Problem
Cold rolled strip is smooth and precise, but any scratch, edge damage or over-forming during tube making immediately shows on the finished pipe and destroys the surface quality the customer paid for.
Cause
CR strip has a thin gauge tolerance but also a soft, easily marked surface; excessive roll pressure or misaligned passes create scratches and ripples, while dirty or worn rollers transfer marks onto the bright surface.
Solution
The ZY16 uses double-radius rollers and staged forming to apply gradual, even pressure, avoiding surface marking on CR strip. Precise gap control preserves the tight CR gauge through the weld, delivering a clean, high-finish Φ8-18mm tube, and the leveler is set gently so it does not re-mark the bright surface.
Key Engineering Data
- Double-radius rollers apply gradual pressure to avoid surface marks.
- Precise gap control preserves CR strip's tight gauge tolerance.
- Gentle leveler setting protects the bright CR surface.
- Delivers high-finish tube for furniture and decorative use.
| Parameter | Specification |
|---|
| Mill Model | ZY16 |
| Tube OD Range | Φ8-18 mm |
| Wall Thickness | 0.4-1.0 mm |
| Strip Width Range | 25-57 mm |
| Max Line Speed | 90 m/min |
| HF Welder Power | 100 kW Solid-State High Frequency |
| Strip Material | Hot Rolled / Cold Rolled / Galvanized Steel |
| Uncoiler | Double-Mandrel Pneumatic, 1.5-Ton Coil Capacity |
| Accumulator | 200 m/min High-Speed Cage |
| Strip Leveling | Seven-Roller Leveling Unit |
| Forming Stands | 5-Stand Rough + 3-Stand Precision |
| Roller Geometry | Double-Radius Forming Rollers |
| Roller Shafts | 42CrMo High-Strength Alloy Steel |
| Safety | Forming Stand Overload Protection |
Performance & Quality
On cold rolled strip, the ZY16 preserves surface quality because double-radius rollers apply gradual pressure and gaps are set to CR tolerance. The result is bright, scratch-free Φ8-18mm tube that meets furniture and decorative standards straight off the line, with minimal polishing downstream.
Application
For precision and bright-finish tube from cold rolled strip, including furniture, appliance, automotive and decorative tube where surface quality is a selling point.
Selection Guide
Choose this mill when you run cold rolled strip and need bright, scratch-free tube. Keep the leveler and rolls clean and deburred, and confirm strip gauge so gaps are set for CR tolerance.
Application Scenarios
Bright furniture tube, appliance frame tube, decorative and display tube, and precision automotive tube produced from cold rolled coil.
FAQ
Q1. Will the ZY16 scratch my cold rolled strip?
The double-radius rollers and staged forming apply gradual pressure, and precise gap control avoids the over-forming that marks CR surface, so scratches are minimized.
Q2. Is special tooling needed for cold rolled strip?
Gaps and pressure are tuned for CR gauge tolerance; specify cold rolled material when ordering so tooling is set correctly for the bright surface.
Q3. Can I produce bright finish tube directly?
Yes, the line is suited to bright-finish CR tube; final polishing is optional downstream depending on your finish target.
Q4. How do I keep the CR surface clean during forming?
Keep the leveler and rolls clean and deburred, and check roller condition regularly, since worn or dirty rolls are the main source of marks.
Q5. Can I skip polishing on CR tube?
In many cases yes, because the ZY16 avoids surface marking during forming, so the tube exits with a clean, bright surface ready for use.
Q6. Does the mill need a special foundation?
Yes, a level concrete foundation sized to the line is required; we provide the layout and foundation drawings with the order.
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