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High Precision Copper Strip Rolling Mill Manufacturer
CRM Copper Strip Rolling Mill is designed for precision cold rolling of copper strips, copper alloy strips, and non-ferrous metal strips. The production line converts copper rod, rectangular bar, or thick strip into high-quality precision strip with excellent thickness tolerance, flatness, and surface finish.
Our cold rolling mills are widely used for manufacturing transformer copper strip, electrical copper strip, battery connector strip, CTC conductor, motor winding strip, electronic connector materials, and precision copper components.
With advanced AGC thickness control, automatic tension regulation, servo screw-down technology, and intelligent PLC automation, CRM rolling mills provide stable production, high rolling efficiency, and consistent strip quality for continuous industrial manufacturing.
Technical Advantages of CRM Copper Strip Rolling Mill
The CRM copper strip rolling mill is engineered for high-precision continuous production.
- Automatic Gauge Control AGC
- Automatic Flatness Control AFC
- Servo hydraulic roll gap adjustment
- Multi-pass precision cold rolling
- High rolling force stability
- Online strip tension control
- Intelligent PLC control system
- Automatic strip centering
- High-speed continuous rolling
- Low vibration mill structure
- Fast roll changing system
- Energy-saving drive system
- Suitable for continuous 24-hour production
Technical Specifications
| Item | Specification |
| Rolling Material | Copper, Copper Alloy, Brass, Bronze, Precious Metals |
| Input Thickness | 0.5 to 15 mm |
| Finished Thickness | 0.03 to 5 mm |
| Input Width | 10 to 500 mm |
| Finished Width | 10 to 500 mm |
| Maximum Rolling Speed | 600 m/min |
| Rolling Force | 100 to 3000 kN |
| Work Roll Diameter | 50 to 300 mm |
| Backup Roll Diameter | 200 to 800 mm |
| Thickness Tolerance | ±0.002 to ±0.005 mm |
| Width Tolerance | ±0.01 mm |
| Strip Flatness | ≤2 I Unit |
| Surface Roughness | Ra 0.05 to 0.20 μm |
| Coil Weight | Up to 10 tons |
| Main Motor Power | 45 to 800 kW |
| Drive Type | AC Servo or Variable Frequency Drive |
| Lubrication | Automatic Oil Lubrication |
| Cooling System | Emulsion Cooling |
| Control System | Siemens PLC with HMI |
| Production Mode | Continuous Cold Rolling |
Available Rolling Mill Models
CRM provides different rolling mill configurations according to strip thickness and production capacity.
| Model | Typical Application | Work Roll Diameter | Finished Thickness |
| CRM CF | Ultra-thin Copper Foil | 30 to 75 mm | 0.03 to 0.30 mm |
| CRM CA | Precision Copper Strip | 50 to 150 mm | 0.05 to 2.00 mm |
| CRM CN | Heavy Copper Strip | 250 to 500 mm | 0.20 to 5.00 mm |
Materials Processed
The copper strip rolling mill is suitable for various conductive and non-ferrous materials.
| Material | Typical Grades |
| Pure Copper | C11000 C10200 C12000 |
| Oxygen Free Copper | C10100 C10200 |
| Brass | C26000 C26800 C28000 |
| Phosphor Bronze | C51000 C51900 C52100 |
| Beryllium Copper | C17200 |
| CuNi Alloy | C70600 C71500 |
| Silver Bearing Copper | Ag Cu |
| Precious Metals | Silver Gold Platinum Alloys |
Finished Products
CRM rolling mills are widely used for manufacturing precision copper strip products.
| Finished Product | Typical Thickness |
| Transformer Copper Strip | 0.30 to 3 mm |
| CTC Conductor Strip | 0.80 to 3 mm |
| Motor Copper Strip | 0.50 to 2 mm |
| Battery Connector Strip | 0.10 to 1 mm |
| Busbar Strip | 1 to 5 mm |
| Electronic Connector Strip | 0.05 to 0.50 mm |
| Copper Foil | 0.03 to 0.20 mm |
| Precision Copper Strip | 0.05 to 2 mm |
Complete Production Line Configuration
A complete copper strip rolling line normally includes the following equipment.
| Equipment | Function |
| Pre-drawing Machine | drawing wire from big diameter to small |
| Strip Cleaning Machine | Surface cleaning before rolling |
| Straightening Unit | Material leveling |
| Precision Rolling Mill | Thickness reduction |
| Automatic Thickness Gauge | Online measurement |
| Tension Control System | Stable strip tension |
| Intermediate Annealing Furnace | Restore material ductility |
| Air Knife Drying System | Strip surface drying |
| Precision Recoiler | Automatic strip winding |
| PLC Electrical Control System | Centralized production control |
Production Process of Copper Strip Rolling Line
The production process is designed according to the copper grade, input dimensions, required strip thickness, and mechanical properties. Intermediate annealing and rolling schedules are optimized to achieve stable thickness, flatness, and surface quality.
| Process | Equipment | Purpose |
|---|---|---|
| Copper Rod Payoff | Payoff Machine | Provides stable and continuous material feeding. |
| Pre-Drawing | Rod Breakdown Machine or Intermediate Drawing Machine | Reduces rod diameter and improves dimensional consistency before rolling. |
| Surface Preparation | Cleaning and Lubrication System | Removes oxides and contaminants while applying rolling lubricant. |
| Precision Cold Rolling | Copper Strip Rolling Mill | Reduces thickness and forms the required strip width through multiple rolling passes. |
| Intermediate Annealing | Continuous Annealing Furnace | Restores ductility, reduces work hardening, and prepares the material for further rolling. |
| Thickness and Width Measurement | Online Gauge System | Continuously monitors strip dimensions and maintains production accuracy. |
| Surface Cleaning and Drying | Cleaning Machine and Air Wiping System | Removes rolling oil and moisture from the strip surface. |
| Precision Recoiling | Automatic Recoiler | Winds the finished strip under constant tension to produce uniform coils. |
| Final Inspection | Quality Inspection System | Verifies thickness, width, flatness, surface finish, and coil quality before delivery. |
Performance Advantages
| Performance | CRM Copper Strip Rolling Mill |
| Thickness Accuracy | ±0.002 mm |
| Width Accuracy | ±0.01 mm |
| Surface Finish | Ra 0.05 μm |
| Strip Flatness | Excellent |
| Continuous Production | Yes |
| Maximum Speed | 600 m/min |
| Roll Gap Adjustment | Servo Hydraulic |
| Automation Level | Fully Automatic |
| Production Efficiency | High |
| Product Consistency | Excellent |
Typical Industrial Applications
The finished copper strips are widely used in electrical and electronic manufacturing industries.
- Transformer winding strip
- CTC conductor production
- Electric motor winding
- EV hairpin motor conductor
- Battery connector strip
- Electrical switchgear
- Busbar manufacturing
- Electronic terminals
- Precision electrical contacts
- Communication cable components
- Aerospace electrical conductors
Turnkey Copper Strip Production Line
CRM supplies complete copper strip manufacturing solutions including equipment selection, rolling process design, plant layout, automation engineering, installation, commissioning, operator training, and lifetime technical support.
Every production line is customized according to strip width, thickness, annual production capacity, alloy grade, and finished product requirements.
Frequently Asked Questions
What strip thickness and width can a copper strip rolling mill produce?
The production range depends on the rolling mill configuration, work roll diameter, rolling force, and the material grade being processed. Standard CRM copper strip rolling mills can process input materials up to 15 mm thick and produce finished strip from 5 mm down to 0.03 mm through multiple cold rolling and intermediate annealing stages. Strip widths are typically available from 10 mm to 500 mm. For high-precision electrical applications, the finished strip can achieve thickness tolerance as tight as ±0.002 mm and width tolerance within ±0.01 mm after proper calibration and online thickness control.
Which copper and copper alloy materials can be rolled?
CRM rolling mills are designed for a broad range of conductive materials, including electrolytic tough pitch copper, oxygen-free copper, phosphorus-deoxidized copper, brass, phosphor bronze, beryllium copper, CuNi alloys, silver-bearing copper, and other specialty copper alloys. Material hardness, alloy composition, and required mechanical properties determine the rolling schedule, reduction ratio, intermediate annealing process, and roll configuration. Our engineers optimize the complete rolling process for each material to ensure excellent flatness, surface finish, conductivity, and dimensional stability.
How is strip thickness accuracy maintained during continuous rolling?
Thickness consistency is achieved through the combination of high-rigidity mill stands, precision ground work rolls, automatic gauge control, servo hydraulic screw-down systems, and real-time strip tension control. Online laser or X-ray thickness gauges continuously monitor strip thickness during production and automatically compensate for roll gap variations. This closed-loop control system minimizes thickness deviation throughout the entire coil and ensures consistent product quality even during high-speed rolling.
Can the rolling mill be integrated into a complete copper strip production line?
Yes. CRM supplies complete turnkey copper strip production lines rather than only individual rolling mills. Depending on production requirements, the line can include payoff systems, strip cleaning equipment, precision rolling mills, intermediate annealing furnaces, edge trimming units, air wiping systems, strip tension control, automatic recoilers, online inspection equipment, and centralized PLC automation. Every production line is designed according to the customer’s material specifications, finished strip dimensions, annual output, and factory layout.
What production capacity can the copper strip rolling mill achieve?
Production capacity depends on strip width, strip thickness, rolling speed, reduction schedule, and the number of rolling passes. Standard production lines operate at speeds up to 600 m/min, while annual production capacity can range from several thousand tons to more than 50,000 tons for large industrial installations. CRM engineers calculate the optimum production capacity based on the customer’s finished product specifications and recommend the most efficient rolling configuration.
What factors should be considered when selecting a copper strip rolling mill?
Selecting the correct rolling mill requires evaluating several technical parameters, including copper grade, input dimensions, finished strip thickness and width, annual production capacity, required surface roughness, thickness tolerance, mechanical properties, coil weight, and automation level. Additional considerations such as intermediate annealing requirements, online thickness measurement, automatic roll changing, and future production expansion should also be included during project planning. CRM provides complete process analysis and equipment selection to ensure long-term production efficiency and investment value.