| 搅拌摩擦焊接偏心挤压流动模型 |
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| 引用本文： | 邓永芳,左敦稳,宋波.搅拌摩擦焊接偏心挤压流动模型[J].焊接学报,2013(12):41-45. |
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| 作者姓名： | 邓永芳 左敦稳 宋波 |
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| 作者单位： | 南京航空航天大学机电学院, 南京 210016;江苏省精密与微细制造技术重点实验室, 南京 210016,南京航空航天大学机电学院, 南京 210016;江苏省精密与微细制造技术重点实验室, 南京 210016,南京航空航天大学机电学院, 南京 210016;江苏省精密与微细制造技术重点实验室, 南京 210016 |
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| 基金项目： | 国家自然基金资助项目(51175255);江苏省普通高校研究生科研创新计划资助项目(CXZZ13_0152);中央高校基本科研业务费专项资金资助;江苏省高校优势学科建设工程资助 |
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| 摘 要： | 提出了一种偏心挤压流动模型,该模型认为搅拌头对软化材料的偏心挤压作用是形成接头的主要因素.基于该模型,设计并进行了偏心搅拌摩擦焊接试验.结果表明,搅拌摩擦焊接过程中,接头是由搅拌头偏心挤压材料形成的;搅拌头的偏心量越大,形成的接头核心区也将越大;在搅拌针附近的金属流动将使焊接接头形成在行进方向的层状结构;在接头表面将形成弧形纹,形成的弧形纹不是沿板材对接面对称的,而是偏向后退侧的,弧纹在后退侧形成的弧纹夹角比前进侧形成的弧纹夹角大;行进方向的层状结构和接头表面的弧形纹有对应关系.
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| 关 键 词： | 搅拌摩擦焊接 偏心 挤压 流动模型 |
| 收稿时间： | 2013/9/6 0:00:00 |
Eccentric extrusion flow model of friction stir welding |
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| DENG Yongfang,ZUO Dunwen and SONG Bo.Eccentric extrusion flow model of friction stir welding[J].Transactions of The China Welding Institution,2013(12):41-45. |
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| Authors: | DENG Yongfang ZUO Dunwen and SONG Bo |
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| Affiliation: | College of Mechanical & Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;Jiangsu Key Laboratory of Precision and Micro-manufacturing Technology, Nanjing 210016, China,College of Mechanical & Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;Jiangsu Key Laboratory of Precision and Micro-manufacturing Technology, Nanjing 210016, China and College of Mechanical & Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;Jiangsu Key Laboratory of Precision and Micro-manufacturing Technology, Nanjing 210016, China |
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| Abstract: | The eccentric extrusion flow model of friction stir welding was proposed.The model shows that the eccentric extrusion effect of tool for softening material is the most important factor for the formation of joint.The tool with eccentric structure was designed and friction stir welding experiments were carried out,and the influence of the eccentricity of tool on material flow was analyzed.Research shows that the joint forms by the tool eccentrically extruding material in the friction stir welding process.The greater the eccentricity of the tool is,the larger the weld nugget zone of the joint is.Metal flow near the pin will form the relatively obvious layered structure in the advancing direction.The arc lines will form on the surface of the weld,which are not symmetrical,but turn to the retreating side.Angle formed in the retreating side is larger than that formed in the advancing side in the arc lines.There is a corresponding relationship between the layered structure in the advancing direction and arc lines on the surface of the weld. |
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| Keywords: | friction stir welding eccentricity extrusion flow model |
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