Optimization Of Milling Tool Parameters For SiCp/Al Composites And Experimental Study Of Low Temperature Micro Lubrication

SiCp/Al composites play an important role in aerospace,military,electronic and other fields due to their high specific stiffness,specific strength,high temperature and corrosion resistance and a series of excellent properties.However,due to the excellent physical properties of Si C particles in reinforcement phase,SiCp/Al composites are typically difficult to be machined.In the process of cutting,problems such as poor machined surface quality and severe tool wear,which seriously hinder the machining efficiency of SiCp/Al composites.Therefore,this paper aims to improve the degree of tool wear and improve the surface quality of SiCp/Al composite materials.Finite element simulation software ABAQUS is used to simulate the cutting process,and lowtemperature microlubrication technology is applied in the processing process to improve the surface quality and reduce tool wear.First of all,due to the special properties of SiCp/Al composite materials,in order to improve the research efficiency,further explore the special removal of materials during the cutting process,and establish a simplified model of SiCp/Al composite materials.Secondly,use ABAQUS simulation software to model the aluminum alloy matrix and Si C particles separately,establish a two-dimensional simulation cutting model of SiCp/Al composite material,use the tool angle as a variable,and study the effect of the tool angle on the stress and strain,temperature field distribution and cutting force Based on the results and comprehensive consideration of tool life and actual application areas,the tool angle can be optimized.Subsequently,a milling test was carried out,and the cutting force was used as the standard to verify the accuracy of the simulation results.Then,the milling test was performed with the tool after the geometric angle was optimized to study the influence of cutting parameters(cutting speed,feed,depth of cut)on the surface roughness,and the processing environment was used as a variable to analyze the effect of different environments on the surface roughness.The law of influence.According to the special removal form of SiCp/Al composite material,three kinds of Si C particle removal process models were established to study the micro morphology of the processed surface under low temperature and trace lubrication environment.Finally,in order to solve the problem of tool wear in SiCp/Al composite cutting,the wear morphologies of different parts of milling cutters under cryogenic minimum quantity lubrication and dry were observed on the premise of obtaining the best surface quality.The influence of processing environment on tool life and wear degree was analyzed and the wear mechanism was studied.