Manufacture of hollow workpieces

Details Manufacture of hollow workpieces Manufacture of hollow workpieces

1974-09-26

1976-03-09

Mehr, Milton S.

Metal deforming

By extruding through orifice

Pressure or velocity conditioning

72345, B21C 2314, B21C 3500

Patent

active

039423514

ABSTRACT:
While performing an ironing operation (a specific kind of drawing operation) on a hollow workpiece by means of a mandrel or punch and a die, the workpiece is caused to leave the die at a speed exceeding the speed of the mandrel, and the resulting forward slip with respect to the mandrel is controlled. The required mandrel stroke is reduced. Stripping of the workpiece from the mandrel may be started while the workpiece is still in motion relative to the mandrel.

REFERENCES:
patent: 3144132 (1964-08-01), Bridge
patent: 3343388 (1967-09-01), Zeitlin et al.
patent: 3402591 (1968-09-01), Maeder

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