I.Resumo
The mill is intended for manufacturing of round pipe of Φ20mm-Φ76mm with thickness of 0.9mm–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 productwill be of round, square or rectangular pipe.
O processo de fabricação prevê o uso de tiras enroladas pré-cortadas nas larguras necessárias em máquinas de corte.
II. O fluxo técnico da linha de produção
{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. Condições básicas:
Pipe Thickness: 0.9-3.0mm
Rectangle Pipe: 10X20mm –40X80mm
Pipe Thickness: 0.9– 3.0mm
3.Pipe Length: 6.0m±3mm
b)Especificação da fita de aço
1.Material: Low Carbon steel (δb≤500Mpa, δs≤275Mpa)
Inner diameter: Φ480-Φ550mm
Outer diameter: Φmax=1600mm
Strip steel width: 60mm-240mm
Strip steel thickness: 0.9– 3.0mm
The maximum weight: 3.0 tons
Annual output: 20,000 ton, according to the yearly working days、daily working hours and the products.
h)Linha velocidade: 20-100m/min
1.1. Briefing: Tipo rotativo para troca fácil de bobinas, com freio pneumático
1.2. Parâmetros:
- Coil width: max.240mm
- Coil OD: max. Ø1600mm
- Coil ID: Ø 480- Ø 550mm
- Coil weight: max. 3.0 tons
1.3. Expansão do mandril por sistema hidráulico
1.4. A rotação da posição do mandril deve ser manual
1.5. Freio pneumático
2.Máquina de corte e soldagem de topo
2.1 Parâmetros de cisalhamento da máquina:
- Cutting by Pneumatic
- Width: ≤240mm
- Thickness: ≤4.0mm
2.2 Máquina de solda de topo manual
- TIG welding machine TIG
O acumulador de loop reverso é instalado entre a tesoura e a soldadora e a linha de conformação. Sua finalidade é dar tempo suficiente para a alimentação da nova bobina do desenrolador para a tesoura e a soldadora para cortar e unir a extremidade da nova bobina com a extremidade final da bobina anterior.
Velocidade de entrada (preenchimento) |
180m/min |
Velocidade de saída (linha) |
Máx. 100 m/min, operação contínua |
Capacidade de armazenamento |
400-800 metros |
4.1 Forming mill
4.1.1 Mill entry flattener by up-horizontal roll and below-horizontal roll, one positive seven-roll flattener, one pair of feeding vertical roll.
4.1.2 Forming mill consists of:
- Driven stand: 7 sets (Horizontal)
- Driven stand shaft: Φ80mm
- Material of shaft: 42CrMo
- Side roll stand: 8 sets(Vertical)
- Side roll stand shaft: Φ45mm
- Material of shaft: 40Cr
- Gear box & universal joint: 7 sets
- Material of gear box: cast steel
- Material of bevel gear: 20CrMnTi
- Main motor : 75kW Model: Z4-225-11 1 set
- Main redactor : ZLY224 1 set
4.2 Sizing mill
4.2.1 Sizing mill consist of:
- Driven stand: 5 sets (Horizontal)
- Driven stand shaft: Φ80mm
- Material of shaft: 42CrMo
- Side roll stand: 5 sets(Vertical)
- Side roll stand shaft: Φ45mm
- Material of shaft: 40Cr
- Gear box & universal joint: 5 sets
- Material of gear box: cast steel
- Material of bevel gear: 20CrMnTi
- Turkshead: with 4rollers*2sets
- One speed testing roller for CNC flying saw
- Main motor : 75kW Model: Z4-225-11 1 set
5.Seção de soldagem
5.1 A seção de soldagem consiste em:
- Seam guide unit: 1 set
- Squeeze stand: 2 rollers(diameter轴径: Φ45mm)
- De-burr frame: 1 set (2 heads)
- Horizontal unit for seam ironing: 2rollers
5.2 Seção de resfriamento
- Cooling trough: 1 set
- Cooling trough length: 3.0 m
5.3 Soldador de alta frequência de estado sólido (GGP250KW)
GGp200 kW
- Nominal power: 250kW
- Rated DC power: Pd=300kW
- Rated DC voltage: UdN=450V
- Rated DC current: IdN=670A
- The whole efficiency: η≥85%
- Output power: Pout>250kW
- Designed frequency: f=300~350kHz
- MOSFET inverter: 60kW×5
- Tank circuit output mode: no welding transformer output, secondary resonance
6. Serra de fricção voadora CNC
6.1 Corte voador, seção mecânica consiste em:
- 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
7.1 Run-out system consists of:
- Roller conveyer 15 meter (including packing box)15m;
- Revertido pneumaticamente;
Empurrado pneumaticamente;
8.EelétricoSistema de controle
8.1 Acumulador espiral
- A.C. driver,
8.2 Double D.C. drive and control for forming and sizing mill.
- D.C. driver, ,
- Main D.C. drive panel control(instrument etc.)
- Painel de operação do moinho (ajuste de velocidade, controle etc).
8.3 Sistema de controle de corte de voo
- Acionamento do carro da serra por motor DC 15KW
- Painel de operação LCD
(comprimento e configuração de lote, instrumento de controle etc.).
9.Rolos
9.1 Formação e dimensionamento de material de rolos
- Material: Cr12
- Dureza: 60 HRC +/-2
9.2 Welding rollers material
- Material : H13