Fine Blanking Technology Optimization Of Front End Cover Of Timing System For Compressed

The car timing system cover is one of the key components of the car engine timing system.As the end cover forming complex,requiring extrusion and fine punch in the same station to complete the use of ordinary punching processing methods,on the one hand it is difficult to achieve the accuracy of parts processing requirements,on the other hand the mold life is very low.Therefore,the use of composite fine blanking process to carry out the production of end covers,the use of composite fine damping mold,can be in a stamping stroke to get a high dimensional accuracy,high proportion of high belt,small deformation of forming parts.In the actual production,the composite fine forming has been widely used in the production of the timing system cover.In the process of precision punching,the load of the mold is much larger than that of the ordinary punching process.According to past production experience,it is not only time-consuming,but also the quality of the forming products.In order to improve the production quality and production efficiency of the end cover,it is often necessary to try many times to improve the process parameters.It is clear that this trial method increases the product trial cycle and increases the cost of manufacturing.In this paper,the finite element analysis method is used to modify the process parameters directly in the finite element model,which can quantitatively analyze the influence of each process parameter on the forming quality and lay the foundation for optimizing the process parameters.In this paper,the basic theory of rigid-plastic finite element method is analyzed,as well as the changes of stress and strain in the forming process are analyzed.The 3D model of the fine blanking die of the end cover was established by Pro / E software.Then the finite element software DEFORM-3D was used to simulate the finishing process.The process parameters were continuously improved in the simulation process,and the influence of different process parameters on the forming quality was obtained.The orthogonal design test was used to analyze the change of forming quality under the action of various process parameters,and the combination of process parameters with good forming quality was obtained.Then the wear analysis of the mold was carried out,and the wear analysis model of the mold was established.The influence of the mold hardness,the friction coefficient and the blank holder force on the mold wear was analyzed.Finally,the trial test was carried out,and the correctness of the finite element analysis and mold wear analysis was verified by the test production.The mold hardness was improved by the heat treatment process,as well as the service life of the mold,which had a certain guiding role to the selection and application of the forming process of the parts.