High Precision Straight Seam Carbon Steel Pipe Tube Making Machine Welded Mill Production Line

Working Process Flow of Pipe Welding Machine

Raw material steel strip→Feeding→Uncoiler→Leveling→Shearing and butt-welding→Cage accumulator→Forming machine→HF welding→De-burr→Water cooling→Sizing→Cutting to length→Roller table→Final inspection→Storage

Main specification of the production line

1. Products to produce

1.1 Round pipe:φ48-φ127mm

Thickness:1.5-4.0mm

Length:6-12mm

2. Specification

2.1, Mill product speed:≤80m/min

2.2, Raw strip steel:

Raw material is low carbon steel and low alloy steel of hot rolled coil and cold rolled coil.

2.3, Size of Raw material

Thickness:1.5-4.0mm

Width of steel strips:190-400mm

Coil OD:800-1500mm

Coil ID:450-550mm

Coil weight:7t

2.4, Raw material steel strip material demand:δb≤560Mpa, δs≤340Mpa.

2.5, Raw material standard

Raw material quality standard:As per BS or EN

General Technical Specification

1. Raw material requirements
Material: Hot rolling or cold rolling steel
Tensile strength: σb≤600Mpa
Yield point: σs≤315MPa
Coil width: 60~240mm
Coil outer diameter: Max. Φ1600mm
Coil inner diameter: Φ508mm
Coil weight: Max.2.0T
Material thickness: 1.0~2.5mm for Round pipes / ≤2.0mm for Square & rectangle pipes

2. Output product scope
Pipe type: Straight seam high frequency welded pipes
Pipe purpose: Electric heating tube, fridge pipe, Auto car pipe, sporting facility tube, furniture pipe, cooler pipe, pressure feeding pipe, construction pipe, configuration pipe.
Round pipe size: Φ20mm~Φ76mm * 1.0mm~2.5mm
Square pipe size: 15×15mm~60×60mm * 1.0mm~2.0mm
Rectangle pipe size: 30×20mm~80×40mm * 1.0mm~2.0mm (a:b≤2:1)
Producing length: 4~10m (can be designed by customer request)
Cutting length precision: ±3mm (by hot flying computer saw)

3. Line capability
Line direction: Pending and will be decided by Buyer
Producing speed: 30~80m/min

4. Scope of supply

4.1. Technology process
Uncoiling→ Accumulating→ Leveling→ Forming→ HF welding→ Deburring (outer) → Cooling→ Sizing→ Straightening→ Cutting→ Discharging

4.2. Parts of Line
Double heads Decoiler--------------------------------1 set
Shear & butt welding device-------------------------1 set
Horizontal accumulator--------------------------------1 set
Forming & Sizing unit----------------------------------1 set
Hot flying computer saw----------------------------------------1 set
Run out table (single side discharging)-----------1 set
Control system------------------------------------------1 set
Roller------------------------------------------------------Optional / prepared by Buyer
Pneumatic system--------------------------------------Prepared by Buyer

Main Technical Performance

Process of High Frequency Pipe Welding Machine

{Steel strips} →→Auto Double-head un-coiler →→Strip-head Shearer & Auto TIG butt welder station →→Horizontal spiral accumulator group →→Forming M/C (Main driving unit + Flattening Entry unit + Breakdown section + Fin pass section + Sea m guide unit + High frequency induction welding system + Squeeze welding roller unit + Outside scarfing unit + Horizontal ironing stand) →→ Emulsion water Cooling section →→ Sizing M/C (Main driving unit + Sizing section + Speed testing unit + Turk straightener + Vertical pull-out stand) →→ NC flying saw under computer control →→ Run-out table

Main structure

1. Double heads Decoiler (Manual type)

Configuration: Two drums expanding by hand

Coil inner dia.: Φ508mm

Coil outer dia.: ≤Φ1600mm

Material width: 60~240mm

Coil weight: ≤2.0T

Braking type: Two phase braking by pneumatic

Drums exchanging: 180° turning by hand

2. Automatic shearing & butt welding (Pneumatic shear)

2.1. Shearing method:

Type: Pneumatic shearing

Pneumatic system: 0.4~0.7Mpa

Adjustable range: Φ120

Cutter blade: 1 pair

Material of blade: Cr12 (HRC58~62)Strip width: 60~200mm

thickness: 0.8~3.0mm

2.2. Automatic Argon Arc welding

Type: PLC control, Frequency controlled TIG automatic welding

Welder: TIG

Welder current: 22~315A

Protection gas: Argon whose purity over 99.99%

Welding gun: 1 set

Clamping: Pneumatic

Welding time: 75~350mm/min

2.3. Outer size: 1100 x 1100 x 1650mm

3. Horizontal accumulator

Accumulator: introduce peripherally and feeding from center

Out diameter: 4.5m

Width of metal strip: 60~240mm

Thinness of metal strip: 1.0~2.5mm

Feeding speed: ≥150m/min

Configuration: Turning frame, Pinch machine (11kw AC motor), Main body (15kw AC motor)

Feeding control: Feeding is manual control which same as Uncoiler; Discharge is non-power style.

4. Forming & Sizing unit

Forming & Sizing

Parts of Forming & Sizing:

Driving system-------------------------------------1 set

Second grade transmission---------------------13sets

Feeding & Leveling device----------------------1 set

Horizontal roll frame------------------------------13sets

Vertical roll frame----------------------------------13sets

Driving system

Forming & Sizing driving system: 1 sets

Motor type: Z4-200-31 132Kw/1500rpm

Reducer type: ZLY hard gear reducer

Motor driving system: Control by DC digital converter

Second grade transmission

Transmission type: Gear box and gimbaled joint

Gearbox configuration: Spiral bevel gear & cylindrical helical gear

Lubricating: Gear oil soaking

Oil level display: Inspection glass on box

Horizontal roll frame & Vertical roll frame

Forming height: Φ140mm

Adjusting of Horizontal roller: Manual (or manual sync adjustment)

Adjusting of Vertical roller: Manual sync screw adjusting

Welding

Parts of Welding:

Guiding frame------------------------------------------1 set

Welding pinch frame----------------------------------1 set

HF welder------------------------1 set (or prepared by Buyer)

Deburring cutter (Pneumatic) ----------------------1 set

Welding pinch frame

Type: 3 rollers pinch

Shaft diameter: Φ40mm

Material of shaft: 40Cr (HF quenching)

Adjusting: Manual screw adjusting

Deburring cutter

Type: Two cutters setting

Feed/retract: Pneumatic adjusting

Cutter adjustment: Manual screw adjusting

High frequency welder:

Type: High frequency influence welding

Size: GGP-200-0.4-HC

Power: 200Kw

Cooling

Cooling way: Spray and soaking

Length of cooling: 3500mm

Speed supervising device

Type: Two roller type with pneumatic clamping

Quantity: 1 set

Outer dia. of roller: Φ111.4mm

Foundation and advised Buyer’s necessary

Site area of machine (length X Width): 55m × 7m
Site area of cabinets (length X Width): 6m × 3m
Machine foundation base: See foundation drawing CAD
Overhead crane: 2 sets of ≥5 Ton overhead crane
Magnetic bar (impeder core): prepared by Buyer
Saw blade: Prepared by Buyer
Lubricating oil grease, cooling emulsion and etc will be prepared by Buyer
One set of Emulsion water cooling pool (Volume 30 m­3*1pools)for pipe-welding mill and plate exchanger of HF-welder, with two sets of pumps(AC4Kw,lift≥30m­ & flux≥30m­3/hour),water pressure meter,valves,and water pipes will be prepared by Buyer. Or use one set of glass fiber cooling tower for Emulsion water cooling pool and plate exchanger of HF-welder.
Adopting ground or attic frame and room of high-frequency welder for machine unit, stack basket for welded pipe, made by buyer.
The cables which from power station to pipe mill line, and cables & wires between machines and cabinets, all of them will be prepared by Buyer.
One set of ≥1m­3 /min air compressor and one set ≥0.50m­3 air tank, 0.7~1.0Mpa. Whole of the pneumatic supply system will be prepared by Buyer.
Lifts,tools,anchor bolts,expand bolts,embedded and fixing materials for installing machine will be prepared by Buyer.
Power supply:
High frequency welder power: GP-200Kw
Power of supply: 3P/4W/380V/50Hz
Total power of Line: 450Kw