US530196A - Machine for bending flanged metal bars - Google Patents

Description

(N0 Model.)

A. J. MOXHAM. MACHINE FOR BENDING PLANGED METAL BARS.

. No. 530,196. Patented Dec. 4, 1894.

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UNITED STATES PATENT retest ARTHUR Jr. MOXHA'M, F JOHNSTOWN, PENNSYLVANIA.

MACHINE FOR BENDING FLANGED METAL BARS.

SPECIFICATION forming part of Letters Fatent No. 530,196, dated. December 4, 1894.

Application filed March 23, 1894. Serial No. 504,893. (No model.)

i To all whom it may-concern.-

' ing at Johnstown, county of Gambria, State of Pennsylvania, have invented a new and useful Improvement in Machines for Bending Flanged Metal Bars, of which the following specification is a true and exact description, due reference being had to the accompanying drawings.

My invention specially relates to a machine for bending that class of beams known as channel-beams, and which are composed of a web member having on each edge a flange angularly disposed to the web.

The object of my invention is to provide a machine adapted to effect a short, sharp bend in a channel, as hereinafter set forth.

In bending channels it is sometimes desirable to bend them by folding together a portion of theflanges While bending the web,-and it is to efiect abend of this character that my machine is adapted.

Referring tothe drawings: Figurel is an end view of a channel of the type described. Fig.

.2 is a side View of the same, the dotted lines showing it after being bent.

Fig. 3 is a perspective view of a channel after being bent in my machine. The fold in the flange shows clearly in this view. Fig. 4 is a top view of the lower die of my machine. Fig. 5 is a front and Fig. 6, a side view of the machine.

A is a die or. former, the top of which is beveled off at the proper angle to form the desired angle in the channel, and which is formed to fit inside the channel when bent.

B is a mating die adapted to fit outside the channel when bent, and operated by any suitable power attached to rod O, the channel being thus pressed into shape between the two dies. Themovable die B is guided by any suitable guides, as the rods 0 on which slide the lugs D. In each side of the lower die is a pocket E, the use of which will be hereinafter explained. V Oppositethese pockets are the fingers F so pivoted at G in block H that they may enter the pockets E and be normally held away therefrom by the springs L. These blocks H are mounted in suitable guides so that they may be slid downward therein. This would compress the spring I which acts to restore the block to its normal position.

In the top die B are inclined slots K which engage the fingers F, and, as the dies come together, these inclines force the fingers in- Ward into pockets E.

The operation of the machine is as follows: The channel being heated and placed in the machine, as shown, the top die descends and the edges M M striking it coin mence to bend it over the apex of the die A. At the same time the inclines K. engage the fingers F and force them inward'against the flanges of the channel (see Fig. 5), and, as the die descends, the fingers continue to force the flanges into the pockets E, thus making the fold shown in Fig. 3. As the fingers, though made as thin as possible, are in the folds of the flange the sides of the fold cannot come close together. Hence it becomesnecessary to withdraw the fingers. To do this I provide on the fingers the lugs N which engage the top die before it is fully down, and, as it descends farther, they are forced down against springs I and withdrawn from the fold in the flange. As they are withdrawn from the fold before the die is fully down and while the channel is still not fully bent, the final bend in the channel closes the two sides of the fold together and thus forms the neat and compact bend show-n in Fig. 3.

The connection 0 may be joined to any suitable power, and the die 13 may be caused to travel in any path which will effect the bending; for instance, it may be connected with a piston rod reciprocating in a straight line, or it may be attached to an arm pivoted at the other end and so engage the bar with a swinging action. It might be desired also to have both dies movable which could be readily done by connecting both directly with suitable power.

The method of performing such bending as herein described, I have described and claimed in an application filed by me March 23, 189A, and bearing Serial No. 504=,892.

Having thus fully described my invention, what Iclaim, and desire to protect by Letters Patent, is g 1. A machine for bending flanged metal bars, consisting of a pair of dies between which the bar is bent, operating mechanism connected therewith and finger bars pivotally mounted'in one die and operated by the other die, in such manner that they are adapted to engage the flanges of the bar and bend them in the manner set forth.

2. In a machine for bending flanged metal bars, in combination with a pair of dies between which the bar is bent, and operating mechanism therefor; finger bars adapted to engage and bend or fold, as described, flanges of the bar, said finger bars being so mounted that they may be withdrawn from the fold for the purpose set forth.

3. In a machine for bending flanged metal bars, in combination with a pair of dies between whieh the bar is bent, and operating mechanism connected therewith; pockets in one die adapted to receive flanges of the bar when bent; finger bars adapted to bend or fold said flanges into said pockets; and blocks in which the finger bars are pivoted, said blocks being so mounted on one of the dies that the finger bars may be Withdrawn from the folds in the flanges before the bar is fully bent.

4. In a machine forbending flanged metal bars, in combination with a pair of dies between Which the bar is bent, and operating mechanism; pocketsin onedieand finger bars normally out of said pockets, the finger bars being so connected and arranged that they are adapted to have amovement inward into said pockets and downward in said pockets.

In testimony whereof I have affixed my signature in presence of two Witnesses.

ARTHUR J. MOXI IAM.

Witnesses:

WM. A. DONALDSON, D. BRYAN.

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