HGF300x12 DFT Pipe Mill Line

Hydraulic Double arbor Uncoiler with peeler & coil car

Double-cone hydraulic clamping with peeler. Peeler with pressure roller, driven by motor. Uncoiler cone can hold the strip coil in the function of oil cylinder. Then the pressure roller press down the steel coil, the cone rotate, the bucket swing & lift and snap the steel coil. When the strip heads rotate to the place of bucket, the bucket can shovel and level the strip heads.

Five-roll Leveler

There are a pair of pinch roller. Leveling rolls are arranged for two top and three below. Pinching is pressured by hydraulic cylinder, flatter roll motor is cogged by worm gear at reduced speed, the worm screws in front and rear can achieve synchronization in-phase by sleeve connection, which can ensure upper leveling roll and lower leveling roll be parallel, thereby achieve the purpose of levelling.

Hydraulic Shear & butt welding machine

It is used to parallel cut the trail of the strip, which has just gone into the accumulator, and the head of the strip coming out of uncoiler, and then weld them together.

Strip steel width: 400mm-1200mm

Strip steel thickness: 3-12mm

Semi-Automatic CO2 shieled welding

Working style: two tools (upper moving, lower fixed)

Spiral accumulator (O.D.: 12m)

Spiral accumulator is used to receive strip steel discontinuously from uncoiler and at the same time provide the steel strip to forming unit continuously.

The capability of reservation can be controlled by spiral parallel. The circumference difference of outer and inner parallel multiply by number of parallel is the capability of reservation.

There are guide roll supporting stand and torsion area in front of spiral accumulate. Steel strip will be turned from horizontal state to vertical state. Guide roll supporting stand is made up of carrier frame and holder and two pinch rolls, pinch rolls can alter strip steel from horizon state to vertical state. Pinch roll is driven by motor,  drive unit of accumulate is controlled by operating table.

forming and sizing mill

The forming section shapes the steel strip into steel pipes of the required cross-sectional dimensions via roll bending deformation. In the forming zone, the steel strip is roll-bent into a tube blank of the corresponding specification. Then, the high-frequency welding machine utilizes the skin effect and proximity effect of high-frequency current to heat the edges of the formed tube blank to the welding temperature (1130–1350 °C), followed by extrusion welding under the action of squeeze rolls to form a closed tube blank.

Solid State High Frequency Welder (GGP1000KW)

①Designed parameters

l   Nominal power: 1000kW

l   Rated DC power: Pd=1200kW

l   Rated DC voltage: UdN=450V

l   Rated DC current: IdN=2130A

l   The whole efficiency: η≥85%

l   Output power: Pout＞1000kW

l   Designed frequency: f=150~250kHz

l   MOSFET inverter: 120kW×10

l   Tank circuit output mode: no welding transformer output, secondary resonance

Rotary Milling Cutter

This mill is a high-tech project synchronized with the most advanced technology abroad. The cutter not only has high-speed sawing motion, but also can travel on the set trajectory according to the different cross-sectional shapes of the part being cut. The entire system is controlled by a computer and has AC and DC servo speed control systems. Adopt foreign advanced control unit. This makes the control precision high and the operation stable.

Structure type: Double saw blade, milling type

Control system: AC servo and Servo

Equipment composition: Basement, saw car, drive system, large disk rotation system, double saw blade sawing, feed system, clamp, roller device, speed measuring device, cooling system, hydraulic system, operating table, computer, speed control cabinet, photoelectric coding Device;

Runout Conveyor

Roller

Material:                     Cr12

Hardness of roller:            HRC58-62

Deepness of quench hardening: ≥ 10mm

Roughness of surface:        Ra≤0.8um