Jinan Lingxiu Laser Equipment Co.,Ltd.
From the development of car materials from ordinary alloy steel materials to stainless steel, aluminum alloy profiles, the changes in materials have led to the improvement of processing technology, laser cutting machines, and advanced laser welding technologies have also been introduced into the production line of railway vehicles.
The production process of the car body is as follows: the purchased aluminum alloy raw materials are cut according to the size by laser, water cutting and other processes, and then processed and welded into different parts. These parts are combined and finally assembled and welded into a car body.
There are about 20%-30% of the special-shaped parts of the steel structure parts of the locomotive, especially the parts of the locomotive cab, car body auxiliary equipment, etc., which are more suitable for laser cutting. Laser cutting realizes flexible processing, and the cutting process is easy to realize control automation, which can greatly shorten the production cycle and reduce manufacturing costs, and improve product quality. Therefore, laser cutting has replaced traditional processing methods and has become the main method for blanking sheet metal in the manufacturing of rail vehicles at home and abroad.
From iron wagons to high-speed trains, the "face value" of trains is getting higher and higher, and the process requirements for welding are getting higher and higher. Due to the traditional resistance welding process, there are certain convex marks inserted in the surface solder joints, and the car body sealing of the spot welding structure is poor, and the car body products of high-speed EMUs cannot be widely used.
Laser welding can be continuous welding and sealing welding, the transformation is concentrated, the welding deformation is small, the flatness of the car body is less than 1 mm, and the goal of no welding deformation and discoloration on the surface is realized, and the stainless steel car body with beautiful appearance and unpainted is manufactured. Through the laser welding process, the static strength and fatigue strength of the vehicle are improved, the quality of the vehicle body is reduced, the sealing is good, the internal quality of the product and the commercial quality is improved, and the composition of the high-speed motor vehicle with the stainless steel body is possible.
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