Description
Technical Parameters
Railway Fish Plate
| Category | Specification | Details / Value |
|---|---|---|
| Product Name | Railway Fish Plate (Also known as: Rail Joint Bar, Splice Bar) | |
| Primary Function | To connect two abutting rail ends, transmitting forces across the joint while maintaining alignment and providing a continuous running surface. | |
| Design Principle | A symmetrically designed metal bar that sandwiches the web of two rail ends, held together by high-strength bolts. It is a critical safety component in jointed track. | |
| Key Design Feature | Profile | Contoured to match the rail profile (head, web, foot) precisely. Common types: 4-hole, 6-hole. |
| Contact Surface | The inner surface is often shot-blasted or treated to achieve a specific friction coefficient for slip-resistant connections. | |
| Holes | Precision-drilled holes for fit-for-purpose bolts. May have countersunk or normal holes. | |
| Material | High-Quality Carbon Steel or Alloy Steel (e.g., 50Mn, 60# steel, B7). | |
| Heat Treatment | Normalized or Quenched & Tempered to achieve an optimal balance of strength and toughness. |
Advantages of Railway Fish Plates
| Advantage Category | Specific Advantage | Description |
|---|---|---|
| Functional & Operational | Secure Rail Connection | Provides a reliable mechanical link between two abutting rail ends, ensuring continuity of the track. |
| Load Transmission | Effectively transfers vertical, lateral, and longitudinal forces (from train wheels, braking, and traction) across the joint. | |
| Maintains Alignment | Holds the rails in correct vertical and horizontal alignment, preserving track geometry and gauge. | |
| Installation & Maintenance | Ease of Installation | Relatively simple to install and replace compared to thermite welding or other permanent joining methods, requiring basic tools. |
| Facilitates Track Maintenance | Allows for easy removal and replacement of individual rail sections without disrupting long stretches of track. | |
| Adjustability for Expansion | In jointed track, allows for thermal expansion and contraction of rails, preventing buckling in varying temperatures. |
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