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随着铁路现代化的发展,机车牵引吨数不断的提高,列车密度的增加,行车速度的加快,牵引动力改革等因素,造成轨道破损,同时也加剧了对辙叉的磨耗。据统计,因铸造缺陷、磨耗超限的伤损,辙叉各段每年维修补充少至几十台,多则几百台,年均焊修辙叉数占正线辙叉铺设总数的30％左右。鉴于目前各段财力的紧张状况,为延长辙叉的使用寿命,保证运输安全,提高经济效益和社会效益,辙叉的修复利用是一项非常重要的工作。因此,提高辙叉焊修的技术水平及推行合理的焊接工艺势在必行。
With the development of railway modernization, the number of locomotive traction continues to increase, the train density increases, speeding up, traction power reform and other factors, resulting in track damage, but also exacerbated the frog on the wear. According to statistics, due to casting defects, excessive wear and tear wear, frog each section to repair as few as few dozen repairs, as many as several hundred units, average annual number of frog frog frontside frog laying the total number of 30% about. In view of the current financial tensions in various sections, frog repair and utilization is a very important task in order to extend the service life of frogs, ensure transport safety and enhance economic and social benefits. Therefore, it is imperative to improve the technical level of frog welding and to promote a reasonable welding process.