I. Summary
The Machine is intended for manufacturing round pipe of Φ20mm-Φ50mm with thickness of 0.8mm–3.0mm 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.
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 →→Cooling unit →→ Sizing unit and straightener →→Flying saw under computer-control →→ Run-out table
III. Basic conditions:
a) Steel Pipe Specification
1. Pipe diameter: Ø20 –Ø50mm
Pipe Thickness: 0.8 – 3.0mm
2. Square & Rectangle Pipe: 15X15mm –40X40mm
Pipe Thickness: 0.8 – 2.0mm
3. Pipe Length: 6.0m – 9.0m
4. Length Tolerance: 0-6mm
b) SteelTape Specification
1. Material: Carbon steel (δb≤500Mpa, δs≤235Mpa)
2. Steel Tape: Inner diameter: Φ470-510mm
Outer diameter: Φmax=1500mm
Strip steel width: 60mm-160mm
Strip steel thickness: 0.8mm-3.0mm
The maximum weight: 1.5 tons
c) Electric installed capacity: appro. 400KW
d) Size of the whole line: appro. 45X5m
e) Line Speed: 40-100m/min
Forming & sizing section
4.1 Forming mill gearbox, universal joint
4.1.1 Mill entry flattener by five-roll passive levelling, one pair of sending roll, two pairs of vertical roll
4.1.2 Forming mill consists of:
- Driven stand: 7 sets (Horizontal)
- Driven stand shaft: Ø60mm
- Material of shaft: 40Cr
- Side roll stand: 8 sets(Vertical)
- Side roll stand shaft: Ø40mm
- Material of shaft: 40Cr
- Gear box & universal joint: 7sets
- Material of gear box: cast steel
- Material of gear: 20CrMnTi
4.2 Sizing mill gear box, universal joint
4.2.1 Sizing mill consist of:
- Driven stand: 5 sets (Horizontal)
- Driven stand shaft: Ø60mm
- Material of shaft: 40Cr
- Side roll stand: 5 sets(Vertical)
- Side roll stand shaft: Ø40mm
- Material of shaft: 40Cr
- Gear box & universal joint: 5 sets
- Material of gear box: cast steel
- Material of gear: 20CrMnTi
4.2.2 2 setsTurk’s head, with 4 rollers*2sets
4.2.3 One speed testing roller with air cylinder for CNC flying saw
4.3 Main motor: 100kW Model: Z4-250-31 1 set
Main reducer: 1 set