US1430323A

US1430323A - Device for bending metal rods or tubes

Info

Publication number: US1430323A
Application number: US449815A
Authority: US
Inventors: James N Reynolds
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-03-05
Filing date: 1921-03-05
Publication date: 1922-09-26
Anticipated expiration: 1939-09-26

Description

DEVICE FOR( BENDING METAL RODS 0R TUBES.

N. REYNOLDS.

APPLICATION FILED MAR` 5.192I.

PatentedSept. 26

1922. 2 SHEETS-SHEET l.

TWMIOJE QA M665 1. N. REYNOLDS. DEVICE FOR BENDING METAL RODS 0R TUBES. APPLICATION FILED MAR. 5, 1921. I Ao Patentedsept. 26, 1922.

2 SHEETS-SHEET 2.

gw/IM" ffozazlffr Patented Sept.. 26, i922.

unire m ,l sra.

laf-h 'JAMES N. REYNOLDS, 0F CLEVELAND, OHIO.

DEVICE FOR BENDING METAL RODS OR TUBES.

Application led March 5, 1921. Serial No. 449,815.

Bending Metal'Rods or Tubes, of which the4 "following is a full, clear, and exact description, reference being had to the accompanyinf: drawings.

My invention relates to a device 'for' bending metal rods or tubes, one object' being to provide asimple and eflicient device of this character which shall be made of fewpa'rts 'and'becheap in manufacture. Another object is to providea device which may be readily adjusted to bend rods of various sizes'an'd on various radii. Other objects of Vthe invention'will be apparent in the course of the following descriptiony and the features of novelty ,will be pointed out inthe claims.

In the drawings in which a preferred embodiment of my invention is illustrated, Fig. 1 is a plan view. of the device with the upper casing plate 50 removed; Fig. 2 isa frag- `mentary view of a portion ofFig. 1, showing a guide plate having a curved end of `slightly larger diameter than that shown in Fig. 1; Fig. 3 is a fragmentary section on the line 3-3 of Fil. 1; Fig. Ll is a plan view with a portion of the plate 12 broken awav to show the underlying mechanism in full 1 lines; Fig. 5 is an end view of the device as yillustrated in Fig. 1 and showing it .attached to a standard; Fig'. 6 is a plan view of the device on a smaller scale and showing the completelyy assembled deviceV of the casing plat-e in position.

The device in general `comprises a guideway for lguiding a rod and a member movable transversely of the guideway, one guide member having a curved face adapted to form the rod as the'transversely moving member forces it against the curved end of the guide. Referring more specifically to the drawings and to the different parts by reference numerals, the device as illustrated lcomprises a lower plate 10, which may be provided with end fiange's 11 by means of which a plate 12 be held on the first named plate and spaced therefrom. The "device'is adapted to be suitably attached to ,.astandard,' as shown in Fig. 5, by means of 'the bolts 15 passing'through suitable openings'in the plate 10.

The upper plate 12 has secured thereto a suitable guide means such as the-slides or guides 20, 21. These members have opposed faces forming` a guideway adapted to direct .a rod or tube of metal and the mem- ;ber 20 is provided with a suitable curved end 22. MovableV transversely of the guideway so formed and situated beyond its end is aroll 30, which is adapted when operated to force the rod'in the guideway against the Acurved end 22 of the guide20 as shown in Fig. In the bending of metal rods it is desirable Athat the rod shall be'bent on a radius not less than the radius of the rod and the curved face 22 should therefore be of a radiusat least as lgreat as that of the rod being operatediuoon.` In order to adapt the ymachine for bendingrolls of different sizest show the ,quidemember 2O as readily detachable from the frame. so that it mav be replaced by a guide 'having a suitably formed curved end.

While it is desirablethat'the radius of curvatureshall be at least as frreat as that of the rod, the rod may of course be bent on a larger radius, but in order to form a smooth bend the roll should pass close to the bending ,guide and preferably to arlistance equal to the diameter of thn rod. ln order that the same `guide member mav be adapted for use with different sizes of rods itis therefore necessary thatran adjustment be provided for moving the `ouide relative to the path of the transverselv movable memfber and for this purpose Ihave shown the member 2O as slidably mounted on the plate 12 and guidedy bymeans of undercut'flanfres 16 which extend parallel to the guide face of the member .20` and'serve to hold it against lateral shifting.

ln order to provide a positive means for adjusting the member` 2O towards and from lthe pathrof the roll 30, and for maintainingr .it in adjusted. position l have shown the 'set .screws 17 abutting the edge ofthe rguide 2O and threaded in the flange 18 extendingr transversely of the flanges 16 and suitably secured to the plate 12. l prefer also to provide still further holding; means for the ,Qjuide 20. which is shown herein as consisting of the bolts or screws 19 extending through slots in theA guide 2O `and threaded invr the plate 12. l

By means of .this adjustment,'the end of the `guide may be^brought into proper relation with the pathway of the transversely moving roll 80. ln Fig. 2 1 have illustrated a guide member 20', which has an end of slightly larger radius ot curvature than that ot member 20, shown in F ig. 1. This member corresponds in all other respects with member 20.

rllhe guideway tor the rod should snugly lit the rod in order to insure correct bending thereof, and therefore means should be provided for varying the width ot this guideway. l accomplish this result in the device illustrated by mounting the guide 21 on the guide 2O so that it may be moved transversely thereof, and l show suitable means tor bringing about this adjustment and for holding the plate in adjusted position. rllhe means for accomplishing this result consists of positioning screws 25 which are threaded through a longitudinal flange carried by the guide 2O and which screws abut a side of the guide 21. l may also provide the screws 24 projecting through slots in the guide member 21 and 'threaded in the guide 2O which screws constitute an additional means tending to maintain the guide 21 in position on guide 20. l also show this guide 21 as abutting the end flange on the guide 2O which assists in preventing the disalignment ot the guide member.

lt will be seen, therefore, that the screws 17 and 25, respectively, serve as means to take up the thrust exerted upon the guides 20 and 21, respectively, when the metal rod is being bent by the action ot roll 30, while the screws 19 and the flanges 16 in the case ot guide 20, and the screws 24 and the end -flange on member 20, in the case ot guide 21,

j also assist in holding the guides in position.

ln order to provide protection for the set screws torpositioning the guide members, l prefer to provide a protecting plate or cas?- ing which may be suitably secured to the plate 12 and which has cut away portions to allow access to the guide members and room "for manipulation ot the handle 1 -O, as is clearly shown in Fig. 6. Y

ln order to operate the bending roll 30 with the requisite torce ll show this roll j ournaled at one end in the lever 31 and at its other end in the angle member 32, which may be suitably secured on the lever. rlhe lever 31 is shown as lying between the

plates

10 and 12 and to provide a pivot Jfor this lever, l have shown a pin 33 having reduced ends extending into the

plates

10 and 12 and passingthrough an opening in the lever 31, suitable sleeve bushings 311- being provided to hold the lever in position longitudinally of the pivot member. The roll 30 extends upwar lly through an arcuate slot 14 in the plate 12, having` the pivot point 33 as its center so as to allow the swinging of the roll on this pin as center.

ln order to actuate the lever and roll by a power multiplying mechanism, l have shown the lever as connected by means ot' the link with a lever 1-0 pivoted intermediate ot the

plates

10 and 12 by means of pin s1 in the same manner as the lever 31 is mounted. The linlr 85 is connected to the lever 31 at the point 3G and tothe lever 40 at the point 12, the distance from 83 to 36 being greater than the distance from 411 to 42, whereby the lever 81 will have a smaller angular motion than the lever 410. The outer end of the lever 10 is suitably formed to be grasped by the hand of the operator.

lt will be seen that l have devised a very simple mechanism which is adapted to quickly and smoothly bend a rod, tube or the like. The device consists of very few parts and adjustable mounting' o12 the guide members allows the adjusting whereby the device may operate upon rods of varying sizes,

w iile the ease with which these guides may.

be removed and replaced allows the device to be readily adjusted to vary the radius of curvature formed at the bend of the rods.

My device, by providing positive means tortalring up the thrust on the guides which occurs during the bending` operation, insures the maintenance of these members in correct position so as to cause a smoothbend of the article operated upon. y

While have described a specific` embodiment of the invention it will `be understood that many changes might be made therein, and that various otherforms of device might be constructed embodyingl the principles ot my invention, and the forefroing description is to be taken as illustrating a particular embodiment ol' the invention rather than restricting the charactery and scope of the invention` `lila-ving tlrus described myl invention, l claim:

1. ln a rod bending machine, a trame .having an upper plate, guide members mounted on said plate and itorming a guideway for rods to be bent, there being a slot in said plate adjacent the end oit said guideway, a pivoted member mounted to move beneath said plate and having a bending roll extendthrough said. slot, means for moving said bending roll in the slot to bend a rod held in said guideway, said means including a hand lever pivoted on said trame vand means connecting the hand lever to the pivoted member whereby the lattermay bef actuated.

2. ln a rod bending machine, a base member and an upper plate spaced therefrom, a member pivoted to the base and the plate, an

operating lever pivoted to the base and theplate adjacent said member, a link connecting said member and the lever, an angle bracket secured to said member and having a bearing for a bending roll therein, a bendino' roll fitted in said bearing and havin T its 13o lower portion abutting said member, there being a slot in said plate through which said bending roll projects.

3. In a rod bending machine, a base member and an upper plate spaced therefrom, a substantially triangular shaped member pivoted to the base and the plate, an operating lever pivoted to the base and plate adjacent said triangular shaped member, a link connecting said triangular shaped inember and the lever, an angle bracket secured to the triangular shaped member and having a bearing for a bending roll therein, a bending roll fitted insaid bearing and having its lower portion abutting said substantially triangular shaped member, there being a slot in said plate through which said bending roll projects and a holding' member for material to be bent having an anvil located adjacent said slot, said anvil being movable toward and from said slot whereby bars of different sizes may be bent. v

In testimony whereof, I hereunto aiiix my signature.

JAMES N. REYNOLDS.