OAO BelAZ, a Belarusian dump truck manufacturer, has again chosen Seco/Warwick as its solution provider. The new device, the RLHE electric roller furnace, will be integrated with the technological line for heat treatment of large bearing rings.
The line, based on the RLHE-120.510.20-1000 roller furnace, is designed for heat treatment of large bearing rings with diameter from 980 to 1,180 mm, which are used in the production of the world’s largest trucks, the dump trucks working in the mining industry. The whole supplied technological line consists of: a transport system with a set of manipulators, an electric roller furnace type RLHE-120.510.20-1000, a hardening press with matrix instrumentation, and a control system with a master system for data visualization and archiving.
The cooperation between OAO BelAZ and Seco/Warwick began in 2012 with the delivery of a universal pusher aggregate for thermal improvement (quenching and high tempering) and normalization of APH-800 G forgings. Another implemented solution in November 2016 was a roller aggregate for hardening large-size press bearing rings.
The implementation of such a demanding project could only be delegated to a trusted and proven partner, said Chief Engineer O.G. Stjepuk, first deputy general director for technical policy and innovative technologies OAO BelAZ.
“In producing such powerful trucks, we only reach for precise solutions. We know that because of our stringent requirements, the production line of large-size bearing rings is another extremely difficult project to implement. So again, we trusted the experience of our partner, Seco/Warwick, our long-time collaborator who guarantees meeting the highest requirements that accompany our production.”
The experience of the manufacturer of heat-treatment equipment has allowed OAO BelAZ to achieve expected extremely low deformation rates of hardened bearing rings. Results below 0.2 mm of deformation of flatness and ovalization of heat-treated elements were achieved. Precision is key as the Seco/Warwick electric roller furnace will be used for heat treatment in the production of giant dump trucks carrying multi-ton loads in opencast mines. Among these types of vehicles, the BelAZ 75710 model with a payload of up to 450 tons stands out as the most powerful truck in the world.
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