Presidential Young Investigator Award: Thermal Aspects of Grinding

本文主要研究金属磨削过程中的传热问题。将开始对磨削区和流体之间的对流传热进行分析。这种分析是困难的，因为几何形状复杂且定义不清，流体渗透到磨削区域的程度是不确定的，并且产生的热量部分取决于流体类型。将砂轮模拟为含有磨削流体的多孔介质。充液轮与工件处于相对运动状态，在两者的界面处产生热量。分析结果与磨削区温度的初步实验测量结果吻合良好。研究计划可以提供工件表面温度与操作参数和磨削功率之间的关系。由于在磨削过程中可以监控磨削功率，因此可以自动调节操作参数以降低温度，避免热损伤。

This research is focused on heat transfer in metal grinding. An analysis of the convective heat transfer between the grinding zone and the fluid will be initiated. This analysis is difficult because the geometry is complex and poorly defined, the degree of fluid penetration into the grinding zone is uncertain, and the amount of heat generated is partly dependent on the fluid type. The grinding wheel is modeled as a porous medium containing the grinding fluid. The fluid-filled wheel and the workpiece are in relative motion, and heat is generated at their interface. The analysis shows very good agreement with preliminary experimental measurements of the grinding zone temperatures. The research planned can provide a relationship for the workpiece surface temperature in terms of the operating parameters and the grinding power. Since the grinding power can be monitored during the grinding process, the operating parameters can automatically be adjusted to lower the temperature to avoid thermal damage.