METHOD FOR FORMING SOCKET WRENCH HEADS WITH SHAPED CAVITY Russian patent published in 2005 - IPC

FIELD: plastic working of metals, possibly manufacture of heads of socket wrenches of high strength alloy steels.

SUBSTANCE: method comprises steps of cutting off blank, chamfering them for cavities to pressed out and pressing out cavities. In third position by means of upper punch square cross section cavity is pressed out with size of its square side consisting 1.03 - 1.1 of size of square side of ready part. Depth of pressed out cavity is equal to that of ready part cavity. In fourth position with use of upper punch final-size shaped cavity is pressed out in rigid die when blank rests by bottom of its square cross section cavity pressed out beforehand upon cylindrical punch. Diameter of said punch consists 0.94 - 0.98 of minimum size of square of ready part cavity. In description of invention condition is given for pressing out shaped cavity in fourth position. Then blank is successively fed to fifth position for forming outer surface of head.

EFFECT: enhanced quality and strength of ready parts.

1 dwg