新型点磨削砂轮磨削温度仿真实验
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摘要
点磨削倾斜角α和新型砂轮粗磨区倾角θ的存在使得砂轮与工件接触区域发生变化,由线接触变为理论上的点接触,磨削区温度也随之发生变化.本文采用有限元法仿真点磨削温度,采用热电偶法测量磨削区温度,设计了五因素四水平L16(45)正交试验;通过极差分析,得出影响点磨削温度的主次因素为:粗磨区倾角θ>磨削深度ap>倾斜角α>进给速度vf>砂轮速度vs,降低磨削区温度的最优参数组合为:θ(20°),ap(0. 01 mm),α(1°),vf(0. 6 mm/min),vs(35 m/s).最后采用单因素实验,验证仿真的正确性并且深入分析了各参数对点磨削温度的影响规律及原因.
The wheel-workpiece contact zone is changed due to point grinding inclining angle αand novel grinding wheel with coarse grinding area angle θ. It changes from line contact into point contact in theory and the grinding zone temperature is also changed. In this paper,the grinding zone temperature is simulated by the finite element method. The orthogonal experiments L16( 45)was designed and thermocouple measurement was used for grinding experiments. Through range analysis,primary and secondary factors affecting grinding temperature is that coarse grinding area angle θ > cutting depth ap> inclining angle α > axial feeding speed vf> grinding wheel speed vs.The optimum parameters combination of reducing the grinding zone temperature is that θ( 20°),ap( 0. 01 mm),α( 1°),vf( 0. 6 mm/min),vs( 35 m/s). Finally,by means of single factor experiments,the correctness of the simulation was verified and the influence of each parameter on grinding zone temperature was deeply analyzed.
The wheel-workpiece contact zone is changed due to point grinding inclining angle αand novel grinding wheel with coarse grinding area angle θ. It changes from line contact into point contact in theory and the grinding zone temperature is also changed. In this paper,the grinding zone temperature is simulated by the finite element method. The orthogonal experiments L16( 45)was designed and thermocouple measurement was used for grinding experiments. Through range analysis,primary and secondary factors affecting grinding temperature is that coarse grinding area angle θ > cutting depth ap> inclining angle α > axial feeding speed vf> grinding wheel speed vs.The optimum parameters combination of reducing the grinding zone temperature is that θ( 20°),ap( 0. 01 mm),α( 1°),vf( 0. 6 mm/min),vs( 35 m/s). Finally,by means of single factor experiments,the correctness of the simulation was verified and the influence of each parameter on grinding zone temperature was deeply analyzed.
引文
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[9]González-Santander J L,Martín G.A theorem for finding maximum temperature in wet grinding[J].Mathematical Problems in Engineering,2015,2015(10):1-13.
[10]Vinay P V,Rao C S.Temperature assessment in surface grinding of tool steels[J].Journal of Mechanical Science&Technology,2015,29(11):4923-4932.
[2]尹国强,巩亚东,温雪龙,等.新型点磨削砂轮磨削力模型及试验研究[J].机械工程学报,2016,52(9):193-200.(Yin Guo-qiang,Gong Ya-dong,Wen Xue-long,et al.Modeling and experimental investigations on point grinding force for novel point grinding wheel[J].Journal of Mechanical Engineering,2016,52(9):193-200.)
[3]Gong Y D,Yin G Q,Wen X L,et al.Research on simulation and experiment for surface topography machined by a novel point grinding wheel[J].Journal of Mechanical Science and Technology,2015,29(10):4367-4378.
[4]温雪龙,巩亚东,程军,等.铝合金Al6061微尺度磨削力热特性试验分析[J].机械工程学报,2014,50(23):165-174.(Wen Xue-long,Gong Ya-dong,Cheng Jun,et al.Experimental research on force and temperature characteristics in microgrinding Al6061[J].Journal of Mechanical Engineering,2014,50(23):165-174.)
[5]Malkin S,Guo C.Thermal analysis of grinding[J].CIRP Annals-Manufacturing Technology,2007,56(2):760-782.
[6]Hwang J,Kompella S,Chandrasekar S,et al.Measurement of temperature field in surface grinding using infra-red(IR)imaging system[J].Journal of Tribology,2003,125(2):377-383.
[7]Rowe W B.Thermal analysis of high efficiency deep grinding[J].International Journal of Machine Tools and Manufacture,2001,41(1):1-19.
[8]Rowe W B,Jin T.Temperatures in high efficiency deep grinding[J].CIRP Annals-Manufacturing Technology,2001,50(1):205-208.
[9]González-Santander J L,Martín G.A theorem for finding maximum temperature in wet grinding[J].Mathematical Problems in Engineering,2015,2015(10):1-13.
[10]Vinay P V,Rao C S.Temperature assessment in surface grinding of tool steels[J].Journal of Mechanical Science&Technology,2015,29(11):4923-4932.