4 Hi Cold Rolling Mill Coupled with 5 Tandem Cold Mill
Brand name: HANI
Packing Details : Wooden box with fumigation or Wooden Fram or Steel Frame
Delivery Details: 30~60days or Based on the quantity
Shipping: Sea freight、Land freight、Air freight
HANI focuses on cold rolling mill equipment technology, safeguarding your production.
Product Details
In the modern steel manufacturing industry, precision and efficiency are critical for producing high-quality flat products. The 4 hi Cold Rolling Mill combined with the 5 Tandem Cold Mill system plays a pivotal role in achieving exceptional surface finish, dimensional accuracy, and mechanical properties for various steel applications. At HANI, we specialize in designing and manufacturing cutting-edge cold rolling mills tailored to meet the demanding requirements of steel producers worldwide.
Introduction to 4 hi Cold Rolling Mill and 5 Tandem Cold Mill
The 4 hi cold rolling mill is a fundamental rolling mill type featuring four rolls arranged in two pairs: two work rolls and two backup rolls. This arrangement ensures enhanced roll rigidity and minimal deflection, making it ideal for rolling a wide range of metals into thin sheets and strips with precise thickness control.
Complementing this is the 5 tandem mill configuration, consisting of five cold rolling stands arranged in series. Each stand progressively reduces the strip thickness while improving surface quality and mechanical properties. The tandem mill allows continuous processing with high throughput and consistent product quality.
Key Features and Advantages of HANI’s 4 Hi Cold Rolling Mill Coupled with 5 Tandem Cold Mill
| Feature | Description | Benefit |
|---|---|---|
| 4 Roll Configuration | Two work rolls backed up by two larger rolls to prevent deflection | Increased roll life, precise gauge control |
| High Torsional Stiffness | Strong backup rolls and advanced mill frame design | Reduced roll bending and improved thickness accuracy |
| Automated Gauge Control System | Integration with modern sensors and PLC-based control | Real-time thickness monitoring and adjustment |
| 5 Stand Tandem Arrangement | Five successive rolling stands designed for gradual reduction | High reduction ratio, uniform thickness profile |
| Flexible Material Handling | Designed for various steel grades including carbon, stainless, and specialty alloys | Versatile mill suitable for changing production demands |
| Energy-Efficient Drives | Use of servo or AC motor drives for each mill stand | Reduced energy consumption and operational costs |
| Surface Quality Enhancement | Integration of edging, tension leveling, and surface inspection devices | Superior surface finish, defect minimization |
| User-Friendly Interface | Advanced human-machine interface (HMI) for operation and diagnostics | Ease of operation and maintenance |
Detailed Description
4 Hi Cold Rolling Mill: Backbone of Precision Rolling
The 4 hi cold rolling mill is widely regarded for its superior rolling performance compared to 2 hi mills. The key advantage lies in the support backup rolls that minimize the bending of work rolls, enabling ultra-precise gauge control. This configuration is especially effective for thin gauge products where strict thickness tolerance and minimal profile deviation are mandatory.
At HANI, our 4 hi mill models incorporate robust frame construction and state-of-the-art mill bearings to ensure durability and stability during high-speed rolling operations. Additionally, our mills feature hydraulic roll force systems to achieve the desired reduction while ensuring consistent strip elongation and minimal internal stresses.
5 Tandem Cold Mill: Continuous Rolling Process for Enhanced Productivity
The 5 tandem cold mill is designed for continuous cold rolling processes involving incremental thickness reduction over multiple stands. Each stand progressively reduces the strip thickness by a pre-calculated amount, allowing for a large total reduction without compromising surface integrity.
By coupling the 4 hi cold rolling mill with the 5 tandem cold mill setup, HANI delivers an integrated solution that maximizes productivity without sacrificing product quality. The tandem mill benefits include better dimensional accuracy, improved mechanical properties due to work hardening, and enhanced surface aesthetics through controlled rolling parameters.
Technical Specifications (Typical)
| Parameter | Value/Range |
|---|---|
| Number of Rolls (4 hi Mill) | 4 (2 work rolls + 2 backup rolls) |
| Roll Diameter (Work Rolls) | 280 – 360 mm |
| Backup Roll Diameter | 450 – 600 mm |
| Rolling Force | Up to 1500 kN |
| Maximum Rolling Speed | 200 – 400 m/min |
| Gauge Range (Before Rolling) | 1.5 – 3.0 mm |
| Final Gauge Range (After Tandem) | 0.2 – 1.2 mm |
| Strip Width | 800 – 1600 mm |
| Number of Stands (Tandem Mill) | 5 |
| Motor Power | 500 – 1200 kW (per stand) |
Applications
- Automotive body panels
- Electrical steel production
- Household appliance panels
- Precision packaging materials
- Stainless steel sheets
- Specialty alloy foils
Why Choose HANI’s 4 Hi Cold Rolling Mill and 5 Tandem Cold Mill?
HANI’s commitment to innovation and quality sets our mills apart. Our customized design approach ensures each mill matches client-specific production needs, incorporating automation and predictive maintenance modules that minimize downtime.
With an emphasis on energy efficiency, extended roll life, and ease of maintenance, our cold rolling mill solutions reduce operational costs and boost profitability. Our global service and technical support teams provide comprehensive training and after-sales service to guarantee long-term mill performance.
FAQ
Q1: What is the main advantage of a 4 hi cold rolling mill over a traditional 2 hi mill?
A: The 4 hi configuration offers superior roll support with backup rolls, significantly reducing work roll deflection. This results in better thickness accuracy, longer roll life, and improved surface quality.
Q2: How does the 5 tandem cold mill improve productivity?
A: The tandem mill processes the metal strip through five consecutive stands, each progressively reducing thickness. This continuous rolling process prevents issues like strip breakage and achieves high throughput with consistent quality.
Q3: Can the 4 hi cold rolling mill handle different steel grades?
A: Yes, HANI designs these mills to roll various materials, including carbon steel, stainless steel, and specialty alloys, ensuring flexibility according to production requirements.
Q4: How is thickness controlled during cold rolling?
A: Thickness is controlled by a combination of hydraulic roll force, automated gauge measurement systems, and levelers integrated within the mill. This ensures precise real-time adjustments.
Q5: What support does HANI provide post-installation?
A: HANI offers comprehensive after-sales support, including technical assistance, spare parts supply, staff training, and predictive maintenance services to maximize mill efficiency and uptime.
Conclusion
Integrating a 4 hi cold rolling mill with a 5 tandem cold mill presents an optimal solution for steel manufacturers aiming to enhance product quality and production efficiency. HANI’s expertise and innovation in mill design ensure that clients receive reliable, high-performance equipment tailored for modern steel processing challenges. Our mills are engineered to provide precise control, superior surface finish, and operational flexibility, making them indispensable in today’s competitive market.
For tailored solutions and further inquiries about HANI’s cold rolling mills, please contact our sales and technical team.
HANI is one of China’s leading professional cold rolling mill manufacturers, providing complete cold rolling systems to steel companies worldwide. HANI focuses on designing and manufacturing integrated cold rolling solutions that meet the industry’s highest standards of precision, efficiency, and durability. Our engineering expertise lies in providing turnkey cold rolling production lines to optimize the performance of modern steel manufacturing plants.
