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摘要：
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对于3003-H24铝合金的三滚轮推弯工艺，通过对加工过程中模具位置变化的分析，得出前期研究的弯管成形半径理论计算结果比实测结果偏小的原因，进一步通过对弯管力的计算，并结合有限元分析，得出弯管力与弯管成形半径成反比，弯管力对模具位置变化的影响极小，主要应考虑设备的零件间隙；通过对弯管成形半径的修正量与理论加工半径、弯管力的关系，以及弯管力与设备零件之间的间隙变化量的关系进行研究，结合图形分析的方式，结果表明，弯管力达到一定值后，继续增大对零件之间的间隙变化量影响不大，对于所使用的弯管机及弯管方式，弯管力大于100 N后，间隙变化量趋于稳定，弯管成形半径的修正量主要取决于理论加工半径。对于弯管加工，只要根据实际所需弯管成形半径，计算出理论加工半径，并对其进行相应修正，即可提高加工的准确性。
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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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基金项目：
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广东省普通高校科研资助项目（2018GKTSCX044）
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作者简介：
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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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参考文献：
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