China Tandem Rolling Mill / Continuous Rolling Mill Suppliers - High Precision Steel Strip Factory Equipment
Product Introduction
The continuous rolling mill achieves continuous plastic deformation of metal materials by connecting multiple rolling mills in series. Its core principle is based on the equal second flow model, meaning the volume flow of metal between each stand remains constant. Uniformity of the strip thickness (with an accuracy of ±5μm) is ensured through speed matching and tension control. The equipment consists of reducers, motors, universal joint shafts, roller systems, etc., and supports four-high, six-high or twelve-high stand configurations, suitable for the production of high-precision sheet and strip materials.
Cold Continuous Rolling Mill
Using hot-rolled coils as raw materials, after pickling, they are rolled through multiple stands, with thickness accuracy reaching ±1μm. It is used for high surface quality products such as home appliance panels and car bodies.
Process Flow
Hot Coil Pickling
→
Multi-Stand Rolling
→
Annealing
→
Tempering
Supports headless rolling technology to enhance continuity.
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 | 2.0~3.0 |
| Material Width (mm) | 400~520 | 500~650 | 600~750 |
| Finish Thickness (mm) | 0.6~0.40 | 0.6~0.40 | 0.6~0.40 |
| Pressing Force (KN) | 5000 | 6000 | 7000 |
| Support Roll Specification (mm) | Φ520×550 | Φ600×700 | Φ700×820 |
| Working Roll Specification (mm) | Φ175×600 | Φ200×750 | Φ240×850 |
| Mill Units | 5 sets units | 5 sets units | 5 sets units |
| 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) | Φ610×600 | Φ610×750 | Φ610×850 |
| Recoiler (Specifications) | Φ508×600 | Φ508×750 | Φ508×850 |
| Rolling Speed (m/min) | 360 | 420 | 480 |
| Uncoiler Loop | Disc loop or ground loop | Disc loop or ground loop | Disc loop or ground loop |
| Recoiler Tension (KN) | 25 | 30 | 35 |
| 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.
Frequently Asked Questions (FAQ)
Q
What is the working principle of a continuous rolling mill?
The continuous rolling mill works by connecting multiple rolling stands in series and applying the equal second flow model, which ensures the volume flow of metal remains constant between each stand. Speed matching and tension control are used to maintain uniform strip thickness with an accuracy of ±5μm throughout the rolling process.
Q
What materials can the continuous rolling mill process?
The continuous rolling mill is designed to process carbon steel and low alloy steel. It is commonly used in the production of high-precision sheet and strip materials, including home appliance panels and automotive body components that require high surface quality.
Q
What stand configurations are available for this rolling mill?
The continuous rolling mill supports multiple stand configurations, including four-high, six-high, and twelve-high arrangements. Each configuration can be selected based on the specific production requirements, material type, and desired thickness accuracy.
Q
What is the typical process flow for cold continuous rolling?
The standard process flow for cold continuous rolling begins with hot coil pickling, followed by multi-stand rolling, annealing, and finally tempering. The system also supports headless rolling technology, which significantly enhances production continuity and reduces material waste between coils.
Q
What control systems are used in these rolling mills?
The rolling mills use a Siemens 6RA70 DC speed regulator for precise speed control and Siemens PLC for overall electric control. The pressing method employs Hydraulic AGC (Automatic Gauge Control) to ensure highly accurate and consistent thickness throughout the rolling process.
Q
Can the rolling mill parameters be customized to meet specific production requirements?
Yes, all mill models and technical parameters are available for customization. The design and manufacturing process can be tailor-made to accommodate the user's specific requirements, including custom material widths, rolling speeds, pressing forces, and roller specifications beyond what is listed in the standard parameter table.