Two-step plasticity forming method of vehicle wheel hub and mated forming die

Abstract

The invention discloses a two-step plastic forming method for a wheel hub of an automobile. The method adopts two sets of molds to perform extrusion forming on a blank in two steps under isothermal conditions, and comprises the following steps: 1, placing the blank into a extrusion forming mold, and forming a wheel spoke part firstly and pre-forming front and rear wheel rim parts of a wheel felloe at the same time by adopting an extrusion mode; and 2, placing a preformed part into a flaring mold to perform one-time flaring forming on the front and rear wheel rim parts of the wheel felloe. Compared with the prior art, the method has the characteristics of low forming force, less equipment investment, low production cost, high forming quality, and the like. At the same time, the invention also discloses the extrusion forming mold and the flaring mold which are matched with the method.

Description

technical field [0001] The invention belongs to the plastic forming technology of aluminum and magnesium alloys, in particular to an extrusion forming method of a magnesium alloy automobile wheel hub or similar disc-shaped parts and a matching forming die. Background technique [0002] As a pillar industry of the national economy, the automobile industry develops extremely rapidly. How to limit energy consumption, improve energy utilization, and reduce waste gas emissions is particularly important for protecting the ecological environment and people's living environment. One of the most effective ways to save fuel consumption is to reduce the weight of the car. As the basic bearing part of the vehicle, the performance of the wheel hub will directly affect the driving safety, energy consumption and appearance quality of the vehicle. [0003] The aluminum alloy wheel hub has the advantages of light weight, anti-corrosion, good thermal conductivity, can reduce the temperature ...

AI Technical Summary

Problems solved by technology

The grain of the product is refined, the structure is dense, the mechanical properties and surface quality are high, but the process is still relatively complicated, the forming force is large, the rim is difficult to form, it is difficult to demould, and the required equipment pressure is relatively high

[0008] Patent No. ZL200510010214.8 published on January 11, 2006 discloses a solid-state hot-extruded magnesium alloy wheel forming device and its forming method, which adopts a solid-state hot-extrusion method to form a magnesium alloy wheel at one time , the process is the least, but the degree of deformation and friction are large, resulting in a large unit extrusion force. When the size of the hub is large, the size of the mold is very large, and the tonnage of equipment is also large, resulting in an increase in cost.

[0009] The Chinese invention patent specification published on November 22, 2006 with the patent number 200610012829.9 discloses a labor-saving forming method and device for an automobile wheel hub. Extruded front rim-flared rear rim-finishing process, the purpose of adopting multiple processes is to reduce the forming force, but the process is too complicated, which increases the production cost and is not conducive to popularization and development

Images