On-line welding and mending method for service damage of channel rail

Abstract

The invention discloses an on-line welding and mending method for service damage of a channel rail. The on-line welding and mending method comprises the following steps that first, the damage part ofthe channel rail is treated before welding, and when the damage part of the channel rail is abraded, welding can be conducted after fresh metallic luster is directly polished; second, the to-be-weldedpart of the channel rail is preheated, the preheating temperature is set in advance according to the carbon equivalent of steel rail base metal and surfacing materials and the heat resistance of highpolymer materials wrapping the steel rail, and welding is conducted immediately after preheating is ended; third, in the welding stage, automatic surfacing is conducted along the to-be-mended surfaceof the channel rail through surfacing repairing equipment, and surfacing is conducted in the single direction layer by layer; and fourth, in the post-welding polishing stage, post-welding polishing is conducted on the channel rail after welding repair through post-welding polishing equipment, an outline shape is restored, and flaw detection is conducted. It is guaranteed that no weld flaws such as cracks, slag inclusion, and undercuts occur to the welding area.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to an online repair method for service damage of a grooved rail. Background technique [0002] As a product of the last century, trams have now become the main focus of urban transportation construction due to the advantages of moderate traffic volume, low investment, and simple line laying through modern technology upgrades. In order to achieve the functions of good guidance and low noise generated by modern trams when they are running in the city, their line tracks generally adopt embedded tracks. Place the grooved rail in the rail support groove. After the gauge is adjusted, the rail is tightly covered by the polymer material, only the rail head part is exposed, and the surrounding subgrade is flush with the top surface of the rail. [0003] The characteristics of dense departure density of tram lines, long operating time, short distance between stations leading to ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the above problems and provide a grooved rail that can replace the removal of damaged sections, re-lay new tracks and repair tracks, and can overcome the problems of manual welding and repairing methods such as unclear technical specifications and human factors interfering with the repair quality. On-line welding repair method for service damage

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