| 鱼海东， 崔国华， 张振山， 郭强， 程禛溢.搅拌摩擦焊双轴肩搅拌针产热模型与温度场研究[J].轻工机械,2019,37(4):35-41 |
| 搅拌摩擦焊双轴肩搅拌针产热模型与温度场研究 |
| Mathematical Thermal Model and Thermal Filed for Bobbin Tool Friction Stir Welding |
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| DOI：10.3969/j.issn.1005 2895.2019.04.007 |
| 中文关键词: 双轴肩搅拌摩擦焊 产热模型 搅拌针 温度场 |
| 英文关键词:bobbin tool friction stir welding mathematical thermal model stir welding pin temperature field |
| 基金项目:国家自然基金（51775165）；上海市科学技术委员会科研计划项目（18030501200）。 |
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| 中文摘要: |
| 为了探究双轴肩搅拌摩擦焊接工艺参数对焊接过程中产热的影响，实现工艺优化，在实际焊接过程中，课题组将焊接工艺中的焊接速度和搅拌针旋转速度引入模型，并综合考虑上、下轴肩和搅拌针在焊接稳定阶段与工件不同的接触模型，分析搅拌针的受力状况，建立了搅拌针受力模型；基于受力模型建立了轴肩和搅拌针的产热模型，对该模型进行数值模拟；通过数值模拟的数据与实测数据对比分析，修改工艺参数中的搅拌针旋转速度，分析工艺参数与产热的关系。结果表明：建立的双轴肩搅拌摩擦焊产热模型可以准确预测实际焊接过程中产生的温度；此外，在一定范围内增加搅拌针旋转速度，焊接产生的温度也随之增加并且在焊缝中心温度呈哑铃状分布。 |
| 英文摘要: |
| In order to completely understand the influence of bobbin tool friction stir welding process parameters on heat generation in welding process and to realize process optimization, the welding speed and rotating speed of pin in welding process were introduced into the established heat generation model for the actual welding process. Both dry and viscous friction contact conditions between tool and workpiece in welding stable stage were considered comprehensively. The force of shoulder and pin were analyzed first, and the force model was established. Based on force model, the mathematical thermal models of shoulder and pin were established respectively. By comparing the numerical simulation data with the experimental data, the rotating speed of the pin in the process parameters was modified, and the relationship between the process parameters and heat production was analyzed. The results show that the mathematical thermal models can accurately predict the actual welding temperature. In addition, with the increase of pin rotation speed in a certain range, the welding temperature will increase and the temperature distribution in the center of the weld is dumbbell shaped. |
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