Modeling of Multi-energy Field and Regulation Optimization for Electric Discharge Assisted Milling(EDAM)of Titanium Alloys
High-quality and efficient cutting of titanium alloys has always been a difficult problem in the field of machining.Although various types of thermal field assisted high-efficiency precision machining methods are applied,there was a lack of theoretical research on the coupling of multi-energy fields such as its mechanical behavior and cutting temperature,which made it difficult to regulate and optimize the process reasonably and efficiently.To address the above problems,A regulation optimization study based on the multi-energy field model for EDAM with thermal-force coupling is carried out,thus to improve the machining efficiency and quality of titanium alloys.Firstly,capacitance,speed and electrode width angle are determined as optimization variables.Then,the models of discharge-assisted temperature and cutting force for EDAM based on thermal-force coupling are developed.Meanwhile,the influence of optimized variables on the processing characteristics of EDAM is analyzed based on response surface methodology(RSM)to determine the optimal parameter combinations.Finally,the accuracy of the theoretical model and the validity of the optimization results are verified by a series of EDAM experiments of titanium alloys.The results show that through the optimization of the theoretical model to regulate the multi-energy field during EDAM machining,the cutting force and surface roughness of EDAM are reduced by 52.7％and 80％,respectively,compared to conventional milling(CM).
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