US2669276A - Work stop or positioning means for forming and bending machines - Google Patents

Description

Feb. 16, 1954 HUMPHREY 2,669,276

WORK STOP 0R POSITIONING MEANS FOR FQRMING AND BENDING MACHINES Filed Jan.

INVENTOR.

Patented Feb. 16, 1954 WORK ST OP OR POSITIONING MEANS FOR- FORMING AND BENDING MACHINES George A. Humphrey, Kalamazoo, Mich., assignor to General Gas Light Company, Kalamazoo,

Mich.

Application January 30, 1950, Serial No. 141,200

This invention relates to improvements in work stop or positioning means for forming and bending machines.

The main objects of this invention are:

First, to provide a forming and bending machine with a work stop or positioning means which enables the successive forming of a plurality of edge portions of a sheet Without the operator laying down the work and picking it up again.

Second, to provide a stop or work positioning means for a bending or forming machine of the type comprising an anvil jaw member and a coacting reciprocating jaw member which can be readily applied to or embodied in existing and widely used types of machines.

Third, to provide a stop or work positioning mechanism which can be quickly and easily adjusted for positioning work for forming different widths of flanges or other edge conformations on a single piece of work.

Fourth, to provide a work positioning mechanism having these advantages which is entirely automatic in its operation permitting the forming of flanges or the like of difierent widths on the edges of the single sheet.

Fifth, to provide a structure of this character which is entirely automatic in its operation after the stops thereof are once set or positioned.

Objects relating to details and economies of the invention will appear from the description to follow. The invention is defined and pointed out in the claims.

A preferred embodiment of the invention is illustrated in the accompanying drawing, in which:

Fig. l is a fragmentary rear elevational view of portions of a forming or bending machine embodying my invention, the parts other than the stop or positioning means being mainly shown in conventional form.

Fig. 2 is an enlarged fragmentary viewvon a line corresponding to the broken line 22 of Fig. 3. a Fig; 3 is a fragmentary view, parts being shown in section to illustrate structural details.

Fig-4 is a fragmentary view partially in section corresponding to that of Fig. 2 showing the jaw members in closed position. x

In the accompanying drawing I haveillustrated only such portions of a forming or bending machine as are deemed necessary to illustrate a practical commercial embodiment of my invention. Referring to the drawing, I represents a fixed forming jaw member having a lon- 6 Claims. (Cl. 153-21) gitudinally extending V-shaped recess 2 in its face. The coacting jaw member 3 has an A- shaped face 4 adapted to coact with the V-shaped face of the jaw member I. The jaw member 3 is carried by a reciprocating head 5. It will be understood that the actuation of the head is controlled by the operator. However, as machines of this type are in quite extensive commercial use and are known to those skilled in the art the operating mechanism is not illustrated.

It will be understood that the jaw forming member I is supported upon the bed of the machine and that the head 5 reciprocates relative to the bed of the machine. A piece of work is indicated at 6 in operative position for a forming operation. At the rear of and in parallel relation to the forming member I, I mount a shaft 1. In the embodiment illustrated the shaft is supported by brackets 3 mounted directly on the anvil member I by means of bolts 9. The shaft I has axially spaced collars I0 secured thereto to rotate therewith as by means of the keys II. These collars have radial bores I2 internally threaded to receive the externally threaded stop members I3 which are secured in their adjusted positions by means of the lock nuts I4.

In the structure illustrated the stops have angular spacing, the adaptation being designed to permit forming operations on all four edges of a piece of work 5. To hold the shaft in proper position to present its stops in proper relation to the anvil forming member, I provide a ball detent I5 supported in a socket I6 by means of the spring II. The shaft is provided with a keeper collar I8 having keeper recesses I9 at 90 angular spacing and positioned to receive the detent when a pair of the stops are properly positioned relative to the forming jaw I.

The corresponding pairs of stops I3 are axially aligned. These stops may be adjusted radially of the shaft to position the work for forming flanges of the desired width and successively formed flanges may be of different widths. The shaft is rotated one step on each stroke of the head 5. In the embodiment illustrated, this is accomplished by providing the forming member 3 with a rearwardly projecting bracket 20 on which a multiple toothed pawl 2| is pivoted at 22. This pawl coacts with the ratchet wheel 23 on the shaft. The teeth on the pawl and on the ratchet wheel are so arranged that the shaft is rotated on the retracting stroke of the movable forming member. The pawl is yieldably supported by the spring biased thrust member 24 disposed in a bore provided therefor in the arm of the bracket 20. The spring 26 is adjustably supported by means of the threaded abutments 27- see Fig. 3.

With the parts thus arranged the corresponding stops aligned axially of the shaft are adjusted to position the work as. indicated in; Fig. 2 for forming a flange of the desired width. The operator then positions th work as indicated at 6 in proper relation to the anvil jaw and in engage ment with the stops. the control mechanism for thehead 5,. not illus: trated, and the head is actuated to form the flange asindicated at 28 in Fig.4.. The heads is automatically retracted and on the retracting stroke the shaft is rotated to bring another stop or steps into position. The work is thenturned by the operator to present another edge. This is repeated for each edge to be formed. This can be done without laying down the work and picking it up again and it avoids; repeatedhandlins and. minimizesv time.

Applicant i familiar with presses design d to simultaneously perform different shaping opera tions on the same pieceatone-strokeof thepress. However, there are many kinds of work. andquam titles of work which donot ju fy a press of: that character. The applicant's invention; is well ada ted for. eccnomicaleommercial production of work. of. the character'indicated.

Applicant has not attempted to illustrate and describe variou modifications and adaptations which may be desired. for particular work or types of jaws and theiroperative relation as it is believed that this disclosure will enable thoseskilled in'the art to embody or adapt theinventicn as may be desired.

Having thus described my invention. what. I claim as. new and desire tosecure by'Letters Patent is:

I. In a bending machine, the combination of an anvil jaw member. a reciprocating head member provided with a jaw member coacting with said anvil jaw member, .a shaft disposed atv the rear of said anvil jaw member withits axis of. rota tion disposed parallel.thereto,.said shaft havin axially spaced collarsrotatable therewith; certain of said collars having, 90 angularly spacedil'adial threaded bores therein, work stops adjustably threaded in said horse. a ratchet Wheel on. said shaft, a spring biasedpawl on said head member coacting with said ratchet wheel. to rotate the shaft one step on each return stroke-ofv the cross head, and. means for retaining said shaft against rotation intermediate the rotational, movements imparted thereto by said pawl and ratchet wheel.

2,. In a bending. machine, the combinationeof an anvil jaw member, a reciprocating headmember provided with a jaw member coasting with said anvil jaw member, a shaft disposed at the rearof saidanvil jaw member withits axis of rotation disposed parallel thereto, angularly spaced work stops adjustably mounted on. said shaft, a ratchet wheel on said shaft, a spring biasedv pawl on said head member coacting with said ratchet wheel to rotate. the shaft one step on eachiieturn stroke of thecrosshead, and means for retaining said shaftagainst rotation intermediate they re tational movement imparted thereto byv said pawl and ratchet wheel.

The operator then. trips.

3. In a machine of the class described, the combination of an anvil jaw member, a reciprocating jaw member coacting therewith, a shaft disposed at the rear of said anvil jaw member with its axis of rotation disposed parallel thereto, sets of axial- 1y spaced work stops on said shaft, the stops of the sets beingangularly spaced andindependent- 'ly adjustable radially of th shaft, corresponding stops of the sets being aligned axially of the shaft, means for rotating said shaft one step on the retracting stroke of the reciprocating jaw member, and means for retaining said shaft against rotation intermediate the rotational movements imparted. thereto bysaid rotating means.

4. In a-machine of the class described, the combination with a relatively fixed forming member anda coacting reciprocating mounting forming member, a stop shaft rotatively mounted at the rearof said fixed forming member in spaced relation thereto, axially spaced work stop membcrsmounted-on :said shaitin spaced. relationyfor axial. adiustmentrelative toeaoh other andeaoh including a plurality of angularlyspaced stops, the corresponding stops of thev mem ers b in in alignment. and means for rotating said shaft-step bystep in:timed:re1ation,to thereturnistroke of the: reciprocating forming. member to p sition corresponding stopsin operative relation relative to the fixedformins member to facilitate the. nositioning of the work thereon.

5..ln. a machine. of. the class described,- the combination ofv a relatively fixed forming memher and. a coasting reciprocatingly mounted forming member, a stop shaft .rot ably mounted at the rear ofsaid relatively fixed forming momher in s aced parallel relation thereto and with its axis. in approximately the-plane of theface thereof, angularly spaced. workv stops mounted on. said shaft for: independent. adjustment ra dially thereof, and means. for rotatin said shaft ste by step in timed relation tothezaotuationof the? reciprocatingforming member. to successively position the stops inoperativerelation. tothe fixed forming member tofacilitatethe BQSitiQILP ing of the workcthereon.

6. In a. machine of the class described the combination with a relatively fixedsformlngmemher-ands. enacting reciprocating-mounting form ing member, of :a stopmember rotatively mounted at; the rear of said fixed forming. member with its axis of rotation'in spaced parallel; relation thereto, said stop member having a plurality. of angularly spaced stops and meansufor rotate ing said stop member step by step. intimedrelation to the actuation of the reciprocatin forming member to successively position thestops in operative relation to the fixedforming memher to facilitate the positioning of. the. work thereon;

GEQRGE .A.. HUMPHREY;

References. Gited m the file of this patent. UNITED STATES PATENTS Number Name Date 311,589 Kriete Feb. 3, 1885 1,737,131 Tompkins Nov. 26, 1929 2,208,061 Wargner July 16, 1940. 2,365,196 Hcnegger Dec. 19, 194.4 2,510,768 Williamson June 6, 19 0

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