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纸质出版日期： 2024-06-25 ，
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孙海涛.白车身金属3D打印钢板与普通低碳钢异质材料点焊可焊性分析［J］.电焊机，2024，54（6）：99-105.
SUN Haitao.Analysis of Spot Weldability on Mixed Combination of 3D-Printing Metal Steel with Low-carbon Steel in Body-in-white[J].Electric Welding Machine, 2024, 54(6): 99-105.
白车身局部采用金属3D打印钢板进行焊接与连接，但装配后白车身总成的可靠性一直缺乏定量的全面评价结果。采用金属3D打印钢材与普通低碳钢钢板进行点焊试验，首先验证了双脉冲参数点焊工艺规范更适用于3D打印钢板与低碳钢钢板之间的连接。在此基础上，进行了焊点接头拉剪强度、微观组织、白车身行李箱盖总成疲劳强度和耐久性测试试验，验证了实际零件点焊质量的可靠性。试验表明，3D打印钢板与低碳钢钢板点焊接头的抗拉强度与普通钢板点焊试样非常接近；3D打印钢板侧快速生成了熔核，低碳钢与熔核之间形成了钎缝；3D打印钢侧的焊点疲劳强度要大于低碳钢侧，在行李箱盖总成耐久性测试后，其功能性完好无损。研究验证了金属3D打印钢零件可作为零件功能性认证，同时也为其将来逐步成为个性化零件装车提供了技术可能性。
Considering the advantages of short deliver time and high precision of 3D-printing metal sheets
these special metal sheets could be used for welding and joining of body-in-white. Nevertheless
the reliability of body-in-white with these 3D-printing metal sheets has lacked quantitative and comprehensive evaluation results. By conducting spot welding experiments of combination of 3D-printing metal steel with normal low-carbon steel
and actual parts (reinforced parts in the inner assembly of rear lid)
dual-pulse parametric spot welding process specification is more suitable for 3D-printing metal steel with normal steel from the point of view on experimental methods. Accordingly the welding process parameters
weld nugget tensile-shear force
microstructure
fatigue tests and durability tests for opening and closing of rear lid
reliability of real spot-welded parts are verified. These results show that the tensile strength of the spot welded joints between 3D-printing metal steel and normal steel is very close to that of the spot welded specimens of ordinary steel sheets; the 3D-printing metal steel side rapidly generates weld nugget while a brazing seam is formed between the normal steel and the nugget; the fatigue strength of the weld joints on the 3D-printing metal steel side is greater than that on the normal steel side
and is functionally intact after the durability testing of rear lid. The substitution of 3D-printing steel parts for traditional steel parts in technical verification is then validated as a conclusion. It also offers the technical possibility to gradually become a customized- personalized parts fitting vehicle in the future.
金属3D打印微观组织拉剪试验疲劳试验耐久性测试
3D-printing steelnugget microstructuretensile-shear force analysisfatigue experimentdurability tests
马小喆. 浅谈软模在汽车新产品工装开发中的应用［J］. 锻压装备与制造技术，2019，54（05）：87-90.
MA X Z. A Brief Discussion on the Application of Soft Mold in the Development of New Automotive Products［J］. Forging Equipment and Manufacturing Technology，2019，54（05）：87-90.
谭磊，赵建光. 金属3D打印技术核电领域研究现状及应用前景分析［J］. 电焊机，2019，49（04）：339-343.
TAN L，ZHAO J G. Research Status and Application Prospects of Metal 3D Printing Technology in Nuclear Power Field［J］. Electric Welding Machine，2019，49（04）：339-343.
杨永强，刘洋，宋长辉. 金属零件3D打印技术现状及研究进展［J］. 机电工程技术，2013，42（04）：1-7.
YANG Y Q，LIU Y，SONG C H. Status and Research Progress of Metal Part 3D Printing Technology［J］. Mechanical & Electrical Engineering Technology，2013，42（04）：1-7.
孙相龙，徐澳门. 金属3D打印在试制车身上的应用分析［J］. 汽车实用技术，2023，48（10）：168-171.
SUN X L，XU A M. Analysis of the Application of Metal 3D Printing in Prototype Car Body［J］. Automotive Practical Technology，2023，48（10）：168-171.
赵亮，刘鹏，郑敬超. 金属3D打印技术工艺探索及应用［J］. 汽车工艺与材料，2023（02）：1-8.
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LAI Z Y，LUO C，ZHANG Y S. The Effect of Printing Direction on the Formation Process of Resistance Spot Welded Joints in 3D Printed Martensitic Ageing Steel［J］. Heat Treatment Process，2022，51（17）：12-18.
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SUN H T，WANG J F，MA Q. Analysis of the effect of electrode pressure on the resistance spot welding quality of three-layer ultra-thick high-strength steel plates［J］. Heat Treatment Process，2017，46（03）：235-237.
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王华锋，王宏雁，陈君毅. 胶接、胶焊与点焊接头剪切拉伸疲劳行为［J］. 同济大学学报，2011，39（03）：421-426.
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