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4 Hi Cold Rolling Mill

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Heavily reinforced Stand Housings machined to closest tolerances (Window Size within 0.04 mm)
Rolls made of forged alloy steel having high hardness (62+ HRC)
Rolls running on Spherical Roller Bearings fitted in C-45 grade steel cast housings with labyrinth sealing arrangement
Screw Down with Bronze Nut & Buttress threaded Alloy Steel Screw
Extra heavy duty Gear Box cum Pinion Stand with hardened output shafts
Universal type Coupling Spindles with Slipper Pads for drive from Gear Box to Rolls
Roll removal trolley system for easy replacement of Rolls

Precision Engineering for Steel Strip Cold Rolling

This 4 Hi Cold Rolling Mill delivers exceptional thickness reduction and superior surface finish for steel strips. Its heavy-duty fabricated steel housing and advanced control systems ensure unmatched stability throughout the rolling process. High-performance forged alloy steel rolls and a modern lubrication system prolong component longevity, while the automatic and computerized features guarantee consistent, repeatable results with minimal manual intervention.

Advanced Automation and Operator Safety

Equipped with a fully PLC-controlled system and HMI touch screen, this rolling mill streamlines operations and enhances operator control. The centralized lubrication and spray nozzle coolant system minimize wear and help maintain ideal operating temperatures. Multiple inbuilt safety features, including emergency stop capabilities and overload protection, safeguard both personnel and equipment to ensure a secure working environment.

FAQ's of 4 Hi Cold Rolling Mill:

Q: How does the 4 Hi Cold Rolling Mill achieve precise thickness reduction?

A: The mill uses a combination of high-strength forged alloy work rolls (320-400 mm diameter) and backup rolls (900-1000 mm diameter), integrated with a fully automated PLC control system. This setup allows precise adjustment of roll gaps and tension, enabling accurate thickness reductions from 15 mm down to 0.15 mm.

Q: What materials can be processed using this rolling mill?

A: This rolling mill is primarily designed for mild steel but can accommodate a wide range of steel strips due to its robust construction, variable drive options, and adjustable strip width up to 1500 mm.

Q: When is a centralized automatic lubrication system beneficial in a rolling mill?

A: The centralized automatic lubrication system delivers consistent lubrication to critical moving parts throughout the operation, significantly reducing friction, minimizing wear, and extending equipment lifespan, especially during high-speed, continuous production runs.

Q: Where is the 4 Hi Cold Rolling Mill primarily used?

A: It is widely employed in steel manufacturing plants and processing facilities where high-quality cold rolled steel strips are required, particularly in applications demanding large-volume production and strict tolerances.

Q: What is the process for installing and commissioning this mill?

A: Installation requires a dedicated foundation, after which the manufacturer provides expert support for commissioning. The process includes equipment alignment, connection of utilities (power, coolant, lubrication), system calibration, and operational training for staff.

Q: How does the mill's cooling system function?

A: The spray nozzle coolant system efficiently controls roll and strip temperatures during operation, improving product quality, reducing thermal deformation, and preventing surface defects on the processed steel strips.

Q: What are the main benefits of using this 4 Hi Cold Rolling Mill?

A: Key advantages include precise thickness control, high production speed (up to 1200 m/min), enhanced safety features, energy-efficient operations, and reliable output capacity (up to 100,000 tons/year), making it ideal for modern steel strip manufacturing.