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Abstract：
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For the three-roller push bending process of 3003-H24 aluminum alloy, through the analysis of die position change during the machining process, the reason why the theoretical calculation results of forming radius for bent pipe in the previous research were smaller than the measured results was found out, and the bending force was inversely proportional to the forming radius for bent pipe by calculating the bending force and combining with finite element analysis. Then, the bending force had minimal effect on the die position change, and the clearance between parts in the equipment should be mainly considered. Furthermore, through the research of the relationship between the correction values of forming radius for bent pipe and the theoretical machining radius and bending force, as well as the relationship between the bending force and the clearance change between the equipment parts, combined with the graphical analysis, the results show that after the bending force reaches a certain value, the continue increase of the bending force has little effect on the clearance change between parts. In addition, for the pipe bending machine and the pipe bending method used, when the bending force is greater than 100 N, the clearance change tends to be stable, and the correction values of the forming radius for bent pipe mainly depend on the theoretical machining radius. Thus, for the bent pipe processing, as long as the theoretical machining radius is calculated according to the actual required radius of bent pipe, the corresponding correction is made, and the accuracy of processing is improved.
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Funds：
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广东省普通高校科研资助项目（2018GKTSCX044）
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AuthorIntro：
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作者简介：吴磊（1979-），男，硕士，副教授，E-mail：lwu5885@126.com
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Reference：
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