摘要
在机械加工中,车削温度对工件表面加工质量和刀具使用寿命有重要影响。设计了一种具有高效内冷却的刀具,在刀片内部设有储液凹槽,在凹槽内设有菱形肋柱,可以实现切削液对刀片的高效冷却,降低加工过程中刀具的切削温度。基于热-流-固耦合对刀片内冷却性能进行分析,在转速为600 r/min,切深为1.5 mm,工件直径为90 mm,进给率为0.3 mm/r的工艺参数下,计算前刀面的热流密度,并得到刀具的温度场。改变热载荷条件,在相同热源条件下,与其它刀具进行对比。结果表明,刀片材料采用YT5硬质合金,切削热载荷为107 W/m2,所设计的具有内冷却的刀具在切削过程中的最高切削温度为172.58℃,比其它刀具的切削温度低26.62 K。
In machining,turning temperature has an important impact on the surface machining quality of the workpiece and the service life of the tool.A tool with high efficiency internal cooling was designed.A liquid reservoir groove is arranged inside the blade,and a diamond shaped rib column is arranged in the groove,which can realize the efficient cooling of the cutting fluid to the blade,and reduce the cutting temperature of the tool in the machining process.Based on the thermal fluid solid coupling,the internal cooling performance of the blade was analyzed,and the heat flux of the rake face was calculated and the temperature field of the tool was obtained under the process parameters such as speed of 600 r/min,depth of cut of 1.5 mm,workpiece diameter of 90 mm,and feed rate of 0.3 mm/r.The thermal load condition was varied and it is to compare with other tools under the same heat source condition.The result shows that the blade material is made of YT5 cemented carbide,the cutting thermal load is 107 W/m2,and the maximum cutting temperature of the designed tool with internal cooling is 172.58℃in the cutting process,which is 26.62 K lower than that of other tools.
出处
《机械制造》
2024年第6期49-53,共5页
Machinery
基金
陕西省科技厅基金资助项目(编号:2023-JC-QN-0614)
陕西省教育厅专项科研计划项目(编号:21KJ0703)。
关键词
耦合
内冷却
刀片
性能
分析
Coupling
Internal Cooling
Blade
Performance
Analysis
