HGF125x6 DFT Pipe Mill Line
Product parameters
1. Strip steel coil
Material: HR coils
Strip steel thickness: 2~6mm
Strip steel width: 160～500 mm
Width tolerance ±0.5 mm
Inner Diameter: Φ610mm-Φ760mm
Outer Diameter: Φ1200mm~Φ2200mm
Max Weight: Max.15ton
2. Steel Pipe Specification
Square Pipe: 40x40mm-125mmx125mm
Rectangle Pipe: 40x60mm-100x150mm
Thickness: 2~6 mm
Length Scope of Pipe: 4~14m
3. Line speed: Max.60m/min
technical flow of production line
Coil car→ Uncoiler→ Coil Peeler & head straightener →Five roll Leveling→ shear and end welder→ Spiral accumulator → Forming → High-frequency induction welding→ Removing External burr→ Polishing Roller→ Water Cooling→ Sizing→ Cold Saw→ Rollout conveyor
Hydraulic Single-cone uncoiler with coil peeler and coil car
Single-cone hydraulic clamping with peeler. Peeler with pressure roller, driven by motor. Uncoiler cone head can hold the strip coil in the function of oil cylinder. Then the pressure roller down pressed steel coil, the cone head rotating, the bucket swing lifted and snapping the steel coil. When the head of the coil rotated to the place of bucket, the bucket can shovel and level the coil.
Five-roll Leveller
There is a pair of pinch roller. Leveling rolls are arranged for two top and three below. Pinching is pressured by hydraulic cylinder, leveling roll motor is cogged by worm gear by reduced speed, the worm screws in front and rear can achieve synchronization in-phase by sleeve, which can ensure upper leveling roll and lower leveling roll be parallel, thereby achieve the purpose of levelling.
Hydraulic Shear & butt welder
It is used to parallel cut the strip tail which has just entered the accumulator, and the strip head coming out of uncoiler, and then weld them together.
Spiral accumulator (O.D.: 6.5m)
Spiral accumulator is used to receive strip steel discontinuously from uncoiler and at the same time provide the steel strip to forming mill continuously.
Forming and sizing mill
The mill adopt the technology of direct forming to square, which has the advantages of stable forming, good quality of pipe surface and convenient changing product specifications. The forming mill is divided into two parts: Break down part and Fin pass. Compared with the technology of round to square, this process saves 30-70% of rolls, realizes the sharing of rolls and electric adjustment, saves the time of roll change and adjustment, improves the operation rate of the mill, and greatly reduces the equipment investment and spare parts reserve.
The mill consists of forming mill (break down part, fin pass), high frequency welder, cooling device, sizing mill and transmission device etc.
Solid State High Frequency Welder(GGP500KW)
①Designed parameters
l Nominal power: 500kW
l Rated DC power: Pd=500kW
l Rated DC voltage: UdN=450V
l Rated DC current: IdN=1330A
l The whole efficiency: η≥85%
l Output power: Pout＞500kW
l Designed frequency: f=200~300kHz
u MOSFET inverter: 120kW×5
Cooling system: Water-water cooling
Cold Saw
Main technical parameters:
Square pipe: 40x40~125x125
Rectangular pipe: 40x60~100x150
Steel pipe thickness: 2-6mm
Feed mode: Servo multi-speed feed
Max speed: 60 m/min
Run out table
Function: deliver the pipes after cutting and convey to oblique stand to ensure the delivering smoothly.
Mode: roller group consist of many single roller, rollers and rollers with motor cross layout. With pipe poker and pipe stopper.