How Does a 700mm Four-High Cold Rolling Mill Improve the Surface Quality of Carbon Steel and Non-Ferrous Metals?

Surface quality is one of the most important indicators for evaluating the value of cold-rolled sheets, especially in industries such as automotive, appliances, electronics, and aerospace, where high standards of smoothness and uniformity are required. The Φ185/Φ560×700 Four-High Two-Stand Tandem Cold Rolling Mill, with its 700 mm strip width and four-high configuration, excels in improving the surface quality of both carbon steel and non-ferrous metals.

The four-high design, with work rolls supported by backup rolls, minimizes elastic deformation of the roll gap during the rolling process. This ensures uniform rolling pressure, resulting in superior flatness and thickness consistency. It also reduces surface scratches and indentations, greatly improving sheet smoothness. This makes the mill particularly suitable for cold-rolled grades such as SPCC and SPCD, which demand high surface quality.

Moreover, the equipment can process non-ferrous metals such as aluminum, copper, nickel, and their alloys. These materials typically exhibit high ductility, which often leads to surface waviness and thickness deviations in conventional mills. With its precise hydraulic AGC system and intelligent automation, the 700 mm four-high mill can adjust parameters in real time, preventing such defects.

In terms of productivity, the mill supports high-speed continuous operation, equipped with a storage accumulator and hydraulic shearing system to ensure uninterrupted production. The final output materials not only achieve uniform thickness but also exhibit excellent surface smoothness. Whether used for automotive exterior panels, appliance casings, or precision electronic components, the mill consistently meets stringent appearance and performance standards.