FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and can be used in development of die for combined drawing and forming of complex-shape large-sized 3D part with stiffness ribs of various cross-sections. Male die has stiffness ribs of trapezoidal, triangular or circle fragment cross-section designed to form an appropriate stiffness rig of drawn part. Clearance between male and female die working surfaces is decreased owing to deposited ledges at said dies and equals the depth of blank sections abutting on male die rib with allowance for thinning of said blank sections in forming of said stiffness ribs.
EFFECT: higher precision of formed parts.
4 cl, 4 dwg
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