China Suppliers Factory for Tandem Rolling Mill / Continuous Rolling Mill for High Precision Steel Strips
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.
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Process Flow
Hot Coil Pickling
→
Multi-stand Rolling
→
Annealing
→
Tempering
ⓘ Supports headless rolling technology to enhance production 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 |
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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 connects multiple rolling stands in series and operates based on the equal second flow model. This ensures that the volume flow of metal passing through each stand remains constant, achieving uniform strip thickness with accuracy as tight as ±5μm through synchronized speed matching and precision tension control.
Q
What materials can the continuous rolling mill process?
The continuous rolling mill is primarily designed to process carbon steel and low alloy steel. It uses hot-rolled coils as raw materials, which are first subjected to pickling before being fed through the multi-stand rolling process to achieve the required finished thickness and surface quality.
Q
What stand configurations are available for the continuous rolling mill?
The equipment supports multiple stand configurations, including four-high, six-high, and twelve-high arrangements. These configurations make the mill adaptable for producing a wide range of high-precision sheet and strip materials, catering to different production requirements and material specifications.
Q
What thickness accuracy can the cold continuous rolling mill achieve?
The cold continuous rolling mill can achieve a finished thickness accuracy of ±1μm, making it suitable for high surface quality applications such as home appliance panels and automotive body panels. The standard finished thickness range across all three mill models (650, 750, 850) is 0.6~0.40mm.
Q
What control system is used for the rolling speed and pressing?
The mill uses a Siemens 6RA70 DC speed regulator for precise rolling speed control and Siemens PLC for the overall electric control system. The pressing method employs Hydraulic AGC (Automatic Gauge Control), ensuring accurate and consistent thickness control throughout the rolling process.
Q
Can the technical parameters be customized according to specific production requirements?
Yes, all models and parameters listed in the technical parameter table are provided for reference purposes only. The design and production of the continuous rolling mill can be fully tailor-made to meet individual user requirements, including material dimensions, rolling speed, pressing force, and stand configurations.