超高速磨削过程中磨削热分布率的研究

摘要

Based on the theoretical model of grinding heat distribution rate in the past, A new method for calculating the rate of grinding heat distribution is presented. Ultra high speed grinding experiments of GCr15 bearing steel with super high speed grinding machine are carried out. The grinding force and the surface grinding temperature data of the workpiece are obtained. And analyzed the data , discussed the relationship between the grinding force, grinding temperature and grinding wheel line speed and grinding depth.Calculate the heat distribution rate R, The experimental results show that the value of R increases with the speed of the grinding wheel. Change the law is more obvious, is the first sharp rise, and then slow down, At the same grinding wheel line speed, he heat distribution rate R showed a decreasing trend with the increase of the grinding depth, but the decrease was not large.%基于过去的磨削热分布率理论模型,提出了一种计算磨削热分布率的新方法,用超高速磨床对GCr15轴承钢进行了超高速磨削实验,得到了磨削过程中的磨削力与工件表面磨削温度数据,并对数据进行分析,探讨了磨削力、磨削温度与砂轮线速度、磨削深度的关系,计算出热量分配率R,实验证明R的值随着砂轮线速度的增加,变化规律比较明显,都是先大幅上升,然后缓慢下降,在相同砂轮线速度下,热量分布率R随着磨削深度的增加呈现下降的趋势,但是降幅不大.