| Side surround before reinforcing plate extends board is a component before one certain type of car. Because the parts around the bus with two piece, so it is commonly processing two parts together. The machining processes basically has the following four steps:tensile, trimming and punching, Flanging and plastic, cut and flanging. Dongfeng mould pressing technology Co, LTD find the parts in the first process, produced the following obvious defects:wrinkling, rebound, and ripping. According to these defects, The traditional method is mainly based on the experiences, just through the test mode, repairing mold, try mold, then fix mode cycle to solve these defects. This method not only have low production efficiency, but also make the accuracy of the mould can not reach the expected requirements, still can lengthen the development cycle of mould, waste power, financial and material resources.With the developing of the numerical analysis technology, the plastic forming theory, stamping technology and computer ability, numerical simulation is applied in sheet metal stamping forming technology and optimization more and more widely. Based on the sheet forming characteristics and plate forming numerical simulation technology on forming process simulation and optimization, can predict the sheet metal forming process, rupture appears wrinkle defects; can predict the sheet forming process of stress and strain distribution, forming process required load; can compute the workpiece rebound residual stress; can more accurately analysis of various process parameters on the influence of forming process, etc. So, using the numerical simulation technology can not only improve the production efficiency, but also can save the cost of production.This topic is surrounded by research on technology of side surround before reinforcing plate extends board, using finite element analysis software AUTOFORM forming process for its pull delay on simulation, finding the best technical parameters,so as to elimina te its combination of various defects in forming process. And for these parameters optimization, Then with optimized parameters to mould the appropriate modification, finally the amendment good mold assembly to presses, adjust good press parameters, debugging again to verify the parameters obtained from the simulation was correct. Through this process, not only side before reinforcing plate extensions board surrounded in the forming process of pulling delay, eliminate the defects of the traditional method to solve technical problems and stamping mould design also settled, but also in the process, summarized a set of suitable methods for the production of the enterprise, provides the necessary help. |
