超高速点磨削砂轮的设计与磨损仿真

文章详细阐述了超高速点磨削中砂轮的应用状况,介绍了超高速点磨削砂轮的应用范围,通过这种新型砂轮的基体和cBN磨料层的设计,介绍了砂轮基体和磨料层的设计原则,介绍了cBN磨料层中粗磨区和精磨区中的磨料对于去除材料的磨削效率的作用,引入了这种新型砂轮中的粗磨削区倾角的概念,推导出粗磨削区倾角的大小在超高速点磨削中对于磨削参数的影响趋势,并且设计了适用于本实验的粗磨削倾角的大小,制造了适用于超高速点磨削实验的砂轮,介绍了由于粗磨削倾角的存在对磨削时切屑的流动状态及倾角对于磨削效率的影响,利用超景深显微镜观测砂轮磨料层的微观结构,分析表面的气孔率和cBN磨料的分布状态,通过磨粒的分布预测加工后的表面形貌,仿真出新型砂轮的磨损趋势,得出了有关超硬磨粒层制造和磨损的相关结论,砂轮的制造与设计直接关系超高速点磨削的广泛推广,为实现超高速点磨削的高效率和高精度的加工提供必要的设备支持,为其理论研究提供可供参考的依据。

Design and wear simulation of the grinding wheel used in super-high speed point grinding

In the paper,the application status and applied scope of the grinding wheel used in super-high speed point（SHSP） grinding is introduced in details. Through designing the base and the cBN layer of the new wheel,the designing principle is inferred according to the specific shape.the grinding productivity is analyzed in the course grinding zone and the finished grinding zone,introducing the angle of course grinding field,which affects the grinding parameters in SHSP grinding,the value of the angle is designed to be suited to the point grinding,and manufacturing the wheel,introducing the changed state of chip flowing grinding used in the new wheel,the micro-surface of the wheel is observed through microscope,whose the ratio of air hole and the layer of CBN are analyzed,simulating the wear trend of the new wheel,the conclusions about super hard abrasives and wearing are drawn at last,the application of SHSP grinding is related to designing and manufacturing of the wheel,which provides the equipment for realizing high precision and productivity processing and offers the referred basis for the theoretical research.