Wheels for high speed trains have so far been imported by Indian Railways. Indigenous manufacturing of LHB wheels had thus became extremely important for the railways.
Durgapur Steel Plant (DSP) on Monday dispatched its first consignment of indegenously developed wheels for LHB (Linke Hofmann Busch) coaches used in high speed trains like, the Rajdhani and Satabdi Express.
The Railways have been gradually converting its traditional coaches made by Integral Coach Factory to LHB coaches, mainly due to its high safety features. However, wheels for these coaches have so far been imported by Indian Railways. Indigenous manufacturing of LHB wheels had thus became extremely important for the railways.
DSP’s Wheel and Axle Plant, which has been making wheels for railway coaches, took up the latest challenge and managed to successfully develop LHB coach wheels as per the Railways’ stringent norms and standards. The consignment consisting of 30 wheels was flagged off by Anirban Dasgupta, CEO of ISP, who holds additional charge as CEO, DSP & ASP, in presence senior officials and Wheel & Axle collective.
The design of LHB wheel is unique due to its web profile. Moreover metallurgical property of LHB wheels are also of very stringent, a DSP statement said. For achieving the complex dimension of LHB wheels, the new design of dies and rolls were done in Wheel Design Center of Wheel & Axle plant. With the use of simulation software, the profiles of Dies and Rolls required for manufacturing of LHB wheel was optimized.
After finalization of Forging Dies & Roll design, they were manufactured in house and production trials were undertaken. The heat treatment process for LHB wheels to achieve the stringent metallurgical property was standardized at Wheel & Axle Plant with the help of RCL, RDCIS and RDSO /IR.