The Experimental And Simulation Study On Form Grinding Technology In Carburized And Quenched20CrMnTi

Carburized and quenched20CrMnTi is good performance steel of carburized andhardened surface,has hard and wear-resistant surface and tough core after carburizedand quenched, high impact toughness of low temperature, weldability of medium,good cutting performance after normalizing, good machinability, fatigue-resistantperformance is quite good, which widely used in the manufacture of automobiles,aircrafts and large-scale mechanical systems such as gears, shafts, piston-typeparts.The existing high-precision hard tooth surface gear grinding method isordinarily generating method which has a low processing efficiency,but formingmethod of grinding with high efficiency and high accuracy, is gradually applied. Atpresent, not much research on form grinding technology,andform grinding parameteroptimization problem is not completely solved.The temperature in the form grindingprocess greatly influences the surface quality of the workpiece and the use ofperformance, and also affects the service life of grinding wheel. This article throughthe derivation of form grinding force formula, based on the rough grinding and finegrinding technology orthogonal test, find out the optimizing process parameters, so asto improve the grinding process of the productivity, reduce the production cost.Simulate and predict the temperature of form grinding according to the grindingprocess parameters,in order to avoid grinding burn. In this paper, the main researchcontents are as follows:(1) Analysed the force and the temperature in form grinding.Based on Planegrinding force theory, obtain the grinding force formula of form grinding though thegeometric modeling and mathematical formula derivation. Analysed the triangle heatsource theory in temperature field of grinding area and wet grinding temperature fieldheat distribution ratio theory,which provide theoretical support for simulation oftemperature field by ANSYS.(2) Through the orthogonal test of form grinding, calculate the relational degreebetween coarse grinding parameters and unit tangential grinding force by using greyrelational analysis method. Analyse the fine grinding parameters when surfaceroughness is minimum by using polar difference analysis method. Though thegrinding test which use the optimized parameters in different V shape groove to verifythe processing surface quality meet the requirements. (3) grinding temperature field are simulated and analysed through ANSYSsimulation software,and compare the difference between simulation temperature andtest temperature under the condition of different grinding parameters, compare thechang curve about time between simulation value and test value, analyse the differentphase about that curve.In short, by using orthogonal test method, based on the theory of form grindingforce to find out the optimized coarse and fine form grinding parameters，and verifythe surface grinding quality of V shape groove;According to the grinding field heatflow distribution model and coarse grinding parameters and measured force in thegrinding process, the temperature field of form grinding are simulated and analysed.