Toolholder clamp for machine tools

Details Toolholder clamp for machine tools Toolholder clamp for machine tools

1977-05-23

1979-01-23

Hinson, Harrison L.

Cutting by use of rotating axially moving tool

Tool-support

With tool-retaining means

90 11D, B23B 3110, B23C 100

Patent

active

041358481

ABSTRACT:
A pair of gripper jaws are pivotally mounted on a machine tool spindle within a central bore that opens into the toolholder socket on the outer end of the spindle. The gripper jaws have serrated outer ends that extend into the toolholder socket in position to engage a threaded opening in the inner end of a toolholder which is to be clamped in the toolholder socket. Cam surfaces on a drawbar which extends between the gripper jaws interact with cam follower surfaces on the gripper jaws to cause the gripper jaws to move radially outwardly to clamp the toolholder within the toolholder socket when the drawbar is moved axially away from the toolholder socket. The gripper jaws have axial play therein. The drawbar is spring biased axially away from the toolholder socket to clamp the toolholder in the toolholder socket and press the toolholder against the margins of the toolholder socket. A hydraulic cylinder is provided to move the drawbar axially toward the toolholder socket against the force of the spring bias to allow the outer ends of the gripper jaws to move radially inwardly to release the toolholder for removal from the spindle.

REFERENCES:
patent: 3177775 (1965-04-01), Alisauskis
patent: 3323419 (1967-06-01), Riedel
patent: 3568566 (1971-03-01), Weidig
patent: 3791257 (1974-02-01), Frazier et al.
patent: 4011791 (1977-03-01), Lanzenberger

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