FIELD: process engineering.
SUBSTANCE: invention relates to metal forming, in particular to deep drawing from thin-skeet blanks. Thin-sheet blank is arranged in clamping cavity. Blank flange is held down. Tractive force is applied to central part of the blank on the side of fixed punch. Blank is fitted to punch. Said tractive force can be generated by either magnetic field or vacuum. Press tool comprises fixed punch, collet, female die and blank cavity. Blank is locked at the center. In one case, punch is mounted on electromagnet of permanent magnet, in the other case, punch center has a bore communicated with vacuum system. Punch working face has annular groove accommodating elastic sleeve.
EFFECT: no corrugations, higher quality.
5 cl, 2 dwg
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