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

Grinding occupies the important position in machining, it is usually used forprecision and ultra-precision machining. With the rapid development of manufacturingindustry, traditional grinding cannot meet the need of current manufacturing. Thesuperficial abrasives of the traditional grinding wheel have no regular pattern, whichwill block grinding wheel、generate grinding burn、reduce machining quality andshorten the lifespan of wheel. Related researches have proved that the effect of grindingwheel with ordering pattern is better than traditional disordering grinding in all aspects.However, no further researches about grains pattern are studied. This paper appliesphyllotaxis theory in grains pattern and successfully makes several CBN wheels withordering pattern which have different phyllotaxis coefficients. The distribution ofwork-piece temperature is studied by simulation under different grinding conditions andphyllotaxis coefficients.Firstly, this paper designs the phyllotactic pattern wheel model on the basis of thephyllotaxis theory and makes the grinding wheel. We do the research on the method ofthe critical process which consists of the CBN wheel exposure and the abrasives addingmethod. The intensity of light、the distance which is between mask and light source andthe exposing time all affect exposure result. The best exposure scheme is confirmedthrough many experiments. By using the method of subsection adding abrasives, weapply falling abrasives method to cylndrical surface. In spite of time-consuming, it canensure working efficiency. By conducting electroplating experiments, wheels whichkeeps high holding strength for abrasives and has good regularity of distribution aredesigned.Secondly, by analyzing the phyllotaxis pattern theory and the generationmechanism of grinding temperature, the relationship between the phyllotaxiscoefficients and grinding temperature is researched. Researches have proved that the critical factors which affect the cylindrical phyllotaxis pattern are phyllotaxis angle andphyllotaxis coefficients. Phyllotaxis angle is set to137.508°and phyllotaxiscoefficients determine the number of abrasives. By using numerical analysis method,the relationship between the phyllotaxis pattern and the remarkable slope curve areobtained. The position of the four abrasives could be confirmed and interferenceanalysis is done for those grains. Then the grinding effective rate is obtained, and thegrinding force are obtained. By using matlab, we analyze the relationship of the cuttingposition between two adjacent grains in one common tangent plane and get therelationship between the contact arc length and the phyllotaxis coefficients. We applythe grinding force and the contact arc length to the calculation of grinding temperaturefield.Finally, by using the finite element analysis software ANSYS, we simulate thegrinding temperature field. By discretizing the forward process of grinding wheel, itapplys moving heat source and then get the grinding temperature distribution diagram.By conducting simulation on different conditions of grinding, we can analyze the thereason of the change. By observing the temperature field on different phyllotaxiscoefficients, we can adjust the phyllotaxis coefficients to avoid grinding burn andenhance processing quality and the life of wheels.