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摘要：
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根据13 t整体式挂车支承桥主轴产品的结构特点，提出了无缝钢管挤压缩径成形新工艺。通过精确控制温度场梯度，提高无缝钢管变形区的支撑能力，实现端部缩径系数大幅降低。采用数值模拟结合工艺试验的方法，揭示了主轴成形过程中金属的流动状态以及关键工艺参数对产品成形性和壁厚分布的影响规律。结合主轴的形状尺寸要求和变温成形的工艺性，对工艺参数的取值或选择范围进行了优化。在双向挤压液压机上进行了工艺试验并得到了形状尺寸合格的样件，各工序变形区的壁厚分实测数值与数值模拟基本吻合，验证了数值模拟的正确性和工艺的可行性。与传统工艺相比，新工艺实现了挂车主轴少火次、短工艺流程的精密快捷成形。
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According to the structure characteristics of the main shaft of a type of 13 t integral trailer support bridge, the neck-extruding technology for manufacturing the main shaft with a seamless steel tube was put forward. Then, the support capacity of the deformation zone of seamless steel tube was improved by controlling the temperature gradient precisely, and the coefficient of necking at the end was greatly reduced. Through the numerical simulation and practical experiment, the influences of metal flow status and key process parameters on the formability and wall thickness distribution of the metal during the forming process were obtained, and the value or range of the corresponding process parameters were optimized by combining with the shape-size of the main shaft and the manufacturability of extrusion with variable temperature. Furthermore, the practical experiments were conducted on a bidirectional extrusion hydraulic press, and the samples with qualified shape and size were obtained. In addition, the wall thickness distribution in deformation zone in each process basically agreed with that of the numerical simulation,
which indicates that the numerical simulation was reasonable and the forming process was feasible. Compared with the traditional process, the new technology realized the precision and quick forming of the main shaft with less heating passes and technical processes.
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基金项目：
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国家自然科学基金资助项目（51374108）;河北省教育厅青年基金资助项目（QN2017410）；中央高校基本科研业务经费项目（3142015023）
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作者简介：
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作者简介：李攀（1987-），男，博士，讲师
E-mail：lipanvc@163.com
通讯作者：罗建国（1977-），男，博士，副教授
E-mail:luojg_〖KG-*3〗1598@126.com
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参考文献：
|
［1］ 许卫，洪智敏.我国汽车产业发展与宏观经济因素关联性研究
［J］.中国高新技术企业，2014，29(1)：1-6.
Xu W, Hong Z M. Research on relevance between chinese automobile industry development and macroeconomic factors
［J］. China High-Tech Enterprises, 2014，29(1)：1-6.
［2］ 金伟.公路交通运输业与国民经济的关系探讨
［J］.技术与市场， 2016，23（6）:373-374.
Jin W. Discussion on the relationship between highway transportation industry and national economy
［J］. Technology and Market, 2016，23（6）:373-374.
［3］ 赵进启，赵术冉，廖威，等.大型运输车辆安全件支承桥
［J］. 汽车零部件,2011，(10):74-76.
Zhao J Q, Zhao S R, Liao W, et al. Safety component support bridge of large transport vehicle
［J］.Automobile Parts, 2011, (10):74-76.
［4］ 丁兆磊.挂车车轴疲劳强度分析及优化设计
［D］.淄博：山东理工大学, 2013.
Ding Z L. Fatigue Strength Analysis and Optimum Design of Trailer Axle
［D］. Zibo: Shandong University of Technology, 2013.
［5］ 王吟洪，邱贤洲.支承桥技术发展趋势浅析
［J］.现代零部件, 2005,(11):38-42.〖LL〗
Wang Y H, Qiu X Z. Analysis of development trend of support bridge technology
［J］. Modern Components，2005,〖DK〗(11):38-42.
［6］ 王明建，夏申琳，潘恒沛. 汽车轻量化技术现状及展望
［J］. 汽车工艺师, 2016, (7) :56-59.
Wang M J, Xia S L, Pan H P. Present situation and prospect of automotive lightweight technology
［J］. Auto Manufacturing Engineer，2016, (7) :56-59.
［7］ 郑娟英.我国重型汽车车桥历史、现状及发展趋势
［J］.汽车实用技术，2010，(2)：19-24.
Zheng J Y. The history, present situation and development trend of heavy duty vehicle axle in China
［J］. Automobile Technology, 2010，(2)：19-24.
［8］ 郭永强，徐春国,任伟伟,等.大直径无缝钢管挤压缩口成形工艺研究
［J］.锻压技术,2014,39(12):53-57.
Guo Y Q, Xu C G, Ren W W,et al. Research on necking extrusion forming process for seamless steel tube with large diameter
［J］. Forging & Stamping Technology, 2014, 39(12):53-57.
［9］ Xu C G, Ren G S, Guo Y Q, et al. Tube necking extrusion principle and forming process of trailer rear axle
［J］. Procedia Engineering, 2014, 81:634-640.
［10］ Liu G H, Guo Y Q, Jiang Z. Influence of heating models on necking deformation during tube extrusion process
［J］. Advanced Materials Research, 2011, 189-193:1778-1781.
［11］ 王连东.回转壳体正负成形理论及汽车桥壳胀形工艺的研究
［D］.秦皇岛：燕山大学，2002.
Wang L D. Study on Positive-Negative Forming Theory of Revolving Sheel and Bulging Technology of Automobile Axle Housings
［D］.Qinhuangdao: Yanshan University, 2002.
［12］ 王连东，赵石岩，高鹏飞，等.管坯推压缩径端部翘曲机理及其影响因素分析
［J］.塑性工程学报，2005，12(3)：76-79.〖JP〗
Wang L D, Zhao S Y, Gao P F, et al. Analysis of warping mechanism of end of tube blank and influencing factors in push-necking process
［J］. Journal of Plasticity Engineering, 2005，12(3)：76-79.
［13］ 夏巨谌，金俊松，邓磊,等.常规挤压与缩径挤压的变形规律及工艺设计
［J］.塑性工程学报, 2014,21(5):52-56.
Xia J C, Jin J S, Deng L, et al. Deformation law and process design of conventional extrusion and necking extrusion
［J］. Journal of Plasticity Engineering, 2014,21 (5):52-56.
［14］ 李攀.商用车整体驱动桥壳成形工艺及关键技术研究
［D］.北京：机械科学研究总院，2017.
Li P. Research on Forming Process and Key Technologies for Manufacturing Integral Driving Axle Housing of Commercial Vehicle
［D］. Beijing: China Academy of Machinery Science and Technology, 2017.
［15］ 〖JP3〗刘锡成,李文峰，王会群.基于热挤压成型技术的整体式挂车桥壳产品技术设计与开发
［J］.创新科技,2004, (8):61-62.〖JP〗
Liu X C, Li W F, Wang H Q. Technology design and development of integral trailer axle housing based on hot extrusion technology
［J］. Innovation Science and Technology, 2004, (8):61-62.
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