Inconsistent Weld Fusion from Outdated Welders
A tube is only as strong as its weld, and inconsistent fusion from tube-type or worn welders leaves weak seams that split in bending or leak in service. Mills chasing stable weld quality on φ10-26mm thin-wall tube need repeatable, controllable heat input.
Why Weld Fusion Becomes Inconsistent
Older or under-powered welders struggle to hold heat input as line speed and wall thickness change, so the seam over- or under-fuses. Without positive seam guidance the edges drift off-center, and inconsistent squeeze pressure leaves voids or excessive flash at the weld.
The ZY20 HF Welding Tube Mill Solution
A 100 kW solid-state HF welder delivers stable, adjustable heat across the full φ10-26mm / 0.4-1.5mm range, holding consistent fusion at up to 90 m/min.
Dedicated seam guidance locks the edges before squeeze rolls complete fusion, and adjustable squeeze pressure matches the wall for a clean, strong weld.
Automatic outside-burr removal then clears the bead, so the welded tube moves cleanly into sizing without surface defects.
Technical Specifications of the ZY20 Tube Mill
| Parameter | Specification |
|---|
| Tube outside diameter | φ10–26 mm |
| Wall thickness | 0.4–1.5 mm |
| Rated production speed | up to 90 m/min |
| Raw material | HR / CR low-carbon steel, galvanized steel |
| HF welder power | 100 kW solid-state |
| Forming stands | 5 rough + 3 finish |
| Sizing stands | 6 horizontal + 6 vertical |
| Leveling rolls | 7-roll precision leveler |
| Cut length / precision | 4–8 m, ±3 mm |
| Coolant flow | ≥10 t/h spray + overflow pool |
| Roll shaft material | 42CrMo quenched & tempered + HF hardened |
Complete Continuous Production Process
Every ZY20 runs one continuous flow from coil to finished cut tube. An uncoiler feeds strip through a 7-roll precision leveler that removes coil-set, then double-radius forming shapes it in 5 rough and 3 finish stands without edge wave. A 100 kW solid-state HF welder fuses the seam under squeeze pressure with a dedicated seam guide, and an automatic outside-burr unit clears the bead immediately. ≥10 t/h spray plus overflow-pool cooling locks the shape, the 6-horizontal + 6-vertical sizing train sets the diameter, and a 4-roll Turk head straightens the tube before the microcomputer flying saw cuts 4–8m lengths to ±3mm. Overload-protected stands and 42CrMo hardened shafts keep the whole line stable over long runs.
Where the ZY20 HF Welding Tube Mill Is Applied
Welded steel tube for furniture, structural, precision and galvanized applications where a strong, repeatable HF weld is the critical quality driver.
How to Select an HF Welding Tube Mill
Confirm your wall range and speed, then verify the welder power (100 kW solid-state on the ZY20) covers your material mix. Check seam guidance and squeeze control for repeatable fusion, and confirm cooling capacity after the weld.
Installation, Support and After-Sales
The ZY20 ships as a turnkey package with layout and foundation drawings so you can prepare the site before delivery. Engineer-led on-site installation and commissioning bring the line to rated output, with operator training to hand over a running mill. A one-year warranty with spare-parts support protects the investment, and because the line accepts HR, CR and galvanized coil, you can adapt to changing material costs and market demand without re-tooling.
Frequently Asked Questions About the ZY20 HF Welding Tube Mill
Why solid-state instead of tube-type welding?
Solid-state output is stable and adjustable, giving repeatable fusion across the wall range.
How is the seam kept centered?
A dedicated seam guide positions the edges before squeeze welding.
What power is the welder?
100 kW solid-state, sized for φ10-26mm and 0.4-1.5mm at 90 m/min.
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