基于修正Archard磨损理论非标销轴温镦成形模具磨损研究

Study on wear of warm upsetting mold for non-standard pin shaft based on revised Archard wear theory

针对销轴温镦成形凹模磨损问题,采用有限元分析软件Deform-3D,基于修正Archard磨损理论对非标销轴成形过程进行模拟,从应力分布、成形载荷等多个方面对制件的成形效果和凹模磨损进行模拟分析。以延长模具使用寿命为目标,采用响应面法对成形过程中的关键工艺参数进行优化,得到各参数对凹模磨损的影响规律,确定最优工艺参数为:成形速度为5 mm·s^(-1),坯料加热温度为600℃,模具预热温度为280℃。采用优化后的工艺参数组合进行实际试模,制件成形效果良好,同时通过扫描电镜得出模具表面磨损形貌分布,凹模实际磨损与模拟结果基本一致,验证了模拟和优化结果的正确性。

For the mold wear problem of pin shaft during warm upsetting,the forming process of non-standard pin shaft was simulated by finite element software Deform-3 D based on revised Archard wear theory,and the forming effect and die wear were simulated and analyzed from multiple aspects such as stress distribution and forming load,etc.Then,aiming at extending the service life of mold,the key process parameters in the forming process were optimized by response surface method,and the influence rules of each parameter on the die wear were obtained,and the optimal process parameters were the stamping speed of 5 mm·s^(-1),the billet heating temperature of 600℃,the mold preheating temperature of 280℃.Furthermore,the actual mold trial was conducted by the optimized process parameters combination,and the part forming effect was good.At the same time,the wear morphology distribution on the mold surface was obtained by scanning electron microscope,and the actual wear of die was basically the same as the simulation result,which verified the correctness of the simulation and optimization results.