Skin-Pass Mill Automation

Automation systems for skin-pass mills by Primetals Technologies are designed to optimize the temper rolling of annealed sheet steel, crucial for achieving desired yield strength, strip flatness, material properties, and surface roughness. The automation solutions address key challenges in steel processing by implementing sophisticated control loops and measurement techniques.

Primetals Technologies offers control modes tailored to optimize the elongation process and enhance product quality. The system employs elongation control modes, including roll force control, which adjusts roll force for desired elongation while maintaining constant tension. Roll force and tension control combines force and tension adjustments for precise elongation, adapting to strip variations. Advanced measurement techniques, such as pulse-counting and laser speed meters, ensure precise control and minimal strip movement. Hydraulic gap control optimizes temper degree through accurate adjustments, while the self-tuning elongation controller adapts to material hardness, strip width, thickness, speed, and tension. The automation system is scalable and integrates with existing mill setups for seamless upgrades.

Benefits of Automation Systems for Skin-Pass Mills

• Enhanced product quality: achieve superior strip flatness and surface quality
• Precision control: ensure precise management of roll force and tension
• Increased efficiency: reduce manual intervention, speeding up production cycles
• Adaptability: automatically adjust to different strip sections for consistent quality
• Scalability: integrate seamlessly with existing systems for upgrades and expansions

Features of Skin-Pass Mill Automation Solutions

• Roll force control: standard mode that adjusts roll force to achieve the desired elongation, with constant tension maintained at entry and exit of the mill
• Roll force and tension control: combine roll force and tension adjustments for precise elongation, automatically adapting to strip section variations
• Pulse-counting: utilize pulse generators on deflector roll drives for precise length measurement
• Laser speed meters: measure entry and exit speeds with high accuracy, ensuring minimal strip movement and precise control
• Hydraulic gap control: ensure precise roll force control for the mill stand, optimizing the temper degree through accurate adjustments
• Self-tuning elongation controller: automatically optimize control based on system gain, adapting to material hardness, strip width, thickness, speed, and tension
• Precision and adaptability: control loops are designed to handle variations in strip sections, ensuring consistent quality across different steel grades.
• Integration with existing systems: the automation system is scalable and can be integrated with existing mill setups, allowing for seamless upgrades and expansions.