6hi Mill

Key Components of a 6Hi Mill:

Working Rolls: The 6Hi mill features two smaller working rolls that come into direct contact with the metal being rolled. These rolls reduce the thickness of the metal to the desired specifications.
Intermediate Rolls: Positioned between the working rolls and backup rolls, the intermediate rolls play a crucial role in distributing the rolling force more evenly. They help to reduce deflection and ensure a more uniform thickness across the width of the metal strip.
Backup Rolls: The two large backup rolls provide support to the intermediate rolls, preventing them from bending under the high rolling forces. This configuration helps maintain the stability and precision of the working rolls.

A 6Hi mill (Six-High mill) is an advanced type of rolling mill used primarily in the metalworking industry for the cold rolling of metal strips and sheets.

This mill is an evolution of the 4Hi mill and includes additional rolls to improve control over the rolling process, which is critical for producing high-quality, thin-gauge metal products.

6Hi Mill

Advantages of a 6Hi Mill:

Enhanced Precision: The addition of intermediate rolls allows for better control over the shape and thickness of the metal strip, reducing the risk of defects like edge waviness or uneven thickness.
Versatility: 6Hi mills can handle a variety of materials, including stainless steel, aluminum, and high-strength alloys. They are especially useful for producing thin-gauge materials with tight tolerances.
Improved Flatness and Surface Quality: The mill's design minimizes deflection, which is particularly important for producing flat metal strips with excellent surface quality.

Applications:

Cold Rolling: Like 4Hi mills, 6Hi mills are primarily used for cold rolling processes. They are capable of rolling metal to very thin gauges, making them essential for producing materials used in applications that require high precision and excellent surface quality.
High-Strength Materials: The 6Hi mill's ability to manage rolling forces effectively makes it suitable for rolling high-strength materials that are difficult to process with simpler mills.

Operation

In a 6Hi mill, the metal strip is passed between the working rolls, which reduce its thickness. The intermediate rolls distribute the rolling force more evenly, while the backup rolls provide necessary support. The combination of these rolls ensures that the metal is rolled to the desired thickness with minimal defects and excellent surface quality.