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HOPEX-Highway Guardrail
Every guardrail panel is the product of a mechanical argument: how much bend per station, how rigid the shafts, how hard the blades. This page explains the design logic behind the guardrail cold roll forming machine.
Cold roll forming shapes strip below its recrystallization temperature, using the pressure of rotating roller pairs instead of heat or heavy impact. Because deformation is distributed over many small steps, the steel retains its original strength, the surface finish is preserved, and the profile holds tight tolerances over very long runs. That is why guardrail — a long, repeated, safety-critical profile — is produced almost exclusively this way.
Station count decides both profile quality and forming force. Too few stations means each bend is aggressive, the material work-hardens unevenly and springback becomes unpredictable. With 15 – 18 stations each takes only a fraction of the total bend, so material flows smoothly, springback is controlled, and the finished profile matches the roller geometry panel after panel.
Forming rollers are only as accurate as the shafts carrying them. 120 mm shafts are sized so deflection stays negligible under the load of 2.4–4.0 mm strip. Low deflection keeps roller gaps parallel across the strip width — the mechanical condition for a profile that does not twist, flare or drift.
| Design factor | Value | Engineering purpose |
|---|---|---|
| Shaft diameter | 120 mm | Deflection control under side load |
| Station count | 15 – 18 rows | Distributes bend, limits springback |
| Drive | Dual 22 kW with K107 reducer | Constant torque, smooth rotation |
| Blade hardness | Cr12, HRC 58–62 | Edge retention on coated strip |
The cut is the last thing that happens to the panel and must not degrade what forming built. Cr12 blades quenched to HRC 58–62 cut cleanly through the full thickness range without burrs that would need removal before installation. Punching is PLC-synchronized with strip speed, holding hole spacing at any forming rate.
| Parameter | Value | Note |
|---|---|---|
| Product name | highway guardrail roll forming machine | W-profile highway barrier panels |
| Model number | hopex-guardrail roll forming machine | HOPEX standard configuration |
| Machine type | Roll Forming Machine | Cold roll forming, continuous line |
| Suitable material | Q235, galvanized steel / stainless steel / zinc-aluminum-magnesium alloy | Four material groups, no tooling change |
| Forming thickness | 2.4 – 4.0 mm (0.09 – 0.16 in) | Covers common guardrail standards |
| Feeding width | 720 mm (28.35 in) | Customizable to your coil width |
| Forming speed | 5 – 15 m/min (16.40 – 49.21 ft/min) | Adjustable to material grade |
| Rolling station | 15 – 18 rows | Progressive forming sequence |
| Cutting blade | Cr12, quenched treatment HRC 58–62 | Edge hardness for long runs |
| Diameter of shaft | 120 mm | Low deflection under forming load |
| Main motor power | Dual 22 kW motors with K107 reducer | Steady torque across speed range |
| Voltage | 380 V | Three phase supply |
| Dimension (L×W×H) | 14000 × 2400 × 1200 mm (551.18 × 94.49 × 47.24 in) | Line footprint |
| Weight | 60000 kg (132277.36 lb) | Frame mass for vibration damping |
| Core components | Engine, PLC, Gearbox, Gear, Pump, Bearing, Motor, Pressure Vessel | Established component suppliers |
| Warranty | 2 years | Parts replacement and repair |
| Place of origin | Tianjin, China | HOPEX manufacturing base |
Built in Tianjin and delivered with video outgoing inspection and a machinery test report. Installation guidance and operator training are provided, and the 2-year warranty covers parts replacement and repair.
