Simulation And Experimental Study On Helical Milling Process For Carbon Fiber Reinforced Plastics Hole-making

Carbon fiber composite material in the conventional drilling process is particularly evident defects,in order to obtain hole quality to meet the requirements,spiral milling hole technology came into being.In this paper,carbon fiber composite material in the hole making process exhibits a problem,as well as the processing parameters of carbon fiber composite material spiral milling bore hole quality and impact of its cutting forces launched a research study mainly divided into the following areas:In order to study the composite hole making process in the cell wall defects and factors hole wall quality,the establishment of different fiber plies direction of carbon fiber composite material single plate orthogonal cutting model,respectively,from stress,surface quality,chip topography cutting force and other aspects of the cutting direction different fiber plies of carbon fiber composites were analyzed.By studying the obtained carbon fiber composite material processing stress distribution substantially along the direction of the fiber plies.Relationship between the surface quality of the fiber plies of 0° fiber direction of the surface quality is best,90° fiber orientation followed,135° fiber direction of the surface processing of poor quality,45° fiber orientation worst.Chip topography at 00 ply fiber direction exhibit ribbon,45° and 135° fiber orientation is massive,the performance at 90° fiber orientation as a powder.Cutting force between the fiber ply angle of 0°?180° showing a variation of the sine function.From the microscopic point of view,the microscopic cutting morphology of different fiber ply angle carbon fiber composite material a study to establish the carbon fiber composite material micro structure cutting model different fiber plies direction,the main analysis of carbon fiber in different ply angles and resin matrix different from micro fracture forms and aspects of the study of the formation and surface quality of carbon fiber composite material processing defects.The results show that the fiber layer and a resin layer 0° and 45° fiber plies direction of shear fracture occurs is curved,90° and the fiber layer and a resin layer 135°ply direction of extrusion shear fracture occurs.0° fiber direction of the machined surface no obvious processing defects,45° fiber orientation appears obvious pits,90° fiber orientation glitches processing defects,135° fiber direction of the fiber pull-out phenomenon occurs.Effect of processing parameters of carbon fiber composite spiral milling hole machining process for the establishment of a three-dimensional simulation model of carbon fiber composite spiral milling holes from the amount of eccentricity and axial feed rate both respectively spiral milling hole during the hole quality and on the cutting force to study discussions,finally get through holes of different amount of eccentricity and different feed speeds,and obtained by analyzing the amount of eccentricity between 0.6mm?0.8mmmachined hole the best quality.In terms of cutting force,the eccentric amount of the X,Y greatly affect the cutting force,less impact on the axial cutting forces,axial feed rate of increase axial cutting forces,with the axial feed rate increase large axial cutting force increases.In order to verify the correctness of the simulation results and the accuracy of the final article of carbon fiber composite materials were studied spiral milling holes,and the test results obtained with the simulation results were analyzed,the results of the simulation results show that the higher the degree of agreement with experimental results,the minimum error of 1%,the maximum error of 14%.