1450mm 6-hi CRM
Technical Introduction
This professionally revitalized 1450mm single stand mill represents the pinnacle of industrial cold rolling technology. Designed as a 6 hi reversing cold rolling mill, this used reversing cold rolling mill delivers exceptional performance for high-volume production of precision steel strips. Capable of processing 28-ton coils at speeds up to 900 m/min, its comprehensive refurbishment ensures OEM-equivalent performance at 40-60% capital cost savings while maintaining ±0.01mm thickness tolerances.
Core Specifications
| Parameter | Value |
|---|---|
| Processing Width | 800-1300 mm |
| Thickness Range | Input: 1.5-4.0 mm → Output: 0.2-2.0 mm |
| Material Compatibility | Q195-Q235, 08A1, 20#, SPCC, SPCD |
| Max Coil Weight | 28 tons |
| Coil Dimensions | ID: Ø610 mm / OD: Ø1100-2100 mm |
| Rolling Speed | 900 m/min (max) |
| Rolling Force | 20,000 kN |
| Tension Capacity | Uncoiling: 7-70 kN · Coiling: 7-140 kN |
Roll Stack Configuration
| Roll Type | Size (mm) | Function |
|---|---|---|
| Work Rolls | Ø425/Ø385 × 1450 | Direct material contact |
| Intermediate Rolls | Ø490/Ø440 × 1480 | Stress distribution |
| Backup Rolls | Ø1300/Ø1150 × 1450 | Structural support |
Advanced Control Systems
Precision Engineering:
Work roll bending: ±360/180 kN (single side)
Intermediate roll bending: 500 kN (single side)
Intermediate roll shift: 325 mm horizontal adjustment
Hydraulic AGC with 28 MPa system pressure
Automation Features:
PLC-controlled threading at 60 m/min
Digital tension closed-loop control
Real-time thickness monitoring
Refurbishment Certification
Restored to exceed original performance:
Roll Stack: Reground to OEM tolerances (±0.001mm)
Bearings: SKF/FAG premium series replacement
Hydraulics: Complete seal/gasket renewal
Drives: DC motor recommissioning
Validation: 100-hour test run with SPCC steel
Technical Advantages
1. Unmatched Precision
Maintains ±0.01mm tolerance across 1300mm width
6-Hi configuration eliminates edge drop (<1%)
Surface roughness: Ra ≤0.5μm
2. Productivity Features
| Capability | Benefit |
|---|---|
| Reversible Operation | 40% faster processing vs. single-direction mills |
| 900 m/min Rolling | 28-ton coil processing in <18 minutes |
| Quick Changeovers | <30 minutes for thickness transitions |
3. Material Versatility
Processes to international standards:
GB 708-88 (cold-rolled steel)
GB/T 5213-2001 (deep drawing steel)
GB/T 2520-2000 (electroplated tin steel)
Industry Applications
| Sector | Critical Use Cases |
|---|---|
| Automotive | Body panels, structural components |
| Appliances | Housing units, compressor parts |
| Construction | Structural sections, roofing |
| Packaging | Metal containers, strapping |
Operational Economics
| Metric | This Mill | New Equivalent |
|---|---|---|
| Capital Investment | $2.1M | $5.8M+ |
| ROI Period | 16 months | 42+ months |
| Energy Consumption | 1,200 kW (peak) | 1,900 kW (peak) |
| Maintenance Cost | $18/ton | $32/ton |
Service Ecosystem
Pre-Commissioning:
Material trials (2,000 kg provided)
3D plant integration modeling
After-Sales Assurance:
18-month comprehensive warranty
Remote diagnostics with IoT connectivity
Lifetime spare parts availability
On-site training: Levels 1-3 certification
