High Precision Reversing Cold Rolling Mill for Carbon and Stainless Steel - China Suppliers & Factory
The Theory of Four Roll Rolling Mill
Four roll rolling mill system is composed of two pcs of support rolls and two pcs working rolls. During mill, through pressing cylinder or mechanical pressing device, the pressing force will transmit to support roll bearing stand, support roll, working roll, and finally act on rolled piece.
The work piece height will be reduced (become thinner), length extended (become longer), then to meet the expected specifications.
Product Introduction
The four-high reversing cold rolling mill is an important metal pressure processing equipment, widely used in metallurgy, mechanical manufacturing, non-ferrous metal processing and other industries. It performs cold rolling on metal materials through the coordinated action of four rolls, achieving material thinning, surface quality improvement and mechanical property enhancement.
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 the stability and accuracy of the rolling process. The reversible design enables the rolling mill to roll in both forward and reverse directions without frequent adjustments to the position of the rolled piece or the rolling mill, significantly improving production efficiency.
In terms of industry standards, the design, manufacture, and acceptance of four-high reversing cold rolling mills follow strict standards and regulations. These standards cover multiple aspects such as the structure, performance, safety, and environmental protection of the rolling mill, ensuring its stable and reliable operation and the safety of operators. Parameters such as rolling force, rolling speed, and roll diameter are clearly specified to ensure stability of the rolling process and consistency of rolling quality.
Technical Parameter Table
| Mill Model / Technical Parameter | 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) | 5000 | 6000 | 7500 |
| Support Roll Specification (mm) | Φ550×600 | ¢650×700 | ¢700×820 |
| Middle Roll Specification (mm) | ———— | ———— | Φ300/Φ280×820 |
| Working Roll Specification (mm) | Φ185/Φ165×650 | ¢205/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) | ¢610×650 | ¢610×750 | ¢610×850 |
| Recoiler (Specifications) | ¢508×650 | ¢508×750 | ¢508×850 |
| 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. The design and production can be tailor-made according to user's requirements.







