基于Archard模型的曲轴模具磨损分析

Wear analysis on crankshaft mold based on Archard model

为了探究某型曲轴模具在生产过程中的磨损情况,基于修正的Archard磨损模型,采用Deform-3D软件模拟研究了该曲轴模具在热锻过程中磨损深度的分布和变化规律。在模具型腔中取10个特征点,在模拟结束后得到每个点的磨损深度,与实际情况基本吻合,同时探究了不同预热温度、成形速度、润滑条件对制坯模具最大磨损深度的影响,并对各点结果进行拟合得到拟合曲线。由模拟结果可知,模具磨损深度最大处出现在P1~P6点附近,且制坯工序的模具磨损深度大于预锻和终锻工序;当模具预热温度为250~300℃、成形速度为300 mm·s^(-1)、摩擦因数为0.3时,模具的最大磨损深度最小。模拟结果可以为后续生产工艺优化以及预测和延长模具寿命提供参考。

In order to explore the wear condition of a certain type of crankshaft mold in the production process,based on the modified Archard wear model,the distribution and change laws for wear depth for the crankshaft mold during the hot forging process were simulated and studied by software Deform-3D.Then,ten characteristic points were taken in the mold cavity,and the wear depth of each point after simulation was obtained,which was basically consistent with the actual situation.At the same time,the influences of different preheating temperatures,extrusion speeds and lubrication conditions on the maximum wear depth of blank-making mold were explored,and the results of each point were fit to obtain the fiting curve.The simulation results show that the maximum wear depth of mold occurs near points Pl to P6,and the mold wear depth in the blank-making process is greater than that in the pre-forging and final forging processes.When the mold preheating temperature is 250-300℃,the forming speed is 300 mm·s^(-1)and the friction coeficient is 0.3,the maximum wear depth of mold is the smallest.Thus,the simulation results can provide a reference for subsequent production process optimization,as well as the prediction and improvement of mold life.