Algorithm Research And System Development Of High Strength Steel Springback Geometry Compensation Based On CATIA

With the trend of automobile lightening, high strength steel has been widely used inautomotive body parts manufacturing. The mechanical properties of high strength steel isdifferent from ordinary low carbon steel, so the problem of springback appeared in thestamping production is very prominent, and it’s hard to be solved, which seriously impactson the car body processing and assembly. The control of high strength steel stampingspringback basically have two kinds of methods: one is the process control method, andthe second is geometry compensation method. The process control method can reducespringback to a certain extent, but it can’t eliminate the springback fundamentally, andmould surface geometry compensation method can theoretically solved the springbackproblem. In recent years researchers have proposed many effective compensationalgorithms to compensate mould surface, which are based on grid form. If mouldcompensation surface of3d geometric form can be quickly and accurately obtained, it willbe able to have important guiding significance in the high strength steel stampingproduction.This research is one part of National Science and Technology Major Project named:"Development of steel plate stamping simulation software and research of servo pressprocess and springback control"(NO.2010ZX04014-072). The paper has studied highstrength steel plate stamping springback geometric compensation algorithm, and based onCATIA V5platform developed high strength steel plate stamping springback geometriccompensation system, which can rapidly make springback geometric compensation formould surface.The paper briefly introduced the high strength steel and its production andapplication at home and abroad at present, compared and analyzed the advantages anddisadvantages of the springback control and compensation algorithms of the high strengthsteel stamping, proposed to develop stamping springback geometric compensation systembased on CATIA platform, which can directly make compensation for mould surface, andimprove the efficiency of the mould design. In order to make compensation for mouldsurface directly on CATIA platform, this paper puts forward a method based on UV line of rotation deformation springback geometry compensation algorithm. The algorithmdisperses surface using its original UV attributes, translates surface rotation deformationin three-dimensional space into discrete point rotation deformation in two-dimensionalplane through the section surface, and makes surface reconstruction with the direction ofthe original surface UV after discrete point deformation. In order to meet the stampingmanufacturability, this algorithm has also solved the transition surface processing and thespringback compensation correction problems. The paper further studies the surfacereconstruction technology and parametric association design technology; guarantee themould surface after springback geometry compensation can maintain the topologicalrelations and geometric continuity before compensation. Ultimately the paper fullyimplement the system function, and has developed high strength steel stampingSpringback Geometric Compensation System based on CATIA.CATIA-SGCS system makes full use of CATIA strong surface modeling function,can quickly get high quality mould geometric compensation surface, and keep thetopology relationship and surface continuity before compensation, which can be directlyapplied to the production practice. Based on a large number of analysis of high strengthsteel parts, the system is verified to be feasible and effective.