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一、前言汽车生产中,纵梁是一个独特的零件。因为它的形状与尺寸特殊,因而在冲压中所出现的问题也不同于汽车上的其他零件。冲压生产靠模具使毛坯变形,获得一定形状、尺寸和性能的零件。用不同的冲压方法其毛坯的变形性质也不同,冲压零件的形状与尺寸往往不完全与模具相同,有时相差甚大,影响其冲压精度。汽车纵梁在冲压中产生的形状畸变及尺寸变化表现为横向回弹、纵向翘曲及扭曲三方面。由于这种形状畸变,在车架的装配生
First, the foreword Automobile production, the stringer is a unique part. Because of its special shape and size, the problem with stamping is also different from the rest of the car. Stamping production by the mold deformation of the rough, access to a certain shape, size and performance of the parts. With different stamping methods, the deformation properties of the blank are also different, the shape and size of the stamping parts are often not exactly the same with the mold, sometimes a great difference, affecting the stamping accuracy. Vehicle longitudinal beams in the stamping of the shape distortion and dimensional changes manifested as lateral rebound, longitudinal warp and distortion of three areas. Due to this shape distortion, the assembly of the frame was born