Automatic steel rail inclined joint electrical arc welding method and device

Abstract

The invention discloses an automatic steel rail inclined joint electrical arc welding method and device. According to the automatic steel rail inclined joint electrical arc welding method, steel rail weld joints and steel rail axes are inclined at a certain angle for welding. By means of the method, the weld joints only occupy part of each working section and bear all loads together with other parts of steel rail base metal, so that the stress state during working of the weld joints is advantageously improved and the operation safety of welded joints is further improved. The steel rail inclined joint welding method is realized through the automatic steel rail inclined joint electrical arc welding device. The welding device is composed of a rack, traveling wheels, a clamping air cylinder, a welding machine head, a copper block assembly, an actuator, an electrical control system, a pneumatic system, a ground wire pressing head, a welding power source, a ceramic base plate and the like. By means of the automatic steel rail inclined joint electrical arc welding method and device, the operation safety of the welded joints is advantageously further improved, field operation is facilitated, the method and the device adopt to features of inclined joint welding, the device can be used movably on site, and the full automation function is achieved, so that influence of human factors is avoided.

Description

technical field [0001] The present invention relates to a railway rail welding method and its special device. More specifically, the patent relates to an automatic arc welding device for rail oblique seams with narrow gaps. Rail joint welding. Background technique [0002] Rail welding is the key technology to realize the seamlessness of the railway and improve the speed and comfort of the train. At present, there are four methods of international and domestic rail welding: flash welding, gas pressure welding, thermite welding and arc welding. Among them, flash welding is the most important rail welding method at present, and it is the most widely used. However, although the principles and characteristics of these four methods are different, the weld seam form of the welded joint is the same, and the weld seam is perpendicular to the axis of the rail. When the train is running, the entire section of the weld seam is under full load. Once there is any form of weak link in ...

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Problems solved by technology

However, although the principles and characteristics of these four methods are different, the weld seam form of the welded joint is the same, and the weld seam is perpendicular to the axis of the rail. When the train is running, the entire section of the weld seam is under full load. If there is any kind of weak link in the joint quality, it may endanger the driving safety

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