Radial extrusion process combined with inside tune ironing

Details Radial extrusion process combined with inside tune ironing Radial extrusion process combined with inside tune ironing

1997-09-15

1998-06-16

Larson, Lowell A.

Metal deforming

By extruding through orifice

Utilizing internal forming means

723532, 723554, B22B 2100, B21C 2304

Patent

active

057654255

ABSTRACT:
A subject of the invention is the radial extrusion process combined with inside tube ironing, which is in essence a cold extrusion process and can be reckoned among bulk metal forming processes. It enables tube shaped metal semiproducts to be formed into different final shaped parts or parts that are intended for additional working, for example by machining. The process is grounded on insertion of a tube, which may be on one end previously expanded, into a proper shaped die, where on one side there is a punch which is retained with a determined force and inside which lies a free movable mandrel, while from the other side in working stroke the counter-punch extrude the difference of tube volume which results from ironing of the tube, in the direction of counter-punch travel so, that the material fills up the starting clearance between the mandrel and the tube, the space between the tube and the punch and arbitrary shaped space in the punch or in the die.

REFERENCES:
patent: 3899912 (1975-08-01), Orain
patent: 4611391 (1986-09-01), Franz et al.

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