ALUMINUM ALLOY RECTANGULAR SHAPE PRESSING OUT METHOD AND DIE FOR PERFORMING THE SAME Russian patent published in 2005 - IPC

FIELD: plastic working of metals, namely processes for pressing out shapes of aluminum base alloys, constructions of pressing out tools.

SUBSTANCE: method comprises steps of making blank, heating, hot pressing out of blank through die, heat treatment of shape. At pressing out blank is subjected in upper p[art of die to additional shearing deformations due to twisting it by angle in range 40 - 50° relative to axis of die. Die includes deforming cone, working rectangular collar and outlet zone. Deforming cone has two helical protrusions in the form of trapezium. Upper base of said trapezium is equal to length of rectangle of working collar; its lower base consists 1.5 - 2 of parts of said length value. Rotation angle of upper cross section of protrusion relative to its lower cross section is in range 40 - 50° relative to axis of die. In longitudinal cross section said protrusions are in the form of parabola.

EFFECT: possibility for making rectangular aluminum alloy shapes with enhanced mechanical characteristics and low anisotropy of their properties, improved design of die.

2 cl, 4 dwg, 1 ex, 1 tbl