US888727A - Pipe-bending machine. - Google Patents

Description

No. 888,727. PATENTED MAY 26, 1908. o. B. MORTON.

PIPE BENDING MACHINE.

APPLIOATI ON FILED SEPT. 11. 1907. a SHEETS SHEET 1" .q vitwwoeo I aw.

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H llllfli APPLICATION FILED SEPT. 11. 1907.

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CHARLES B. MORTON, OF BUFFALO, NEW YORK.

PIPE-IBEN DIN G MACHINE Specification of Letters Patent.

Application filed September 11, 1907.

Serial No. 392,330.

To all whom it may concern:

Be it known that I, CHARLES B. MORTON, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Pipe-Bending Machines, of which the followin is a specification.

This invention rdlates to the art of bending pipes, tubing and the like, and has for its object to provide an improved machine for bending the work in a convenient and satisfactory manner. It is also proposed to provide for bending the work upon several arcs Without requiring any adjustment of the machine.

Another object of the invention is to have the machine under the complete control of the operator for starting and stopping the mach1ne, and to provide for the automatic reversing of the machine at the completion of each bending operation.

With these and other objects in view, the present invention consists in the combination and arrangement of parts as will be hereinafter more fully described, shown in the accompanying drawings and particularly pointed out in the appended claims, it being understood that changes in the form, proportion, size and minor details may be made within the see c of the claims without'departing from tli the advantages of the invention.

In the drawings,Figure 1 is an elevation of a bending machine embodying the features of the resent invention. Fig. 2 is an enlarged etail top plan view, arts of the table being broken away to disc ose the starting and stopping mechanism. Fig. 3 is an enlarged front elevation of the machine. 4 is a detail sectional view taken through the bending rolls. 1

For the support of the operating parts of the present machine there is provided a table or frame including a top 1 supported upon suitable le standards 2. Risin from the table top a cut midway between its ends adjacent one side thereof is a stub shaft 3 upon which are loosely mounted a series of bending rolls, there being three rolls shown in the present drawings and designated 4, 5 and 6, the said rolls progressing in diameter upwardly, each roll being provided with a peripheral groove. Through the table top there is formed an arcuate slot 7 struck from e spirit or sacrificing any of Fig.

the stub shaft 3 as a center and slightly exceeding a semicircle in length. Working in this slot is a shaft 8 upon which are fixed three bending rolls 9, 10 and 11 which progress in diameter downwardly. These rolls are peripherally grooved and successively bear against the peripheries of the other rolls, the diametric progression of one set of rolls being the reverse of the other set of rolls. The upper ends of the two shafts are connected by a link or bar 12 so as to brace the shafts and maintain the shaft 8 in proper relation to the shaft 3 when the former shaft is working sidewise in the slot 7.

Just beyond the inner endof the slot 7 there is a shaft 13 which depends from the table and carries a crank arm 14, which is in the nature of a cam in which is a slot 15 concentric with the cam and through which is received the lower end of the shaft 8. the shaft 13 is turned so as to swing the crank arm 14 from its position shown in Fig. 2 towards the left hand side of the machine, it is apparent that the shaft 8 will be moved sidewise through the slot 7 around the stub shaft 3 as a center. If a piece of work be thrust into the registering grooves of the cooperating bending rolls, such piece of work will be bent around one of the rolls on the shaft 3 by the movement of the other roll around the shaft .3 as a center.

For the purpose of o crating the shaft 13,

there is a substantially h 16 which extends inwardly beneaththe back of the table and is provided upon its inner end with a beveled gear 17 meshing with a beveled gear 18 carried by the lower member of a clutch 19 upon the shaft 13. As best shown in Fig. 2 of the drawings, it will be seen that the outer end of the shaft 16 is provided with a large gear 20 in'mcsh with a smaller gear or inion '21 upon a power shaft 22, the latter eing provided with loose pulleys 23 and 24 which are driven in reverse directions by any suitable means. Between these pulleys is a clutch 25 capable of being successively thrown into engagement with the pulleys so as to rotate the power shaft 22 in either direction.

In order that the clutch may be conveniently controlled, a push rod 26 is connected thereto and leads horizontally towards and beneath the table where it terminates ina transverse arm 27 extending towards the orizontal drive-shaft- Patented May 26, 1908.

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shaft 22. Suitably hung beneath the table top there is a shaft 28 provided upon its inner end with a cam 29 in coopcrz-ttive relation with the free end of the arm 27 so as to move the push rod 26 endwisc when the cam is rotated in one direction, thereby to move the clutch 25 either to the intermediate position between the pulleys 23 and 24 or into en gagement with the pulley 23. A suitable spring 30 is employed and connected to the push rod 26 so as to exert a tendency to draw the clutch 25 towards the pulley 24.

At the front of the machine and adjacent the floor there is a treadle 31 from which rises a connecting rod 32 having its upper end connected to a ratchet lever 33 fulcrumed u Jon the shaft 28 and engaging a ratchet-wheel 34 carried by the shaft. By Working the treadie 31, the shaft 28 may be rotated so as to rotate the cam 29 and thereby operate the push rod 26.

Working in the arcuate slot 7 there is a trip slide 35, to the under side of which a trip arm 36is connected. Between the trip arm 36 and the front of the table there is a lever 37 fulcrumed between its ends upon theunder side of the table and having its inner end provided with a pin 38 working in a bifurcation 39 in the free end of the trip arm 36. The outer end of the lever 37 is connected to the upper end of a ratchet-lever 39 fulcrumed upon the shaft 28 and engaging a ratchetwheel 40 carried by the shaft 28. When the movablebending rolls have been swung to the left until their shaft 8 enga es the trip slide 35, the latter will be move to the left thereby carrying the trip arm 36 to the left and swinging the inner end of the lever 37 to the left. This movement of the lever 37 operates the ratchet lever 39 which in turn rotates the shaft 28 and causes the cam 29 to work against the arm 27 on the push rod 26 and thereby shift the clutch 25 to a position intermediate the pulleys 23 and 24 so as to stop the machine. It will now be understood that the stop ing of the machine is antomatically contro led, and the trip member 35 may be set to any position in the slot 7 so as to stop the machine when the movable set of bending rolls has moved to any predetermined distance around the stationary set of 011?i thereby to regulate the length of the With the clutch between the two pulleys, the treadle 31 is manipulated to further ro tate the cam 29 so as to. throw the clutch into engagement with the other ulley, thereby to reverse the rotation of the s iaft 13, where by the cam 14, together with the set of swinging rolls, will be swung back to their positions, as shown in Fig. 2, until the free end of the arm 14 strikes an endwise movable bar 41 hun from the table top and connected to a ratchet lever 42 fulcrumed u on the shaft 28 and engaging a ratchet whee 43, whereby the shaft 28 will be rotated so as to turnthecam 29, which in turn will operate the rod 26 to shift the clutch 25 to an intermediate osition out of engagement with the pul eys, whereby the operation of the machine will be sto ped.

n rear of the bending rolls there is a suitable stop-gage 44 which is adjustable towards and away from the rolls and is designed to limit the endwise clutch thrust of the work between the rolls when placing the work in position.

Having thus described the invention, what is claimed is 1. A bending machine having a su )port, a fixed bending roll mounted thereon, t e table having an arcuate slot concentric with the fixed roll, a movable bending roll having a shaft working in the slot, and operating means including a cam working against the shaft of the movable roll to work said shaft throu h the slot.

2. bending machine having a fixed bending roll, a movable bending roll working about the fixed roll, operating means for the movable bending roll, and a trip in the path of the movable bending roll and connected with the operating means to control the same.

3. A bending machine having a fixed bending roll, a movable bending roll working around the fixed roll, operating means for the movable roll, and a movable trip device in the path of the movable bending roll and associated with the operating means for stepping the operationof the machine.

4. A bending machine comprising a table having an arcuate slot, a fixed bending device upon the table, concentric with the slot, a movable bending device working around the fixed device in cooperative relation thereto and guided by the slot, operating means for the movable bending device, and a tri located in the slot in the path of the movab e bending device and associated with the o crating means to stop the movement of tl fe movable bending device.

5. A bending machine comprising a table having an arcuate slot, a fixed bending device concentric with the slot, a movable bending device having an axis guided in the slot, operatin means including a cam working against t e axis to actuate the movable bending device, and a tri located in the slot in the path of the movab e device and associated with the operating means to stop the operation of the machine.

6. A bending machine comprising a table having an arcuate slot, a fixed bending device concentric with the slot, a movable bending device having an axis guided in the slot, operatingL means including a cam working against t c axis to actuate the movable bending device, a trip located in the slot in the path of the movable device and associated With the operating means to sto the operaname to this specification in the presence of tion of the machine, a reversing evice for the 1 two subscribing witnesses. operating means, and a trip device in the i r path of the return movement of the cam and CHARLES MOB 5 associated With the operating means for Witnesses:

sto ping the operation of the machine. MARGARET A. MORTON,

n testimony whereof I have signed my DANIEL J. HURLEY.

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