Multiway shaping method of magnesium alloy wheel and mold

Abstract

The invention belongs to a magnesium alloy wheel multi-directional forming method and a die. The method is characterized by comprising the working procedures of blanking, upsetting, multi-directional extrusion, forward extrusion, flaring, heat treatment, machining and surface treatment, in the working procedures of the multi-directional extrusion, the forward extrusion and the flaring, axial pressure is applied to an axial male die so as to complete the forming of a magnesium alloy wheel, and lateral pressure drives a lateral male die to be connected with a split female die so as to complete the clamping and splitting of the split female die. The method solves the problems of forming and demoulding of a round wheel with small middle part and two large ends, has the advantages of simplifying the technical processes, improving the production efficiency, preventing the generation of burr flash, having high forming precision and the like.

Description

1. Technical field [0001] The invention belongs to the technical field of plastic forming of metal materials, and is mainly used for a multidirectional forming method and a mold of magnesium alloy automobile wheels. 2. Background technology [0002] Among non-ferrous metal materials, magnesium alloy has low density, high specific strength and good damping performance, and is known as "the green engineering material of the 21st century". With the increasing urgency of automobile lightweighting, magnesium alloys have shown great advantages in automobiles, and wheels are typical parts that use magnesium alloys as alternative new materials in the field of new-generation automobile products. At present, for magnesium alloy wheels, there are mainly two processing methods at home and abroad: casting and forging. [0003] Cast magnesium alloy wheels are mainly manufactured by low pressure casting, pressure casting, squeeze casting and other methods. For example, the article "Resea...

AI Technical Summary

Problems solved by technology

The magnesium alloy wheel made by this method has good mechanical properties, but its process is relatively complicated, and the required equipment types are many, and the production cost is high

Moreover, for magnesium alloys with low plasticity of close-packed hexagonal lattices, the difficulty of swaging and rolling processes is increased.

[0006] The Chinese patent number is: ZL03100893.3 discloses a casting-extrusion composite forming method for magnesium alloy automobile wheels. The casting process is used to make the required blanks, and the critical deformation is controlled to improve the mechanical properties of the magnesium alloy wheels; but the process is still relatively complicated and the forming force Big

Chinese patent number: 200610012829.9 discloses a labor-saving forming method and device for automobile wheel hubs. The hollow billet extrusion is used to reduce the forming force, but the billet making process is complicated, and the wheel flange is difficult to form, and the spokes need to be finely shaped to complete.

[0007] Chinese patent number: 200810054600.0 discloses a magnesium alloy automobile wheel extrusion forming method and mold, which proposes blanking-upsetting-reverse extrusion-machining-forward extrusion-flaring-heat treatment-final machining- The surface treatment process uses forward extrusion to directly form the front and rear rims of the wheel, but the middle of the forming (that is, after reverse extrusion) requires a machining process. Mold closing is done manually, and the production efficiency is low

Chinese Patent No.: 200510010214.8 discloses a "solid-state hot-extruded magnesium alloy hub forming device and its forming method", which proposes a device with a pin shaft on the ejector rod and relying on eccentric gravity or external force to split the mold, but the reliability is poor , easy to produce flash, difficult to achieve mass production

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