Durable Straightening Rollers for Metal Fabrication and Processing
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Product Details
| Customization: | Available |
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| Application: | Machinery Accessory |
| Standard: | GB, China GB Code |
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Basic Info.
- Model NO.
- GC-L77
- Surface Treatment
- Heat Treatment
- Production Type
- Mass Production
- Machining Method
- CNC Machining
- Material
- Steel
- Roller Material
- Alloy Tool Steel (42CrMo) High Chromium Cast Iron
- Surface Hardness
- HRC 58-62 (Steel Roller) Hra 85-90 (Tungsten Carbi
- Roller Diameter
- Φ80-600
- Roller Length
- 100-2000mm
- Radial Runout Tolerance
- ≤0.01-0.03mm
- Surface Roughness
- Ra 0.2-0.8um
- Coaxiality Error
- ≤0.015mm
- Roller Design
- Cylindrical Hyperbolic Roller (Pipe Straightening)
- Bearing Type
- Double-Row Cylindrical Roller Bearings (Bearing Ra
- Single Roller Load Capacity
- 50-3000kN
- Surface Coating
- Tungsten Carbide Coating (Hv1000-1400) Diamond COA
- Transport Package
- Standard Export Packaging
- Specification
- Can be customized
- Trademark
- GOCHAIN
- Origin
- China
- HS Code
- 7326909000
- Production Capacity
- 5000000
Packaging & Delivery
- Package Size
- 210.00cm * 25.00cm * 25.00cm
- Package Gross Weight
- 55.000kg
Product Description
The straightening machine rollers are the core components of the straightening equipment, made of high-hardness alloy steel or composite materials. They are arranged in pairs or groups, and by applying precise pressure, they force the bent metal sheets, pipes or profiles to be flattened or straightened. Their excellent wear resistance, high-precision geometry and strong load-bearing capacity directly determine the quality, efficiency and equipment life of the straightening, and are the key "steel backbone" to ensure the straightness of products in metal processing production lines.
Thermal-mechanical coupling treatment process
Gradient heat treatment: surface high-frequency quenching (≥HRC 60) → core tempering treatment (HRC 38-42)
Residual stress control: cryogenic treatment (-196ºC liquid nitrogen) + aging stress relief to ensure service deformation <0.01mm
Gradient heat treatment: surface high-frequency quenching (≥HRC 60) → core tempering treatment (HRC 38-42)
Residual stress control: cryogenic treatment (-196ºC liquid nitrogen) + aging stress relief to ensure service deformation <0.01mm
Surface working layer
Ultra-hard materials (such as tungsten carbide or ceramic coating) are used, with a hardness of HRA 90 or above, equivalent to 1/3 the hardness of natural diamond, ensuring resistance to micro-cutting wear of metal debris.
Ultra-hard materials (such as tungsten carbide or ceramic coating) are used, with a hardness of HRA 90 or above, equivalent to 1/3 the hardness of natural diamond, ensuring resistance to micro-cutting wear of metal debris.
Intermediate strengthening layer
Through plasma nitriding treatment, a 0.3-0.5mm compressive stress zone is formed, which effectively inhibits crack propagation and increases fatigue life by more than 3 times.
Through plasma nitriding treatment, a 0.3-0.5mm compressive stress zone is formed, which effectively inhibits crack propagation and increases fatigue life by more than 3 times.
Tough matrix
Using alloy steel such as 42CrMo, the core maintains a toughness-hardness balance of HRC 35-40 after deep quenching, and can withstand impact loads up to 3000kN without breaking.
Using alloy steel such as 42CrMo, the core maintains a toughness-hardness balance of HRC 35-40 after deep quenching, and can withstand impact loads up to 3000kN without breaking.
Full-process thermal treatment:
The blank is subjected to multi-directional forging to eliminate casting defects, and the material density is >99.5%
The gradient heat treatment forms a continuously changing hardness curve from the surface to the core (surface HRC 62 → transition layer HRC 55 → core HRC 40)
Finally, the metallographic structure is stabilized by -196ºC deep cold treatment, and the service deformation is compressed to within 5 microns
The blank is subjected to multi-directional forging to eliminate casting defects, and the material density is >99.5%
The gradient heat treatment forms a continuously changing hardness curve from the surface to the core (surface HRC 62 → transition layer HRC 55 → core HRC 40)
Finally, the metallographic structure is stabilized by -196ºC deep cold treatment, and the service deformation is compressed to within 5 microns
Straightening Machine Roller Core Parameter Table
| Parameter Category | Parameter Name | Standard Range | Unit | Engineering Significance |
|---|---|---|---|---|
| Basic Properties | Material Type | 42CrMo Alloy Steel / Cr15Mo3 High-Cr Cast Iron / WC-Co Carbide | - | Determines wear-resistance/toughness balance (carbide lifespan >10,000 hrs) |
| Roll Body Diameter | Φ80-600 | mm | Thin materials (<3mm): small rolls Φ80-150 Thick plates (>20mm): Φ300+ |
|
| Roll Body Length | 100-2000 | mm | Matches workpiece width (roll length = width + 100mm safety margin) | |
| Mechanical Properties | Surface Hardness | HRC 58-62 (Steel) HRA 85-92 (Cemented Carbide) |
HRC/HRA | High hardness resists wear (+15% lifespan per 1 HRC increase) |
| Core Hardness | HRC 35-42 | HRC | Ensures impact toughness (Charpy impact ≥40J) | |
| Radial Load Capacity | 50-3000 | kN | Calculated by material yield strength (Q235 steel: ≥150kN, titanium alloy: ≥800kN) | |
| Fatigue Cycle Resistance | 10~10 | cycles | High-cycle fatigue design (>10 cycles for aerospace grade) | |
| Precision Metrics | Radial Runout Tolerance | ≤0.005~0.03 | mm | Precision straightening requires ≤0.01mm (1/7 hair thickness) |
| Coaxiality Error | ≤0.015 | mm/m | Affects roll eccentric wear & machine vibration | |
| Surface Roughness | Ra 0.2~0.8 | μm | Mirror-finished rolls (Ra≤0.2μm) for precision strips, sandblasted (Ra0.8μm) for profiles | |
| Thermal Management | Operating Temp. Limit | -40ºC~300ºC | ºC | >150ºC requires heat-resistant alloys (e.g., H13 hot-work steel) |
| Cooling Water Flow | 2~20 | m³/h | Based on thermal power (0.5m³/h per kW) | |
| Thermal Deformation | ≤0.02 | mm | Deformation at 100ºC temp. rise (<0.005mm for precision grade) | |
| Dynamic Performance | Max. Linear Speed | 0.5~30 | m/s | High-speed straightening >15m/s (auto sheet lines) |
| Dynamic Balance Grade | G2.5~G6.3 | - | High-speed rolls require G2.5 (residual imbalance <1g·mm/kg) | |
| Structural Features | Bearing Housing Type | Double-row cylindrical roller / Spherical roller | - | High rigidity: cylindrical bearings Eccentric loads: spherical bearings |
| Cooling Channel Design | Axial straight / Spiral groove / Bionic fractal | - | Spiral groove: 40% higher heat transfer than straight holes | |
| Surface Treatment | Laser cladding / Plasma spray / CVD | - | CVD diamond coating: friction coefficient <0.05 | |
| Lifetime Metrics | Wear-resistant Layer Thk. | 3~15 | mm | WC layer >8mm allows 3 repairs |
| Overhaul Interval | 3000~20000 | hours | Depends on application (stainless steel: 1/3 lifespan of carbon steel) |
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