Study On Laser Assisted Micro-cutting Technology Of High Volume Fraction Aluminum Matrix Composite

High volume fraction aluminum-based composites have received great attention in the fields of aerospace,automotive,and electronics due to their excellent comprehensive properties in recent years.Scholars have done a lot of research on the development and application of aluminum-based composites.With the requirement of manufacturing and the rapid development of science and technology,the machining precision and size requirements of workpieces are becoming higher and higher.Traditional machining techniques have been meet the demand for the materials such as aluminum-based composite materials difficultly.Aluminum-based composite materials have low efficiency,poor processing,and severe tool wear under conventional cutting methods.Therefore,laser-assisted machining is an effective method to solve the problems such as high cutting force and heat,and severe tool wear in conventional machining of difficult-to-machine materials.Laser-assisted machining technology has the characteristics of low cost and high machining efficiency.Compared with plasma arc,oxyacetylene flame and other heat sources,laser assisted machining technology takes high energy laser beam as heat source,which has the advantages of high energy density,accurate and rapid heating process,adjustable spot size and so on.Based on the research background of laser-assisted machining technology,the simulation and micro-cutting experiment of laser-assisted machining process of high volume fraction aluminum matrix composite are carried out.The research mainly include:Firstly,the laser-assisted micro-cutting simulation temperature field model was established by using ABAQUS software,and it predicts the cutting temperature field under different cutting parameters accurately.The simulation results was used as the basis of temperature field optimization control in laser-assisted micro-cutting experiment.The experimental results show that the cutting force and cutting temperature in conventional cutting and laser-assisted micro cutting are accurately predicted.Secondly,the temperature field of the micro-cutting process was measured by using the laser-assisted orthogonal micro cutting experimental device,and the influence rules of different parameters on the distribution of material heat affected zone and tool wear were analyzed.Finally,the influence of various cutting parameters on surface integrity under laser-assisted micro-cutting of typical high volume fraction aluminum-based silicon carbide composites was studied,and changes in surface roughness,surface morphology,surface residual stress,and surface micro-hardness were analyzed.Through the study of the above content,it achieves the purpose of control the temperature of the laser-assisted micro-cutting process of aluminum based silicon carbide,optimize the process parameters,improve the surface quality and machining efficiency,and reduce the tool wear.