripping-jaws to cause their engagement with the pipe, substantially as described.

4. In a pipe-bending machine, the combination, with reciprocating clampingjaws for feeding forward the pipe, of a rotatable bending-die, a second bending-die mounted upon a swinging plate, and means, substantially as described, connecting said plate with the feeding mechanism.

5. In a pipe-bending machine, the combination, with reciprocating clamping-jaws for feeding forward the pipe, of a rotatable bending-die, a second bending-die mounted upon a swinging plate, means, substantially as described, connecting said plate with the feeding mechanism, and means for locking said described.

7. In a pipe-bending machine, the combination, with the bending-dies, of a guide for the forming-coils, said guide being vertically adjustable, whereby the pitch of the coils may be varied and laterally adjustable, whereby it is adapted for use with coils of varying diameters, substantially as described.

HERBERT E. FOWLER. WVitnesses:

C. H. HAYDEN, FRANK B. BYING-TON.

Images