Forming Analysis And Mold Design Of Advanced High Strength Steel Automobile Panel

The automobile industry develops rapidly nowdays. It is important for China to develop new products to ensure that China can continue to enhance the international status of the automobile industry in the competitive market environment. Since the development of the car becoms safer, more environmental and higher cost of fuel, high strength steel is more intense in the needs of the automotive industry, accelerating the car lightweight process. Especially DP steel sheet of superior forming performance gains more and more auto companies attention.However, the core technology of automotive was lacked in China. High strength steel molding process and mold development were technical difficulties in many companies. The high strength steel was only applied to some simple parts. So what the most important to car manufacturers was to develop the reasonable and efficient process design, to develop and design high strength steel molds and to control forming quality measures. This paper completed left and right sides sill reinforcement boards of DP780 products panel forming process and mold development, based on Shandong Xiaoya Precise Machinery Co., Ltd. This thesis provided a reference for the development of high strength steel molds and technology programs.In this paper, high strength steel DP780 was made advanced materials performance tests to attain the material properties. Parts stamping characteristic was analyzed and the initial process plan was gotten, based on the structural characteristics and tolerance requirements of the left and right sides sill reinforcement boards of DP780 products panel. Then this paper analyzed and designed stamping direction, addendum plane, binder, drawbead, blank shapes, trimming line and springback compensation depending on AutoForm. The initial process scheme was adjusted and optimized and the final process plan was determined. Finally, the three-dimensional DL drawings were completed. After the completion of each steps of the mold design, this paper finished the mechanical analysis, trimming gap calculation, trimming insert design, punch and die design and waste disposal design depending on the trimming punching process. BOM tables and two-dimensional drawings were accomplished. Solutions to debugging problems were given in mold assembly and debugging process. In this design process, a variety of advanced methods were used, ARGUS that was the three-dimensional optical strain measurement used for strain analysis and calibration to finite element simulation. The current mold had been delivered to the customers and the product had been successfully put into production.