基于侧磨量的普速铁路钢轨铝热焊接头打磨方案设计

Design of Grinding Scheme for Thermit Welding Joints of Ordinary Speed Railway Rail Based on Side Wear

基于调研数据及相关标准和规范,通过焊接试验、理论计算等方法,对普速铁路不同侧磨量铝热焊接头提出一种包括打磨长度及打磨深度的理论计算公式,量化焊后打磨指标。设计一种侧磨钢轨铝热焊接头工作边打磨方案,规范现场打磨作业流程。目的是提高接头与两侧母材一定区间内的平顺性,提升接头和钢轨的服役效果,降低接头出现伤损的概率。当侧磨差异量较大时,建议进行钢轨预打磨,减少现场作业时间。

Based on research data and relevant standards and specifications,a theoretical calculation formula for the grinding length and depth of ordinary speed railway thermit welding joints with different side wear was proposed through welding experiments,theoretical calculations,and other methods to quantify the grinding indicators after welding.A grinding scheme for the working side of side wear rail thermit welding joints was designed to standardize the grinding operation process.For the convenience of on-site operations,a simplified application scheme was proposed.The purpose is to improve the smoothness of the joints and rails within a certain range on both sides,improve the service effect of the joints and rails,and reduce the probability of joints damage.It is recommended to pre-grind the rail to reduce on-site operation time while there is a significant difference in side wear.