Application Research of Flux Cored Vertical Welding System and Process on Locomotive Body Skin

JIAO Jinming; YUE Juan; LV Chunjie; GAO Ying

doi:10.7512/j.issn.1001-2303.2022.12.16

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Application Research of Flux Cored Vertical Welding System and Process on Locomotive Body Skin
Vol. 52, Issue 12, Pages: 122-127(2022)
DOI： 10.7512/j.issn.1001-2303.2022.12.16

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焦金明，岳娟，吕纯洁，等.机车车体蒙皮药芯立焊系统及工艺研究［J］.电焊机，2022，52（12）：122-127.

JIAO Jinming, YUE Juan, LV Chunjie, et al.Application Research of Flux Cored Vertical Welding System andProcess on Locomotive Body Skin[J].Electric Welding Machine, 2022, 52(12): 122-127.
焦金明，岳娟，吕纯洁，等.机车车体蒙皮药芯立焊系统及工艺研究［J］.电焊机，2022，52（12）：122-127. DOI： 10.7512/j.issn.1001-2303.2022.12.16.

JIAO Jinming, YUE Juan, LV Chunjie, et al.Application Research of Flux Cored Vertical Welding System andProcess on Locomotive Body Skin[J].Electric Welding Machine, 2022, 52(12): 122-127. DOI： 10.7512/j.issn.1001-2303.2022.12.16.

摘要

机车车体钢结构蒙皮涨拉板组焊是机车车体制造的关键工序，组焊质量直接影响车体的外观成形和总装质量。目前涨拉板立焊焊缝工艺一般选用实心焊丝手工焊方式，焊接生产效率低，焊缝质量也不稳定。为提高焊缝质量，开发了药芯立焊系统，同时研制了脱氢性能良好的TME711V药芯焊丝。该焊丝采用Mn-Si-Ni-Ti合金系，在铝、镁、钛等强脱氧固氮元素的共同作用下可提升焊缝韧性。在HXD2型货运电力机车车体上进行了手工实心焊丝与自动药芯焊丝对比试验，结果表明，药芯焊丝可以将焊接电流提高至180 A（手工焊130 A），焊接速度提高至30 cm/min（手工焊18 cm/min），同时焊缝成形美观，焊缝抗拉强度提升10%以上，冲击韧性提升20%以上。

Abstract

The assembly and welding of the tension plates for the steel structure skin of the locomotive body is a key process in the manufacture of the locomotive body, and the assembly and welding quality directly affects the appearance forming and final assembly quality of the locomotive body. At present, the vertical welding process of tension plate is generally manual welding with solid welding wire, with low welding production efficiency and unstable weld quality. In order to improve the weld quality, the flux-cored vertical welding system is developed, and the TME711V flux-cored wire with good dehydrogenation performance is developed. The welding wire adopts Mn-Si-Ni-Ti alloy system, which can improve the weld toughness under the joint action of strong deoxidization and nitrogen fixation elements such as aluminum, magnesium and titanium. The contrast test between manual solid welding wire and automatic flux cored wire is carried out on the body of HXD2 freight electric locomotive. The results show that the flux-cored wire can increase the welding current to 180 A (manual welding 130 A), the welding speed to 30 cm/min (manual welding 18 cm/min), and the weld shape is beautiful. The tensile strength of the weld increases by more than 10%, and the impact toughness increases by more than 20%.

关键词

机车车体立焊TME711V药芯焊丝高效化焊接

Keywords

locomotive bodyvertical weldingTME711Vflux cored wirehigh efficiency welding

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