Research On The Grinding Temperature Field Of Difficult-to-Machine Materials With Engineered Grinding Wheels

As a widely used machine manufacturing process,grinding plays an increasingly important role in the modern machinery manufacturing industry.It has become one of the most important precision and ultra-precision machining methods.And the role in the new material processing, military and aerospace and other areas is particularly prominent.The abrasive of conventional grinding wheel is often a random arrangement of state.This makes the abrasive that removes the material only a small part of the total amount of it.A large number of surplus abrasive not only can not play the role of grinding,but will decreases the grinding wheel surface crumb space.This also makes the debris not able to discharge in time,so that wheel clogging is not conducive to the flow of grinding fluid,This eventually leads to abrupt temperature rise in the grinding zone and grinding bums,resulting in a reduction in the surface quality of the workpiece and the service life of the grinding wheel. How to arrange the abrasive grains on the surface of grinding wheel and optimize the space of grinding wheel to increase the number of abrasive grains involved in the grinding process and finally improve the grinding performance of the grinding wheel and reduce the grinding temperature are focused in the grinding areas.In this paper, we first apply the theory of ordered arrangement to designing and fabricating the new grinding wheels, and realize the orderly arrangement of the abrasive grains on the grinding wheel surface.The mathematic model of creep feed grinding temperature by engineered grinding wheels are established by means of choosing suitable heat source and heat distribution model and combining order arrangement theory with grinding principle.Secondly, in this paper, the grinding temperature field model of engineered grinding wheels is simulated by simulation software MATLAB.The surface temperature and the temperature at different depths under the grinding surface by the engineered grinding wheel with abrasive of random, array, phyllotactic and staggered configuration are analyzed.The influence of grinding depth on the temperature field of creep feed grinding is analyzed.The results show that the grinding temperature of the grinding wheel with abrasive phyllotactic pattern was the lowest in the same conditions.With the increase of the grinding depth, the peak surface temperature of creep feed grinding tends to decrease.At last, the experimental study on the grinding temperature by the engineered grinding wheels is carried out.Through the overall design of the experimental scheme and the choice of temperature measurement method, the peak surface temperature and the temperature at different depths under the grinding surface by the engineered grinding wheel are measured, and the grinding performance of the grinding wheel is analyzed.By changing the grinding parameters, the effect of grinding parameters on grinding temperature is studied.The experimental results show that the grinding temperature can be reduced significantly and the grinding performance can be improved by the arrangement of abrasive on the grinding wheels.