Problem
When a mill is pushed to high speed, the strip becomes unstable. Coil changes stop the line, tension surges pull the weld seam off-center, and forming rollers heat up and shift, causing scrap and downtime that erase the speed gain.
Cause
Speed amplifies every upstream variation. Without a buffer store, the line must slow for each coil change; without stable tension, the weld gap oscillates at speed; and without heat management, roller geometry drifts under friction load as bearings and shafts warm.
Solution
The ZY16 uses a 200m/min high-speed accumulator so coil changes never stop the forming line, and staged five-plus-three forming keeps the strip path stable at 90m/min. Roller shafts in 42CrMo resist thermal drift, holding geometry under sustained high-speed running, while the solid-state welder tracks speed to keep weld heat constant.
Key Engineering Data
- 90m/min maximum line speed for high-volume Φ8-18mm output.
- 200m/min accumulator keeps the line running through coil changes.
- Solid-state HF welder follows line speed to hold weld heat steady.
- 42CrMo shafts resist heat-related geometry drift at sustained speed.
| 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
At 90m/min the ZY16 sustains output because the accumulator removes coil-change stops and the solid-state welder tracks speed. The 42CrMo shafts hold geometry under the heat of continuous running, so a full shift keeps weld quality without frequent roll correction, maximizing meters per shift.
Application
Suited to high-volume runs of Φ8-18mm pipe such as furniture tube, conduit and fence products where output per shift drives unit cost.
Selection Guide
Choose this mill if your order book needs sustained 90m/min output on Φ8-18mm. If you run frequent short batches with many size changes, a slower line with quick-change tooling may give better overall utilization.
Application Scenarios
High-volume furniture tubing, continuous conduit production, and fence or handrail tube where daily tonnage determines profitability.
FAQ
Q1. Is 90m/min the continuous or peak speed?
90m/min is the maximum design line speed; the practical continuous speed depends on wall thickness and the weld heat required for the material, so thinner strip runs faster than thicker strip.
Q2. How does the line keep running during coil changes?
The 200m/min accumulator stores strip ahead of the forming section, so the line keeps producing while a new coil is loaded and welded to the tail.
Q3. Does high speed affect weld quality?
The solid-state HF welder tracks line speed automatically, keeping heat input constant so weld quality is maintained across the speed range, including ramp-up and steady running.
Q4. What limits maximum speed?
Material, wall thickness and required weld heat set the practical ceiling; the machine's 90m/min rating is the design maximum for the Φ8-18mm range.
Q5. How much output can I expect per shift?
It depends on OD and wall, but sustained 90m/min running without coil-change stops typically delivers far more meters per shift than a start-stop line.
Q6. What drives the forming stands?
The stands are mechanically driven and synchronized to line speed, with the solid-state welder and accumulator coordinated for continuous production.
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