Variable-channel extrusion die and forming method

Abstract

The invention relates to a variable-channel extrusion die and a forming method. The variable-channel extrusion die comprises a male die (1) and a female die (3), a die cavity of the female die sequentially comprises a feeding section (4), a front forming section (5), a middle forming section (6), a rear forming section (7) and a discharging section (8) from an inlet of a blank (2) to an outlet of the blank (2), wherein the feeding section (4) is a circular equant channel, the front forming section (5) is a circular-elliptical transition channel, the middle forming section (6) is a prismatic elliptical channel, the rear forming section (7) is an elliptical-circular transition channel, and the discharging section (8) is a prismatic circular channel; and the blank (2) enters from an inlet of the female die (3) and is limited by the die cavity of the female die (3) to change a circular cross-section into an elliptical cross-section and change the elliptical cross-section into the circular cross-section in order to form a performed workpiece. The variable-channel extrusion die has simple structure, low load, low cost and high efficiency and can be widely applied to producing rods and wires of steel and nonferrous metal and forging and blanking difficultly deformed materials of large-scale shaft parts, high-speed steel, powder metallurgy, and the like.

Description

1. Technical field [0001] The invention relates to the field of thermal processing of metal materials, in particular to a variable channel extrusion die and a forming method. 2. Background technology [0002] With the advancement of modern science and technology, major equipment is developing in the direction of large-scale, heavy-duty, high-power, and high-reliability. As the main load-bearing component for major equipment, forging technology plays an irreplaceable role in aviation, aerospace, atomic energy, automobile, machinery and other industrial sectors. The forging process can not only obtain the required shape and size, but also significantly improve the mechanical properties of the material such as strength, plasticity and toughness. [0003] In major mechanical equipment, such as train spindles, automobile crankshafts, aero-engine turbine disks, turbine blades and other parts, fracture accidents have a great relationship with the quality of forgings. Fracture of ...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems existing in the prior art or that cracks often appear in the material during the molding process, or the required equipment has a high tonnage, the mold load is complex, or in the equal channel angular extrusion, the stress state of the deformed blank is not ideal, and the strain of the section The distribution is also difficult to control the lack of uniformity, the present invention proposes a variable channel extrusion die and molding method

Images