GB715155A - Improvements in or relating to metal punching machines - Google Patents

Abstract

715,155. Punching; electric welding; riveting. PRESSED STEEL CO., Ltd. March 10, 1953 [March 10, 1952], No. 6157/52. Class 83 (4). A metal punching machine comprises a framework supporting one or a plurality of punch bodies having punches operated by a cam or wedge member attached to a roller-type chain driven by manual or power means and constrained to follow a predetermined path. On the framework of a jig, supporting, for example, a vehicle wing in the marginal flange of which holes are to be punched, are mounted a series of punch bodies 11 each having slidable therein a punch 28, of a length which may vary from body to body, on a holder 12. A chain 25, moving along above the series of punch bodies, carries a wedge member 17, an actuating wedge 27 secured to which engages a roller 15 on the punch holder 12 to depress the punch and a return wedge 26, on the member 17, engages a roller 16 on the holder 12 to return the punch to its inoperative position. The wedge member 17 is also formed with guide flanges 18, 19 adapted to engage a roller 14 on the punch body 11 to position the wedge member 17 relative thereto. A resistance welding machine may be operated by chain and wedge as described above, the moving electrode being actuated by the wedge whilst the timer and contactors are driven from the chain. Similarly in squeeze riveting machines having units mounted in line the wedge may depress, in turn, each movable unit ram of the machine.