钢轨气压焊的回火研究  

Study on flashback of rail gas pressure welding

作　　者：喻红梅[1] 戴虹[1] 刘拥军[1] 

机构地区：[1]西南交通大学焊接研究所,四川成都610031

出　　处：《电焊机》2011年第3期79-82,共4页Electric Welding Machine

基　　金：铁道部科技资助项目(2006G019)

摘　　要：气压焊是钢轨现场焊接的主要方法之一。新型的移动式气压焊轨机具有焊接质量稳定、焊接速度快、自动化程度高、无油烟环保的优点,适用于新线和既有线的工地、桥梁、隧道轨道铺设施工工程单元焊、锁定焊复杂工况。回火是气压焊氧、乙炔混合气体燃烧特有的现象,如何避免回火对提高移动式气压焊轨机焊接效率有很大影响。在分析移动式气压焊轨机气路的基础上,根据钢轨焊接工艺所要求的参数,以及气体使用压力安全范围、气流稳定性要求,分别从气瓶连接方式、回火防止器、质量流量控制器等环节进行优化,提出了避免回火的有效方法。Gas pressure welding is one of main methods of rail welding.New types of gas pressure welding engineering vehicle have good quality of welded joints,quick welding and high degree of automation,no fumes and clean,which apply to unit welding,lock welding,bridge,tunnel and other complex conditions of new-built railway and existing line.Flashback is the gas pressure using oxygen and acetylene welding gas mixture burns as a phenomenon peculiar to the heat source.How to avoid flashback has great influence on welding efficiency of the gas pressure welding engineering vehicle.Based on rail welding process parameters requirements,safe use of gas pressure and flow stability requirements,separately from the cylinder connection,flame arrester,mass flow controller to optimize,and then the article propose the way to avoid flashback.

关 键 词：气压焊 回火 质量流量控制器 

分 类 号：TG453.2[金属学及工艺—焊接]