某结合齿热锻模具开裂数值模拟分析及改进  

Numerical simulation analysis and improvement of hot forging die cracking for combined gear

作　　者：徐伟[1] 肖铁忠[1] 

机构地区：[1]四川工程职业技术学院,四川德阳618000

出　　处：《制造技术与机床》2016年第11期141-143,148,共4页Manufacturing Technology & Machine Tool

基　　金：四川省教育厅科研项目(16ZB0495)

摘　　要：针对某结合齿热锻过程中模具发生开裂失效的问题,通过有限元模拟软件对锻造过程进行了模拟分析,得出模具发生开裂的主要原因为危险处拉应力超过模具材料的抗拉强度。针对模具开裂失效原因,提出两种解决模具开裂失效的方法,一是优化预锻坯形状,二是优化模具结构,即采用分体式模具结构代替整体式模具结构。优化后的模拟结果表明,采用分体式模具结构大大减小了危险处拉应力值,从而避免了模具的早期失效。实际生产结果也表明,采用分体式模具结构大大提高了模具寿命。To solve the problem of die cracking on a combined gear, the forging process is simulated with FE simu- lation software, the result shows the reasons of die cracking are that die stress concentration. Two solu- tions are put forward to solve the problem, one is optimizing the shape of billet, the other is optimizing the structure of die, which is replacing integral die with splitting die. Results of simulation shows die stress is greatly decreased, avoiding stress concentration. Practical production results show the die life is greatly increased with splitting die structure.

关 键 词：结合齿 模具开裂 有限元模拟 模具结构 

分 类 号：TG316[金属学及工艺—金属压力加工]