Railway pads (especially iron pads and elastic pads) are important components that connect sleepers and rails in railway fastener systems. Their production technology covers multiple links such as casting, stamping, heat treatment and material ratio, and directly affects the static stiffness, vibration reduction performance and fatigue life of the track system. After structural optimization, the thermoplastic polyester (TPEE) elastic pads produced by GNEE RAIL can reach a static stiffness of about 47.3kN/mm, and the stiffness change rate after 3 million fatigue cycles is less than 20%, thereby improving the load-bearing stability and service life of the entire sleeper and fastener system.
GNEE's production of iron pads is a common process including lost foam casting and sand casting. The former can achieve precision casting of complex shapes. The melting temperature and vacuum degree are strictly controlled during the production process, and the lamellar widmanstatten structure is eliminated through shot peening and normalizing or annealing heat treatment to avoid fracture failure caused by cast brittleness; at the same time, if the annealing temperature is not properly controlled, the fracture rate of the casting will increase, affecting product quality.
Stamping and drawing processes are also used in pad production. For example, the formed steel pad parts are formed by a combination of punching, bending, and drawing processes. It is necessary to consider technical details such as springback and stress distribution to ensure the shape accuracy and processing consistency of the pad; especially in mass production, stamping die design and molding parameter control are extremely critical.
As a professional railway fastener manufacturer, GNEE RAIL has complete production and supply capabilities for iron pads and elastic pads. Whether it is a standard model or a special pad requirement, we support product customization and provide flexible options for pad size, material, structure and surface treatment to meet different project standards such as high-speed rail, heavy-load, and urban rail at home and abroad.
GNEE RAIL not only provides a full range of railway fastener products including iron pads, rail elastic pads, splints, spring bars, gauge blocks, spikes, bolts and nuts etc. If you want to get more information, please contact us: info@gneerail.com