The forging stage of rail flash welding has a decisive influence on joint strength,and the study of the temperature distribution in the process has an important role in further improving joint strength.In this paper,t...The forging stage of rail flash welding has a decisive influence on joint strength,and the study of the temperature distribution in the process has an important role in further improving joint strength.In this paper,three calculation methods for the temperature field are given.First,the finite element model of the temperature field before forging rail flash welding is established by using the transient heat module of Ansys software and verified by infrared temperature measurement.Second,the temperature distribution of different parts of the rail before flash welding is obtained by using infrared thermal imaging equipment.Third,Matlab software is used to calculate the temperature of the non-measured part.Finally,the temperature distribution function along the rail axis is fitted through the temperature measurement data.The temperature distribution before the top forging of the rail flash welding can be used to analyze the joint and heat-affected zone organization and properties effectively and to guide the parameter setting and industrial production.展开更多
钢轨焊机自动对中系统的调整与保养对有效控制钢轨焊接接头错边量至关重要。以G A A S 8 0/5 8 0钢轨闪光焊机为例,基于其自动对中系统基本原理,提出了自动对中技术要点,从基本调整、设备感应开关调整和设备焊后调整三方面,逐步达成了...钢轨焊机自动对中系统的调整与保养对有效控制钢轨焊接接头错边量至关重要。以G A A S 8 0/5 8 0钢轨闪光焊机为例,基于其自动对中系统基本原理,提出了自动对中技术要点,从基本调整、设备感应开关调整和设备焊后调整三方面,逐步达成了将焊接接头调整至最佳状态的目标;并结合以上调整步骤,制定了设备保养制度。研究成果为今后钢轨外形精整各工序提供了可靠质量基础,为行车质量提供保障。展开更多
基金supported by the China National Railway Group Corporation Science and Technology Research and Development Program(J2022G009)Dr.Jingjing Li received no grant support.
文摘The forging stage of rail flash welding has a decisive influence on joint strength,and the study of the temperature distribution in the process has an important role in further improving joint strength.In this paper,three calculation methods for the temperature field are given.First,the finite element model of the temperature field before forging rail flash welding is established by using the transient heat module of Ansys software and verified by infrared temperature measurement.Second,the temperature distribution of different parts of the rail before flash welding is obtained by using infrared thermal imaging equipment.Third,Matlab software is used to calculate the temperature of the non-measured part.Finally,the temperature distribution function along the rail axis is fitted through the temperature measurement data.The temperature distribution before the top forging of the rail flash welding can be used to analyze the joint and heat-affected zone organization and properties effectively and to guide the parameter setting and industrial production.
文摘钢轨焊机自动对中系统的调整与保养对有效控制钢轨焊接接头错边量至关重要。以G A A S 8 0/5 8 0钢轨闪光焊机为例,基于其自动对中系统基本原理,提出了自动对中技术要点,从基本调整、设备感应开关调整和设备焊后调整三方面,逐步达成了将焊接接头调整至最佳状态的目标;并结合以上调整步骤,制定了设备保养制度。研究成果为今后钢轨外形精整各工序提供了可靠质量基础,为行车质量提供保障。
