Stamping Direction And Its Optimization Of Automobile Panels

With the development of modern automobile industry, automobile cover design and shapedesign are highly demanded. The features of general automobile panel parts are large andcomplexly shaped. The drawing direction of the automobile cover is the most important issuefor process design. It affects not only the automotive panel drawing forming quality, but alsorelates to Binder surface and other process design. This thesis analyzed the relevant theoryand implementation of the certainty and optimization in automobile panel drawing directionunder the auspices of the Sichuan Provincial Department of Education’s key projects. It laidthe foundation for the car to cover the subsequent process design and module design.Therefore, the thesis has completed the following work:1. Process analysis of factors which influence the direction of the drawing. Factors thatinfluence the direction of the drawing process including Blank size selection, pressure surfacematerial, process added surface design, draw bead Settings and so on. The sheet metaldeformation varies in degree because of the different stamping direction. Therefore, it isnecessary to increase the size of the blank changed and choose appropriate blank sheet size forsaving material. Designing a suitable binder surface and addendum provide a good drawingcondition for drawing direction, so that it is effective to prevent damage. In different pressdirection, setting reasonable draw bead provide the required material flow resistance fordifferent parts.2. Principle and method research on the drawing direction of. The principle of drawingthe choice of direction is to ensure that the car cover can stamping achieve, there is no punchout of the reach of regional and ensure blank and protruding models that can be a very goodcontact-material flow. In this thesis, drawing direction is determined by the feature map. Wetake three-dimensional space covering drawing angle closure problem into two-dimensionallinear intersection of the problem. It is possible to generate the geometric model by graphicsand geometric analysis. The right drawing direction is found through analysis and adjustmentthe feature map.3. Optimization of the drawing direction. We consider a punch and cover rough contactarea, the size of the initial contact points even distributed the degree of dispersion of the pointsof contact, drawing depth and draw bead resistance factors and set up the optimizationobjective function. Analysis the function to optimize by taking all factors weighted coefficientand then obtain the best drawing direction.4. Implementation methods and simulation studies of drawing direction. We use UG/Open interfaces and C++programming tools to establish a needs analysis to cover the piecesof cross-section center line and the direction of drawing analysis module, analysis to avoid drawing angle closure conditions in UG. And then we integrated expressed in the feature map.We can determine drawing direction by adjusting the characteristics map. Optimizing andcalculating the direction of drawing by using the process analysis of the optimization functionand get the optimal drawing direction. We can simulation analysis With AUTOFORM to thisoptimal stamping direction. We verify that the feature map method is effective and reliable.Determining drawing direction by characteristic graphic is fast and convenient. It’s infavor of the order process to facilitate, stamping direction of correction adjustment and moldmanufacturing.