20 hi cold rolling

1. Industry Transformation Through Advanced Rolling Technology

In the high-precision strip processing sector, conventional used cold rolling mill equipment struggles to meet escalating demands for micron-level tolerances and material efficiency. Our 1200mm Wide Cold Rolling Mill redefines production paradigms with its 20-High Reversible Cold Rolling Mill architecture – delivering unparalleled thickness control down to 0.15mm across challenging materials like silicon steel and stainless foil. Engineered to outperform legacy used cold rolling mill installations by 400% in precision metrics, its revolutionary roll stack configuration achieves longitudinal tolerances ≤3% while enabling 40-ton coil processing at speeds up to 600 m/min.

2. Core Mechanical Engineering Excellence

Figure 1: 20-High Roll Stack Configuration [Insert cross-section diagram showing cascaded roll clusters]

2.1 Multi-Cluster Roll System

• Work Rolls: Ø63×1200 mm (CVD-coated tungsten carbide)

• 1st Intermediate Rolls: Ø102×1200 mm (Ceramic-reinforced forged steel)

• 2nd Intermediate Rolls: Ø173×1200 mm (Double-normalized 86CrMoV7)

• Backup Bearings: Ø300×1200 mm (Hydrostatic oil-film design)

• Force Distribution: 5,000 kN rolling force dissipated through 5-layer cluster matrix

• Deflection Control: ≤0.001 mm/m across 1050mm width

2.2 Precision Drive System

• Main Motor: 1×1500 kW AC synchronous drive

• Regenerative Braking: Recaptures 85% deceleration energy

• Dynamic Response:

• Max Acceleration: 0.4 m/s²

• Emergency Stop: 1.5 m/s² (SIL-3 certified)

• Stopping Accuracy: ≤500 mm position control

3. Material-Specific Processing Capabilities

Table: Input/Output Thickness Performance

3.1 Critical Tolerance Management

• Longitudinal Consistency: ≤3% deviation over 10-km coils

• Transverse Profile: ≤2% edge-to-center variation

• Surface Integrity: Ra ≤0.12 µm on stainless mirror finishes

4. Reversible Operation Architecture

4.1 Bidirectional Processing Advantages

• Productivity: 40% cycle time reduction vs. tandem mills

• Tension Control:

• Max: 400 kN (±3% static / ±5% dynamic)

• Speed Synchronization: ±0.1% accuracy at 600 m/min

• Coil Handling:

• Mandrel Expansion: Ø595–610 mm (reeler) / Ø548–634 mm (uncoiler)

• Hydraulic Response: 0.1-second grip engagement

4.2 Operational Efficiency Metrics

5. Industry-Specific Optimization

5.1 Electronics Manufacturing

• Silicon steel processing: 0.18 mm thickness for transformer cores

• Width capability: 1050 mm for EV battery collector plates

• Flatness control: ≤2 I-units across grain-oriented materials

5.2 Automotive Applications

• Low-carbon steel processing: 550 m/min for seat frame strips

• Tension stability: ±3 kN during acceleration/deceleration

• Surface finish: Ra 0.15 µm for Class-A exterior components

6. Advanced Control & Monitoring

• Thickness Control: X-ray gauge with 0.1 µm resolution

• Roll Force Management: AI-driven predictive adjustment

• Vibration Analysis: Online FFT monitoring of roll bearings

• Remote Diagnostics: 24/7 cloud-based performance tracking

7. Sustainability & Maintenance

7.1 Environmental Leadership

• Heat recovery: 85 kW thermal capture from emulsion coolant

• Fluid management: Closed-loop filtration (5 µm absolute)

• Noise emission: ≤75 dB(A) at operator stations

7.2 Predictive Maintenance

• Bearing wear prediction: 500-hour advanced warning

• Mandrel system diagnostics: Optical deformation sensing

• Roll surface monitoring: Eddy-current flaw detection

8. Retrofit Solutions for Legacy Mills

This 20-High Reversible Cold Rolling Mill offers modernization pathways for used cold rolling mill installations:

• Hybrid Control Retrofit: Upgrade packages for 1980s+ mills

• Mechanical Enhancement: Roll cluster conversion kits

• Automation Integration: Bolt-on tension control modules

• Energy Recovery: Retrofittable regenerative braking

9. Technical Specifications Summary

10. ROI & Operational Advantages

• Productivity: 55 tons/hour throughput at 600 m/min

• Material Savings: $420,000/year (20,000 ton production)

• Quality Premium: 30% higher pricing for tolerance-critical applications

• Uptime Guarantee: 95% operational availability (contract-backed)

11. Conclusion: Next-Generation Thin-Strip Production

This 1200mm Wide Cold Rolling Mill represents the pinnacle of 20-High Reversible Cold Rolling Mill technology – delivering unmatched precision for high-value applications from automotive to energy infrastructure. By combining revolutionary roll stack mechanics with intelligent control systems, it achieves thickness tolerances previously unattainable on conventional used cold rolling mill equipment. The mill's reversible operation architecture and 1050mm processing width create unprecedented economies of scale, while its retrofit-ready subsystems offer strategic modernization pathways for existing production assets.