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Abstract：
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For the water pipes with large flow rate profile, it was proposed that biasing the connecting pipe of water pipe in two different directions to reduce the flow rate in order to optimize the cooling system of hot stamping die,deduce the difference of flow rate among various profiles of water pipes and improue the forming quality of forming parts. Then, taking the standard deviation of flow rate of various profiles of water pipes as quality index, the orthogonal test was designed to get the best offset distance. After the optimization, the flow field analysis and die surface temperature analysis of the cooling system were carried out, and under two kinds of bias, the velocity uniformity of each pipe increased by 86.2% and 77.6% respectively, the maximum temperature of die surface decreased by 18.5 ℃ and 11.6 ℃ respectively, and the average temperature of die surface decreases by 13.0 ℃ and 5.3 ℃ respectively. Furthermore, corresponding experimental system was set up for flow rate test, and the experimental results were found to be in good agreement with the simulated results. The research results show that the method can effectively improve the uneven flow rate of the die cooling water pipe and the temperature uniformity of die surface.
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Funds：
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国家自然科学基金资助项目（51405149）；湖南省自然科学基金资助项目（201631390158）
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AuthorIntro：
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作者简介：刘迪辉（1975-），男，博士，副教授
E-mail：dihuiliu@163.com
通讯作者：万雨娴（1993-），女，硕士研究生
E-mail：1404118250@qq.com
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Reference：
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