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摘要：
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针对T型三通管内高压成形过程中易出现的破裂和起皱等问题，为提升三通管的成形质量，选择最小壁厚与胀形高度等关键参数作为管件成形质量的评价指标。首先借助内高压成形设备开展T型三通管的实验研究，获取三通管成形的关键参数，并利用非线性软件DYNAFORM对T型三通管内高压成形过程进行仿真分析，通过与实验结果对比，验证有限元模型建立与仿真分析的正确性。基于此采用正交试验法对T型三通管的加载路径进行优化，提出所选工艺参数范围内的最优加载路径，通过实验验证了基于数值仿真与正交试验法获取加载路径的可行性与正确性，并为相关管件的内高压成形研究提供了参考。
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For the problems of cracking and wrinkling occurring in the T-shape tube hydroforming process, in order to improve the forming quality of T-shape tube, the key parameters such as the minimum wall thickness and bulging height were selected as the evaluation indexes of forming quality of tube. First of all, with the help of hydroforming equipment, the experiment of T-shape tube was carried out, and the key parameters of T-shape tube forming were obtained. Then, the hydroforming process of T-shape tube was simulated and analyzed by non-linear software DYNAFORM. By comparing with the experimental results, the correctness of the establishment and simulation analysis for finite element model was verified, and the loading path of T-shape tube was optimized by the orthogonal experiment. Furthermore, the optimal loading path within the selected process parameters was proposed, and the feasibility and correctness of obtaining the loading path based on numerical simulation and orthogonal experiment were verified by experiment, which provided reference for the research of hydroforming of related tube fittings.
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基金项目：
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广西自然科学基金资助项目（2016GXNSFAA380211）；柳州市科学研究与技术开发计划课题(2016C050203)；广西科技大学研究生教育创新计划项目（GKYC201702）
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作者简介：
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作者简介：朱书建(1990-)，男，硕士研究生
E-mail：1627985001@qq.com
通讯作者：李健 （1980-），男，博士，教授
E-mail:lijian0772@126.com
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