Output Bottlenecks in Small-Diameter Tube Lines
Small-diameter tube has thin margins, so profit depends on throughput. Mills that must slow down to hold weld quality or roundness leave money on the table, and any line that cannot sustain rated speed without defects fails to meet delivery windows.
Why Small-Diameter Lines Slow Down
At higher speed the weld has less time to fuse, the seam drifts more easily, and heat builds up faster than cooling can remove it. An unguided seam, weak roll shafts and insufficient coolant force operators to cut speed to keep quality, capping daily output.
The ZY20 High Speed Tube Mill Solution
A 100 kW solid-state HF welder with dedicated seam guidance and squeeze welding holds full fusion at up to 90 m/min, so speed does not cost weld quality.
≥10 t/h spray plus overflow-pool cooling removes heat fast enough to keep the body round, while a 7-roll leveler and double-radius pass feed the strip flat at speed.
42CrMo hardened roll shafts and overload-protected stands let the line run continuously, with the microcomputer flying saw tracking line speed for synchronized cutting.
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 High Speed Tube Mill Is Applied
High-volume furniture, structural and precision tube producers who need maximum daily output from a small-diameter φ10-26mm line.
How to Select a High Speed Tube Mill
Match your required meters-per-minute to the ZY20 rating of up to 90 m/min, confirm the welder power and cooling rate for that speed, and size your accumulator and uncoiler for continuous running.
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 High Speed Tube Mill
Can the ZY20 hold weld quality at 90 m/min?
Yes — solid-state HF welding with seam guidance keeps fusion complete at rated speed.
What limits line speed?
Weld fusion time and cooling capacity, both sized for 90 m/min on the ZY20.
Is the flying saw synchronized at speed?
The microcomputer flying saw tracks line speed for accurate synchronized cutting.
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