Surface Temperatures in Grinding
Surface Temperatures in Grinding
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DOI：
10.1115/1.4015689
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发表时间：
1952-01
期刊：
影响因子：
--
通讯作者：
J. Outwater;M. Shaw
中科院分区：
文献类型：
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作者：
J. Outwater;M. Shaw
将运动热源传热理论应用于磨削过程，得到磨削表面平均温度的计算公式。该方程预测，对于代表性的精磨操作，表面温度高达3000 F。分析表明，在精磨的表面温度降低，通过减少切屑深度，但在钩住操作的表面温度可能会降低，通过增加切屑深度。介绍和讨论了用工具热电偶技术获得的切屑和砂轮之间的平均温度的代表值。实验数据说明了磨削气氛在产生火花和确定磨削能量中的作用。当气氛中的氧浓度很低时，比磨削能被发现异常高。在精磨操作中存在高表面温度，这通过存在主要为残余奥氏体的转化表面层来证明。
Heat-transfer theory involving a moving heat source is applied to the grinding process to obtain an equation for the mean surface temperature in grinding. This equation predicts surface temperatures as high as 3000 F for a representative fine grinding operation. The analysis shows that in finish-grinding the surface temperature is reduced by decreasing the chip depth of cut but in snagging operations the surface temperature may be reduced by increasing the chip depth of cut. Representative values of the mean temperature between the chip and the grinding wheel obtained by the toolwork thermocouple technique are presented and discussed. The role of the grinding atmosphere in the production of sparks and in determining the energy involved in grinding is illustrated by experimental data. When the oxygen concentration of the atmosphere is very low, the specific grinding energy is found to be unusually high. The existence of high surface temperatures in fine grinding operations is demonstrated by the presence of a transformed surface layer that is largely retained austenite.