｜What This Machine Solves
In hot rolling production of angle steel, channel steel, I-beam, and H-beam, straightening is the critical final process that determines qualification rate, customer approval, and market competitiveness.
Common pain points:
- Bent, twisted, or warped profiles after cooling
- High rejection & rework rates
- Low output & inefficient production rhythm
- Long changeover time between sizes
- Failure to meet standard straightness tolerances
DXJA-800 Multi-wire Straightening Machine is the high-performance, all-in-one solution for medium & large section steel rolling lines.
｜Installation Position
Typical layout in rolling mill:
Cooling bed exit roller table → DXJA-800 Straightening Machine → Cold shear / Product saw
｜Working Principle
Section steel passes through staggered contoured rolls and undergoes repeated elasto-plastic bending deformation to eliminate residual stress and original curvature.
The machine enables multi-wire simultaneous straightening for high efficiency & stable accuracy.
｜Main Structure
- Entry pinch roll unit
- Main straightening machine (roll system + drive + adjustment)
- Entry & exit guide guards
- Hydraulic system + oil lubrication + grease lubrication
- Electrical control system
｜Core Technical Parameters
📌 Pinch Roll
- Roll diameter: Φ340–380 mm
- Roll length: 800 mm
- Upper roll lift: hydraulic cylinder Φ80/56, stroke 540 mm
- Drive motor: 5.5 kW AC, 25–150 rpm
- Pneumatic pressure: 0.5 MPa
- Hydraulic pressure: 12 MPa
📌 Main Straightening Machine
- Main motor: 560 kW DC, 660 V
- Total installed power: 710.25 kW
- Roll configuration: 5 upper + 5 lower rolls
- Max roll diameter: 525 mm
- Roll length: 800 mm
- Line speed: 0.5–2.5 m/s
- Roll surface speed: 0.5–3 m/s
📌 Roll Adjustment
- Upper roll axial adjustment: ±15 mm (motorized)
- Lower roll vertical adjustment: 190 mm (motorized)
- Position control: high-precision encoder
- Guide adjustment: manual screw jack, stroke 80 mm
📌 Lubrication & Hydraulic
- Oil lubrication: 0.05 MPa, 30 / 60 L/min
- Grease lubrication: dual-line, No.3 MoS₂ lithium-based grease
- Hydraulic system: 12 MPa with dedicated roll-change power unit
｜Straightening Accuracy (GB/T 706-2016)
✅ I-beam: ≤2 mm/m; total ≤0.2% of length
✅ Channel steel: ≤3 mm/m; total ≤0.3% of length
✅ Angle steel: ≤3 mm/m; total ≤0.3% of length
✅ Web deflection: W ≤ 0.15d (d = web thickness)
✅ Angle tip right angle: α ≤ 50′
｜Production Capacity
Max output: 175 tons per hour
Multi-wire simultaneous straightening (up to 12 strands for small sizes)
Typical performance:
- Angle steel 80×80×10: 175 t/h
- Channel steel 65: 170 t/h
- I-beam 80: 113 t/h
- Angle steel 120×120 series: 83–98 t/h
｜Applicable Profiles
- Angle steel: 25# – 120#
- Channel steel: 50# – 160#
- I-beam: 80# – 160#
- H-beam: customizable roll pass
｜Full Scope of Supply (Turnkey Solution)
- Main machine (1 set of roll rings included)
- Oil lubrication station
- Grease lubrication station
- Roll-change hydraulic power unit
- Hydraulic & lubrication piping (≈150 kg)
- Electric starter cabinet
- Spare roll rings (4 sets): 3# angle steel (10 pcs) 7# angle steel (10 pcs) 6# channel steel (10 pcs) 10# channel steel (10 pcs)
｜Material & Quality
- Frame: Q345B welded structure
- Bearing housing: 35CrMo (quenched & tempered)
- Gears: 20CrNi2MoA (carburized & quenched)
- Shafts & roll rings: 42CrMo (quenched & tempered)
Built in accordance with GB/T 10095, GB/T 1801, GB/T 1184, JB/T 5000 series.
｜Key Advantages
✅ High precision meets international & national standards
✅ High output up to 175 t/h
✅ Heavy-duty design for 24/7 operation
✅ Fast roll change with pull-out & basket-type device
✅ Centralized lubrication & hydraulic systems
✅ One-stop turnkey supply
✅ Wide application for multiple profile types
｜Ideal For
- Section steel producers (angle, channel, I-beam, H-beam)
- New rolling line construction & upgrading projects
- EPC contractors & global steel traders
- Manufacturers pursuing high yield & low maintenance cost
｜About Us
We are a professional manufacturer focusing on steel rolling equipment and section steel straightening solutions.
Our DXJA-800 series is trusted by rolling mills worldwide for high stability, accuracy, and efficiency.
If you are planning a new line, upgrading equipment, or improving product quality,
feel free to contact us for:
- Technical proposal
- Layout design
- Quotation
- Delivery schedule
- Custom roll pass development
We look forward to long-term cooperation with global partners.
