PUNCH-AUTOMAT FOR MOULDING OF TUBULAR PARTS Russian patent published in 2009 - IPC B21D22/02 

FIELD: metallurgy.

SUBSTANCE: invention relates to metal deformation process and can be used in punching fixtures for moulding of tubular parts with self-feeding and discharge of details. In the foundation of punch at the edges of working hole for discharge of moulded part there are located two mobile rods, installed in die bed through the basis of punch perpendicularly to gate axis, the first of which - before the working hole for discharge of moulded part in to collector, the second - after it. Top butt of the first rod is implemented inclined, its bottom edge is located at the level of top plane of punch basis, and top edge projecting over it, forming at the butt of the first rod inclined plane with rising in the direction of gate forward trace and projection in direction of gate return trace, herewith projection edge is located at the distance from the axis center of the punch, equal to dimension of inner radius of part blank. The second rod is implemented projecting over the top plane of punch basis for height not less the half of molded detail height. Additionally both rods are installed with the ability of its embedding into the punch basis. Gate end from the capture side of part blank is implemented in the form of through semi-open radial slot, located lengthwise gate axis, with dimension of slot radius by inner radius of gate feeder and with slot depth not less than one and half of blank part diametres.

EFFECT: operation life is increased.

3 cl, 2 dwg