FIELD: metallurgy.
SUBSTANCE: bending in the mould is performed by male die acting on the blank laid on ring female die with working surface shaped to parabola. Male die radius is selected with due allowance for blank material resilience. Extra support is arranged at female die centre, its height being controlled by a set of replaceable washers. Note here that extra support working surface curvature radius exceeds minimum radius of curvature of produced parts with due allowance for their thickness.
EFFECT: expanded performances.
2 cl, 1 dwg
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