How is the 500m long high-speed rail welded?

During the track-laying process of high-speed railway, the longest single rail is 500 meters long, which is also the longest rail in the current railway track-laying.  No joint can be seen on this 350-kilometer-per-hour line, just like two complete steel rails going through to the end. railway track material

There is no more disturbing "thud" sound when the train is running on smooth lines, even coins can be stably erected in the high-speed railway carriages "flying on the ground".  These rails will encounter unprecedented challenges in welding, lifting and transportation.  Let's take a look at the "birth" process of these super-long rails. railway track material

At the rail welding base, their main task every day is to weld 100 meters of rail from the steel mill into 500 meters of high-speed rail.

Welding production is divided into appearance inspection, derusting before welding, rail welding, welding rib shaping, fine straightening, quality inspection and flaw detection, etc.  Staff strictly follow the standard and control the quality of each production link. railway track material

Enter the workspace

Careful preparation

Pre-weld inspection

Weld alignment

Precision welding

Carefully check

First grinding

Normalization of rail

Second grinding

Careful examination

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