Research On The Stamping Process Of The Sliding Door Inner Panel Of Automobile Based On Autoform

The development and production of automotive panel has been the most important aspect of the development of new models. In addition, the quality of automotive panel is an important indicator of the car’s overall quality. Owing to auto cover’s complex geometry shape, large size and defects prone to forming in the stamping process, dies that designed only by the experience of engineers are difficult to meet the technical requirements of the product sometimes. Throughout the development of automotive products, CAE can be used to analyze the stamping performance of automobile body, judge the reasonability of the design and improve the structure. Besides, it also can be used to optimize the process parameters and solve the wrong stamping process judgment made by less experienced engineers. Therefore, automotive panel stamping simulation technical has important significance in improving the quality of die design, shortening the development and manufacturing cycle of new models, reducing costs, enhancing market competitiveness, etc.In this paper, the sliding door inner panel of Foton Company a project is used as the research object, which are stamping process and numerical simulation.Firstly, the stamping steps which are determined after analyzing its structure features are drawing, trimming and punching, flanging shaping, side punching and side flanging. Using the Autoform software, many parameters can be set such as drawing process parameters which contain drawing direction, addendum, binder surface and blank size and so on and trimming process parameters which contain trimming direction and trimming line of the second step and others. In addition, it also can simulate the stamping forming process of th-e sliding door inner panel without drawbeads and analyze the results.Secondly, the impact of drawbeads should be considered, and nine orthogonal experiments of three factors and three levels are designed based on the three important factors affecting stamping quality (blank holder force, drawbeads, friction coefficient). It is vital to simulate all the nine experiments separately and analyze and compare their forming results to get the optimal process parameters. Ultimately, it determines that the project three is the optimal one.Finally, DL diagram, drawing process diagrams and trimming process diagrams are designed by the guidance of the optimal process parameters. Afterwards, the drawing and the trimming die structures are designed based on the DL diagram and the standard parts are assembled by UG software.