Synopsis of Slitting Line Drives and Controls Project

Situation: A stainless steel processing company in China contracted a globally recognized OEM (Original Equipment Manufacturer) for the supply of a complete slitting line. The line was made to process stainless steel. Line specifications included line speed variation at 0 to 150 mpm (meters per minute) and maximum shear strength at 600+MPa (Megapascals), which is equivalent to the water pressure used in water jet cutters used for cutting metal and concrete. Strip dimensions: Maximum width at entry – 1400 mm (approx. 55”); minimum width at entry – 200 mm (approx. 7”); maximum width at exit – 1350 mm (approx. 53”); minimum width at exit – 25 mm (approx. 1”); maximum thickness – 3mm (approx. 0.11”); minimum thickness – 0.25mm (0.009”). Issue: Optimizing operations of the new slitting line with drives and controls automation. Technology: Siemens Regenerative Rectifier Unit, Siemens Simovert Masterdrive VC drives, Profibus DP Network, Siemens ET 200M distributed I/O, Industrial Ethernet, Siemens S7 PLC, Siemens WinCC.

Requirement: A new drive control system designed and developed to optimize Slitting Line production and provide operators with a user-friendly monitor and control technology platform. Brock Solutions' Role: Design, develop, and implement the electrical system and related drives and controls. Overall scope included producing the electrical schematics; engineering the drive line-up; fabricating electrical control panels; programming PLCs and designing and programming HMIs; supplying AC motors, ultra-sonic loop sensors, and a line speed reference encoder; simulation testing; commissioning, start up, and user training.

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