Adjustable stroke punch press

Details Adjustable stroke punch press Adjustable stroke punch press

1990-10-31

1992-05-05

Hornsby, Harvey C.

Presses

Reciprocating press construction

Range of movement adjustment

74571M, 83530, 83628, 100282, B30B 500, B30B 106

Patent

active

051097664

ABSTRACT:
The invention relates to an adjustable stroke punch press which has a crankshaft with an integral eccentric portion around which is disposed an eccentric sleeve, a connection arm, an L-shaped piston-like sleeve, a locking plate, and a clamping plate. During press operation, the eccentric sleeve is locked to the crankshaft through the locking plate and the clamping plate. Stroke length is adjusted by changing the eccentricity of the integral crankshaft eccentric portion relative to the eccentric sleeve. The eccentric sleeve is unlocked from the crankshaft and locked to the connection arm during stroke adjustment allowing the crankshaft to rotate relative thereto by utilizing the inching mode of the press.

REFERENCES:
patent: 1998242 (1935-04-01), Klocke
patent: 2454881 (1948-11-01), Michelman
patent: 3033055 (1962-05-01), Hahnel
patent: 3765266 (1973-10-01), Portmann
patent: 4156387 (1979-05-01), Portmann
patent: 4160409 (1979-07-01), Portmann
patent: 4216681 (1980-08-01), Morisawa
patent: 4354411 (1982-10-01), Griese et al.
patent: 4748883 (1988-06-01), Portmann
patent: 4785732 (1988-11-01), Czapka et al.
patent: 4846014 (1989-07-01), Shiga
patent: 4955254 (1990-09-01), Kato

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