Abstract A new approach is developed to predict the crater wear variation on straight grade tungsten carbide tools during titanium machining. The effect of crater wear geometry has been considered on the variation of local state variables such as normal stress ( σ n ) , chip sliding velocity ( v s ), and cutting temperature ( T ) over the contact length at varying cutting times. Experimentally determined crater profiles at progressive wear stages were geometrically replicated on the cutting tool models and used for FEM analysis. In order to account for the variation of the state variables and wear rates with respect to the tool-chip contact length, the dimensionless fractional contact length parameter is introduced in the Usui characteristic wear equation. The thermo-mechanical state variables evaluated at different fractional contact lengths and cutting time were used to obtain the wear coefficients. The crater wear profile and wear depth are predicted and the same is experimentally validated over the contact length.

中文翻译：

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WC/Co刀具在Ti6Al4V合金干车削过程中时空凹坑磨损预测

摘要 开发了一种新方法来预测钛加工过程中直级碳化钨刀具的月牙洼磨损变化。已经考虑了凹坑磨损几何对局部状态变量的变化的影响，例如法向应力 (σn)、切屑滑动速度 (vs) 和在不同切削时间下接触长度上的切削温度 (T)。在渐进磨损阶段通过实验确定的凹坑轮廓在切削刀具模型上几何复制并用于 FEM 分析。为了考虑状态变量和磨损率相对于刀具-切屑接触长度的变化，Usui 特征磨损方程中引入了无量纲分数接触长度参数。在不同接触长度和切割时间下评估的热机械状态变量用于获得磨损系数。陨石坑磨损轮廓和磨损深度是预测的，并且在接触长度上进行了实验验证。