扳手锻模疲劳裂纹分析与使用寿命计算  

Fatigue crack analysis and service life calculation of wrench forging die

作　　者：韩尚汝 程联军 王伟刚 李俊儒 HAN Shangru;CHENG Lianjun;WANG Weigang;LI Junru(College of Mechanical and Electronic Engineering,Qingdao University,Qingdao,266071,China;Wendeng Maxpower Tools Group Co.,Ltd.,Weihai 264400,China)

机构地区：[1]青岛大学机电工程学院,山东青岛266071 [2]文登威力工具集团有限公司,山东威海264400

出　　处：《模具工业》2025年第1期5-8,共4页Die & Mould Industry

基　　金：山东省自然科学基金资助项目(ZR2022ME193)。

摘　　要：针对某型号扳手锻模在生产过程中模具型腔板易产生疲劳裂纹的问题,使用Deform软件对锻造过程进行有限元仿真,运用内插法对锻模应力进行分析,获得锻模4个危险点的连续最大主应力变化曲线,锻造过程中锻模的最大主应力为461.5 MPa。使用抗拉强度拟合得到H13模具钢的S-N疲劳寿命曲线,结合锻模的应力变化曲线和Goodman平均应力修正计算得到锻模疲劳寿命为5012次,根据计算结果将修模安排在第4000次,可以减少模具零件裂纹的产生,提高生产效率。Aiming at the problem that the cavity plate of a type of wrench forging die is prone to fatigue cracks in the production process,the finite element simulation of the forging process was carried out by using Deform software,and the stress of the forging die was analyzed by using interpolation method,the continuous maximum principal stress change curve of the four dangerous points of the forging die was obtained,and the maximum principal stress of the forging die was 461.5 MPa in the forging process.The S-N fatigue life curve of the H13 die steel was obtained by using the tensile strength fitting,and the fatigue life of the die was correctional calculated to be 5012 times by combining the stress change curve of the forging die and the Goodman average stress.According to the calculation results,the die repair was arranged at the 4000 th,which could effectively reduce the generation of die cracks and improve production efficiency.

关 键 词：锻模裂纹 有限元分析 S-N曲线 Goodman应力修正 疲劳寿命 

分 类 号：TG315.2[金属学及工艺—金属压力加工] O242.2[理学—计算数学]