Square and rectangular pipe mill System 1

Square and rectangular pipe mill

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Loading Port:: China Main Port

Payment Terms:: TT OR LC

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Supply Capability:: -

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Specifications

HG168 pipe mill is used to produce round pipe 2" - 6" and square tube 50x50mm - 130x130mm.

HG168 Pipe mill, round , square/rectangular steel pipe mill line

I. Summary

The mill is intended for manufacturing round pipe of Φ60mm-Φ165mm with thickness of 2.0mm–6.0mm from cold-rolled and hot-rolled coil strip by means of unclosed tubular blank with its subsequent welding into tube, edge heating by means of solid state high-frequency welder, longitudinal seam welding in rolls of tube welding machine, cooling, further sizing or shaping and on-stream cutting of endless tube in measured lengths.

Finished product will be of round, square or rectangular pipe.

II. The technical flow of the production line

{SteelTape}→→ Double-head un-coiler →→Strip-head Cutter and welder→→

Cage Loop →→Forming section(Flattening unit +Main driving unit +Forming unit +Guide unit +High frequency induction welding unit +squeeze roller)+ De-burr frame →→Cooling unit →→ Sizing unit and straightener →→Flying saw under computer-control →→ Run-out table

III. Basic conditions:

a) Steel Pipe Specification

model	HG165
Round Pipe	Φ60 –Φ165mm
pipe thickness	2.0 – 6.0mm
Square & Rectangle Pipe	50X50mm –130X130mm
Pipe Length	6.0m – 12.0m
Length Tolerance	0-6mm

b) SteelTape Specification

1. Material: Carbon steel (δb≤500Mpa, δs≤235Mpa)

2. Steel Tape: Inner diameter: Φ600-Φ760mm

Outer diameter: Max.Φ1800mm

Strip steel width: 200mm-520mm

Strip steel thickness: 2.0mm-6.0mm

The maximum weight: 6.0 tons

c) Electric installed capacity: appro. 800KW

d) Size of the whole line: appro. 90X7.0m

e) Line Speed: 20-60m/min

Forming & sizing section

5.1 Forming mill gearbox, universal joint

5.1.1 Mill entry flattener by up-horizontal roll and below-horizontal roll, one positive five-roll flattener, one pair of feeding vertical roll.

5.1.2 Forming mill consists of:

- Driven stand: 7 sets (Horizontal)

- Driven stand shaft: Φ 120mm

- Material of shaft: 40Cr

- Side roll stand: 8 sets(Vertical)

- Side roll stand shaft: Φ75mm

- Material of shaft: 40Cr

- Gear box & universal joint: 7sets

- Material of gear box: cast steel

- Material of gear: 20CrMnTi

- Main motor: 110kW Model: Z4-250-11 2 sets

- Main redactor: 2 sets

- Horizontal roller frame with worm gear & shaft. adjust up and down at same time and level.

5.2 Sizing mill gear box, universal joint

5.2.1 Sizing mill consist of:

- Driven stand: 5 sets (Horizontal)

- Driven stand shaft: Φ 120mm

- Material of shaft: 40Cr

- Material of gear box: cast steel

- Material of gear: 20CrMnTi

- Main motor: 160kW Model: Z4-250-42 1 set

- Main redactor: 1 set

- 2 sets single head Turkshead, with 4 rollers*2sets

- One speed testing roller with air cylinder for CNC flying saw

- Horizontal roller frame with worm gear & shaft. adjust up and down at same time and level.

Q: A roll forming machine, rolling out of the length is always not up to a fixed size, not too small, that is, more than that, what is the cause?: Maybe there is something wrong with that roller. It rolls out of the wrong angle and the size will be out of order.

Q: What is rolling forming processing?: Ironing the surface of the workpiece with a raised micro wave crest to fill the concave micro troughs, thus changing the distribution of the peaks on the surface, and obtaining smaller surface roughness values.

Q: Improvement in rolling forming process: The rolling will produce a hardening layer on the surface of the workpiece. This layer has obvious delamination phenomenon with the internal material, which is easy to cause the surface layer to fall off;

Q: Introduction of roll forming process: With the progress of technology and the development of production, more and more attention has been paid to the roll forming process.

Q: What kind of material and what heat treatment are used for pressing roller (molding, feeding, cutting force, heavy load, heavy load) of sheet steel rolling machine?: Generally speaking, to consider the use of rollers in the requirements, including: 1., good wear resistance, 2. toughness, 3., high hardness, 4. hardened layer (easy to wear after repeated repair)

Q: What is the surface rolling forming machine process?: The rolling process using metal at room temperature, cold plastic characteristic, through the rolling tool is the rolling tool to put some pressure on the metal surface, so that the workpiece surface by plastic deformation, the height to the lower tissue slip, the surface roughness decreased.

Q: Process mould for rolling forming process: Rolling forming is more complicated and requires higher than rolling thread. The die design is based on the different shapes of the workpiece, the design of the rolling plate into a cross section or a few sections, can use synchronous type; also can use grading type.

Q: Material and equipment for roll forming process: Rolling process is a cold forging process, which can be used for rolling and forming a lot of materials. Among them, low carbon steel is a material commonly used in rolling forming, and non-ferrous metal is more suitable for roll forming.

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