HG76 Carbon steel tube mill for diameter 10-89mm

Summary of Carbon steel tube mill

The mill is intended for manufacturing of round pipe of Φ20mm-Φ89mm with thickness of 1.0mm–3.5mm from cold-rolled and hot-rolled coil strip by means of unclosed tubular blank 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.

III. Basic conditions of HG50 Tube mill:
a) Steel Pipe Specification
1. Pipe diameter: Φ20mm-Φ89mm
Pipe Thickness: 1.0mm–3.5mm
2. Square pipe example: 15x15-70x70mm Max for square pipe
Rectangle pipe example: 15X30-80x60 Max
Pipe Thickness: 1.0mm–3.5mm
3. Pipe Length: customize Max is 12
4. Length Tolerance: 0-6mm
b) Steel Pipe Specification
1. Material: Low Carbon steel
2. Steel Tape: Inner diameter: Φ470-510mm
Outer diameter: Φmax=1500mm
Strip steel width: 40mm-160mm
Strip steel thickness: 0.4mm-2.5mm
The maximum weight: 1.0 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. 250KW
e) Cooling water
1. 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: 30-90m/min
IV. Equipment makeup and main parameters of single unit:
1. Double-head un-coiler
1.1. Briefing: Rotary type to change coils easily, with a pneumatic brake
1.2. Parameters:
- Coil width: max.160mm
- Coil OD: max. Ø1500mm
- Coil ID: Ø 470- Ø 510mm
- Coil weight: max. 1.0 tons
1.3. Mandrel expansion by Pneumatic
1.4. Mandrel position rotation shall be manual
1.5. Pneumatic brake

5. Welding section
5.1 HG50 welded tube mill Welding section consist of:
- Seam guide unit: 1 set
- Squeeze stand: 2 rollers(Ø45mm)
- De-burr frame: 1 set (2 heads)
- Horizontal unit for seam ironing: 2 rollers
5.2 Cooling section
- Cooling trough: 1 set
- Cooling trough length : 2.0 m
5.3 Solid state High frequency welder(GGP150 KW)
Character of solid state induction system:
a) Nominal power: 150kW
b) Rated DC power: Pd=180kW
c) Rated DC voltage: UdN=450V
d) Rated DC current: IdN=400A
e) The whole efficiency: η≥85%
f) Output power: Pout＞150kW
g) Designed frequency: f=350~400kHz
h) MOSFET inverter: 60kW×3
i) Tank circuit output mode: no welding transformer output, secondary resonance
j) With water-water cooler for welder

6. CNC flying friction saw

6.1 Flying cut-off, mechanical section consist of:

- Saw disk: OD600mm×ID80mm×4.0mm

- Saw waver: Pneumatic

- Pipe clamp: Pneumatic

- Saw carriage travel: Rack and pinion with gear lath

- Motor for travel: DC 15KW

- Motor for sawing: AC 22KW

- Length Tolerance: 0-6mm