应用有限元法的磨齿过程热状态研究

The heat state study of gear grinding based on FEM

磨齿加工不但在工件表面产生较高的温度,而且还会在工件表层内产生梯度很大的温度场,这是形成磨削残余应力以及造成磨齿工件表层金相组织变化的主要原因。因此,正确地确定工件表层内的温度场及表面温度,能够预测磨齿残余应力,了解表层金相组织变化,进而可合理运用磨齿工艺,进行表面质量控制。采用的有限元法为磨齿过程热状态分析提供了一种全新的研究方法。

Gear grinding not only produces high temperature in workpiece surface,but also produces great grads in its inner,it is the primary reason of grinding remnants stress. Confirming the inner temperature field and the surface layer temperature of workpiece correctly, can realize the metallic organic change and forecast remnants stress of workpiece. It is the basis of exercising gear grinding technics logically for controlling surface quality. The research provides a new method on heat state analysis of gear grinding.