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钢轨交流闪光焊接过程过梁爆破特征分析

宋宏图

宋宏图. 钢轨交流闪光焊接过程过梁爆破特征分析[J]. 焊接学报, 2018, 39(3): 120-123. DOI: 10.12073/j.hjxb.2018380082
引用本文: 宋宏图. 钢轨交流闪光焊接过程过梁爆破特征分析[J]. 焊接学报, 2018, 39(3): 120-123. DOI: 10.12073/j.hjxb.2018380082
SONG Hongtu. Study of flash beam blasting characteristics in the AC flash butt welding of rail[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(3): 120-123. DOI: 10.12073/j.hjxb.2018380082
Citation: SONG Hongtu. Study of flash beam blasting characteristics in the AC flash butt welding of rail[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(3): 120-123. DOI: 10.12073/j.hjxb.2018380082

钢轨交流闪光焊接过程过梁爆破特征分析

Study of flash beam blasting characteristics in the AC flash butt welding of rail

  • 摘要: 以高速摄影技术作为主要研究手段,研究钢轨交流闪光焊接过程过梁爆破特征,并结合热成像系统采集焊接过程温度场,以此为数据基础定量分析了钢轨交流闪光焊接过梁爆破特征. 结果表明,钢轨交流脉动闪光焊接工艺模式下,加速闪光阶段具有几个阶段中最高的闪光频次46.93次/s,脉动闪光阶段具有最低的闪光频次11.07次/s;连续闪光阶段闪光烈度为0.009 2 mm/次,是几个阶段中最强的,脉动阶段的闪光烈度最弱,为0.003 8 mm/次;从闪光加热因子来看,脉动阶段最高,符合了该阶段积累热量的主要目的;加速闪光阶段最低,是由于该阶段为了制造保护气氛产生的气化过梁带走了较多的热量;从闪光均匀度看,闪光最不均匀的阶段是闪平阶段,最均匀的阶段是脉动阶段,这恰恰说明了两待焊端面的微观平行情况在闪平阶段最差、脉动阶段最佳.
    Abstract: The flash beam blasting characteristics in the AC flash butt welding of rail was analyzed quantitatively by the combination of high-speed photography technology and infrared temperature measurement system. The results proved that for the AC flash butt welding, the accelerate flash stage had the highest flash frequency of 46.93, and the pulse flash stage presented the lowest flash frequency of 11.07. Moreover, the strongest flash intensity of 0.009 2 existed in the continuous flash stage and the pulse flash stage had the weakest flash intensity of 0.003 8. For the flash heating factor, the pulse flash stage with the highest flash frequency accumulated amount of heat. However, owing to the vaporization to take away the heat, the accelerate flash stage had the lowest flash intensity. For the flash uniformity, the most uneven flash and even flash generated in the flash flat stage and pulse flash stage, respectively. It proved that the optimal micro-smoothness of the end faces appeared in the pulse flash stage.
  • [1] 汪殿龙, 张志洋, 梁志敏, 等. 交流CMT动态电弧特征及熔滴过渡行为研究[J]. 焊接学报, 2014, 35(3): 6-10.Wang Dianlong, Zhang Zhiyang, Liang Zhimin,et al. Analysis of dynamic arc characteristics and melt transfer behavior of AC CMT[J]. Transactions of the China Welding Institution, 2014, 35(3): 6-10.[2] Mendez P F, Goett G, Guest S D. High-speed video of metal transfer in submerged arc welding[J]. Welding Journal, 2015, 94: 326-333.[3] Ozakgul, Kadir, Piroglu,et al. An experimental investigation on flash butt welded rails[J]. Engineering Failure Analysis, 2015, 57: 21-30.[4] Lü Qibing, Tan Keli, Dai Xiaogang. Research on application of high-speed data acquisition system for AC rail flash-butt welding[J]. Applied Mechanics and Materials, 2013, 663(1): 884-888.
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  • 收稿日期:  2017-09-15

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