FIELD: metallurgy.
SUBSTANCE: lower collet in the middle part has a cylindrical cavity where the elastic element in the form of ring is located the external surface of which is made cylindrical, and the internal conic - conic. The bigger radius is equal to the radius of the small end face of the punch, and the smaller radius is determined by a formula.
EFFECT: accuracy of geometrical sizes of details is improved.
1 dwg
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