High Frequency Welded Pipe Mill API Tube Mill 325-530mm Diameter

• Loading car

The coil car is used for make the steel coil from loading position to uncoiler. At the same time lift oil cylinder, so that the steel coil inner hole is accurately set on the mandrel of the uncoiler, the uncoiler tension, push back to the original position.

Bore of lifting cylinder: Φ250mm

Hydraulic system pressure: 12Mpa

Maximum lifting force of lifting cylinder: 20T

Number of guide rods: 4

Trolley traveling motor: AC 4KW

Traveling speed of trolley: 10m/min

Trolley travel: 6m

• Uncoiler

The uncoiler is of the structure of single expansion and cantilever mandrels. It contains two main parts: main body and the fixed base. The main body is equipped with pneumatic system to satisfy the needs of expanding, contracting and braking of the mandrels.

• Straightener unit

This unit is main used to lead the new coil steel head feed into the flattener unit after uncoiler unit bring the coil into the working place.

Positive and negative two-way loading.

External diameter of the press roller: Φ250mm

Pressure roller drive motor: AC 7.5KW

Unwind speed: 15m / min

• Flattener unit

This unit is main used to flatten the head and trail of the strip steel and prepare for the next step cutting and shear welding so as to ensure the strip steel opposed flate and straight in the shear welding.

Flattener level and pressing capability:

Transmission motor: DC75KW

Lead material speed: 8-40m / min

Paint roller: Φ100×120(two)

Lead roller Diameter: Φ260×1600mm, Material: 42CrMo

Flat roller diameter: Φ200×1600mm, Material: 42CrMo

Lead roller pressure down cylinder: φ120×90mm

• Automatic shear and welder

Used to cut off the irregular part of the tape head and tail, and align the tape tail of the previous coil with the tape head of the next coil, and weld them together to continuously feed the looper.

Structural form: shear welding bed, pinch feeding device, double centering device, double shearing shearing system, shearing plate system, welding bottom plate driving system, etc.

Material performance: The yield strength is 621MPa

Plate ter drive motor: DC11KW

Plate ter adjustment motor: AC4KW

Hydraulic station motor: 55KW

Welder gun walking motor: DC2.2KW

External diameter of the clip delivery roller: φ320mm

• Horizontal accumulator 16M

This machine is between shear welder and host (forming sizing mill) ,use for after a roll of strip steel are used up, before the next roll strip since prepared from uncoiling, shearing and butt welding time to ensure that the host (forming sizing mill) continuous production and store enough strip steel.

This unit is main include in press & carry material device, accumulator assemble, carry off material unit, electric control unit

specification:

• Forming & Sizing

The forming & sizing unit is the vital equipment to the pipe mill line. This unit abide by the roll frame theory. It could continue process some specification steel tube by no-contact welding, that is carrying some strip steel to this unit and let it passing the frame roll to frame tube raw, and then take the electric fluid together on the tube welding surface so as to treat the tube temperature higher to suit welding by the pressing roll welding, and then after cooling, forming sizing and flattener to product what is your demand tube.

• Milling Saw

When the forming & sizing part sends the formed steel pipe to the saw, the saw car tracks to be synchronized with the pipe speed. Clamp the tube. The two sawing systems installed on the turntable take the saw blade to rotate on its own, and feed under the drive of the feed AC servo motor. The sawing system performs compound movement in the turntable and its own feed, and cuts the steel pipe along the cross-sectional shape track of the piece to be cut.Then each system relaxes back to its original position and waits for the next working cycle.

Parameter:

AC spindle motor: 22KWX2

AC drive servo motor: 45KW

Large plate rotation: 15KW

Feed motor: 4.4KWX2

Saw blade diameter: 400mm

Sawing accuracy: ≤±3mm

Cutting method: double saw blade, milling type

Tracking speed: the same as the unit speed

Equipment function: manual, automatic

Control method: AC servo positioning

Hydraulic system pressure: 12Mpa

Cutting feed adopts polar coordinate method

• Transit roller + Unloading Rack

The pipes run along the Transit roller and to be automatically moved onto the Bench.

Length:

Air cooling: 50 meters

Blanking: 24 meters

Flat head: 24 meters

Hydraulic test: 24 meters

• Hydraulic testing machine

Φ325～Φ530mm Double-station hydraulic testing machine

Technical performance parameters:

Diameter range of test steel pipe: φ219～φ530 mm

Test steel pipe thickness: 4～9mm

Length of test steel pipe: 6～10m

Test steel pipe material: Q235, Q345, X70

Maximum test pressure of steel pipe: Max 20.7MPa

Holding pressure time (settable): 3～15sec

Number of roots per test: 1 root/time

Sealing form: radial seal

Pipe body requirements: Straightness: pipe body ≤2mm/m, pipe end ≤3mm (pipe end length 1 meter), full length ≤20mm; pipe end deburring;

Pressure test medium: emulsion/water (recycled use)

Flushing method: pre-filled water (low pressure pump, water storage tank and accessories)

Drive motor for flushing and active alignment roller: FA67-26.6-M2.2-H2

Driving motor for flushing active rotating roller table: XWD4-59-1.1

Flushing active rotating roller table lifting cylinder: Φ100/Φ70-100

Low-pressure water filling method: liquid filling tank filling

Equipment working mode selection:

It has three working modes: manual, semi-automatic and automatic.

Start stop and emergency stop control.

It has the functions of normal start and stop control and emergency stop control in emergency situations. After an emergency stop, the actuator will be powered off, and the PLC input and output instructions will not be powered, which is convenient for the inquiry and diagnosis of fault information.

• Flaw detection machine

This equipment is used to detect the surface and internal defects of the pipe body and welding to evaluate the quality of the product. It has high detection sensitivity, and can directly display the position, shape, size and severity of the defect, and the repeatability of the defect inspection is good.

• End Facing Machine

• Roller

Material: Cr12

Hardness of roller: HRC58-62

Deepness of quench hardening: ≥ 10mm

Roughness of surface: Ra≤0.8um

• 800KW High Frequency Welder

Design parameters of solid state high frequency welder

· Rated output power:800KW

· Rated DC voltage: UdN=250V

· Rated DC current:: 4000A

· Out frequency: f=150-230kHz

· Total efficiency: η＞85%

· Resonance form: Compound resonance

· Tank output form: No welding transformer output.

· Ripple Coefficient: ＜1%

· Welding mode: Induction welding

· Power distribution capacity: 1200KVA

· Input voltage: Three phase 380V/50Hz,3 phase 4 wire system

· Rated input current: I=1827A 1.2 Cooling system of cycling soft Water(Air-Water cooling system)

· Working water pressure(Mpa): 0.32Mpa

· Working flow(m3): 50-90m³

· Cooling capacity: 250KW

· Standard size(mm): 3500×1250×2650l

· Number of dragging devices:4 sets

The whole set of solid state HF welder comprise soft hefollowing seven parts: Rectifier cabinet, inverter cabinet, circulating soft water cooling system, step-down transformer, console, 3D adjustable bracket, and output leg.