窄深槽磨削加工过程的热分布研究

为了对窄深槽磨削温度进行深入研究,通过将砂轮与工件的接触区分为顶刃区和侧刃区,对窄深槽底面和侧面分别进行温度研究。在窄深槽磨削中,顶刃区热流服从形状函数 分布,侧刃区服从浅磨的磨削特点,且窄深槽底面和槽侧面在磨削过程中受到多个磨削热源的耦合作用,据此建立了窄深槽底面和槽侧面的磨削温度理论模型。采用K型热电偶测量了窄深槽底面和和侧面的磨削温度,通过试验对磨削温度理论模型的有效性进行验证。研究结果表明：窄深槽底面和侧面受到多个磨削热源耦合作用,直接作用于加工面的磨削热源对加工面的温度影响最显著；窄深槽试验测量温度与理论计算值表现出良好的一致性。

Research on Heat Distribution in Narrow-deep-groove Grinding Process

In order to further study the grinding temperature of the narrow-deep-groove, the contact area between the grinding wheel and the workpiece was divided into the top edge section and the side blade section, and the temperature of the bottom and side of the narrow-deep-groove was studied separately. During narrow-deep-groove grinding, the heat flow in the top edge section obeys the shape function distribution, the side blade section follows the grinding characteristics of shallow grinding, and the bottom and side surfaces of the narrow-deep-groove are coupled by multiple grinding heat sources during the grinding process. Based on this, a theoretical model of the grinding temperature of the bottom and side of the narrow-deep-groove was established. K-type thermocouples were used to measure the grinding temperature of the bottom and side of the narrow-deep-groove. The validity of the theoretical model of grinding temperature was verified by experiments. The results show that the bottom and side of the narrow-deep-groove are coupled by multiple grinding heat sources, and the grinding heat source that directly acts on the machining surface has the most significant effect on the temperature of the machining surface; The measured temperature value of the narrow-deep-groove grinding experiments showed good agreement with the theoretical calculation value.