Metal Strips Rolling Mill

A metal strip rolling mill is a critical piece of industrial equipment, playing a central role in the precious metals and general metalworking industries. It processes metal strips—such as gold, silver, and copper—by passing them between one or more pairs of rotating rollers that apply precisely controlled pressure. This process induces planned plastic deformation, shaping the metal into precise strips, foils, or semi-finished products with specific thicknesses, widths, and surface finishes. This system is key to achieving high-precision, high-efficiency metal forming, directly determining the quality and consistency of the final product.

Core Working Principle: Precision Deformation Under Pressure

The fundamental principle of a strip rolling mill is **plastic deformation**. The drive system rotates the high-strength rolls in opposite directions, and the metal strip is fed into the gap between them. The mill applies immense vertical pressure—far exceeding the metal’s yield strength at room or elevated temperatures—through a hydraulic or mechanical system. This force causes the metal’s atomic lattice to slip, resulting in uniform thinning of its thickness, elongation in length, and a smooth surface finish. The entire process can be managed by an advanced CNC system that provides closed-loop control over pressure, speed, and tension, ensuring precise and stable deformation.

Key Components and Their Functions

A high-performance metal rolling mill is a perfect integration of precision machinery and intelligent control, consisting of the following main components:

• Rolls: The core tools for deformation, directly determining product accuracy and surface quality. They are typically manufactured from ultra-high-strength, wear-resistant alloy materials like Cr12MoV, DC53, or Tungsten Steel, and undergo precision grinding and heat treatment to ensure long-term stability under high pressure and abrasive conditions.

• Frame: Acting as the “skeleton” of the entire machine, the frame is usually constructed from heavy-duty cast steel or welded steel plates, stress-relieved for stability. Its primary function is to provide the rigidity and strength needed to withstand enormous rolling forces, preventing any frame deflection from compromising rolling accuracy.

• Drive System: The “heart” of the mill, providing smooth and powerful rotational force to the rolls. This system typically includes high-performance motors, reduction gearboxes, and couplings, ensuring the rolls maintain constant torque at preset speeds for smooth startup and braking.

• Control System: The “brain” of the operation. Modern mills commonly use an automated control system combining a PLC (Programmable Logic Controller) with an HMI (Human-Machine Interface). Operators can use it to precisely set and monitor key parameters like working speed, rolling pressure, forward/reverse operation, and coiling tension, guaranteeing an automated and repeatable production process.

Industry Applications and Value

In the precious metals sector, the metal strip rolling mill is indispensable. It is used to roll cast gold and silver ingots into standard-thickness investment bars or thin sheets, and further into ultra-thin foils for applications in electronic circuits, decorative materials, and high-end crafts. Its value lies in its ability to produce high-quality products with precise dimensions, bright surfaces, and dense microstructure, all while offering high material utilization and mass-production capabilities, significantly enhancing the added value and brand image of precious metal products.

[The comparance of roller material ]