摘要
无缝钢轨焊接接头的平顺性直接影响高速列车运行安全性与舒适性。现有的500 m长钢轨焊接生产过程中,对焊接接头残余焊筋的初次处理主要由人工手持简易机具对接头进行打磨处理,加工质量不稳定且费时费力。为解决人工打磨质量不可控以及消除干扰探伤的焊筋波等问题,研制了一种智能化的钢轨焊缝全断面铣削加工系统和相应的加工工艺流程,针对钢轨轨颚、轨腰、轨底上表面等处的钢轨焊接接头复杂曲面,通过3D非接触精密测量头对焊缝两侧的钢轨进行测量,采用多段小直线拟合方式来实现对钢轨的仿形加工。生产实践表明,该方法使焊接接头铣削后各部位尺寸满足长钢轨焊接工艺要求。
The smoothness of CWR rail welded joints directly influences the operation safety and comfort of high speed railway. During welding process of 500 m rail,rail welding factories treat the residue of welded bar by manual polish with simple devices. The polish quality is unstable and time consuming. To solve the problems of uncontrollable polish quality and to eliminate welded line surface waves interfering rail flaw detection,an intelligent full section milling system and corresponding technical processes were developed. Because of the complex surfaces of rail jaw,rail waist and top of rail bottom at welded joints,this system measures both sides of rail weld line through a 3D non-contact precise measuring sensor,and achieves copying process of rail prof ile by multiple straight lines fitting. Practice indicates that with the help of this system the prof ile dimensions of each part of the welded line meet technical requirements.
出处
《铁道建筑》
北大核心
2017年第10期128-131,共4页
Railway Engineering
关键词
无缝钢轨
钢轨焊缝
智能加工
全断面铣削
精密测量
接头打磨
CWR rail
Rail weld line
Intelligent process
Full section milling
Precise measurement
Joint polish
