| The alternate wire-feed control in the automatic CO2 arc welding |
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| 作者姓名： | 卢亚静 胡绳荪 易小林 单平 |
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| 作者单位： | SchoolofMaterialsScience＆Engineering,TianjinUniversity,Tianjin,300072 |
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| 摘 要： | In the automatic CO2 arc welding, the alteration of the vertical distance between the welding torch and the workpiece has a strong effect on the welding parameters such as welding current and voltage, with the result that the appearance and quality of weld are not steady. To weaken the influence of the distance alteration, a method is put forward in the paper. The method is that the alternate wire-feed control is used for compensating the welding current. On the basis of theoretical analysis, a static numerical model for alternate wire-feed control is established. The experiments show that the model-based regulation of the wire feed rate can compensate the welding current and ensure the appearance of weld. When the alteration of vertical distance between the torch and the workpiece is greater, not only is the wire feed rate regulated, but the output voltage of the power source is adjusted to ensure the appearance and quality of weld.
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| 关 键 词： | 二氧化碳电弧焊 金属丝延伸 进料效率 力学平衡 |
The alternate wire-feed control in the automatic CO2 arc welding |
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| Abstract: | In the automatic CO_2 arc welding, the alteration of the vertical distance between the welding torch and the workpiece has a strong effect on the welding parameters such as welding current and voltage, with the result that the appearance and quality of weld are not steady. To weaken the influence of the distance alteration, a method is put forward in the paper. The method is that the alternate wire-feed control is used for compensating the welding current. On the basis of theoretical analysis, a static numerical model for alternate wire-feed control is established. The experiments show that the model-based regulation of the wire feed rate can compensate the welding current and ensure the appearance of weld. When the alteration of vertical distance between the torch and the workpiece is greater, not only is the wire feed rate regulated, but the output voltage of the power source is adjusted to ensure the appearance and quality of weld. |
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| Keywords: | CO_2 arc welding wire extension wire feed rate |
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