FIELD: sheet forming, namely multiple-stage drawing of different configuration parts. SUBSTANCE: method comprises steps of stretching sheet blank around punch at several stages, between said stages tightly fitting sleeve onto changeable punch. Outer diameter of said sleeve is equal to diameter of punch of previous transition. Then said sleeve is shifted in direction of effort and blank is clamped in die of previous transition. EFFECT: increased drawing factor, enhanced quality of thin-wall parts. 2 dwg
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Authors
Dates
1997-09-27—Published
1993-11-12—Filed