Channel steel rail flash welding machine

Abstract

The invention relates to a channel steel rail flash welding machine, which belongs to the technical field of traffic facility construction. A front box body component and a back box body component of the machine are constructed by left and right clamp box bodies hinged onto a center shaft respectively; a tumor push knife is arranged at the inner end of the front box body component; a tumor push oil cylinder for driving the tumor push knife is arranged at the outer end of the front box body component; an upsetting oil cylinder for driving the front box body component and the back box body component to move oppositely are arranged on the outer side of the back box body component; the upper ends of the left and right clamp box bodies are hinged together with the two ends of a clamping oil cylinder which extends and contracts horizontally respectively; a hoisting shaft sleeve from the lower part of which positioning surfaces extend is sleeved on a central hinged shaft; the positioning surfaces are provided with parts contacted with the rail head treads and the rail lip treads of channel steel rails respectively; and the projection shapes of left and right jaws are at least partially matched with the shape of the rail waist slots of the channel steel rails respectively. According to the flash welding machine, welding of asymmetrical left and right channel steel rails can be completed without turning round and reversing, so that the labor intensity is lowered greatly, and the operation efficiency is increased remarkably.

Description

technical field [0001] The invention relates to a rail welding device, in particular to a grooved rail flash welding machine, which belongs to the technical field of traffic facility construction. Background technique [0002] The existing mobile flash welding machine is suitable for the welding of traditional I-shaped rails. Its typical structure is as described in the Chinese patent documents with application numbers 98105796.9 and 98106266.0 and 201110431236.7, including welding transformers, current carrying components and Electric contact device, one end of the fuselage is equipped with the top oil cylinder, and the other end is equipped with the clamping device; the clamping device includes the left and right clamp boxes whose middle parts are hinged to each other through a fixed central hinge shaft, and the left and right clamp boxes. The lower part has relatively raised left and right jaws respectively, and the upper ends of the left and right clamp boxes are respect...

AI Technical Summary

Problems solved by technology

A series of problems encountered when using the above-mentioned existing equipment for welding are: 1) The welding equipment must be turned around to weld the other side of the track, and the turning around is time-consuming, laborious and very troublesome

2) The pusher knife for removing weld burrs needs to have a protrusion that extends downward into the grooved steel rail, so it is easy to interfere and get stuck and cannot be opened

3) Since the perimeter of the section of the grooved steel rail is significantly longer than that of the traditional symmetrical section of the I-shaped rail, the resistance to removing weld bumps is significantly increased, and the pressure of the original oil cylinder needs to be increased when the space size is limited.

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