Date: 2025/6/20
Category: Metallurgical encyclopedia terms
Views: 514
The layout of the 2+3 rail production line is illustrated in Figure 1. The rolling line's core equipment comprises two two-high reversible roughing mills and a three-stand compact reversible universal rolling mill (UR-E-UF). This innovative configuration, developed by Germany's SMS company, implements Compact Reversible Universal Rolling (CCS) technology to minimize universal mill stands to the essential number, while significantly optimizing spatial arrangement efficiency and production process coordination.
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The continuous casting bloom is rolled into rail-shaped blanks through two roughing mills, then conveyed to the universal rolling mill train for three-pass reversible rolling. This process undergoes 4 universal rolling passes and 2 edging passes to form the final rail (see Figure 2). The universal mill unit employs a computer closed-loop control system with hydraulic AGC for dynamic roll gap adjustment. Tension control system (TCS) technology ensures uniform deformation during continuous rolling, significantly enhancing dimensional accuracy and surface quality. The edger features an innovative mobile positioning design with dual grooves integrated into a single stand, functionally equivalent to two separate edgers. This compact configuration dramatically shortens the rolling line length, minimizes temperature drop, and maintains optimal finishing temperature within the process window, creating favorable conditions for subsequent heat treatment.
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