| 摘要 |
838,573. Making electrical connectors; shearing; jointing by stamping. AMP Inc. May 9, 1958 [May 31, 1957], No. 14893/58. Classes 83 (2) and 83 (4). A machine for severing a metal strip comprises a shear plate and a shear blade mounted for relative reciprocating movement. to sever the strip on the closing stroke, means. to move the strip axially. so that the severed end projects over the shearing edge of the plate, means to hold the strip against axial and transverse movement after the axial movement and means on the blade to burnish the severed end on the opening stroke. A strip of taper-pin electrical connectors 6 are fed to an anvil 4 where a ferrule-forming portion 8 is crimped about the end of a conductor by a resiliently mounted die 14 carried by a ram 16 reciprocable relative to abase. Spaced shear plates 18, 20 co-operate with a shear blade 22 carried by the ram to shear out a link 30 between the two leading connectors, slightly before the crimping operation but after the portion 8 is lightly engaged by the die 14. The crimping operation causes slight axial extrusion of the connection e.g. 0.015 inch so that the trailing end overhangs the shear plate 18 and extends into a recess 36, Fig. 5, in the shear blade 22. On the upstroke of the ram the camming surface 38 on the shear blade 22 burnishes the end of the crimped connector and bends any burr or stump upwards. During burnishing, the die 14 and a hold-down plate 68 which bottoms on the base are held down by the pressure of springs 60 and 78 and the extent of the burnishing may be adjusted by governing the release of the holding action of the die 14 by means of a screw 52 (not shown). Shoulders are formed in the ferrule-portion 8 during crimping which assist in axially holding the connector during burnishing. |
