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Abstract：
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Using numerical simulation DEFORM-3D and genetic algorithm as the means, for the blank making process of cross wedge rolling for connecting rod, taking the widening angle, the forming angle, the height of the first wedge and the initial temperature of blank as the design variables and taking the first principal stress as the optimization goal, the mapping relationship between the design variables and the optimization goal was constructed by the Kriging model, and the Kriging model was optimized globally by the genetic algorithm. Then, the optimum parameter combination of the cross wedge rolling process for connecting rod blank was obtained with the widening angle of 32 °, the forming angle of 8.99 °, the height of the first wedge of 6.21 mm, and the initial temperature of blank of 1200 ℃ which were used in the numerical simulation and the experimental verification. The results show that the optimized process parameters reduce the maximum principal stress in the central area from 77 MPa to 35 MPa and eliminate the crack defects in the central area of blank by the original process.
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Funds：
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重庆市教委科学技术研究项目资助（KJ1603809）; 重庆工商职业学院科研项目（ZD 2016-01）
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AuthorIntro：
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黄超群(1981-),女,硕士,副教授，E-mail：hcq_ctbi@163.com
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Reference：
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