Φ235-Φ400mm ERW Tubemill

machine was made in 2004, is still on line at present

1. Technical performance

1.1 coil thickness: 5-12mm

coil width: 600-1250 mm

material: API X60

coil OD: MaxΦ 2000 mm

coil ID:Φ610-Φ760 mm

coil weight: max20t

1.2 finished products

tube OD:Φ235-Φ400mm

wall thickness: 5-12mm

tube length: 8-30m

tube Weight: max2713 kg

1.3 production mode

Forming method: row roll forming method.

Welding method: high frequency welding, medium frequency annealing (reserved).

1.4 unit operating speed: 10-30m / min

1.5 annual production: 120,000 tons

2. Unit process flow

Raw steel coil - uncoiling - head removal - leveling - feeding looper - centering - shear butt welding - centering - pinch roller - spiral horizontal looper - pinch conveyor - centering - centering - feeding - forming - high frequency welding - cooling - ultrasonic flaw detection (reserved) - air cooling - anti torsion device - medium frequency annealing (reserved) - water cooling (reserved) --Sizing - cutting - tube  delivery - trimming area - material storage area - flat head chamfering - hydraulic test - post hydraulic inspection - finished product inspection - weighing, length measurement, marking - Storage

3. Introduction to main equipment

3.1 uncoiler

Technical parameters: coil thickness: 5-12mm

coil width: 600-1250mm

material: API X60

coil OD: Max Φ 2000mm

coil ID: Φ610-Φ760mm

Steel coil weight: max20t

-The double cone hydraulic alignment is adopted, the feeding trolley is used for coil preparation, the feeding trolley is raised and lowered by hydraulic pressure, and the cone head is driven by motor and reducer to open the coil actively.

-The transmission motor is 15kw, the uncoiling speed is 15m / min, and the trolley is driven by the motor.

3.2 head remover

The hydraulic swing blade head is adopted, and the upper pressing roller is used to uncoil actively.

3.3 pinch leveler

Technical parameters: coil thickness: 5-12mm

coil width: 600-1250mm

material: X60

-Leveling roll 5 (upper 2 / lower 3) is active and pressed down hydraulically.

-DC motor for transmission is 55kW, and the running speed is 55m / min.

3.4 shear welding machine

Technical parameters: coil thickness: 5-12mm

coil width: 600-1250mm

material: X60

-The hydraulic up cutting shear cuts the plate head and plate tail, and is provided with a plate head and plate tail collection groove.

-Butt weld the plate head and plate tail. Hydraulic lifting butt welding table.

-Butt welding method: CO2 automatic welding. Welding speed: 0.5-1.5m/min

3.5 pinch conveyor

Technical parameters: coil thickness: 5-12mm

coil width: 600-1250mm

speed: Max 55m / min

-Delivery roll diameterΦ280mm motor dc160kwHydraulic press down.

-The machine has its own protection function and can operate normally when the plate thickness changes suddenly.

3.6 spiral horizontal looper

Technical parameters: coil thickness: 5-12mm

coil width: 600-1250mm

material: X60

Drive motor DC55kw

3.7 pinch roll

Technical parameters: coil thickness: 5-12m

coil width: 600-1250mm

speed: Max 30m / mm

Delivery roll diameterΦ280mm, motor DC90kw, hydraulic pressing down.

3.8 feeder

Technical parameters: coil thickness: 5-12mm

coil width: 600-1250mm

speed: max30m / min

-Clamping before break down

-Feed roller diameterΦ280m, motor dc45kw, hydraulic press down.

3.9 forming machine

Technical parameters: steel pipe specification:Φ235-Φ400mm

Steel pipe wall thickness: 5-12mm

Steel pipe material: X60

-The adjustable roll arrangement is adopted for forming, and the roll arrangement is passive.

-3 fin pass machine, pressing mode: electric.

-The 3 fin pass machine are all driven separately, and the motor is DC45KW × 3.

 horizontal shaft diameter: 220mm, vertical shaft diameter:

-Newly added molding machine entrance rent molding bending power rack, equipment weight 20ton

Add 1 forming bending frame:

The cover can be opened quickly

The upper roll is pressed down electrically, and the height of the lower roll is adjustable:

Gear box transmission is adopted (transmission type of existing sizing machine)

Separate drive, DC motor.

-The equipment weight of arc vertical roller is 5ton

1 set of arc vertical roller: placed behind the new booster bending frame.

Straight top side pressing screw rod (non cantilever type)

Manual adjustment of vertical roll.

3.10 welding device

Technical parameters: steel pipe specification:Φ235-Φ400 mm

Steel plate wall thickness: 5-12mm

Welding method: high frequency welding

Welding speed: 10-30m / min

-The 4 roller extrusion welding device has the advantages of reasonable mechanism setting, convenient adjustment and easy disassembly.

-High frequency welding machine, 800KW.

-Remove internal and external burrs.

3.11 sizing machine

Technical parameters: steel pipe specification:Φ235-Φ400mm

Steel plate wall thickness: 5-12mm

Steel pipe material: X60

-4 roll sizing, 3 in total

-Each drive is driven separately, and the motor is DC90KW×3。

-With Turkish head.

3.12 hobbing machine

Technical parameters: tube OD: Φ235-Φ400mm

coil thickness: 5-12mm

material: X60

-Pneumatic operation mode is adopted

-Cutter rotating motor AC75KW

-Roll cutting flying saw, equipment weight 1ton

Redesign the hobbing head to ensure Φ235-Φ400mm Adjustment range

3.13 hydraulic system

Technical parameters: system working pressure: 12MPa, 20MPa

-The hydraulic station is composed of pump station, valve station and pipeline.

-Rexroth series is selected as the valve.

3.15 electric control system

-The electric control system consists of DC control system, AC control system and PLC control system.

-The components of the system are produced by Chinese famous brand manufacturers or joint venture manufacturers.

4. Installed capacity of the unit: (total motor power DC900KW + AC250KW + high frequency welding machine 800KVA) total:

1950KW           

5. Equipment name (scope of supply)

 ※Provide:

  total weight: 550 tons

Mechanical manufacturing blueprint 2 sets

Installation layout

Roll drawing 2 sets

Inner roll frame drawing 2 sets