氧化锆陶瓷车削刀具磨损机理及理论模型

通过不同刀具几何参数的YG6刀具车削氧化锆实验，研究了工程陶瓷切削刀具体积磨损理论模型.从强度理论和刀具磨损材料迁移的本质出发，将刀具的二维磨损推广至三维磨损.基于黏着效应机制，研究了氧化锆陶瓷车削的刀具磨损机理.通过力学分析，采用逐层积分法，综合了刀具几何参数与后刀面磨损面积之间关系，建立了刀具体积磨损理论模型.验证实验结果表明，刀具体积磨损量随前角或后角的变大先减小后增大，随刀尖圆弧半径的变大而减小，刀具体积磨损的模型理论值与实验值趋势一致，平均相对误差为4%~15%，说明模型具有较高的可靠性.

Tool Wear Mechanism and Theoretical Model of Zirconia Ceramic Turning

Through the experiment of YG6 tool turning zirconia with different tool geometric parameters， the theoretical model of tool volume wear was studied in engineering ceramic turning. Starting from strength theory and the essence of tool wear material migration， tool wear scale was extended from two-dimensional wear to three-dimensional wear. Based on the adhesion effect mechanism， the tool wear mechanism of zirconia ceramic turning was studied. Based on mechanical analysis， and adopting the method of layer by layer integration， the relationship between the tool geometric parameters and the flank wear area was synthesized， and the theoretical model of tool volume wear was established. Verification experiment results showed that tool volume wear decreases firstly and increases afterward with the increase of the rake angle and back angle， and decreases with the increase of the corner radius. The theoretical value of tool volume wear is consistent with the experimental results， and the average relative error is 4%~15%， which indicates that the model has high reliability.