基于计算机模拟的安全阀阀体多向模锻精密成形工艺  

Multi-directional die forging precision forming process of safety valve body based on computer simulation

作　　者：裴颖脱 Pei Yingtuo(Department of Industrial Technology,Tianjin Polytechnic College,Tianjin 300400,China)

机构地区：[1]天津工业职业学院工业技术系,天津300400

出　　处：《锻压技术》2022年第5期12-18,共7页Forging & Stamping Technology

基　　金：天津市“十三五”高等职业教育教学改革研究项目(2018-116);天津市高等职业技术教育研究会2019年度课题(2020-4040)。

摘　　要：以安全阀阀体为研究对象,根据其结构特征,提出了多向模锻精密成形工艺方案。通过数值模拟技术,分析了安全阀阀体的成形过程,研究了不同凸模结构对安全阀阀体成形的影响。结果发现,采用复合凸模结构时材料流动更合理,而采用单一凸模结构容易出现材料折叠缺陷。而后,基于复合凸模结构,研究了左右复合凸模的不同加载速度比对多向模锻精密成形过程的影响,并从安全阀阀体锻后的等效应变分布、温度分布、各凸模最大受力情况以及最小合模力等方面进行了对比分析。结果表明:当左右复合凸模的加载速度比为1.76∶1时,安全阀阀体锻后的等效应变及温度分布更为均匀,安全阀阀体成形效果更好,同时各凸模最大受力及最小合模力也更小,更益于延长模具的使用寿命。Taking the safety valve body as the research object,according to its structural characteristics,a multi-directional die forging precision forming process scheme was proposed.The forming process of the safety valve body was analyzed,and the influences of different punch structures on the forming of the safety valve body were studied by the numerical simulation technology.The results show that the compound punch structure makes the material flow more reasonable,while the single punch structure is prone to material folding defects.Then,based on the structure of compound punch,the influences of different loading speed ratios for left and right compound punches on the precision forming process of multi-directional die forging were studied,and the comparative analysis was carried out from the aspects of equivalent strain distribution,temperature distribution,maximum force condition of each punch and minimum clamping force for the safety valve body after forging.The results show that when the loading speed ratio of left and right compound punches is 1.76∶1,the equivalent strain and temperature distributions of the safety valve body after forging are more uniform,the forming effect of the safety valve body is better,and the maximum force and the minimum clamping force of each punch are also smaller,which is more beneficial to prolong the service life of die.

关 键 词：多向模锻精密成形 安全阀阀体 复合凸模 加载速度比 最小合模力 

分 类 号：TG315.2[金属学及工艺—金属压力加工]