HG89 is used to produce round pipe 1" - 3" and square tube 25x25mm - 70x70mm.
I. Summary
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The mill is intended for manufacturing of round pipe of Φ32mm-Φ89mm with thickness of 1.5mm–4.5mm 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.
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:
1. Round Pipe: 32-80mm
Pipe Thickness: 1.5 – 4.5mm
2. Square & Rectangle Pipe: 25X25mm –70X70mm
Pipe Thickness: 1.5 – 4.0mm
3. Pipe Length: 6.0m – 12.0m
4. Length Tolerance: 0-6mm
b) SteelTape Specification
1. Material: Carbon steel (δb≤500Mpa, δs≤235Mpa)
2. Steel Tape: Inner diameter: 470-510mm
Outer diameter: max=1500mm
Strip steel width: 100mm-280mm
Strip steel thickness: 1.5mm-4.5mm
The maximum weight: 4.0 tons
c) Electric installed capacity: appro. 600KW
d) Size of the whole line: appro. 70X6m
e) Line Speed: 20-70m/min
IV . Forming & sizing section
4.1 Forming mill gearbox, universal joint
4.1.1 Mill entry flattener by up-horizontal roll and below-horizontal roll, one positive five-roll flattener, one pair of feeding vertical roll.
4.1.2 Forming mill consists of:
- Driven stand: 7 sets (Horizontal)
- Driven stand shaft: Φ 90mm
- Material of shaft: 40Cr
- Side roll stand: 8 sets(Vertical)
- Side roll stand shaft: Φ50mm
- Material of shaft: 40Cr
- Gear box & universal joint: 7sets
- Material of gear box: cast steel
- Material of gear: 20CrMnTi
- Main motor: 90kW Model: Z4-225-31 1 set
- Main redactor: 1 set
- Horizontal roller frame with worm gear & shaft. adjust up and down at same time and level.
4.2 Sizing mill gear box, universal joint
4.2.1 Sizing mill consist of:
- Driven stand: 5 sets (Horizontal)
- Driven stand shaft: Φ 90mm
- Material of shaft: 40Cr
- Side roll stand: 5 sets (Vertical)
- Side roll stand shaft: Φ50mm
- Material of shaft: 40Cr
- Gear box & universal joint: 5 sets
- Material of gear box: cast steel
- Material of gear: 20CrMnTi
- Main motor: 75kW Model: Z4-225-11 1 set
- Main redactor: 1 set
- 4 sets single head Turk’s head, with 4 rollers*4sets
- One speed testing roller with air cylinder for CNC flying saw
- Horizontal roller frame with worm gear & shaft. adjust up and down at same time and level.
