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The railway development trend in the world today is the cargo heavy , high-speed passenger and will require a lot of CWR laying cross . CWR laying and maintenance process , normalizing is an important and indispensable step in the whole process . Low degree of automation equipment for the rail scene after welding flame normalizing , normalizing process manually placed fire operation , as well as manual temperature control normalizing time , human factors , quality of normalizing a great influence , and thus developed a new type of normalizing control technology and equipment , improve the CWR quality in China has an important significance . In this paper, based on analysis of the domestic and international rail pressure welding flame normalizing technology , unstable quality of normalizing , normalizing temperature of rail pressure welding field simulation using finite element analysis software ANSYS ; adopts PLC control core , the design of the control program and control circuit of the control rack and pinion mechanism , the swing detection and comparison , to achieve a normalizing process swing pendulum frequency of the program control ; program control, using the mass flow controller (MFC) to achieve a precise control of oxygen , acetylene gas composition and flow ; successfully developed CWR live rail normalizing set applies to new equipment . The results show that : calculated using ANSYS finite element software simulation rail the normalizing temperature variation , and the error of the measured temperature is 60 ℃ ~ 100 ℃; rack and pinion heater swing wide adjustment range of ( 20mm ~~ 80mm ) heater change frequency ( 1 / s ~ 2 times / s ) , wobble , swing flexible performance control and regulation ; the the CNC the normalizing welding head drop hammer and static bending performance superior to manual normalizing ; CNC normalizing machine process parameters any preset to reduce the human factors , and reduce labor intensity , stable and reliable , easy to operate, can meet the quality requirements of the welding head normalizing CWR site .
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