基于单刃单磨粒正交切削的微铣磨温度仿真

建立单刃单磨粒正交切削模型,采用任意拉格朗日-欧拉(ALE)法,对微尺度铣磨复合加工进行有限元仿真,分析切削过程中的温度场分布与变化情况,以及后刀面磨粒磨削对加工温度的影响.按照热源分布位置划分温度区,分析加工过程中各温度区温度变化规律.通过仿真结果发现,工件加工时温度场中的最高温度出现在磨粒磨削区和毗邻刃口处两个位置;除磨粒磨削区外,微铣磨复合加工工件各温度区温度变化规律与微铣削相同;后刀面磨粒磨削作用使切削过程中工件各温度区温度升高,离磨削区越近,温升越大.

Simulation of Temperature in Micro Mill-Grinding Based on Single-Edge Single-Grit Orthogonal Cutting

The single-edge single-grit orthogonal cutting model was developed， and the finite element simulation of micro mill-grinding was accomplished using the arbitrary Lagarangian Eulerian (ALE) method. The distribution and variation of temperature fields in the cutting process were analyzed. For the grinding of abrasive grains on the rear face， its effect on processing temperature was investigated. Temperature zones were defined according to the heat sources distribution， and the temperature change law of each temperature zone was analyzed. The simulation results show that the maximum temperature during processing is located at the abrasive grinding zone and the zone adjacent to the cutting edge. The temperature change law of each temperature zone in micro mill-grinding is the same as that in micro milling except for abrasive grinding zone. Grinding of the grit on rear face leads to temperature rise of all zones during processing. And the closer from the grinding zone， the larger the temperature rise is.