Delivery Time:100days

Brief introduction and quotation of

BG20 high precision machine unit for stainless steel welded pipe

Description of product

Summary:

This equipment is specially used for producingΦ8-Φ25.4mm, δ0.5-1.5mm stainless steel straight seam welded pipe. It made by refined materials in high precision and equipped with fixed length cutting saw. The main machine includs forming, welding ,sizing and straightening device. The composition of equipment is from uncoiler to fixed length-cutting saw. Rolling speed can be adjusted correspondingly within suitable range of pipe diameter and wall thickness.

 Applicable material: Material: SUS302 stainless steel strip The thickness of steel strip: 0.5-1.5mm (As per GB708-88) The width of steel strip: 25-80mm(±0.2mm) I.D. of steel coil: Φ450-Φ550mm O.D. of steel coil: Φ600-Φ1000mm Maximum weight coil: 500kgs Dimension range of processing steel pipe: O.D.: Φ8-Φ25.4mm Wall thickness: 0.5-1.5mm(Square and rectangle pipe≤1.0mm ) Length: 4-8m Product (steel pipe) process flow:

 Raw material (steel coil)→uncoiling→shearing and end welding→non-power leveling→forming and shaping→TIG welding→Polishing burrs outside of weld seam→cooling→sizing and shaping→roughly straightening→ fixed length cutting→finished pipe→run-out table

1.5 Milling speed: 0-8M/min

1.6 Product precision: maximum tolerance of diameter±0.05mm

1.7 Ar-arc welder: 400A

1.8 Advised user’s necessary accessories (only for reference):

Mechanical equipment site: 20m ×4m (length × width) Total electrical power: 25KW One set of air compressor(Prepared by customer, Purchase from market) Welding tool: tungsten bar, tungsten filament,Polishing wheel. Lifting equipment and tooling for installing machine, maximum weight of one part is 4 tons. Power and air supply. (380V/50HZ)

Introduction of main components:

Uncoiler:

Structure type: Double-side 360ºrotary manual expanding tight, which insure steel coil feeding alternatively and make steel strip going into accumulator freely.

Applicable range: 25-80mm steel strip width, 0.5-1.5mm thickness, Φ600-Φ1000mm steel coil O.D., Φ450-Φ550mm steel coil I.D., Max.500kgs steel coil weight.

 Shearing and butt-welding machine, which insure double steel coil shearing tidily and then welding together and leveling weld seam. Forming, welding and sizing unit:

Feeding & leveling device:

Form: Five rolls are passively leveled for straightening strip steel before it is fed into forming unit.

Forming device:

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

a. Horizontal roll stand: (Three fin pass)

Quantity: 8

Structure: 45#Cast steel, double housing, changing rolls in the side

Diameter of horizontal roll’s shaft: Φ36mm, material: 42CrMo

b. Vertical roll stand:

Quantity: 10(Including one guiding roll stand)

Type: Passive rotation

Diameter of vertical roll’s shaft: Φ20mm, material: 45# Forging steel

c. Adjusting method: Single spiral pole manual adjusting

d. One set of bed for installation

(3) Guiding extruding and welding scraping apparatus:

a.  One set of guide roll stand for controlling direction of pipe seam to insure pipe seam flatly and straightly entering into extruding rollers.

b.  Two sets of extruding roll stand for controlling weld seam to realize successful welding.

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

(4) Sizing device: Mainly fine shaping pipe after welding and controlling size accuracy. Each 5 sets of horizontal roll stand, vertical roll stand, three sets of gearbox branch (double connection), and 10 sets of universal shaft. (Structure same as forming device)

(5) Roughly straightening machine frame:

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

b.  Form: Turk’s head type, 4 rolls single-side   two sets

c. One installation bed along with sizing machine.

(6) Main driving system: The main unit is connected with main reducer by main motor and transmits power to gearbox branches, then gearbox branches drive upper and down shafts on horizontal roll frame.

a.  Master motor: Z4 series, DC 7.5KW,             one set

b.  Universal transmission shaft                     26 pcs

2.4 Pneumatic tracking cutting saw:

(1) Cutting method: Pneumatic tracking and automatic cutting

(2) Cutting thickness: δ0.5-1.5mm

(3) Cutting O.D.: Φ8-Φ25.4mm

(4) Cutting length: 4-8m

(5) Cutting motor: 3KW

(6) Cutting tolerance: ≤10mm

(7) Cutting motor: 3KW

(8) Controlling system: By encoder.

2.5Ar-arc welder: 400A(TIG system)

2.6Finished pipe passing conveyor:

Welded frame structure equipped with sizing signal sys