Presidential Young Investigator Award: Thermal Aspects of Grinding

本文主要研究金属磨削过程中的换热问题。将对研磨区和流体之间的对流换热进行分析。这种分析很困难，因为几何形状复杂且定义不明确，流体渗透到研磨区的程度不确定，产生的热量在一定程度上取决于流体类型。砂轮被模拟为含有磨削液的多孔介质。充满流体的砂轮和工件处于相对运动状态，在它们的界面处产生热量。分析表明，磨削区温度的初步实验测量结果与分析结果非常吻合。研究计划提供了加工参数与磨削功率之间的关系。由于可以在磨削过程中监控磨削功率，因此可以自动调整操作参数，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.