基于离散元法对冷硬铸铁切削过程的模拟与工艺优化

Simulation and Optimization of the Cutting Processes of Chilled Cast Iron Based on PFC2D

运用离散元方法对冷硬铸铁正交切削过程进行了模拟.利用PFC2D商业离散元软件建立了二维平面模型,分析了低速切削时不同的切削速度、不同的切削深度对切削力的影响.模拟结果表明,在低速切削时,切削力随切削速度的提高而增大,随切削深度的增大而增大.将计算结果与其他结果进行了比较,发现二者比较接近.进而说明离散元方法模拟脆性金属低速切削过程是可行的.利用模拟的结果对切削工艺进行了优化.

The chilled cast iron cutting processes were simulated by using discrete element method（DEM）.It was established the two-dimensional model by using commercial software PFC2D.Under the low speed cutting,the cutting forces for different velocity and different cutting depth were analyzed.The results indicated that the cutting force increases with the increasing of cutting speed,it also increases with the increasing of cutting depth.The simulated results compared with other results,and the simulation results are close to the actual data.This study explains that using DEM to simulate the low speed cutting process of the brittle metal is valid.And the cutting processes parameters were optimized.