In the cold rolling of stainless steel tubes, rolls (forming rolls, work rolls, and guide rolls) are the core tooling that shapes, sizes, and strengthens the tube through plastic deformation at room temperature.
Their main functions include:
Reduce wall thickness and outer diameterRolls apply high pressure to squeeze the stainless steel tube wall, precisely controlling the wall thickness and outer diameter to meet tight dimensional tolerances.
Improve dimensional accuracy and roundnessThe roll profile and pass design force the tube into a precise round shape, ensuring uniform wall thickness and high concentricity — critical for stainless steel tubing used in precision industries.
Enhance surface finishPolished rolls produce a smooth, bright, defect-free surface on stainless steel tubes, which is essential for applications like food processing, pharmaceuticals, and decoration.
Refine grain structure and improve mechanical propertiesCold rolling deformation work-hardens the stainless steel, increasing its strength, hardness, and density while improving straightness.
Control tube shape and stabilityRolls guide and support the tube during rolling to prevent bending, twisting, or wrinkling, maintaining straightness and consistent cross-section.
Form special tube profilesFor shaped tubes (square, rectangular, oval, etc.), specially profiled rolls gradually form the required cross-section step by step.
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