中文摘要：

针对汽车发电机离合器使用的P6PL118型多楔带轮,提出了一种镦粗成形与旋压成形相结合的新工艺。基于Deform软件,研究了镦粗与旋压成形过程中摩擦因子、尾顶压下量与旋轮进给量对金属流动的影响,并研究了旋压成形中成形载荷及成形结束时的应变分布情况。在旋压机上进行试验,结果表明,得到的多楔带轮满足尺寸要求,晶粒更加细化。齿顶和齿底处加工流线清晰,沿齿形外廓线分布。旋压成形后工件顶部硬度提高最为明显,其次是工件中部,工件底部硬度提高最少。旋压件与毛坯态相比,维氏硬度平均提高25.9%,并具有更好的齿面硬度与耐磨性。

英文摘要：

For multiple V-groove pulley P6PL118 used in clutches of automobile alternator, a new process which combined the upsetting forming with the spinning forming was proposed. The influences of friction coefficient, billet reduction and feed amount of spinning roller on metal flow, load and strain distribution in the upsetting forming and spinning forming were studied based on software Deform. The mul- tiple V-groove pulley forming experiment was carried out on the spinning machine. The results show that the dimensional requirement of multiple V-groove pulley is fitted and its grains are smaller than before. Furthermore, the forming streamlines of tooth top and tooth root of workpiece are clear in the direction of tooth profile. Hardness of workpiecc top is improved significantly after spinning, and hardness of the middle part of workpiece is ranked secondly, while the hardness of workpiece root is improved just a little. Vickers-hardness of the average after spinning is increased by 25. 9% compared with that of the billet, which results in the good tooth surface hardness and wear resistance.