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| 1 | Grinding temperature and energy ratio coefficient in MQL grinding of high-temperature nickel-base alloy by using different vegetable oils as base oil显示文摘Vegetable oil can be used as a base oil in minimal quantity of lubrication(MQL). This study compared the performances of MQL grinding by using castor oil, soybean oil, rapeseed oil, corn oil, sunflower oil, peanut oil, and palm oil as base oils. A K-P36 numerical-control precision surface grinder was used to perform plain grinding on a workpiece material with a high-temperature nickel base alloy. A YDM–III 99 three-dimensional dynamometer was used to measure grinding force,and a clip-type thermocouple was used to determine grinding temperature. The grinding force, grinding temperature, and energy ratio coefficient of MQL grinding were compared among the seven vegetable oil types. Results revealed that(1) castor oil-based MQL grinding yields the lowest grinding force but exhibits the highest grinding temperature and energy ratio coefficient;(2) palm oil-based MQL grinding generates the second lowest grinding force but shows the lowest grinding temperature and energy ratio coefficient;(3) MQL grinding based on the five other vegetable oils produces similar grinding forces, grinding temperatures, and energy ratio coefficients, with values ranging between those of castor oil and palm oil;(4) viscosity significantly influences grinding force and grinding temperature to a greater extent than fatty acid varieties and contents in vegetable oils;(5) although more viscous vegetable oil exhibits greater lubrication and significantly lower grinding force than less viscous vegetable oil, high viscosity reduces the heat exchange capability of vegetable oil and thus yields a high grinding temperature;(6) saturated fatty acid is a more efficient lubricant than unsaturated fatty acid; and(7) a short carbon chain transfers heat more effectively than a long carbon chain. Palm oil is the optimum base oil of MQL grinding, and this base oil yields 26.98 N tangential grinding force,87.10 N normal grinding force, 119.6 °C grinding temperature, and 42.7% energy ratio coefficient. | Li Benkai Li Changhe Zhang Yanbin Wang Yaogang Jia Dongzhou Yang Min | 2016 | Chinese Journal of Aeronautics2016，29，4： | 20 |
| 2 | 磨削温度场建模及热传递分析与实验验证显示文摘以磨削原理为基础,分别建立了干磨削、湿磨削和纳米粒子射流微量润滑磨削的温度场理论模型,分别对各种冷却条件下的温度场进行热量的传递分析。借鉴强化换热理论,分析了纳米粒子射流的导热特性,并对纳米粒子射流微量润滑磨削温度场能量的分配进行分析,理论推导出由砂轮/工件界面传入工件的能量比例系数及工件平均表面温度,用4种冷却方式进行磨削实验,分别通过红外热像仪和测力仪测得工件的表面温度和切向磨削力,并计算出传入工件的能量比例系数,证实浇注式磨削能量比例系数最低,其次为纳米粒子射流微量润滑磨削,分别为40.06%和46.47%。 | 张东坤 李长河 贾东洲 张彦彬 | 2015 | 制造技术与机床2015，，4： | 2 |
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