近年来随着圆角刃口冲边在拉冲模上应用,研制了各种浅盒形件(不带法兰)拉伸、冲边复合模具。可减少工序,提高产品质量,收到了良好的技术经济效果。但是,对于正、反面均需拉伸的零件,用圆角刃口冲边和正、反二次拉伸复合模具,并要求一次完成多道工序和获得高质工件的拉伸工艺的研究还是较少的。为此,对这一工艺方法进行分析探讨是必要的。 In recent years with the fillet edge punch on the pull die on the application developed a variety of shallow box-shaped (without flange) drawing, red edge composite mold. Can reduce the process, improve product quality, received a good technical and economic results. However, for the positive and negative parts are to be stretched, with the rounded edge of the red edge and positive and negative secondary drawing composite mold, and asked to complete a number of processes at once and high-quality parts of the drawing process or more research Less. For this reason, it is necessary to analyze this process method.