Research On The Grinding Temperature Field Of The Superhard Grinding Wheel With Phyllotactic Pattern Abrasive

As a method to achieve precision and ultra-precision processing, grinding technology has been more and more widely used in the field of mechanical manufacture. But the grinding wheel which producted by the traditional methods, the grains on its surface are in a state of disordered distribution. It causes only a little of the abrasive grain is participated in grinding work, and the grinding wheel surface could not form weel space for holding chips so that the abrasive dust can easily discharge and the flow of cooling fluid. This situation contributes to cause the grinding wheel high grinding temperature in working, and the phenomenon such as burns may be appeared on the surface of the processed material, the processing efficiency of grinding will also be reduced. Therefore, how to reduce the grinding temperature effectively and to improve the grindability of grinding wheel by using the ordered arrangements of abrasive has become a key issue to the development of the grinding technology.Firstly, the theory of phyllotaxis in botany has been combined with the grinding theory in this paper, and the grinding wheel with phyllotactic configuration of abrasive have been presented. Based on the temperature field formula of the heat source which have be known, after considering the problems of the distribution of abrasive on the grinding process region, the distribution of heat source on the contact arc, and the image of abrasive point heat source, the temperature distribution in the grinding zone of the abrasive in the manner of ordering arrangement have been achieved. Then the grinding temperature field model of abrasive with phyllotactic configuration, matrix configuration, dislocation configuration and the disordered configuration have been established respectively.Secondly, make the simulation research on the grinding temperature field by using the simulation software MATLAB. The grinding temperature of the grinding wheel which the abrasive with phyllotactic configuration, disordered configuration of grinding wheel and other patterns(matrix configuration, dislocation configuration)have been simulated respectively. The influence of the phyllotaxis coefficient h, the speed of the grinding wheel vs, the workpiece speed vw and the depth of cut ap on the grinding temperature have been analyzed, and the grinding temperature of the grinding wheel which the abrasive with different configurations have carried on the comparative study. The simulation results show that, the grinding temperature of the grinding wheel which the abrasive with phyllotactic configuration is lower than the abrasive with other ordering configurations.Finally, make the research on the grinding performance of the superhard grinding wheel which the abrasive with phyllotactic configuration. The grinding temperature of the superhard grinding wheel which the abrasive with phyllotactic configuration in the process of grinding have been measured by constructing the experimental temperature measuring platform, and after comparing with the grinding temperature results of the superhard grinding wheel which the abrasive with common configurations, studies and analyzes the influence of the temperature on the workpiece surface by different phyllotaxis parameters h and grinding parameters(such as the speed of the grinding wheel vs, the workpiece speed vw and the depth of cut ap). The results show that the temperature on the workpiece surface can be lower by choosing the phyllotactic configuration grinding wheel, and it can avoid the grinding burns, improve the quality of machining and service life of the grinding wheel.