织构参数对刀具表面摩擦系数的影响研究
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摘要
研究了前刀面具有圆形凹坑阵列微织构的YT15硬质合金刀片对45钢工件进行切削试验时,其微织构参数与刀—屑界面平均摩擦系数的关系。通过单因素试验,获得各织构参数分别和刀—屑界面平均摩擦系数的关系:当凹坑直径小于200μm时,直径越大摩擦系数越小;接触区面积占有率在70%-75%时,摩擦系数较大,接触区面积占有率大于75%,时则可保证刀—屑界面摩擦系数较小;织构凹坑深度为4μm时,可以获得最小平均摩擦系数。验证了织构凹坑直径、接触区面积占有率以及凹坑深度等织构参数对刀—屑摩擦系数的关系,得出了在刀具前刀面加工出合适参数的微织构可有效降低刀—屑界面摩擦系数的结论。
In order to study the relationship between the micro-texture parameters and the average friction coefficient at the tool-chips interface,the YT15 carbide tool with a micro-texture on the rake face is used to perform cutting tests on 45 steel. Through the single-factor test,the relationship between the texture parameters and the average friction coefficient at the tool-chips interface is found as follows. First,when the diameter of the pit is less than 200 μm,the friction coefficient decreases as the diameter increases. Second,when area density of contact area is 70%-75%,the friction coefficient is relatively large,and when area density of contact area is greater than 75%,the friction coefficient is smaller. Finally,the minimum average coefficient of friction can be obtained when the depth of the texture pit is 4μm. The relationship between the texture parameters and the friction coefficient of the tool-chips interface is verified. It is concluded that the micro-texture with suitable parameters can effectively reduce the friction coefficient of the tool-chips interface.
In order to study the relationship between the micro-texture parameters and the average friction coefficient at the tool-chips interface,the YT15 carbide tool with a micro-texture on the rake face is used to perform cutting tests on 45 steel. Through the single-factor test,the relationship between the texture parameters and the average friction coefficient at the tool-chips interface is found as follows. First,when the diameter of the pit is less than 200 μm,the friction coefficient decreases as the diameter increases. Second,when area density of contact area is 70%-75%,the friction coefficient is relatively large,and when area density of contact area is greater than 75%,the friction coefficient is smaller. Finally,the minimum average coefficient of friction can be obtained when the depth of the texture pit is 4μm. The relationship between the texture parameters and the friction coefficient of the tool-chips interface is verified. It is concluded that the micro-texture with suitable parameters can effectively reduce the friction coefficient of the tool-chips interface.
引文
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[3]邓杰勇,郑清春,胡亚辉,等.基于ABAQUS的微织构刀具切削机理研究[J].工具技术,2016(11):23-27.
[4]Ranjan R,Lambeth D N,Tromel M,et al.Laser texturing for low-flying-height media[J].Journal of Applied Physics,1991,69(8):5745-5747.
[5]Jong D,Jason T,David F J,et al.Effect of surface texturing on CPT friction sleeve measurements[J].Journal of Geotechnical and Geoenvironmental Engineering,2001,127(2):158-168.
[6]陈平,李俊玲,邵天敏.考虑表面张力影响的表面织构最优参数分析[J].机械工程学报,2016,52(19):123-131.
[7]吴泽,邓建新.椭圆状微织构自润滑车刀切削性能试验[J].农业机械学报,2012,43(7):228-234.
[8]Kawasegi Noritaka,Sugimori Hiroshi,Morimoto Hideki,et al.A cutting tool with micro/nanometer-scale texture for improvement of friction behavior[J].Proceedings of the 10th Anniversary International Conference of the European Society for Precision Engineering and Nanotechnology,2008(2):116-120.
[9]Varun Sharma,Pulak M Pandey.Recent advances in turning with textured cutting tools[J].Journal of Cleaner Production,2016,137:701-715.
[10]谷万龙.钛合金的金刚石精密切削技术研究[D].哈尔滨:哈尔滨工业大学,2012.
[11]陈日曜.金属切削原理[M].北京:机械工业出版社,1985.
[12]马乐.油润滑条件下复合润滑结构的减摩性能研究[D].大连:大连海事大学,2017.