Shock dampening systems for presses

Cutting – Means to drive or to guide tool – With simple rectilinear reciprocating motion only

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Details

83639, 83 13, 83630, B26D 512

Patent

active

042144965

ABSTRACT:
A hydraulic fluid shock dampening system is disclosed for a shearing press to minimize shock and vibration imposed on the press following breakthrough of the material being sheared by cutting die components carried by the press bed and slide. The system includes cylinder and piston units interposed between the press bed and slide each providing a variable volume fluid receiving chamber from which fluid under pressure is expelled during movement of the slide toward the bed to achieve a shearing operation. A flow sensitive shutoff valve is responsive to accelerated movement of the slide upon breakthrough to block fluid flow from the chambers and thus restrain further slide movement toward the press bed. In preferred structural embodiments of the system, the cylinder and piston units, shutoff valve and fluid pressure accumulator components are structurally associated with a bolster plate mountable on a press, or with die components mountable on a bolster plate.

REFERENCES:
patent: 2278713 (1942-04-01), Riddle
patent: 2981136 (1961-04-01), Legge
patent: 3205749 (1965-09-01), Schenk
patent: 3487736 (1970-01-01), Kaiser et al.
patent: 3827323 (1974-08-01), LaFlamme et al.
patent: 3990351 (1976-11-01), Sundin
patent: 4026192 (1977-05-01), Noren et al.

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