Shock dampening system for presses

Details Shock dampening system for presses Shock dampening system for presses

1980-10-20

1982-07-20

Meister, James M.

Cutting

Means to drive or to guide tool

With simple rectilinear reciprocating motion only

83639, 267119, B26D 512

Patent

active

043399754

ABSTRACT:
An improved hydraulic fluid shock dampening system is disclosed for a shearing press to minimize shock loading vibration, and the level of noise emanating upon breakthrough of the material being sheared. 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 valve in communication with the chambers has a first fixed flow rate thereacross during the shearing operation, and prior to breakthrough, and is responsive to accelerated movement of the slide upon breakthrough to provide a second and substantially lower fixed flow rate thereacross during completion of the movement of the slide toward the press bed.

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: 3827328 (1974-08-01), LaFlamme et al.
patent: 4214496 (1980-07-01), Carrieri

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