单颗刚玉磨粒切削齿轮钢温度场仿真研究

Simulation Researh of Cutting Temperature in Cuting Gear Steel by Single Alumina Grit

针对单颗磨粒试验法对于磨削温度的研究存在局限性,建立了单颗刚玉磨粒切削齿轮钢的ABAQUS仿真模型和磨粒-工件的热传导模型,利用数值模拟技术研究了单颗磨粒切削过程的温度场,分析了不同的磨粒特性和工艺参数下工件的最高温度的变化;仿真结果可知,切削过程工件的最高温度出现在第二温度区磨粒前刃与工件接触处,切削温度场最高温度随时间趋势呈现先增大后降低至稳定值的特点,切削深度与磨粒锥角对于切削最高温度均有正作用;而当切削速度小于50m/s时,最高温度随速度递增,切削温度对切削最高温度的作用以50m/s为临界,在切削大于50m/s时,切削最高温度出现下降的趋势。

Specific to the limitation in explanation of the grinding temperature through single grit cutting experiment,the finite element and heat transfer model of single grit cutting was built.The temperature field during single grit cutting was modeled by finite element method（FEM）.The trends of highest cutting temperature with different grit characteristic and process parameters were analyzed.The simulation results showed that the highest temperature during process was located at the secondary zone and the zone adjacent to the cutting edge.The highest cutting temperature increased first,and then decreased to a stable value.Followthe increase of depth of cut and angle of cone,this trend of highest cutting temperature fell down.When the cutting speed was lower than 50m/s,the highest temperature increased with the velocity increasing.When the velocity was higher than 50m/s,the highest temperature fell down.