APPARATUS FOR HOT EXTRUSION OF TUBES AND FRONT SLEEVE FOR SUCH APPARATUS Russian patent published in 2000 - IPC

Abstract RU 2146977 C1

FIELD: plastic metal working, namely extrusion of tubes of hard-to-form metals in presses without piercing system. SUBSTANCE: apparatus for hot extrusion of tubes includes body of blank with inner duct, mandrel with stem, pressure pad with cavity for locking its joint with extrusion ram, sleeves mounted between mandrel and blank body. Joined surfaces of end of mandrel stem and cavity of pressure pad are spherical. Slit-type front sleeve of blank has cylindrical central portion and terminal portions with sloped surface. Sloped surface turned to body of blank is made according to diameter of blank body duct. Surface turned to direction of extrusion is made according to diameter of extruded tube. EFFECT: enhanced accuracy of extruded tube. 3 cl, 2 dwg

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RU 2 146 977 C1

Authors

Smirnov V.G.

Smirnov G.V.

Dates

2000-03-27—Published

1998-09-08—Filed