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welding steel pipe machine ZG76, 8-250mm steel strip width,, 1.2-4.0mm thickness,, 800-1200mm steel coil O.D. - details see: https://www.machineto.com/zg76-welded-steel-pipe-production-line-or-welding-steel-pipe-machine-10081746

ZG76 welded steel pipe production line or welding steel pipe machine

1. Uncoiler

Structure type:Double-side 360ºrotaryhydraulic-pressureexpanding tight, which insure steel coil feeding alternatively and make steel strip go into accumulator freely.

Applicable range:78-250mm steel strip width, 1.2-4.0mm thickness, Φ800-Φ1200mm steel coil O.D., Φ450-Φ550mm steel coil I.D., Max.2500kgs steel coil weight.

2. Shearing and butt-welding machine

It ensures two-coiled steel strips shearing tidily and then welding together and leveling weld seam.

3.Horizontal-type accumulator

The steel strips stored in it shall be enough to ensure main machine to run continuously while welding two coiled strips.

4 Forming, welding and sizing unit

(1)Feeding & leveling device

(2)Forming device

Mainly roughly mill-forming steel strip and controlling weld seam.

A. Horizontal roll stand:

(a)Quantity: 7

(b)Structure: Cast steel, double housing, changing rolls in the side

(c)Diameter of horizontal roll’s shaft:Φ75mm, material: 40Cr

B. Vertical roll stand:

(a)Quantity: 9

(b)Type: Passive rotation

(c)Diameter of vertical roll’s shaft:Φ45mm, material: 45# steel

C. Drive gearbox branch:

(a)Quantity: 7

(b)Structure: Spiral bevel gear, cylindrical gear

(c)Material: casing: QT50, gear: 20CrMnTi and 40Cr, input and output shaft: 40Cr

(d) Drive transmission: 14 sets of Jeep Auto universal transmission shaft

D. Two sets of bed for installation

(3) Guiding, extruding and welding, scraping device

(a). One set of guide roll stand for controlling direction of weld seam to make pipe seam flatly and straightly go into extruding rolls.

(b). One set of extruding roll stand for controlling weld seam to realize successful welding.

(c). Two sets of scraper frame for scraping outside weld seam

(d). One set of bed for installation

(4) One set of water cooling tank

(5) Sizing device

(a). Mainly fine shaping pipe after welding and controlling size accuracy. Each 5 sets of horizontal roll stand, vertical roll stand and drive gearbox branch, 10 sets of universal shaft (structure same as forming device)

(b). Roughly straightening machine:

l Usage: It is mainly used for straightening of finished pipe roughly online.

l Type: Turk’s head type, 4 rolls two sets

l Two sets of installation bed.

(6)Main driving system

The main unit is connected with main reduce by major motor and transmits power to gearbox branches, then gearbox branches drive upper and down shafts on horizontal roll frame.

a. Major motor: Z4 series, 90KW two sets

b. Main reducer: ZLY224 (outside four shaft-ends) two sets

5 Computer-controlled tracking cutting saw

(1)Cutting method: Computer-controlled tracking and automatic cutting

(2)Cutting thickness: δ1.2-4.0mm

(3)Cutting O.D.: Φ25-Φ80mm

(4)Cutting length: 4-8M

(5)Cutting tolerance: ±3mm

(6)Cutting motor: 22KW, second-class AC motor

6. Finished pipe passing conveyor: (Run-out table)

Welded frame structure equipped with sizing signal system

7Solid-stateHigh-frequency electric:

300KW

Applicable power supply 380V/220V 50HZ

8. Grinding wheel for higher requirement flatness

9. Arc Zinc spraying machine

(1) Overview

The product is matched special equipment for welded pipe production enterprise. It has many advantages, such as rapid Zinc supplementation, high working efficiency, low energy consumption, long work time and can be suitable for kinds of environment and so on. At the same time, it solves the problems of Zinc supplementation for thick wall welding tubes, square tubes, industry type welding which the other similar products can not solve. It is the domestic only professional zinc spraying welded pipe special equipment.

(2)Arc spraying principle

Principle:Two sprayed Zinc wires do self-consumption electrode, and then arc which burns on the end of the wire material melts the wire which is sent into equably. Then through the compressed air, atomize the melting wire material to small particles that uniformly distribute and gush to workpiece stroke coating. When spraying, it needs to intersect a certain angle (usually 30-60°). Continuous sent two zinc wire respectively connects the positive and negative of the power. The end of the wire contacts the striking of arc, under the action of the power supply, Arc keep stable combustion, and at the back of the Arc occurrence point, let the melting wire atomize to particles through high-speed compressed air, and then spray into the base material surface which is after pretreatment, finally form the coating.

(3) Feathers

Spraying efficiency is high,operation is easy and safe

Bond strength of the coating and base material is high.

Deposition rate is high,spray deposition rates is more than 78%

Wire feed rate is accordant and stable, than can ensure fast, reliable of the striking of arc.

The machine can work continuously and stably for long time.

The equipments is specially suitable for machine unit for high-frequency straight seam welded pipe to spray for the welding line

(4) Operation

Before the spraying job, the users must thorough reading the whole equipment specifications, and clear up the construction site and then reasonably decorate good equipment position, pay attention to take shelter from rain and proof dust.

10. Moulds

Type	Mould size	Estimated weight
Square tubes	25.4x 25.4 mm	750kg
	31.8x 31.8 mm	1050kg
	38.1 x 38.1 mm	1200kg
	50.8 x 50.8 mm	1350kg
Rectangular tubes	25.4 x 50.8 mm	600kg(half a set,can share forming part with 38.1x38.1mm)
	38.1 x 50.8 mm	1300kg
Round tubes	25.4 mm	700kg
	38.1 mm	1050kg
	50.8 mm	1200kg