Research On Tool Performance Evaluation And Parameter Matching Based On Shape-Performance-Application Theory

Dry cutting technology has the function of environmental protection because it does not use or trace use of cutting fluid.In addition,titanium alloy is a kind of difficult material widely used in various fields.However,in the process of high speed dry cutting titanium alloy,there will be some problems such as fast tool wear rate and low machining efficiency.Therefore,the main research contents of this paper are as follows:First of all,this paper puts forward a tool "Shape-Performance-Application" integrated design theory based on parameter matching and performance evaluation.And according to the theory,an integrated tool design method based on "Shape-Performance-Application" is established.According to the tool integration method,titanium alloy(Ti6Al4V)is cut by high speed dry milling(side milling)with end milling cutter as the research object,the tool wear rate and material removal rate are used as performance indicators,the matching unquantifiable parameters of tool shape parameters and tool applicated parameters is studied.And then the matching of cutting tool parameters and cutting parameters is studied.Then,in order to reduce the slow progress and complex correlation function caused by many parameters in the research process,it is necessary to evaluate the comprehensive importance of tool parameters and cutting parameters.The numerical values of tool wear rate and material removal rate under different combination of tool parameters and cutting parameters in end milling tool side milling titanium alloy process are obtained by using finite element method and analytical method.The analytic hierarchy process and grey-fuzzy comprehensive evaluation method are used to evaluate the comprehensive importance of tool parameters and cutting parameters,and the comprehensive evaluation value of each parameter was obtained,and four parameters with the highest comprehensive importance were selected.Then,the four selected parameters are studied.Finite element method and analytical method are used to get the numerical values of tool wear rate and material removal rate of different parameter combinations at different stages.Dynamic comprehensive evaluation method is used to evaluate the level of each parameter,and the optimal value range of each parameter is obtained.Taking the performance index data of the last stage as the research object,the interaction intensity between the performance indicator and the parameters is analyzed by response surface method,and the correlation function of the performance indicator about the four parameters is obtained.Finally,according to the tool "Shape-Performance-Application" integrated design theory method,NSGA2 optimization algorithm is used to obtain the optimal solution between performance indicators and the combination of parameters,which are derived in excel form.MATLAB software and grey-fuzzy analytic hierarchy process are used to build the performance evaluation system of high-speed dry cutting tools.The optimization results are input into the performance evaluation system of high-speed dry cutting tool,the best combination of tool parameters and cutting parameters is obtained,and the reliability of these parameters is verified by finite element method and analytical method.