台阶轴胎模锻填充不满机理分析与对策研究  

Mechanism Analysis and Countermeasures for Filling Defects of Stepped Shaft Forging

作　　者：郝用兴[1] 杨松伟[1] 郭华毅[1] 张勇[1] 

机构地区：[1]华北水利水电学院,河南郑州450011

出　　处：《华北水利水电学院学报》2012年第5期72-75,共4页North China Institute of Water Conservancy and Hydroelectric Power

基　　金：华北水利水电学院青年科研基金(HSQJ2005009)

摘　　要：台阶轴胎模锻过程中,易出现坯料填充不满缺陷.为解决此问题,应用DEFORM-3D建立有限元模型,通过对内部材料速度流动图、变形流线图进行分析.结果表明:坯料的不均匀变形流动导致坯料填充不满,模具与坯料接触摩擦因数越大,填充不满现象越严重;减小摩擦因数对不均匀变形流动状况改善有限;上模增加锥度,能有效改善坯料变形流动均匀性;增加锥度与改善摩擦条件两种措施结合能够更加有效地改善填充效果;在摩擦因数为0.3、锥度为3°的工艺条件下,填充程度能够达到92%.At the contact boundary of the die, the billet is not easy to be filled into the die fully in stepped shaft forging process. The simulation software DEFORM-3D is used to simulate the forming process of stepped shaft forging. By analyzing the speed flow chart and flow net chart, it is indicated that the non-uniform deformation will lead to the unsuccessful comer filling defects： the bigger the friction coefficientis, the worse the forming defects. However, reducing friction coefficient can obtain a limited improvement of the non-uniform deformation flow condition. And an outer cone punch can effectively improve the billet deformation flow uniformity. Therefore, an outer cone punch combined with appropriate friction condition can effectively improve filling effect, and with the friction coefficient 0.3, ta- per 3° in forging process, the filling degree can reach 92%.

关 键 词：台阶轴 胎模锻 成形缺陷 有限元 

分 类 号：TG316.3[金属学及工艺—金属压力加工]