High Frequency Welded Tube Mill

Process of High Frequency Welded Tube Mill

High‐frequency welded tube mill line is Designed to utilize roll forming process steel strip into various shapes. Using high frequency induction heating, this line is capable of producing section material of various diameters and sizes by squeezing weld seam together into closed shape. The application of advanced aperture technology, PLC automatic control system‐regulating unit ensure that the production line works reliably and operates and maintains easily.

Structure of the Whole Line

Double 5 tons Uncoiler
Double Arm Type
Load Capacity: 5 tons.
Strip Width: Maximum - 12” (305 mm)
4-Leaf Hydraulic Wedge Type Mandrel Expansion
Manual Mandrel Turning
Manual Base Rotation with Automatic Position Stop Mechanism
Coil Keepers: 4

Semi-Automatic Shear End Weld Unit

Portable, Push-Away Type
Max. Strip Width: 10” (250 mm)
Max. Strip Thickness: .140” (3.5 mm)
Hydraulic Clamps
Hydraulic Shear
Automatic TIG Weld

Horizontal Strip Accumulator

Disc Rotation (Turn Table) Type
Strip Width: 1.6” to 12” (40 mm to 305 mm)
Strip Thickness: .020” to .140” (.500 mm to 3.5 mm)
Strip Entry Guide Unit to Turn Strip from Flat to Straight Up
Driven Strip Pinch Roll with Pneumatic Roll Pinch
Disc-Rotation Looping Unit
Flexible Looping Type
Strip Storage Capacity: 500 m to 1000 m
Exit Strip Guide Unit to Turn Strip from Straight Up to Flat

Roll Forming Mill
5-Rollers Flattener
4 x Universal Driven Breakdowns with Single Point Adjustment
8 Side roll Stands
Shaft Size for Driven Stands - 65 mm
Shaft Size for Idle Side Roll Stands: 45 mm
Materials: Driven Stands- Cast Steel JIS S45C.
Gear Boxes Housing – Cast Steel JIS S45C
Shafts – 42 CrMo, Heat Treated
Spiral Umbrella Gears – DIN 20 MnCrTi4, Heat Treated
Motor Power for Forming Mill: 1x 75 KW VFD AC Motor
NEMA/IP 52 Compliance for Electrical Wiring, Connections and Cabinets
Weld Section
3-Way Adjustment Seam Guide Unit
2-Roll Type Weld Roll Box
200 KW Solid-State HF Welder
Tandem Scarfing Unit with Pneumatic Quick Lifting for Knife
Powered Bead Winder

Water Quenching Cooling Zone

Sizing Mill
4 x Universal Driven Sizing Passes with Single Point Adjustment
4 x Idle Side Roll Stands
3 x Turksheads
Shaft Size for Driven Stands - 65 mm
Shaft Size for Idle Sideroll – 45 mm
Materials: Driven Stands- Cast Steel JIS S45C.
Gear Boxes Housing – Cast Steel JIS S45C
Shafts – 42 CrMo. Heat Treated
Spiral Umbrella Gears – DIN 20 MnCrTi4, Heat Treated
Motor Power for Sizing Mill: 1x 75 Kw VFD AC Motor.
Electrical Wiring, Connections and Cabinets

Flying Cut-Off
Cold Saw Type
Computerized Length Control with Touch Screen HMI
Tube OD Range: Max. 3” (76.2 mm)
Tube Wall Thickness: Max. .140 (3.6 mm)
Tube Cut Length: 4 M – 10 M
Cut Tolerance: + 2 mm
Saw Blade OD: 600 mm
Saw Blade Cutting Traverse by Siemens Servo Motor
Saw Blade Cutting by Siemens Servo Motor
Pipe Clamps: Pneumatic
Cut-Off Carriage Traverse: Rack & Pinion with Siemens VFAC Motor

Run Out and Dump Table
Powered Roller Run-Out Conveyor with Dump Table
Manual Bundling Station

Working Process of High Frequency Welded Tube Mill
Coil loading — Uncoiling ‐ Strip joining — Accumulator — Forming ‐ H.F. Welding – Bead Remover ‐ Cooling — Sizing & Straightening ‐ Measuring Roll — Flying Saw Cutting — Run Out Conveyor


Warranty of High Frequency Welded Tube Mill
The whole equipment including all the components will be guaranteed within one year except improper use.

Applications of High Frequency Welded Tube Mill

• Mechanical Tubing
• Hollow Structural Section (HSS) or Structural Tubing
• Standard Pipe
• Energy Pipe
• Automotive Tubing
• Steel Conduit

Rishbin ERW Tube Mill lines are designed and manufactured according to heavy duty work conditions.

Rishbin HF/ERW Tube Mill lines are producing round, square and rectangular tubes between Ø13 mm up to Ø323 mm with different variations.

According to our customers requests, we are able to manufacture the groups of the lines seperately.

For your detailed requests please contact with us.