Oil Pump Cover Milling Deformation Analysis And Optimization Of Cutting Parameters

Automotive parts products in the presence of large amounts of thin- walled shell structures. Due to the complicated structure, thin wall, high accuracy and the poor fabrication procedure, it can easily be deformed and surface error under the action of cutting forces. This will seriously affect the precision and productivity of parts of the product. And it has become one of the outstanding problems that the automotive parts manufacturing industry faced. Therefore, to realize thin-walled automobile parts CNC machining deformation prediction and processing parameter optimization have important theoretical significance and application value. For the thin-walled automotive parts milling deformation problem, this article relied on research cooperation projects, combined with theoretical analysis, numerical simulation and experimental verification, on which the cutting force modeling, machining deformation and parameters optimization and other issues in-depth research.First of all, through the single factor of 2A12 aluminum alloy cutting experiment, the effects of different cutting factors on cutting force can be determined. And this will help to optimize process parameter and improve surface integrity. On the basis of single factor experiment, multi- factor orthogonal experiment scheme is adopted to investigate 2A12 aluminum alloy milling force. A predictive model is presented for the milling forces of 2A12 aluminum alloy based on multiple-regression analysis and the analysis and calculation functions of MATLAB software. And the significance test is verified. Then three milling experiment is applied to test and verify the accuracy of predictive model. Research results show that the milling force model was validated accurate and reliable comparing to milling force experiment.Then, for the thin-walled components milling deformation problem, combined with UG, Hypermesh and ABAQUS software, the finite element analysis model of 2A12 aluminum oil pump cover is established which based on milling force model in this paper. By milling deformation finite element simulation and research, the machining deformation rules of oil pump cover was obtained. Analyzed before and after applying the auxiliary support oil pump cover deformation, verify the necessity of auxiliary support, which provides the basis for the establishment of an effective control strategy deformation. At the same time, the machining deformation chart analysis showed that the deformation of the workpiece mainly caused by axial force perpendicular to the machining surface and the deformation caused by force on the length and width direct ion are small.Finally, the optimization of cutting parameters involved in the design variables, the objective function and constraint conditions are studied, and established the milling parameter optimization under several different target optimization models. For oil pump cover processing parameter optimization problem, using MATLAB genetic algorithm toolbox to solve it. Then the optimization of parameters and empirical parameters were analyzed and found that the use of optimization parameters in theory can reduce processing costs, improve processing efficiency. NC machining verification carried out. In the use of UG/CAM are simulated feed to examine the rationality of the processing and security. The results showed that: Milling parameters optimized in the actual processing of the work and the cost was basically consistent with the model. It shows that the genetic algorithm optimization method to obtain the optimal milling parameters is feasible and can achieve the desired results.