High Precision HI Reversing Cold Rolling Mill for Carbon and Stainless Steel - China Suppliers Factory
The Theory of Four Roll Rolling Mill
Due to the impact of pressing force, rollers will become bending, the workpiece edges will become thinner. Rollers need grinding their convexity according to practical situation to maintain rolling accuracy and product consistency.
Product Introduction
From a technical perspective, the four-high reversing cold rolling mill consists of work rolls and backup rolls. The work rolls directly contact the rolled piece to perform rolling deformation, while the backup rolls support the work rolls to reduce their deflection and ensure stability and accuracy. The reversible design enables the rolling mill to roll in both forward and reverse directions without frequent adjustments, significantly improving production efficiency.
In the automotive manufacturing industry, rolled plates are used for body panels requiring high strength, good formability, and corrosion resistance. In the electronic and electrical industry, rolled strips are used to manufacture precision components requiring high surface finish and dimensional accuracy.
The design, manufacture, and acceptance of four-high reversing cold rolling mills follow strict industry standards covering structure, performance, safety, and environmental protection — ensuring stable operation and operator safety. Parameters such as rolling force, rolling speed, and roll diameter are clearly specified to ensure process stability and consistent rolling quality.
Operation and maintenance are equally critical. Operators require professional training in the mill's structure, performance, and procedures. Regular maintenance — including roll replacement, lubrication system inspection, and electrical system servicing — is key to ensuring long-term reliable operation.
Technical Parameter Table
| Technical Parameter / Mill Model | 650 | 750 | 850 |
|---|---|---|---|
| Material | Carbon steel and low alloy steel | Carbon steel and low alloy steel | Carbon steel and low alloy steel |
| Material Thickness (mm) | 2.0 ~ 3.0 | 2.0 ~ 3.0 | 2.0 ~ 3.5 |
| Material Width (mm) | 400 ~ 550 | 500 ~ 650 | 600 ~ 750 |
| Finish Thickness (mm) | 0.5 ~ 0.15 | 0.5 ~ 0.16 | 0.5 ~ 0.18 |
| Pressing Force (KN) | 5,000 | 6,000 | 7,500 |
| Support Roll Specification (mm) | Φ550×600 | Φ650×700 | Φ700×820 |
| Middle Roll Specification (mm) | ———— | ———— | Φ300/Φ280×820 |
| Working Roll Specification (mm) | Φ185/Φ165×650 | Φ205/Φ190×750 | Φ225/Φ205×850 |
| Driving Method | Working roll driving | Working roll driving | Working roll driving |
| Main Motor | DC Motor | DC Motor | DC Motor |
| Speed Reducer | Joint gear box | Joint gear box | Joint gear box |
| Uncoiler Specifications (mm) | Φ610×650 | Φ610×750 | Φ610×850 |
| Recoiler Specifications (mm) | Φ508×650 | Φ508×750 | Φ508×850 |
| Rolling Speed (m/min) | 360 | 450 | 540 |
| Uncoiler Tension (KN) | 30 | 35 | 45 |
| Recoiler Tension (KN) | 10 ~ 70 | 10 ~ 80 | 10 ~ 90 |
| Pressing Method | Hydraulic AGC | Hydraulic AGC | Hydraulic AGC |
| DC Speed Regulator | Siemens 6RA70 | Siemens 6RA70 | Siemens 6RA70 |
| Electric Control | Siemens PLC | Siemens PLC | Siemens PLC |
⚠️ Remark: The model and parameters shown in this table are for reference only. Design and production can be tailor-made according to user's requirements.







