Conversion of mechanical punch presses to hydraulic punch presse

Details Conversion of mechanical punch presses to hydraulic punch presse Conversion of mechanical punch presses to hydraulic punch presse

1986-08-12

1988-05-03

Jones, David B.

Metal working

Method of mechanical manufacture

Converting

7245301, 100269R, B21K 2116, B23D 1704

Patent

active

047410841

ABSTRACT:
A method of converting a mechanically operated punch press to a hydraulically operated punch press, the mechanical punch press being of the type having a motor-driven flywheel coupled with a crank journaled between two bearing seats, the method comprising disconnecting the flywheel, replacing the crank with a hydraulic ram having trunnions projecting laterally therefrom and sized and positioned to be journaled in the same bearing seats in which the crank was journaled, and connecting the hydraulic ram to a source of hydraulic fluid. A controller can be interposed between the source of hydraulic fluid and the ram to control the operation of the punch press.

REFERENCES:
patent: 2848034 (1958-08-01), Ernst
patent: 3143007 (1964-08-01), Thompson
patent: 3552182 (1971-01-01), Handler
patent: 3941046 (1976-03-01), Smith
patent: 4148209 (1979-04-01), Bessho

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