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研究了304不锈钢薄板在拉深成形过程中产生破裂的原因及改善措施。将智能化控制系统应用在拉深实验中,相对于传统的拉深工艺研究,使其拉深工艺参数得到精确控制。实验结果表明,在冲压速度、润滑条件等相同的条件下,对于厚度为0.28 mm的钢板,直径为Φ45.1 mm的坯料最佳压边力为80 kN,直径为Φ44.5 mm的坯料最佳压边力为60 kN,这一结果与模拟趋势也基本吻合。在一定范围内,通过增大压边力,可以改善筒形件在成形过程中的起皱缺陷,解决在拉深成形过程中304不锈钢薄板出现竖向破裂的问题;压边力被精确记载,有助于快速准确地制定薄板材料拉深工艺。
The reason of crack in 304 stainless steel sheet and its improvement measures were studied. The intelligent control system is applied in deep drawing experiments, compared with the traditional drawing process, the drawing parameters are precisely controlled. The experimental results show that for the steel plate with the thickness of 0.28 mm, the blank with the diameter of Φ45.1 mm has the best blank holder force of 80 kN and the diameter of Φ44.5 mm at the same conditions of the stamping speed and lubrication conditions The best blank holder force is 60 kN, which is basically consistent with the simulation trend. In a certain range, by increasing the blank holder force, it can improve the wrinkling defects in the forming process of the cylindrical part and solve the vertical rupture of the 304 stainless steel sheet during the deep drawing process. The blank holder force is accurately recorded, Help to quickly and accurately develop sheet metal drawing process.