US1773812A

US1773812A - Metal-bending machine

Info

Publication number: US1773812A
Application number: US338400A
Authority: US
Inventors: Walter L Fry
Original assignee: WIL FRY CORP
Current assignee: WIL FRY CORP; WIL-FRY Corp
Priority date: 1929-02-08
Filing date: 1929-02-08
Publication date: 1930-08-26
Anticipated expiration: 1947-08-26

Description

Aug. 26, 1930.- w. L. FRY

METAL BENDING MACHINE Filed Feb. 8, 1929 3 Sheets-Sheet 1 mmvrox.

Aug Q26, 1930. w. L. FRY

IETAL BENDING MACHINE Filed Feb. 8, 1929 3 Sheets-Sheet 3 1 JNKENTOR. /@w: i \f B Y 7 ATTORNIQYS.

Patented Aug. 26, 1930 UNITED STATES PATENT f orricr.

WALTER L. FRY, OF soARsDALn, NEW YORK, ASSIGNOR, BY MESNE *AssIGN'MEnTs, TO WIL-FRY'CORPORATION, OF NEW YORK, N. A CORPORATION or DELAWARE METAnBnNnING MACHINE Application filed February 8,1929. Serial r0. 338,400.

My invention relates to improvements in machines for bending metal, and the object of my invention is to produce a simple machine which will bend metal to the desired shape,

5 and do the work in such a manner that there will be no reaction and'the bent metal will stay'in the exact'form or shape to which. it is bent. In machinesoif this character there has been much difiiculty in doing work with it sufficient accuracy, because frequently the metal after being bent will spring back to acertainextent, and sometimes it is bent to a greater extentthan required to allow'for I this reaction, but obviously in such cases the 15 work is'inac'curate.

My invention is providedwith stock gripping'means by 'whichthe stock is crimped or broken down to a certain extent so'that the reactionary effect is destroyed, and when this crimping or breaking down means is followed along the metal in the shape to which it is to be bent, the metal will'stay to the exact curvature'or shapeto which it is bent. My

invention is further intended to produce a simple'and accurate means for carrying out the aforesaid work, and'to this end it comprises a cam track of the desired shape, and carriages moving along the guide track and carrying the crimping or} gripping rollers stxso that the movement of the gripping rollers bodily will give the shape to the metal, and their gripping or" criinping action on the metal will break it down to prevent reaction as stated.

My invention is further intended to provide simple and reliable means for actuating and guidingthe rollers, and'i'or permitting the guiding rollers to pass freely but without loss of direction around the curves of the cam track.

nr 11d Reference is to behad tothe accompanyk ing drawings forming a part of this specification', in which similar reference characters 1ndicate corresponding parts in all the views.

Figure 1 is a plan view of the machine embodying my invention. v a Figure 2 is a side elevation thereof. 1 Figure 3 isabroken sectional Plan 1 the 116 5 -3 of. Figure 5, r

Figure 4 is a broken detail plan of one of the carriages and the gripping rollers.

Figure 5 Figure 8.

Figure 6 is an exaggerated diagram showing the effect of the gripping rollers on the stock..

Figure 7 is a detail planet the'clamp for holding the stock against endwise movement.

Figure 8 is a sectional plan similar to Figure 3- but showing the guide rollers and carri'age in more advanced position. i

clamp, and

Figure is a section on Figure 5. c

The machine has a bed 10 of any usual type, and on this is pivoted'a swinging member 11,

Figure 9is a sectional elevation of the stock'- theline 10-10of is a section on the line 55 of this moving" parallel with the plate and be ing ,pivotedat one end as shown at 12, and

its free end it is provided with'a handle 11, so that the

parts

11 and 13 really actas a lever and carry the, stock gripping and bending movable parts as presently describe V V In shaping the metal a cam track is used,

and one cam member 13 is given the shape to which the metal is desired to be bent. It can.

be fastened to the bed 10 in anyconvenient way, as for example by studs lat which space it from'the bed. The other side of the cam trackis formed by a guide member 15 which is for the most part the same shape as the member 18, and is where the bending of metal occurs of exactlythe same shape. This member 15 is reduced at one end as shown at 15 .to permit the easy introduction of the metal, as hereinafter described, and the part 15, merges into the part, 15through an in-; clined shoulder 17whi'ch serves to force one of thegripping rollers against the metal,

and fromthe shoulder 17 to the right hand end looking at Figure lot the member 15, said memberand the member 13 are of the same shape and are parallel.

The gripping rollers for shaping and breaking down and crimping the stock are preferably arrangedin sets, and are triangularly disposed so that one roller will be m against the stock on a l ne between,

the bearings of the opposite pair of rollers, and this arrangement can be most conveniently carried out by means of a carriage or carriages 18, at least two being preferably employed. As illustrated each. carriage comprises spaced upper and

lower plates

19 and 20 which are spaced apart and secured by the studs 21 or equivalent means. Each carriage 18 moves along the cam track above described, and to provide for the necessary :lreedom of movement it is connected with the bed 11 by a stud 22 (see Figure which moves in a slot 22 in the bed 11, this slot being transverse of the cam track above referred to.

Each carriage is provided with outer and inner guide rollers 23-23, 2 1-2et shown best in Figures 3 and 8, and the pairs of

rollers

23, 23 and 24, 2 1 have their bearings out of alignment as shown to the end that the rollers may follow accurately without binding and without lost motion the cam member 13. Thus it will be seen that in Figure 3 as the carriage moves along the curve the track member 123 'l'ollowed by the rollers 23, 23' and 2t, while the roller 24; is idle, but as the carri a ge progresses along the curve it will be noticed by reference to Figure 8 that the rollers 2? and 24: follow the traclz member 13, while the roller 241-v is idle. In this way it will be seen that the curve is easily passed by the carriage, and that two rollers on one side of the track member 13 and one on the opposite side are always in engagement with 3 the track and so there is no lost motion, and

yet the track is easily followed. This is further facilitated by the fact that the carriage as a whole can move in and out of the slot 22.

On the upper side of each carriage is a set of

rollers

25 and 26. The rollers 25 engage one side of the stock 35 to be bent, and the roller 26 engages the opposite side, and the rollers are shaped to it the stool: as shown in Figure 5. It will be noted that the roller 26 has its bearings in stagger-ed relation to the bearings of the rollers 25, that is the rollers are triangular-1y disposed, and when the roller 26 is forced against the stock, it has a tendency to break down or crimp the stock between itself and the rollers 25. which is shown in an exaggerated way in Figure 6. This action is very slight, but it is enough to alfect the grain of th metal. and to break it down to the extent of pre venting its reaction after it has been shaped, and as the

gripping rollers

25 and 26 are forced along the stock in the desired path. that is the path of the cam track. the metal is continuously broken down and curved, and when it is finished there not the slightest reactionary spring.

To provide for the above breaking down or crimping action, the roller 26 is mounted in movable relation to the stock between it and the rollers 25. and one convenient way is to have it on a slide plate 27 which moves in a. way 28 in the top plate of the carriage (see Figures 5 and and to effect this action the slide plate 27 has a roller 29 which runs along the track member 15.

By referrin to Figure 1 it will be seen that when the carriage is in its initial position with the roller 29 behind the shoulder 17, that is opposite the reduced part of the member 15, there will be sufficient clearance for the stock to be threaded through between the rollers and 26, but as the member 11 is swung forward, the rollers 29 will successively ride upon the shoulder 17, and then is constantly pressed inward to the desired extent by the track member 15.

Before the stock can be bent it must be held against endwise movement, and a convenient means for accomplishing this is shown. in Figures 7 and 9. The plate 30 is mounted on studs 31 on the bed 10 so as to be at the right level, and on this plate is pivoted ec centrically a cam 32 operated by a handle 33 and adapted to impinge the stock between the member 32 and an abutment block 34-.

lVhen the machine is to be used, the member 11 is swung back to the left as seen in Fig ure 1., so as to bring the rollers 29 in advance of the shoulder 17, and the stock 35 is threaded. through between the

parts

32 and 34, and between the

gripping rollers

25 and 26. The stock is pushed tl'n'ough to the desired extent, after which the stock is clamped by the cam 32, and the operator by means of the handle 33 swings the lever member 11 to the right. As this movement proceeds, the carriages '18 ill follow the contour of the cam track by reason of the

guide rollers

23, 23, 24 2 1 as already described, while as the rollers 29 ride over the shoulder 17 they will cause the gripping rollers 25 and 28 to grip and crimp the metal or stock 35, and as the lever 11 is moved around, the carriages will cause the metal to be bent to the path followed by the carriages, and the crimping action will take place sin'iultaneously as already described.

It is quite obvious that the member 1]. might be moved by mechanical power other than manual, and that many details of the structure might be changed without affecting the principle of the invention.

I claim l. A metal bending machine comprising a cam track of the shape to which the metal is to be bent, triangularly disposed stool; gripping rollers impinging on opposite sides of the stock, and means for moving the rollers along the stock and along the cam track.

2. A stock bending machine comprising a cam track of the shape to which the metal is to be bent, triangularly disposed stock grip- 1,. g rollers impinging on opposite sides of tne stock, means for moving one of the rollers against the stock out of alignment with the other rollers, thereby crimping or breaking down the stock, and means for moving the rollers along the stock and along the cam track. I

3. A metal bending machine comprising a cam track of the shape to which the metal is to be bent, triangularly disposed stock gripping rollers, means actuated from the cam track for moving one of the rollers against the stock out of alignment with theother rollers thereby crimping or breaking down the stock, and means for moving the rollers along the stock and along the cam track. I

4. A metal bending machine comprising a set of stock gripping rollers in triangular arrangement disposed to impinge upon the stock, With a pair of rollers on one side the stock and the third roller on the opposite side and disposed between the bearings of the said pair, means for moving the gripping rollers in and out with relation to each other, and means for moving the rollers as a Whole in a path corresponding to the desired shape of the bent metal.

A metal bending machine comprising a cam track of the shape to which the metal is to be bent, triangularly disposed stock gripping rollers disposed to impinge upon the stock Withone roller out of alignment with either of the opposed rollers, means for holding the stock against endwise movement, and means for moving the gripping rollers along the stockand along the cam track.

6. A metal bending machine comprising a cam track formed of spaced members, a set of triangularly disposed stock gripping rollers movable along one track With one of the rollers movable in-and out with respect to the other rollers, means for moving the rollers being out of alignment with either of the first two rollers, and cam actuated means for forcing the individual roller against the stock.

11. A metal bending machine comprising a cam track of the shape to which the metal is to be bent, a carriage movable alongcthe cam track, a plurality of guide rollers on the carriage engaging opposite sides of a part of the track and withthe rollers on one side of the track, advanced with relation to the rollers'on the opposite side, stock gripping members on the carriageacting. to impinge upon the stock, and means carriage along the cam track.

In testimony whereof, I have'signed my name to this specification this5th day of Feb.,'1929.

' WALTER L; FRY.

along one member of the cam track, and means a I actuated by the second member of the cam track for moving the aforesaid individual roller against the stock. s v

7. A stock bending machine comprising a cam track, a carriage movable along the track, guide rollers on the carriage engaging one part of the track, stock gripping rollers l on the carriage, said rollers being tIlflJlglb V larly disposed, two being on one side of the stock and one on the opposite side, means for moving the carriage along the track, and means actuated by a second member of the track for moving the single stock gripping roller against the stock. d v

8. A metal bending machine comprising a. cam trackof the shape'to which the metal is i to bebent, a lever swinging opposite the cam track, and a set of triangularly disposed stock gripping rollers carried by the lever, the said rollers being arranged with fixed bearings for two of said rollers and a mo'vable bearing for the third roller, and means for moving the last named roller against the I stock. A I

9. A metal bending machine according to claim 8, further characterized by having for moving the I