H形铝合金车轮辗锻工艺研究

Research on Production Process of H-type Aluminum Alloy Wheel

针对传统铝车轮锻造工艺中存在的压力机吨位大、能耗高等问题,制定了铝车轮辗锻新工艺,仅采用3 500 kN的旋转辗锻机即获得与传统50~60 MN压力机相同的锻件,而且缩短了工艺流程,降低了生产成本。以H形车轮为例,对辗锻过程进行有限元模拟,考察几个关键因素对辗锻成形力的影响,并进行了实际工艺试验。结果表明：成形力随着每转下压量P的减小而减小,随模具及棒料温度的降低而降低,终成形时模具下压速度推荐控制在15 mm/s以内,批量生产时需要考虑增设模具隔热及补温装置。试制得到的锻件质量良好,验证了工艺路线的正确性及可行性。

Due to ＇aluminum wheel traditional forging process exist large tonnage, high energy consumption, tile aluminum wheels rutary forging new technology, was established, using only 3 500 kN rotary forging machine to get same product with the traditional 50-60 MN press, then the process was shortened and the production cost was reduced. Taking H-type wheel as example, the rotary fi）rging process was simulated to study the influences of several key factors on the forming force. The process test results show： the forming force is decreased with the de- crease of each turn rolling reduction P, the forming force is decreased with the decrease of the mold and blank temperature; when the final forming, the recommended mold pressing speed should be controlled less than 15 mm/s; in mass production, thermal insulation device and temperature compensating device should be considered to add. Good quality forging is obtained, verifying the correctness and feasibility of/he process route.