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三角凸缘法兰轴套工件是汽车传动系统重要零件。在热锻成形工艺中,由于非对称结构和复杂的金属流动产生的应力集中对成品率造成严重影响。文章设计了一种新型三角凸缘法兰轴套预锻凸模结构,对热锻成形过程进行耦合仿真分析,分析了凸模结构参数对工件金属最大流程K和内应力σ的影响。结果表明,采用预锻制坯、闭式模锻预锻、终锻成形的工艺方案,坯料利用率显著提高。预锻凸模坡面起始点的设计需考虑凸模与坯料接触条件,坡面角度θ与金属最大流程K呈正相关,坡面的起始点与工件中心轴的距离L与金属最大流程K负相关。预锻凸模模具可满足工件成形要求。
Triangular flange flange sleeve workpiece is an important part of the car drive system. In hot forging processes, stress concentration due to asymmetric structures and complex metal flow can have a serious impact on yield. In this paper, a new type flange flange bushing pre-punch is designed. Coupling simulation analysis of the hot forging process is carried out. The influence of the structural parameters of the punch on the maximum flow K and internal stress σ of the workpiece is analyzed. The results show that the use of pre-billet, closed forging forging, final forging forming process, the billet utilization increased significantly. The design of the starting point of the forging punch slope needs to consider the contact condition between the punch and the blank. The slope angle θ is positively correlated with the maximum flow K of the metal. The distance L between the starting point of the slope and the central axis of the workpiece is negatively related to the maximum flow K . Forging punch die to meet the requirements of the workpiece forming.