Stanzmaschine

摘要

981,779. Punching. HOUDAILLE INDUSTRIES Inc. April 7, 1961 [Nov. 1, 1960], No. 40292/64. Divided out of 981,775. Heading B3W. A punching machine includes a frame having a bed and a reciprocating ram, selectively - replaceable, relatively - reciprocable co - operating punch and die tools supported respectively by an upper tool support and by the bed and a pair of connections having separate axes and acting between the tool support and the frame, at least one of the connections being individually detachable and operative to guide the tool support into the position where the tools are in accurate alignment. A punching machine including the upper tool support comprises a C-shaped frame 31 having upper and lower arms 31a and 31b respectively. The lower arm 31b supports a sub-table 50, on which is mounted a work supporting table 33, and also supports a bed 38 on which the lower tool is mounted. A punch and stripper assembly 40 is supported by an upper tool support 41 which is held to the upper arm by clamps 42 and 43. The support 41 comprises arms 41a and 41b and between them is a reciprocating shaft 47 continuously driven by an eccentric 46 and selectively coupled to a ram 44 by an electrically operated clutch of the type described in Specification 890,250. Upper tool support clamping mechanism.- The arms 41a and 41b of the upper tool support are held against the frame 31a by two similar clamps 42 and 43 so that the upper tool is accurately aligned with the lower tool. Each clamp comprises a pivoted hook 157 which engages a pin 158 in a support arm and draws the arm against a locating face on the frame. The hook is operated by lever 155 having a handle 155a and having cam disc 159 which enters a recess in the hook. A plunger 168 on the handle operates a normally open microswitch 171 on the frame when it reaches the closed position. The machine cannot be operated unless both the micro-switches are closed. If either clamp is released the upper tool support can be pivoted about the pin 158 engaged by the other clamp to provide access to the lower tool. An alternative structure. Fig. 3, is provided which is particularly adapted to use small-sized punches. This structure comprises an upper tool support 132 which has arms 132a and 132b extending upwardly on opposite sides of the ram 48 and having a bight portion 132c which receives and slidably supports a punch and stripper assembly 133. The supporting portions of the upper tool supports 132 and 41 are identical.