In recent years, with the transformation of China's railway line and increasing demands of transport capacity, domestic railway locomotives has entered a quick update period. The locomotive purchase reached 100 billion yuan in 2010, and 126 billion yuan in the next year. The market requirements of railway locomotives maintain upward momentum during the whole “Twelfth Five-year Plan” period.
In order to meet the needs of leaping development in locomotive industry, domestic passenger train and urban rail vehicle manufacturing are under overall technical equipment modification and product technology upgrade. Welding is one of the key technologies.
Different from traditional welding technology, laser welding can gather full energy in a small area because of the perfect propagation and focus features. Therefore, laser welding has highly-centralized energy, fast speed, high precision, good quality, small deformation, easy operation and many other advantages. As one of the potential welding methods in the 21st century, laser welding has been successfully used in locomotive manufacturing in recent years.
In 2014 Penta Laser and El.En Group research 6000W locomotive dedicated laser welding machine together. It is installed in CRRC Qingdao Sifang Co.,Ltd which is largest locomotive manufacturing enterprise in China. 60% high-speed locomitives are manufactured by this company.
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