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摘要：
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单纯的弯曲工艺不能解决当前机械制造中的许多问题,为此引入了弯曲机附加拉伸的拉弯工艺。对拉弯变形所产生的残余应力进行了理论分析,得出拉弯的变形力可小于材料的屈服应力,并进行了试验验证,得出在不考虑附加拉伸塑性变形时,板料内外层的应力增加值不大,拉伸后再弯曲其内层应力增加了近2倍,这就解决了普通拉弯工艺的回弹和大弯曲半径存在的主要问题,使弯曲工艺在机械制造领域内得到更加广泛的应用。
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At present,the simple bending process can not solve the problems during the machinery manufacture.A stretch bending process was introduced using stretch bender additional tensile to do the theoretical analysis of the residual stress produced in stretch bending.The obtained stretch bending force might be smaller than the material yield stress.It is proved that the plate inner layer stress added value is not big without considering the plastic distortion of the additional stretch.The inner layer stress is increased almost by 2 times after stretching and bending.The main problems of spring back and large bending radius for ordinary stretch bending were solved to make the bending process to be applied more widely in the field of machinery manufacture.
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作者简介：
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参考文献：
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