FIELD: plastic metal working, in particular, cold stamping. SUBSTANCE: matrixes positioned on turret disk have through opening with shape conforming to maximum cross section of step of part to be manufactured, with step being formed at upsetting stage. Thickness of matrix is less or equal to thickness of step. Matrix opening is provided with conical belt disposed in its upper part and oriented to matrix upper end surface with its larger base. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 2 cl, 4 dwg
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