基于ANSYS环境切削刃温度的有限元建模与多步反向仿真

Finite Element Modeling and Multi-step Inverse Simulation of the Cutting Edge Temperature Based on the ANSYS

使用PCBN刀具对淬硬工具钢Cr12MoV(62±1 HRC)进行了精密干式硬态车削试验.依据精密干式硬态车削的特点,建立了小切深-大刀尖圆弧半径-斜角车削条件下的切削层几何模型,提出半月牙形区域为刀具的主要吸热区,并建立了PCBN刀片的有限元模型.在人工热电偶测得的刀具指定点温度的基础上,运用多步反向仿真法,利用ANSYS软件仿真了四种不同切削速度下的切削刃温度,结果表明,切削刃温度在725～1053℃之间变化,仿真值与试验值的绝对误差小于5%,满足目标要求.该方法在生产实践中具有实际的指导意义与参考价值.

An experiment investigation of finish dry hard turning various hardened tool steel Crl2MoV was con- ducted with the PCBN cutting tool. According to the manufacturing process in FDHT, the hardened steel, the geometrical model for the per-unit cutting lay was exploited under the condition of the smaller depth of cut-larger nose radius-oblique turning （SDOC-LNR-OT）. And the half-crescent shape zone is the main absorbing heat zone of the PCBN tool insert, which was presented in this paper. Then the finite element model of the PCBN tool in- sert was proposed. Based on the experiments and finite element modeling, the cutting edge temperatures in four cutting speed were simulated with the multi-step inverse simulation method utilizing the ANSYS software. The ex- perimental results show that the cutting edge temperatures are at 725 ~C - 1 053 ~C. And the absolute errors be- tween the experimental and simulated results are less than 5%, which meets requirements of the target. This method is of great directive significance and reference value in the production.