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High-Quality Skin Pass Mill from China Suppliers & Factory for Improved Coil Strip Flatness and Surface Quality

Main Function of Equipment

The CR strip coil undergoes a flattening process with a small reduction rate, effectively eliminating stress and elongation of the yield point. During stretching and punching, the slip line phenomenon is prevented, ensuring superior quality.

Post-annealing, the CR coil strip is processed through tempering, enhancing both its flatness (coil shape) and surface roughness.

By adjusting the reduction rate during tempering, we can achieve variations in the mechanical properties of the coil strip, enabling a balance between hardness and plasticity that meets diverse functional requirements.

Equipment Components and Features
Our state-of-the-art equipment includes a Hydraulic Coil Car, Shear, Uncoiler, Front and Back S Roller, Clean Brush Roller, Skin Pass (Tempering Mill), Anti-Wrinkle Roller, Recoiler, Auxiliary Recoiler, Unloading Car, Motor, Electric Control, Hydraulic AGC System, and Hydraulic and Lubrication Devices. As a leading factory and suppliers in China, we are committed to delivering high-quality machinery tailored to your needs.

    Technical Parameter Table

    MODEL / TECHNICAL PARAMETER 650 750 850 1000
    Material Normal carbon steel, stainless steel Normal carbon steel, stainless steel Normal carbon steel, stainless steel Normal carbon steel, stainless steel
    Material thickness (mm) 0.16~1.5 0.3~0.8~1.5 0.3~0.8~1.5 0.3~1.5
    Material width (mm) 550 650 750 900
    Elongation rate (%) 0.2~3.0 0.2~3.0 0.2~3.0 0.2~3.0
    Line speed (m/min) 180~300 180~300 180~400 240~600
    Tempering mill type 2 roll or 4 roll 2 roll or 4 roll 4 roll 4 roll
    Tempering force (KN) 1450 1700 2000 2500
    Driving method Working roll driving Working roll driving Working roll driving Working roll driving
    Hydraulic station pressure (MPa) 10 10 10 10
    Main motor Z4 series(omit) Z4 series(omit) Z4 series(omit) Z4 series(omit)
    Uncoiler motor Z4 series(omit) Z4 series(omit) Z4 series(omit) Z4 series(omit)
    Recoiler motor Z4 series(omit) Z4 series(omit) Z4 series(omit) Z4 series(omit)
    S roll motor Z4 series(omit) Z4 series(omit) Z4 series(omit) Z4 series(omit)

    Remark: The models and parameters shown in this table are for reference only. Design and production can be tailor-made according to user requirements.

    Frequently Asked Questions (FAQ)

    What raw materials can be processed by these tempering mills?
    The mill units are engineered to process both normal carbon steel and various grades of stainless steel with thickness ranges from 0.16 mm to 1.5 mm.
    What is the achievable line speed range across different models?
    Depending on the model chosen, the production line speed operates between 180 m/min and up to 600 m/min for high-capacity applications like the Model 1000.
    How does 2-roll compare to 4-roll tempering mill configurations?
    Models 650 and 750 offer flexible configurations of either 2-roll or 4-roll types, whereas higher-load models (850 and 1000) utilize 4-roll systems to handle greater tempering forces (up to 2500 KN) and wider strip widths.
    What elongation rate control accuracy can be achieved?
    All models provide precise elongation rate control between 0.2% and 3.0%, ensuring optimal strip flatness, mechanical properties, and surface finish.
    What drive system and hydraulic pressures are standard?
    The machines utilize a direct working roll drive configuration powered by high-performance Z4 series DC/AC motors, supported by a 10 MPa working hydraulic station pressure.
    Can line specifications be customized for non-standard strip widths?
    Yes, all technical parameters listed are baseline configurations. Complete design, mill layout, and auxiliary systems can be custom-tailored to your specific factory layout and operational specifications.