FIELD: plastic metal working, namely production of parts from sheet materials. SUBSTANCE: sheet blank is placed on rigid die. Two flat plates are preliminarily arranged between die and blank in bending zone at both sides of die. Gasket bent according to punch shape is arranged between punch and blank. High-strength material is used for making plates and gasket. Then blank is bent in die by means of rigid punch. EFFECT: enhanced quality of part surface, increased useful life of punch. 2 dwg, 1 ex
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