PUNCH FOR EXPANDING TUBE ENDS Russian patent published in 1999 - IPC

Abstract RU 2127165 C1

FIELD: plastic metal working, namely forming parts of tubular blanks. SUBSTANCE: builtup detachable punch for expanding tube end portions includes arranged successively in common axle: guiding portion having cylindrical and cone parts; shaping portion having concave and convex parts; sizing portion having cone and cylinder parts. Guiding and sizing portions are made of material with low permeability; shaping portion is made of material with high permeability. EFFECT: expansion of ends of tubes of different shape and dimensions, enhanced quality of expanded tubes. 2 cl, 1 dwg

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RU 2 127 165 C1

Authors

Mar'In B.N.

Ivanov Ju.L.

Odinokov V.I.

Murav'Ev V.I.

Ivanov V.Ju.

Dates

1999-03-10—Published

1997-11-27—Filed