C Purlin Roll Forming Machine — Automatic Steel Channel Production Line
This automatic C purlin roll forming machine produces high-precision C-shaped steel channels for steel structure buildings, warehouses, factories, and solar mounting systems. Equipped with an intelligent PLC touchscreen control system, the machine enables millimeter-level size adjustment across multiple C purlin profiles with a single-knife gapless shear that eliminates blade changes between sizes. The heavy-duty archway frame with 40mm reinforced steel plates ensures stability and long service life under continuous industrial operation.
Key Product Features
| Feature |
Specification |
| Control System |
Intelligent PLC with touchscreen HMI, self-developed programming |
| Size Changeover |
4-motor encoder system, full size switch in approximately 1 minute |
| Forming Rows |
15-18 rows (configurable based on profile complexity) |
| Frame Construction |
400H-450H archway frame, 40mm thick steel plate, reinforced ribs |
| Shaft Specification |
Φ85-95mm, 40Cr alloy steel, precision ground and chrome plated |
| Drive System |
Hydraulic motor drive with adjustable speed control |
| Chain Size |
2-inch heavy-duty industrial transmission chain |
| Shear Type |
Hydraulic stop-cut gapless single-knife system |
| Frame Machining |
12-meter CNC milling machine, 0.05mm flatness tolerance |
| Mold Wheel Material |
Bearing steel GCr15, 6-step process, HRC 58-62 hardness |
| High-Wear Wheels |
Cr12MoV alloy steel for side, diagonal, and straightening rollers |
| Surface Treatment |
Shot blasting + electrostatic powder coating |
| Welding Process |
CO2 gas-shielded welding, slag-free and high-strength joints |
| Decoiler Capacity |
Heavy-duty cantilever decoiler, supports up to 5-ton coils |
Profile Range
| Dimension |
Range |
| Bottom Width (W) |
75-300 mm |
| Side Height (H) |
40-80 mm |
| Lip Width (L) |
10-20 mm |
| Material Thickness (T) |
1.0-2.5 mm (galvanized steel / cold-rolled steel coil) |
| Yield Strength |
235-345 MPa |
| Coil Width |
Calculated per profile: W + 2H + 2L + margin |
Production Line Layout
| Component |
Length (mm) |
Description |
| Decoiler |
1,100 |
Cantilever type, manual expansion, 5-ton capacity |
| Leveling Device |
3,500 |
7-roller straightening with entry guide system |
| Forming Unit |
8,950 |
15-18 station progressive roll forming with inline punching |
| Hydraulic Shear |
Integrated |
Stop-cut gapless single-knife, all-size compatible |
| Output Bracket ×2 |
3,000 × 2 |
Run-out table with side guides and length stop |
| Control Cabinet |
Floor-standing |
PLC touchscreen HMI with emergency stop and diagnostics |
| Hydraulic Pump Station |
Under-mounted |
Supplies shear cylinder and drive motor circuit |
Total Line Length: Approximately 19.6 meters | Minimum Floor Space: 20m × 3m (plus 1.5-2m clearance per side for operator access)
Production Process Flow
| Step |
Process |
Description |
| 1 |
Coil Loading |
Steel coil mounted on decoiler, fed into leveling device |
| 2 |
Leveling & Straightening |
Strip flattened through 7-roller leveling unit |
| 3 |
Pre-punching |
Hole patterns punched per customer design specifications |
| 4 |
Progressive Forming |
Strip passes through 15-18 roller stations, gradually shaped into C profile |
| 5 |
Straightening & Sizing |
Final roller pass corrects twist and camber, ensures dimensional accuracy |
| 6 |
Hydraulic Cut-to-Length |
Shear cuts finished purlin at programmed length, ±2mm accuracy |
| 7 |
Output & Stacking |
Finished C purlins slide onto run-out table for manual collection |
Competitive Advantages
| Dimension |
This Machine |
Typical Competitor |
| Frame Plate Thickness |
40mm archway with reinforced ribs |
30mm flat plate |
| Frame Machining |
12m Taiwan CNC, 0.05mm flatness |
Shorter bed, lower precision |
| Mold Wheel Process |
6-step + hard chrome plate, HRC 58-62 |
4-step, no chrome plating |
| Shear System |
Single-knife gapless, all sizes |
Two-knife, blade changes required |
| Shaft Material |
40Cr alloy steel, Φ85-95mm |
Φ70-80mm standard steel |
| Critical Wear Wheels |
Cr12MoV high-wear alloy |
Standard bearing steel |
| PLC Control |
Self-developed, remote support capable |
Outsourced, limited support |
| Decoiler Capacity |
5-ton heavy-duty |
3-ton standard |
| Surface Finish |
Shot-blasted + electrostatic powder coat |
Wet paint / basic coating |
Quality Assurance & Certifications
- ISO 9001 quality management system certified
- CE certification for European market compliance
- High-tech enterprise designation with multiple patents
- Complete in-house inspection equipment and QC protocols
- First piece off the production line is a finished product — zero trial waste
- CO2 gas-shielded welding throughout for slag-free high-strength structural joints
After-Sales Service
- On-site installation and commissioning by factory-trained technicians
- Comprehensive operator training and detailed video operation guides
- 24/7 remote engineering support via video call and instant messaging
- Self-developed PLC control system — any electrical issue resolvable through one video call
- 12-month warranty on main machine and control system
- Lifetime technical support and spare parts supply
Applications
- Steel structure industrial buildings and warehouses
- Commercial building frameworks and mezzanine floors
- Solar panel mounting support structures
- Agricultural buildings, barns, and equipment sheds
- Pre-engineered building (PEB) systems
- Container house secondary beams and structural frames
- Highway guardrail posts and structural support members
