I. Summary
The mill is intended for manufacturing of round pipe of Φ12mm-Φ50mm with thickness of 0.5mm–2.0mm from cold-rolled and hot-rolled coil strip by means of unclosed tubular blank subsequent with its subsequent welding into tube, edge heating by means of solid state high-frequency welder, longitudinal seam welding in rolls of tube welding machine, cooling, further sizing or shaping and on-stream cutting of endless tube in measured lengths.
Finished product will be of round, square or rectangular pipe.
II. The technical flow of the production line
{SteelTape}→→ Double-head un-coiler →→Strip-head Cutter and welder→→
Spiral accumulator→→Forming section(Flattening unit +Main driving unit +Forming unit +Guide unit +High frequency induction welding unit +squeeze roller)+ De-burr frame[De-burr frame remove the burr]→→Cooling unit →→ Sizing unit and straightener →→Flying saw under computer-control →→ Run-out table→→Semi-Automatic packing machine
III. Basic conditions:
a) Steel Pipe Specification
1. Pipe diameter: 12–50mm
Pipe Thickness: 0.5– 2.0mm
2. Square Pipe: 14X14mm –40X40mm
Rectangle Pipe: 10X20mm –25X50mm
Pipe Thickness: 0.5 – 1.6mm
3. Pipe Length: 6-9m
4. Length Tolerance: 0-4mm
b) SteelTape Specification
1. Material: Low Carbon steel & Galvanized steel
(δb≤500Mpa, δs≤235Mpa)
2. Steel Tape: Inner diameter: Φ508mm
Outer diameter: Φmax=2100mm
Strip steel width: 40mm-160mm
Strip steel thickness: 0.5mm-1.6mm
The maximum weight: 3.0 tons
c) Electricity
1. Dynamic power: AC380V±10%, 3phases, 50Hz±1.0%
2. Control Power: AC220V±10%, one phase, 50 Hz ±1.0%
d) Electric installed capacity: appro. 350KW
e) Cooling water
1. Reservoir[Reservoir for High Frequency equipment: 15 m3, one set
2. Reservoir for circulating cooling water: 15 m3, one set
f) Compressed air
1. Pressure: 0.4Mpa
2. Flow: 0.5m3/h
g) Production capacity
Annual output: 10000 ton, according to the yearly working days, daily working hours and the products.
h) Line speed: 50-120m/min