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一、前言 在板材的冲压加工中,承受U形弯曲加工的制品很多。但这类U形制品的回弹变形大,往往不能满足精度的要求。随着材料的高强化,回弹变形已越来越受到人们的重视。作为提高精度的方法,常用的方法有:①在弯曲部位加强压;②调整背压;③在模具上制出一定的形状;④用凸轮模型从横向推压直边,使之过弯等等各种各样的方法。笔者设计了一种使精度进一步提高的方法,
First, the foreword In the sheet metal stamping process, to withstand U-shaped bending a lot of products. However, these U-shaped products, large deformation, often can not meet the accuracy requirements. With the material of high strength, rebound deformation has been more and more people’s attention. As a method to improve accuracy, commonly used methods are: ① in the bending pressure to strengthen; ② adjust the back pressure; ③ in the mold to produce a certain shape; ④ cam model with a straight edge from the lateral to make it bend and so on A variety of ways. I designed a method to further improve the accuracy,