System for damping abrupt movement of a punch press ram

Details System for damping abrupt movement of a punch press ram System for damping abrupt movement of a punch press ram

1980-03-19

1982-01-19

Hershkovitz, Abraham

Expansible chamber devices

With means to control flow of non-working arresting fluid...

Work member position control

83617, 91 41, 92 85B, 92143, 92146, 267119, F15B 1522

Patent

active

043110860

ABSTRACT:
A system for damping abrupt movement of a punch press ram at the moment of cut-breakthrough with the use of at least two damping pistons disposed within cylinders and arranged to engage the press ram before and during cut-breakthrough. The cylinders within which the damping pistons are carried are connected to a hydraulic control system which permits the pistons to yield with the ram until the instant of cut-breakthrough, whereupon the damping pistons act as rigid bodies and prevent abrupt breakthrough movement of the ram.

REFERENCES:
patent: 2300162 (1942-10-01), Maude
patent: 3205749 (1965-09-01), Schenk
patent: 3744380 (1973-07-01), Steiger
patent: 4214496 (1980-07-01), Carrieri
patent: 4233872 (1980-11-01), Schulze

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