Spindle unit and tool clamping device therein for machine tools

Details Spindle unit and tool clamping device therein for machine tools Spindle unit and tool clamping device therein for machine tools

1991-01-08

1992-08-25

Bilinsky, Z. R.

Tool changing

Including machine tool or component

Rotating work machine tool

409233, 483 21, B23C 526, B23Q 3157

Patent

active

051407396

ABSTRACT:
A spindle unit comprising a solid shaft main spindle of a highly rigid material such as cemented carbide, with the main spindle being rotatably supported in a spindle head by bearings less apt to generate heat. A tool-clamping device including an adapter attached to a front end of the main spindle, and a tool holder carries a rotary tool. On of the adapter and the holder comprises a short columnar lug, with the other of the adapter and holder comprising a cylindrical hole shrinkage-fitted on the lug. The member having the hole is made of a material having a coefficient of thermal expansion lower than a coefficient of thermal expansion of the other member. The tool-clamping device further comprises heating and cooling devices for heating and cooling the member having the hole.

REFERENCES:
patent: 2942891 (1960-06-01), Zale
patent: 3240503 (1966-03-01), Watson et al.
patent: 4818161 (1989-04-01), Cook

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