FIELD: process engineering.
SUBSTANCE: invention relates to metal forming, particularly, to deep drawing. Proposed device comprise, at least, two ledges and, at least, two appropriate gaps between mould plates. Note here that position and width of gap between plates allow adjustment. Metal sheet is folded by closing said gap between mould plates. In subsequent deep-drawing, ledges go down into appropriate recesses. Proposed method is used to make moving stairway elements.
EFFECT: higher efficiency.
16 cl, 6 dwg
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