The Study Of The Deformation During High Speed Milling Of Silicon Carbide Composites Of Aluminum (SiCp/Al) Composites Thin-walled Workpiece

Silicon carbide (SiCp/Al) aluminum matrix composite is a kind of metal matrixcomposites. It has low density, high strength, high stiffness, high toughness, highabrasion resistance and good fatigue resistance, and high temperature resistant, and theadvantages of small thermal expansion coefficient. So it is widely used in military andcivilian and other fields, such as aerospace, automotive industry, electronic packaging,optical instruments and so on. Thin-walled workpiece is low rigidity. when it is beingprocessed it is easy to produce deformation.Silicon carbide (SiCp/Al) aluminum matrixcomposite has high hardness,the tool is weared more seriously in the process.And thatlead to reduce the accuracy.So it is very difficult to cut the aluminum silicon carbidematrix (SiCp/Al) composite thin walled parts, and it is hard to put the parts intopractice.In order to study the silicon carbide aluminum (SiCp/Al) thin-walled compositemilling deformation trend, this paper study the deformation of the silicon carbidealuminum (SiCp/Al) thin-walled composite when it is milling by the finite elementsimulation and experimental. The thermal-mechanical coupled analysis of ABAQUS/Explicit module is used for milling simulation. And the milling experiments is be done.This research mainly through the simulation analysis the effect of the cutting speed,cutting width, the feed per tooth, workpiece size and the residual stress on deformationof thin-walled parts.The results show that the overall deformation of the workpiece wasu-shaped and the maximum position in the ends of the workpiece and there is smallerfluctuations in the middle of the workpiece;Deformation tendency in different speed,cutting width and feed per tooth workpiece is basically the same and when thespeed,cutting width and feed per tooth is increased,the deformation of the workpiece isincreasing and the trend increased;The deformation of the workpiece increases with thelength of the workpiece and the height increases, and decreases with the increase in thethickness of the workpiece;The deformation trend of the workpiece remains unchanged when the residual stress changes。 And when the residual stress decreases, thedeformation of the workpiece decreases;Compared whit the results of the experimentalhan simulation,the results of both are basically the same.But the value of the simulationis smaller than the one of the experimental.There is no definition of SiC particles andmatrix and the simulation did not take into account of the workpiece clamping andinitial residual stress.