WF60 ERW high frequency pipe making machine
Diameter of pipe: 25-80mm
wall thickness: 1.0-3.0mm
welding speed: 20-60M/min

Main Technical Parameters:

 WF60 ERW high frequency pipe making machine

1.1 Material of steel strip: Hot or cold-rolled low-carbon steel(ST-37), low alloy steel stripδb≤520Mpa,δs≤345Mpa

1.2 The width of steel strip: 60~240mm

1.3 The thickness of steel strip: 1.0-3.0mm

1.4 steel coil: I.D. : φ450~φ550mm

                       O.D.: φ800~φ1200mm

                         max weight :1500KG

1.5 The request of steel strip: As perYB189-64

    2.    The request of finished product:

2.1 Circular pipe

Diameter: φ25~φ80mm

Wall thickness: 1.0-3.0mm(square pipe: 1.0-2.5mm)

2.2 The precision of product: As per GB/T13973. 

2.3 The administer standard of product: GB/T3091-93,GB/T13973-92,ASTMA53

 2.4 Milling speed of machine unit: 20~60 m/min

    3.  high frequency power : 200KW 

Main components of welded pipe mill line

1.Product process flow:

  uncoiling → shearing and butt-welding → accumulator→ feeding and leveling→ mill-forming high-frequency welding → removing burrs outside of weld seam → cooling → sizing →straightening → fixed length cutting → run-out table

 2. Main components

2.1 Uncoiler:

Structure type: Double-side 360ºrotary manual expanding tight, which insure steel coil feeding alternatively and make steel strip go into accumulator freely.

2.2 Shearing and butt-welding machine:(Users Prepare it for themselves or Purchase from market)

Shearing and butt-welding machine, which insure two-coiled steel strips shearing tidily and then welding together and leveling weld seam.

2.3 Accumulator:

The steel strips stored in it shall be enough to ensure main machine to run continuously while welding two coiled strips.

(1). Structure: Plate part with automatic feeding and delivery system.

(2). Adjusting method: Manual spiral adjusting.

(3). Accumulating volume: 150-300m.

2.4 Forming, welding and sizing unit:

2.4.1 Feeding device:

Vertical guide roll: one pair of vertical guide roll at the import.

Roller for leveling: 7 Rollers for leveling which behind the guide roll are passively leveled for leveling strip steel to make steel strips go into forming device.

  2.4.2 Forming device:

   Mainly roughly mill-forming steel strip and controlling weld seam.

    The specification of forming device:

Stand of roller      quantity   Diameter of horizontal roll’s shaft     material

Horizontal roll stand    7               φ70 mm                 40Cr

1.The Structure of horizontal roll stand like dragon gate.

2.The Structure of Vertical roll stand is box-type. Two pair of vertical guide roll.

3.The manner of changing rollers: pulls at the side

2.4.3 welding device (mechanical part)

  Guide roll stand: one set (Be used for controlling direction of weld seam)

  Extruding roll stand for welding: two sets (Be used for controlling weld seam to realize successful welding.)

  diameter : φ50mm

  2.4.4 Cooling device: length: 2200mm

   2.4.5 Sizing device:

   The specification of sizing device:

 Stand of roller      quantity   Diameter of horizontal roll’s shaft     material

Horizontal roll stand    5            φ70mm                     40Cr

Vertical roll stand         5            φ40mm                     45#

The request of sizing device as the request of forming device.

2.4.6 Straightening machine:

Usage: It is mainly used for straightening of finished pipe roughly online.

2.5 computer -controlled cutting saw.

Structure: fixed length computer-controlled cutting

Method of Control: AC

The maximum running speed of the vehicle:  80 m/min

Cutting diameter: φ25~φ80mm

Cutting thickness: 0-3.0mm

max cutting speed: 15times/min

Fixed length: 5-8m

The specification of the saw blade: φ450*4

Cutting motor: 18.5KW 

(Equip with the computer-controlled tracking motor:11KW)

Pneumatic system: 0.4~0.7 Mpa