相变材料对磨具磨削层热性能影响的理论与数值分析
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摘要
磨具的磨削层结合剂中的相变材料可以改变磨削层的热性能,进而影响磨削层与工件间的热量分配。通过建立相变材料相变过程的两相复合材料等效比热容理论模型,以及石蜡/环氧树脂复合材料与蓝宝石工件的传热数值模型,分析相变材料体积分数对磨削层热性能以及磨削层与工件热量分配的影响。结果显示:复合材料等效比热容理论值与仿真值误差小于2%,验证了该理论模型的有效性。随着相变材料体积分数的增加,磨削层的等效比热容逐渐增大,工件分配的热量逐渐减少。与磨削层强度分析结合,确定相变材料体积分数的最优值为26%。
The phase change material(PCM) in the grinding layer binder of the grinding tool can change the thermal properties of the grinding layer, and then affect the heat distribution between the grinding layer and the workpiece. In this paper, we establish a theoretical model of equivalent specific heat capacity of two-phase composite material considering the phase change process of PCM, and a numerical model of heat transfer between paraffin/epoxy resin composite material and sapphire workpiece. Then we analyze the influence of the volume fraction of the PCM on the thermal characteristics of grinding layer and heat partition of grinding layer and workpiece. The results show that the error between theoretical value and simulation value of composite equivalent specific heat capacity is less than 2%, which verifies the validity of the theoretical model. As the volume fraction of the PCM increases, the equivalent specific heat capacity of the grinding layer increases and the heat transferred to workpiece decreases. Combining with the strength analysis of grinding layer, the optimum volume fraction of PCM is 26%.
The phase change material(PCM) in the grinding layer binder of the grinding tool can change the thermal properties of the grinding layer, and then affect the heat distribution between the grinding layer and the workpiece. In this paper, we establish a theoretical model of equivalent specific heat capacity of two-phase composite material considering the phase change process of PCM, and a numerical model of heat transfer between paraffin/epoxy resin composite material and sapphire workpiece. Then we analyze the influence of the volume fraction of the PCM on the thermal characteristics of grinding layer and heat partition of grinding layer and workpiece. The results show that the error between theoretical value and simulation value of composite equivalent specific heat capacity is less than 2%, which verifies the validity of the theoretical model. As the volume fraction of the PCM increases, the equivalent specific heat capacity of the grinding layer increases and the heat transferred to workpiece decreases. Combining with the strength analysis of grinding layer, the optimum volume fraction of PCM is 26%.
引文
[1]王龙兴.2018年全球半导体市场的展望[J].集成电路应用,2018(1):9-12.
[2]Zhou Y,Pan G S,Shi X L,et al.Atomic step morphology research of LED sapphire substrate polishing surface and its periodicity[J].Optics&Precision Engineering,2017,25(1):100-106.
[3]我国成功研制重要战略半导体材料[J].机械,2015(8):12.
[4]王紫光,高尚,朱祥龙,等.硅片低损伤磨削砂轮及其磨削性能[J].光学精密工程,2017,25(10):2689-2696.
[5]高尚.超精密磨削硅片的软磨料砂轮的研制[D].大连:大连理工大学,2009.
[6]仇中军,周立波,房丰洲,等.石英玻璃的化学机械磨削加工[J].光学精密工程,2010,18(7):1554-1561.
[7]华勇.磨料磨具导论[M].北京:中国标准出版社,2004.
[8]VECCHIARELLI J A,KINISKY T G,SHELDON D A.Impregnation of grinding wheels using supercritical fluids:US,US7344573[P].2008.
[9]史兴宽,康仁科,任敬心.浸渗砂轮在刀具行业中的用研究[J].工具技术,1994(3):38-40.
[10]HICKORY G E,WHITE M J.Grinding wheel abrasive composition:US,US 5061295 A[P].1991.
[11]MA B,ZHOU X Y,LIU J,et al.Modeling and impacts of the latent heat of phase change and specific heat for phase change materials[J].Materials,2016,9(5):389-395.
[12]陈德鹏,钱春香,王辉,等.水泥基材料比热容测定及计算方法的研究[J].建筑材料学报,2007,10(2):127-131.
[13]熊梦雅,冯妍卉,冯黛丽,等.金属有机骨架复合体的相变热特性测试[J].工程热物理学报,2018(1):165-171.
[14]张涛,余建祖,高红霞.TPS法测定泡沫铜/石蜡复合相变材料热物性[J].太阳能学报,2010,31(5):604-609.
[15]MALKIN S.Thermal Aspects of Grinding:Part 2-Surface Temperatures and Workpiece Burn[J].Journal of Manufacturing Science&Engineering,1974,96(4):1184.
[16]席辉.杯形砂轮平面磨削温度场的实验研究及其仿真[D].天津:天津大学,2007.
[17]CHEN ZHEN ZHEN,XU JIU HUA,DING WEN FENG,et al.Grinding performance evaluation of porous composite-bonded CBNwheels for Inconel 718[J].Chinese Journal of Aeronautics,2014,27(4):1022-1029.
[2]Zhou Y,Pan G S,Shi X L,et al.Atomic step morphology research of LED sapphire substrate polishing surface and its periodicity[J].Optics&Precision Engineering,2017,25(1):100-106.
[3]我国成功研制重要战略半导体材料[J].机械,2015(8):12.
[4]王紫光,高尚,朱祥龙,等.硅片低损伤磨削砂轮及其磨削性能[J].光学精密工程,2017,25(10):2689-2696.
[5]高尚.超精密磨削硅片的软磨料砂轮的研制[D].大连:大连理工大学,2009.
[6]仇中军,周立波,房丰洲,等.石英玻璃的化学机械磨削加工[J].光学精密工程,2010,18(7):1554-1561.
[7]华勇.磨料磨具导论[M].北京:中国标准出版社,2004.
[8]VECCHIARELLI J A,KINISKY T G,SHELDON D A.Impregnation of grinding wheels using supercritical fluids:US,US7344573[P].2008.
[9]史兴宽,康仁科,任敬心.浸渗砂轮在刀具行业中的用研究[J].工具技术,1994(3):38-40.
[10]HICKORY G E,WHITE M J.Grinding wheel abrasive composition:US,US 5061295 A[P].1991.
[11]MA B,ZHOU X Y,LIU J,et al.Modeling and impacts of the latent heat of phase change and specific heat for phase change materials[J].Materials,2016,9(5):389-395.
[12]陈德鹏,钱春香,王辉,等.水泥基材料比热容测定及计算方法的研究[J].建筑材料学报,2007,10(2):127-131.
[13]熊梦雅,冯妍卉,冯黛丽,等.金属有机骨架复合体的相变热特性测试[J].工程热物理学报,2018(1):165-171.
[14]张涛,余建祖,高红霞.TPS法测定泡沫铜/石蜡复合相变材料热物性[J].太阳能学报,2010,31(5):604-609.
[15]MALKIN S.Thermal Aspects of Grinding:Part 2-Surface Temperatures and Workpiece Burn[J].Journal of Manufacturing Science&Engineering,1974,96(4):1184.
[16]席辉.杯形砂轮平面磨削温度场的实验研究及其仿真[D].天津:天津大学,2007.
[17]CHEN ZHEN ZHEN,XU JIU HUA,DING WEN FENG,et al.Grinding performance evaluation of porous composite-bonded CBNwheels for Inconel 718[J].Chinese Journal of Aeronautics,2014,27(4):1022-1029.