Automatic welding technologies for long-distance pipelines by use of all-position self-shielded flux cored wires
Automatic welding technologies for long-distance pipelines by use of all-position self-shielded flux cored wires
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DOI：
10.1016/j.ngib.2014.10.015
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发表时间：
2014-10
影响因子：
3.3
通讯作者：
Zeng Huilin;Wang Changjiang;Y. Xuemei;W. xinsheng;Liuhu Ran
中科院分区：
文献类型：
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作者：
Zeng Huilin;Wang Changjiang;Y. Xuemei;W. xinsheng;Liuhu Ran
为了实现复杂环境下管道的自动焊接，研制了全位置自保护药芯焊丝自动焊接系统，该系统具有全位置可焊性好、电弧稳定性好、不熔化率低、风速< 8 m/s时无需焊接保护气体和防风等优点。该系统由焊接小车、导轨、自动控制系统、焊接电源、送丝机等组成，并利用该系统对X-80管线钢进行了焊接试验，确定了合理的焊接工艺参数。焊接工艺包括根焊、填焊和盖焊，并通过试验分析得出了相应的焊接工艺参数。在此基础上，对该情况下的焊接接头进行了力学性能试验。结果表明，该系统可提高整个焊接过程的连续性和稳定性，焊接接头的内在质量、外观形状和力学性能均满足X-80管线钢焊接规范要求，且无需设置防风栅栏，可大幅降低焊接成本。同时，对自保护药芯焊丝的进一步研究和开发提出了积极的建议。
In order to realize the automatic welding of pipes in a complex operation environment, an automatic welding system has been developed by use of all-position self-shielded flux cored wires due to their advantages, such as all-position weldability, good detachability, arc's stability, low incomplete fusion, no need for welding protective gas or protection against wind when the wind speed is < 8 m/s. This system consists of a welding carrier, a guide rail, an auto-control system, a welding source, a wire feeder, and so on. Welding experiments with this system were performed on the X-80 pipeline steel to determine proper welding parameters. The welding technique comprises root welding, filling welding and cover welding and their welding parameters were obtained from experimental analysis. On this basis, the mechanical properties tests were carried out on welded joints in this case. Results show that this system can help improve the continuity and stability of the whole welding process and the welded joints' inherent quality, appearance shape, and mechanical performance can all meet the welding criteria for X-80 pipeline steel; with no need for windbreak fences, the overall welding cost will be sharply reduced. Meanwhile, more positive proposals were presented herein for the further research and development of this self-shielded flux core wires.