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金属板料渐进成形过程中,由于简单夹具和成形零件自身的约束作用,材料在成形工具等高线层上的进给方向基本没有变形,符合平面应变规律,在此基础上提出厚度余弦分布规律,即渐进成形零件的厚度与成形角和坯料初始厚度呈余弦关系.设计并成形了四组实验零件,验证该规律的有效性.实验证明无论是规则的回转体,还是不规则的异形体零件,厚度分布都基本符合余弦规律.根据厚度分布的余弦规律,开发了厚度预报软件.
In the progressive forming process of sheet metal, due to the constraint of simple jigs and forming parts, the feeding direction of the material on the contour line of the forming tool basically does not deform, which accords with the law of plane strain. On this basis, the law of thickness cosine distribution , That is, the thickness of incremental forming parts and the forming angle and the initial thickness of the blank are cosine relations.Design and forming four experimental parts to verify the validity of the law.Experiments show that both the regular rotating body, or irregular shaped parts , The thickness distribution are basically in line with the law of cosine.According to the cosine law of the thickness distribution, thickness prediction software has been developed.