HG32 High Frequency Pipe Production Line
1. General description:
HG32 high frequency welded pipe production line is used to produce both welded pipes of OD10mm-38mm in diameter and 0.5-2.2mm in wall thickness. Square and rectangle pipes and deformed pipes of the corresponding size are available too. This equipment uses roll pass design, having features of good quality matching and high precision assembling.

2. Main specifications:
2.1. raw material coils:
material of coils: low carbon steel, low alloy constructional steel: 
width range of steel strips: 30-120mm
thickness of steel strips: 0.5-2.2mm for round pipes; 0.6-1.8mm for square/rectangle pipes;
coil inner diameter: 508mm
coil outer diameter: max 1500mm
coil weight: max 1.5 tons.

2.2. finished pipes specifications:
round pipe size: 10-38mm, 0.5-2.2mm
square pipe size: 10x10-30x30, 0.6-1.8mm
rectangle pipe size: 7x14-20x40, 0.6-1.8mm 
cutting length: 4-9m, adjustable
forming speed: max 100m/min.

3. working processes:
double heads uncoiler---shearing, butt welding---cage accumulator---forming---H.F. welding---Removing external burr---cooling---sizing---rough straightening---fixed length cutting---run-out roll table---checking, collecting---packing---storage.
3.1. double heads uncoiler
Structure: double arms, mechanical type, two arms can horizontal rotate 180, manual expansion.
Main parameters:
inner diameter of the strip steel: 508mm
outer diameter of the strip steel: max 1500mm
strip steel width:  30-120mm
strip steel thickness: 0.5-2.2mm
strip steel width: max 1.5 tons

3.2. shearing and butt welding device
Horizontal cut the steel strip tails, most of which has just gone into the accumulator, and cut the strip heads, which is coming out of the uncoiler, and then weld them together.

3.3. cage accumulator
working style: outside entrance and inside exit
material width: 30-120mm
material thickness: 0.5-2.2mm
feeding speed: 160m/min
size: 5.0mx2.4m
feeding motor: 2.2kw


3.4. Forming and sizing mill
It's the core process of the welded pipe production line. Through forming, squeezing, welding, cooling, sizing and rough straightening, it can produce both round and square and rectangle pipes of specific size.
Parts of forming and sizing
Driving system:
Forming and sizing driving system: 1 set
Motor type: Z4-110-31 110KW,1500rpm
Reducer type: ZLY hard gear reducer
Motor driving system: control by DC digital converter

Second grade transmission:
Transmission type: gear box and universal joint;
gearbox configuration: spiral bevel gear, and cylindrical helical gear
lubricating way: gear oil soaking
oil level display: inspection glass on gearbox.

Horizontal and vertical roll frame:
forming height: 120mm
Adjusting of horizontal roller: manual (manual sync screw adjusting)
Adjusting of vertical roller: manual sync screw adjusting

Name	Section	Quantity	Shaft diameter	Material	Treatment
Horizontal	Forming unit	8	55mm	42CrMo	HF quenching
roll frame	Sizing unit	5	55mm	42CrMo	HF quenching

Name	Section	Quantity	Shaft diameter	Material	Treatment
Vertical	Forming unit	8	45mm	40Cr	HF quenching
roll frame	Sizing unit	5	45mm	40Cr	HF quenching

3.5. Parts of welding:
Welding pinch frame:
Type: 2 rollers pinch
Shaft diameter: 45mm
Material of shaft: 40Cr (HF quenching)
Adjusting method: manual screw adjusting.

Deburring cutter:
Type: two cutters setting
Feed and retract: pneumatic adjusting
Cutter adjustment: manual screw adjusting