I. Introduction

HG219high-frequency pipe mill line, main using to process Electric Welding Pipe, the Pipe Diameter is Φ88.9-Φ219.1mm and the Pipe Thickness is 1.5-6.35mm of the electric welding pipe, and it is also process correspondence different shape pipe. This Pipe mill Line has been achieved auto processing basic so as to save on a lot of workers, and it has imitated design to the Japan’s Pipe Mill Line what is Changchun/China manufacture imported from Japan. Regards to accurate made for this Pipe Mill Line, it is not only the best quality to 168 type High-frequency Pipe Mill Line, but also it’s figure.

II. The basic processing terms

(1)Strip Steel

It must be require abide by YB189-64 standard.

(2)low carbon steel, low alloy steel;δb≤520Mpa； δs≤340Mpa

(3) Trip coil

Inner diameter Φ500-Φ600mm

Out diameter Φ1000-Φ2000mm

Coil weight ≤12000Kg

(4)The machinery & electronics:about 1000KW.

High-frequency Welder:500KW

(5)Pressure air capability:6m³/m,0.4-0.6Mpa

(6)Work shop and electric power:

It must be higher than 6M to work shop of the assembling the high-frequency pipe mill line i.e. the distance is from ground to the sky transfer machine, the workshop span is 18 M, length 120 M, collocate tow sets Sky-transfer-machine including 15 ton and 10ton.

III. Working Process:

strip steel to coil→uncoiler →end straightener→flattener→shear welder→storage material unit →formed,welding,cooling,accurate pipe Dia. size →accurate pipe length size,cutting→inspection →package .

IV．Processing capability of the equipment:

Round: Φ88.9-219.1mm；

Square: 70*70-170*170mm

Rectanguler: 100*50-200*150mm

Thickness: 1.5-6.35mm

Max. Production Speed: Max.55m/min

V. The main parameters of pipe mill line unit:

Coil car

Coil car is main including hydraulic cylinder, electric motor, reduce speed river frame unit, the frame of uping coil machine unit level moveing, uping coiling machine move by electric reduce speed motor or reduce gear unit, the uping coil machine unit up by hydraulic cylinder, the hydraulic oil pressure is 7 Mpa, and the rote of the hydraulic cylinder is 400 mm, and hydraulic cylinder’s moving should be controlled by electricity route key.

Uncoiler

The uncoiler is of the structure of single mandrel. It contains two main parts: main body and the fixed base. The main body is equipped with pneumatic system to satisfy the needs of expanding, contracting and braking of the mandrels.

Straightener unit:

This unit is main used to lead the new coil steel head feed into the flattener unit after uncoiler unit bring the coil into the working place.

Electric motor power:3KW

Processing pressure:7Mpa

Reduce speed :BW17-2

Flattener unit

This unit is main used to flatten the head and trail of the strip steel and prepare for the next step cutting and shear welding so as to ensure the strip steel opposed flate and straight in the shear welding.

Flattener level and pressing capability:

The style of the adjust velocity:No grade of the adjust velocity

The structure style:Pressing & carry,Five roll flattener unit

Up & down style:Hydraulic system

Width of the flattener:270-700mm

Flattener thickness :1.5-6.35mm

Hydraulic cylinder working pressure:7Mpa

Electric motor power:15KW

Butt Shear & Welder

The shear welder is a important unit to the pipe mill line equipment, and main used to cut the no-normal strip steel head or trial, and then connecting the last strip steel trial with the next strip head so as to ensure the processing continue.

Power:Hydraulic power

Cutting thickness:1.5-6.35mm

Width:270-700mm

The hydraulic oil pressure of working:7Mpa

Hydraulic cylinder working pressure for cutting:14Mpa

Horizontal Spiral Accumulator 6M

This unit is main include in press& carry material device, accumulator assemble, carry off material unit, electric control unit.

• Press & carry material device:

It is main include frame, electric motor, brake unit, circling direction transfer power axle of the reduce velocity, press & carry roll, pressure air system of guide roll, inspected velocity unit; it can supply the strip steel to accumulator and the mean times it will transfer the carry velocity information to electric control system, when we demand stop carry the material to this unit, it will stop roll to the electric motor and press& carry material roll by the break, and also could adjust the velocity to carry electric motor and the unit carry material velocity.

1. Accumulator frame assemble:

Include the electric motor, frame , inner circle roll, out circle roll and pressure roll. It can be used to storage the strip steel material from press& carry unit and it could be draw from the center send-off material roll.

1. Send-off material device:

Include frame, guide direction rolls, guide out roll of high or lower place. It can carry the strip steel to shape system and send the carry out material velocity information to electric control device.

(4)Technical parameters:

Steel coil thickness:1.5-6.35mm

Width:270-700mm

The outer diameter:8000mm

Carry material going velocity:Vmax=100m/min

Directly electric motor power of the press & carry: motor 45KW

the electric motor of the accumulator frame : motor 75KW

Forming & Sizing

The forming & sizing unit is the vital equipment to the pipe mill line. This unit abide by the roll frame theory. It could continue process some specification steel tube by no-contact welding, that is carrying some strip steel to this unit and let it passing the frame roll to frame tube raw, and then take the electric fluid together on the tube welding surface so as to treat the tube temperature higher to suit welding by the pressing roll welding, and then after cooling, forming sizing and flattener to product what is your demand tube.

Milling Saw

Cold cutting saw is an emerging online cutting technology in the welded pipe industry. The main feature is that it adopts the principle of cold milling. After cutting, the pipe end is flat and free of burrs. There is no need for secondary cutting for applications with high processing requirements. In addition, due to the adopted servo follow-up fixed-length tracking technology, the cutting length accuracy is higher than that of ordinary computer flying saws. In the production process, dust and noise pollution are significantly reduced.

The whole system adopts Siemens full digital motion control system Simotion and Profinet network combination, servo motor all through the network control, through 10 "touch screen input system parameters, system operating parameters are clear and accurate, and real-time record system alarm information. The base steel plate of the saw is welded and processed after tempering. The moving parts are all driven by linear linear guide rail and ball screw. It has its own lubrication system. The whole flying saw machine is stable and reliable, and the electric control system is advanced.

Unit forming method: bottom line forming/center forming

Maximum linear speed: 55 m/min.

Cutting length range: 4 ~ 12meters

Cutting length accuracy: ±1.5mm (Line speed fluctuation does not exceed 2%)

Main controller: Siemens Simotion D435-2

Control network: ProfiNet

Expansion I/O: ET-200SP

600KW High Frequency Welder

Nominal power: 600kW

The automatic steel pipe packing and palletizing machine

The automatic steel pipe packing and palletizing machine is used to automatically complete the collection and stacking of welded pipe at the end of the welding pipe production line, to run smoothly automatically, to reduce the labor intensity, to improve the automation degree of the production line, and to effectively improve the production efficiency. At the same time, it can reduce the impact noise, remove the bumping injury, improve the product quality, reduce the production cost, and eliminate the hidden danger of safety.

Roller

Material: Cr12

Hardness of roller: HRC58-62

Deepness of quench hardening:≥ 10mm

Roughness of surface: Ra≤0.8um