FIELD: metallurgy.
SUBSTANCE: preliminarily swaged blank is pressed out into tapered part of matrix and it is received preliminary forging with flange of required dimensions, conical flange part and preliminary outline for reach-through hole. Preliminary outline allows forming angle at the side surface. Tapering of flange part of preliminary forging exceeds tapering of flange part of final forging. Then it is implemented punching of final forging with shaping of conical flange part, allowing undeviating reach-through hole. Mentioned shaping is implemented by means of cut off of forming slope and crosspiece broaching. These operations are implemented simultaneously with distribution and elongation of flange part and calibration of reach-through hole.
EFFECT: reduction of metal consumption and reduction of straining effort while punching.
4 dwg
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