Method and apparatus for the shock pressure shaping

Details Method and apparatus for the shock pressure shaping Method and apparatus for the shock pressure shaping

1977-05-24

1979-05-08

Lanham, C. W.

Metal deforming

With means to drive tool

With means to selectably control movement of tool

7245302, B21J 912

Patent

active

041529219

ABSTRACT:
An impact shaping apparatus is provided having a hydraulic actuator associated to the shaping tool. A gas spring of adjustable spring constant is in permanent fluid connection with the hydraulic actuator so as to allow for adjustment of the impact characteristics in accordance with the cold-working characteristics of the material to be shaped. The gas spring is formed by a cylinder and a floating piston arranged therein and defining a first working space communicating with the hydraulic actuator and a second working space containing a mass of gas.

REFERENCES:
patent: 1068243 (1913-07-01), Iversen
patent: 1230486 (1917-06-01), Jacomini
patent: 1230492 (1917-06-01), Kristufek
patent: 2403912 (1946-07-01), Doll
patent: 3863488 (1975-02-01), Deordiev

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