FIELD: cold sheet forming.
SUBSTANCE: method for braking flange of sheet blank at drawing process comprises steps of folding flange at moving it through tightening ribs and lips; braking flange of blank due to its alternating sign-variable bending at moving through tightening lip and at least through one next row of tightening ribs; after bending each member of flange in the same direction, straightening and bending said members in opposite direction.
EFFECT: enhanced quality and accuracy of drawn parts, reduced consumption of rolled sheet.
2 cl, 3 dwg
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