铲钻倒棱刃口几何参数对钻削温度的影响  

Influence of Geometric Parameters of Chamfered Edge of Spade Drill on Drilling Temperature

作　　者：王贵林 于爱兵[1] 王家炜 李克凡 邹翩 吴森凯 Wang Guilin;Yu Aibing;Wang Jiawei;Li Kefan;Zou Pian;Wu Senkai(Faculty of Mechanical Engineering and Mechanics,Ningbo University,Ningbo,Zhejiang 315201,China;不详)

机构地区：[1]宁波大学机械工程与力学学院

出　　处：《工具技术》2024年第7期41-46,共6页Tool Engineering

基　　金：国家自然科学基金(51875294);浙江省教育厅科研项目(Y202250061)。

摘　　要：探究铲钻倒棱几何参数对钻削温度的影响,为铲钻倒棱刃口的参数选择提供参考。通过有限元仿真模拟铲钻钻削过程的温度场得到倒棱角度和倒棱宽度对钻削温度的影响规律。为了验证仿真模拟结果,使用红外热像仪测量钻削过程中切屑温度,并通过光学显微镜观察切屑表面形貌,分析钻削温度随着倒棱刃口几何参数变化的原因。研究结果表明,最高钻削温度区域出现在倒棱面及其附近的前刀面,钻削温度随着倒棱宽度的增大呈现先增大再减小的趋势。随着倒棱角度的增大,钻削温度呈先增大后减小最后再增大的趋势。在设计倒棱刃口时,倒棱宽度应该选择0.1mm<b≤0.3mm,倒棱角度选择10°<γ≤20°,这样可使铲钻刀片具有良好的散热性能。倒棱宽度和倒棱角度的增大加剧了刀—屑的摩擦,导致钻削温度升高,同时也提高了铲钻刀片的散热能力。To explore the influence of chamfer geometry parameters on drilling temperature,and to provide reference for parameter selection of chamfer edge of spade drill,the influence of chamfered angles and widths on drilling temperature is obtained by finite element simulation of temperature field during drilling process of spade drill.To verify the simulation results,the chip temperature during the drilling process is measured by an infrared thermal imager.The surface morphology of the chips is also observed by optical microscope,and the reasons for the variation of drilling temperature with the geometric parameters of the chamfered edge are analyzed.The results show that the drilling temperature first increases and then decreases from the increase in chamfer width.With the increase in chamfer angle,the drilling temperature of the spade drill first increases,then decreases and finally increases.When designing the chamfer edge,the chamfer width should be selected as 0.1 mm<b≤0.3 mm,and the chamfer angle should be selected as 10°<γ≤20°to make the spade drill insert have good heat dissipation capability.When chamfer width and chamfer angle increase,the friction of the chips intensifies and the drilling temperature increases.At the same time,the increase in chamfer width and chamfer angle also improves the heat dissipation capacity of the spade drill insert.

关 键 词：铲钻 倒棱 几何参数 温度 

分 类 号：TG52[金属学及工艺—金属切削加工及机床] TH162.2[机械工程—机械制造及自动化]