A Rotary Extrusion Die for Light Alloy Cup Parts

Abstract

The invention provides a rotating extrusion forming die for a light alloy cup-shaped piece. The rotating extrusion forming die comprises a plunger chip, a forming female die, a die pad, a lower die plate, a jacking block and a jacking rod. The plunger chip is designed through a symmetrical semicircle displacement fan-shaped structure boss die face, metal flowing during rotating extrusion is facilitated, and therefore a blank is subjected to relatively-large torque, in the pressure-torsion process, the blank is forced to form compression deformation in the height direction and shear deformation in the cross section, the deleterious effect of friction in the extrusion forming is eliminated, and the blank is forced to generate large plastic deformation. The forming female die is an annular revolution body, a plurality of curved grooves which are evenly distributed are formed in the side wall of an inner cavity of the female groove, the situation that different degrees of damage to the surface of the blank is caused when the blank revolves in the pressure-torsion process is prevented, and torsion transmission of the large-height-diameter ratio blank in rotating extrusion forming is facilitated. A certain draft angle is set for the side wall of the inner cavity of the female die, metal flowing in the blank anti-extrusion forming process and taking-out of the cup-shaped piece from the female die after extrusion is completed are facilitated.

Description

Technical field [0001] The invention relates to the technical field of metal plastic processing and forming, in particular to a rotary extrusion forming die for a light alloy cup-shaped piece with a fan-shaped structure boss die surface. Background technique [0002] The cup-shaped component is one of the most representative structural forms in the fields of aerospace, defense and military industry, transportation and other fields, and is a typical part of reverse extrusion technology. Inverse extrusion forgings have precise shape and dimensional accuracy, less cutting allowance, and good comprehensive mechanical properties. They have the characteristics of "high efficiency, high quality, and low energy consumption", and have high technical and economic use value. The cup-shaped component prepared by the traditional back-extrusion forming process requires multiple upsetting and long-drawing to achieve the desired grain refinement strengthening effect, and the production efficienc...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the defects and deficiencies of the prior art, and to provide a light alloy cup-shaped rotating extrusion forming die, the purpose of which is to improve the formability of magnesium alloys, obtain large plastic deformation, and improve the comprehensive mechanical properties of formed components. Overcoming the poor forming effect in the traditional rotary extrusion forming process, which is prone to defects such as folding or cracks

Images