US1668011A - Automatic feeding and punching mechanism - Google Patents

Description

2 Sheets-Sheet l A. FRIEDMANN AUTOMATIC FEEDING AND PUNCHING MECHANISM Flled May 19, 1924 IIIIIIIIIJ May 1, 1928.

W INVENTOR.

ATTORNEYS.

May 1, 1928. 1,668,011

A. FRIEDMANN AUTOMATIC FEEDING AND RUNCHING MECHANISM Filed May 19, 1924 2 Sheets-Sheet 2 I g -3- l I Hie 4 2 T 17* 1 FF i 43 L L 1 i l l A L I 2s 25 6/ w 1 5 7\ 1 E as 1 35 I l as INVENTOR BY WM ATTORN EYI Patented May 1, 1928.

UNITED STATES PATENT OFFICE.

mnnrrnmnmu, or wYoMIssING, BENNSYLVANIA.

AUTOMATIC FEEDING AND PUNCHING MECHANISM.

Application filed May 19,

My invention relates particularly to automatic feeding and punching mechanism for facilitating quantity production of punched plain and shaped plates for structural and other uses.

My general purpose is to provide for most satisfactorily attaining this obviously im portant purpose, by means of mechanism of simplified construction and operation. To this end my improved mechanism provides for jointly carrying a sample-punched pattern plate; and a blank plate intended to be similarly punched, by means of a common carrier-table to which successive feed movements are imparted under control of an automatic stop-pin mechanism, and in accord with a like controlled selective punch mechanism adapted to operate upon the blank plate during the feed intervals, as herein after fully described in'connection with the accompanying drawings illustrating a preferred embodiment of my invention; the novel features of the invention being clearly defined in the subjoined claims.

Fig. 1 is a side elevation of a mechanism embodying my invention; the view being in the direction of arrow l, Fig. 2, and the punch mechanism at the rear being shown partially in cross-section.

Fig. 2 is a plan view showing part of the punch machine broken away on the line 2-2 of Fig. 1 so as to show the several punch gags.

Fig. 3 is an enlarged cross-sectional view on the line 3-3 of Fig. 1.

The feed table 15 is adapted to jointly carry a pattern plate B provided with any required number of desiredly spaced apertures, and a blank plate C (dotted lines) in which corresponding apertures are to be automatically punched in succession as the blank plate is moved in determined steps under any number of selectively operative punches 10, 10, carried in the reciprocated ram 11 of the punching machine. As shown the blank plate C is suitably secured to the carrier table 15, which directly carries the pattern plate B, by laterally extending table arms 15 pivoted to table brackets 15; the two lates being laid fiat side by side, with the blank plate C in a somewhat higher plane and in advance of the pattern plate as indicated, so that both plates are rigidly carried by the table 15. The plate C only is passed under the punches 10, the pattern plate B passing to one side of the latter an 1924. Serial 1%. 714 378.

der a stop mechanism which properly limits the successive feed'movements of the carrier table 15 as hereinafter fully described.

As illustrated, D indicates a punchingmachine frame having its bed providedwith a changeable die block d, and with a series of anti friction rolls 16, 16 upon which the blank plate C is moved by the laterally extended carrier table 15. The mam portion of carrier table 15 is provided with wheels 20, 20 which run on parallel tracks21, 21 forming part of an annex frame 23 arranged in fixed relation to the punching machinel The joint step-bystep feeding movement of the pattern and blank plates is effected, as shown, by a friction-connection 25 having 'adjustably-tensioned slide plates 25, 25,-

frictionally engaging the opposite sides, of

- a depending longitudinal rib 15* of the carrier table 15; to which conn'ectiona' regular reolprocating movement is imparted in. a suitable guideway 23 (Fig. 3) on the annex frame 23, and the frictional tension of plates 25*, 25, being such as to grip and movethe rib 15 when the carrier table is free to move, oito slide freely on said rib 15 when the carrier table is held against movement.

This regular reciprocating movement of the friction-connection 25 is adapted'to impart an lrregular feeding movement tothe. car- 'rier table 15 and its attached pattern plate B and blank plate G, as determined by engagement of one or more stop pins 30, 30,

with successive apertures in the pattern table 15; the stop-pins 30 corresponding with the laterally spaced holes in the pattern B. These stop-pins are vertically guided in the frame portion 23? (Fig. 3), and are normally depressed by separate springs 30?, and

periodically raised by a cam 35 on shaft 36.

This shaft is regularly rotated in synchronism with the reciprocated punch 'ram'll, and is also provided with a feed cam 37 arranged to operate the friction connection 25 through lever 38 and link 39. The eccentric.

after each punching action of the ram 11 and preliminary to the feed movement of the frictional connection 25. The latter movement carries the table 15 and pattern plate B forward under the raised pins, until springs 30 depress certain of the latter into a succeeding pattern aperture.

The raising of the stop pins 30 to release the pattern plate B for the next feed movement of table 15. is made to operate upon av gag mechanism for the series of punches 10. This mechanism. as indicated. is essentially such as has been heretofore employed to determine the opera tiveness of the respective punches. each 50 being laterally slidable in the punch block 51 so as to bring an aperture or recess 52 therein into or out of alinement with a vertically' slidable punch 10 as indicated. and thereby maltethe latter ineffective or effective on a succeeding troke of the ram. I provide that each of the upwardly extending stop pins 20. when raised. shall come into contact with a lever pivoted at 56. so as to cause the opposite end of said lever to swing a gag-contacting lever 57, and thereby inoperatively positioning the corresponding gag 50.

hen the cam projection has passed the forwardly fed pattern plate B will support the pins in raised position until it is stopped by one or more of the pins being automatically lowered into an alined pattern aperture; which lowering relea es the corresponding and permits its spring 53 to an automatically move it so as to make the corresponding punch 10 operative.

The punched plate produced may be an exact duplicate of the pattern plate P) or it may be a structural shape comprising a plate member in which like punehings are made. Both the pattern and blank plates are moved forward by the friction feed device 25 until automatically stopped by stop-pin engagement with the first hole or holes in the pattern plate B, the friction device 25 sliding idly on the table rib 15 for the balance of its stroke. This plate engaging movement of the stoppins sets the corresponding punch gags 50 to cause punching of like holes in the blank plate C as the punch ram descends: during which latter movement the friction-feed connection 25 is idly returned to its starting position. The stop pins are then raised by cam 35 to permit another forward frictionfecd movement, and to set the punch gags 50 into operative position until they are released by automatic reengagement of certain of the pins with the next hole or holes in the pattern plate for the next punching operation; and so on until the corresponding punching of the blank plate is automatically completed. The stroke of the friction feed device 25 is ordinarily greater than the longitudinal spaein of any succeeding holes, but two or more feed strokes may occur without any effective punching action. the complete re 'iroduction of the pattern punchings being in any case effected automatically.

The particular construction illustrated provides for duplicating in the blank plate at each action of the ram. a maximum of three transversely alined apertures in the pattern plate: the spacing of, these being ol'iviously readily varied by r-orrespondiugly changing" the die block 1/ and punch block 51. and the number of pm'urh s and stop pins employed being readily increa ed if required. As conveniently illustrated the reproduction is rcversely punched relative to the placed pattern plate. this merel involving reversal of one or the other plate. The simple means indicated in the drawings for returning the carrier table 15. comprises merely a hand operated pinion-wheel fil arranged in mesh with a tooth d rack til on the longitudinal rih 15 of the carrier table. if. and a hand lever 02 and catch (3?) for holding the stop pins in raised position; and there is no showing of drive connect ons to the punch ram. The feed mechanism comprising the table reciprocating mcans and the stop mechanism for determining its ell'ective action eoincidcntly with the control of the eff ctive punch action. and other features specifi ally described may be embodied in modilied form without departing from th invention as defined in the claims.

il hat I claim is:

1. In combination with a punch mechanism. and plate carrier table; a table-feed mechanism comprising a frictiunally enga 'ed reciprmrative drive connection; and a pattern-engaging stop mechanism compris iugslop-pins adapted to automatically (lelermine the effective feed-movement imparted to the tahle and the selective action of the pn eh mechanism.

2.1Xn automatic feeding and punching mechanism comprising a. common carrier table for pattern-{muched and blank plates; :2 l'rictitiinally engaged reciprocativc drive connection for said table; a stop-pin mech anism adapted to automatically engage and disengage successively presented holes in said pattern plate; punch mechanism for said blank plate; and means controlled by said pattern plate and stop-pin mechanism f r determinedly limiting successive feed ,movements to the earriertablc and simultaneously setting said punch mechanism.

3. In an automatic feeding and punching mechanism comprising a common carrier table for pattern-punched and blank plates, :1 stop-pin mechanism therefor adapted to automatically engage and disengage successive holes in said pattern plate, punch mechanism for said blank plate operatively controlled in accord with said stop-pin mechanism; and a feed mechanism for said carrier table comprising a regularly reciprocated and normally operative frictionally engaged connection inoperatively slidable thereon when said stop-pin mechanism is pattern-engaged.

4. In an automatic feeding and punching mechanism comprising a common carrier table for pattern-punched and blank plates, a punch mechanism provided with punch gags, means for imparting determined feed movements to said table, means for selective ly limiting said feed movements comprising automatically operated stop pins adapted to engage and disengage pattern-apertures in the pattern-punched plate as the latter moves with the carrier, gag positioning means, and mechanical means operatively connecting the gag positioning means and the stop pins, to permit the latter to control the gag positioning means by the aperture engaging and disengaging positioning of said stop pins.

5. In an automatic feeding and punching mechanism, a plate carrier table, a table feeding mechanism comprising a frictionally engaged reciprocative drive connection, a lever attached to said connection, cam actuated means .for oscillating said leveryand a a pattern engaging stop mechanism comprising stop pins adapted to automatically determine the eliective feed movement imparted to the table and the selective action of the punch mechanism. a

6. In an automatic feedin and punching mechanism, a carrier table ior pattern and blank plates, a stop mechanism including movable elements adapted to engage the pattern plate, a common lever for moving all of said elements in one direction, mechanical tioned by said stop pin mechanism, means for disengaging said stop pin mechanism and simultaneously resetting said punch mechanism preliminary to a successive feed movement of the carrier table, means for returning the carrier table to its'initial position, and means for locking the stop pin mechanism in inoperative position.

8. In an automatic feeding and punching mechanism, a common carrier table adapted to support and move a pattern plate and blank plate arranged edge to edge, a transverse frame extending across said table, a rocking leversupported by the frame, punch selecting gags, gag positioning means controlled by said lever, reciprocating stop pins engaging the lever for actuating the latter, a common lever for actuating all of the stop pins in one direction, means for continuously oscillating the last mentioned lever, and continuously operated means for intermittently feedingthe table forwardly.

In testimony whereof I afiix my signature.

ALBERT FRIEDMANN.

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