DIE SET FOR END FORMING OF PARTS FROM HOLLOW BLANKS Russian patent published in 1995 - IPC

FIELD: material forming. SUBSTANCE: die set includes a punch with a tip in the form of a collet chuck with slots and a die. The die set is provided by a guiding clamp in the form of a sleeve, having slots and arranged of the collet chuck with a shift relative to its slots, the sleeve, rigidly connected with the punch, has a lateral surface, extending outside of an end of the collet chuck and being equidistant relative to a cylindrical portion of the die surface. EFFECT: increased factor of material using due to reduced technological allowance values. 2 cl, 2 dwg, 1 tbl