超高速磨削过程中磨削热分布率的研究  

Study on the Rate of Heat Distribution in the Process of Ultra High Speed Grinding

作　　者：刘晓初[1,2] 赵传[1,2] 覃哲[1,2] 周佳华[1,2] 周文波[1,2] 代东波 

机构地区：[1]广州大学机械与电气工程学院,广州510006 [2]广州大学金属材料强化研磨高性能加工重点实验室,广州510006

出　　处：《组合机床与自动化加工技术》2017年第8期5-9,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金项目:轻薄轴承超高速离心式无心磨削及表面残余应力形成机理研究(512751000)

摘　　要：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。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 GCrl5 bearing steel with super high speed grinding machine are carried out. The grinding force and the sur- face grinding temperature data of the workpiece are obtained. And analyzed the data , discussed the relation- ship between the grinding force, grinding temperature and grinding wheel line speed and grinding depth. Cal- culate 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.

关 键 词：超高速磨削 磨削热 热量分配率 

分 类 号：TH142[一般工业技术—材料科学与工程] TG506[机械工程—机械制造及自动化]