Workpiece holding device

Details Workpiece holding device Workpiece holding device

1980-08-25

1983-01-04

Vlachos, Leonidas

Turning

Severing or cut-off

Automatic and/or triggered control

228231, 279 2A, B23B 3140

Patent

active

043667350

ABSTRACT:
A workpiece holding device having an expandable mandrel for engaging a bore of the workpiece is disclosed. The holding device includes an expandable sleeve of generally cylindrical shape having a thin outer shell with a pair of opposed thick wall circular ends integral with the shell extending radially inward to form a bore. An elongated generally circular central body with a central bore for containing pressure and adapted to be mounted on a machine tool having an outside diameter engageable with the bore. A pair of opposed arcuate undercut grooves are formed at an intersection of the outer shell and the circular ends to prevent the formation of destructive stress concentration at the intersection. Chamfers are formed at the outer edges of the bore and copper rings are inserted therein and melted to form a seal between the bore and mount the expandable sleeve to the central body.

REFERENCES:
patent: 1346917 (1920-07-01), Sherman
patent: 1818042 (1931-08-01), Christman
patent: 3587371 (1971-06-01), Sherwood
patent: 3761008 (1973-09-01), Goulder

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