Clamping device for fastening a tool to a tool holder

Details Clamping device for fastening a tool to a tool holder Clamping device for fastening a tool to a tool holder

1980-07-29

1982-02-16

Crosby, Gene P.

Metal deforming

Tool and/or tool holder

Having unitary tool-face

72389, 72462, B21D 3704

Patent

active

043154255

ABSTRACT:
An easily releasable hydraulically pressurized clamping block assembly for attaching the bending tool to the ram of a folding press. A first clamping block having a recess to receive the tool abuts a bearing block at the rear thereof and is fitted with pins engaging in bores in the clamping block and in the bearing block while within the bearing block a longitudinal groove is provided which receives a hose which can be pressurized from a fluid pressure source through a control valve. Along the longitudinal groove between the above bores are holes which are fitted with springs which compress the hose when in a non-pressurized state. A modification provides pins with widened heads. Another modification uses straight pins and an intermediate block within the groove to press against the hose. Still another modification provides a groove in the ram itself rather than in a separate block.

REFERENCES:
patent: 476946 (1892-06-01), Leavitt
patent: 1386891 (1921-08-01), Mayer
patent: 3209576 (1965-10-01), Giordano

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