Longitudinal Seam Welding Machine for Thin Wall Tank Welding
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Longitudinal Seam Welding Machine for Thin Wall Tank Welding

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Longitudinal Seam Welding machine is for thin plate butt welding, and or thin wall pipe longitudinal seam welding. It is widely used in all sites involving longitudinal welding, like thin wall pressure vessel, auto parts, household electric appliances, medical apparatus and instruments, food machinery, architectural decoration, etc.

 

  1. Technical Specialties of Thin Wall Pipe Longitudinal Welding machine:

    1)       The equipment performs automatic sheet butt welding and or thin pipe longitudinal seam welding in high efficiency, high quality, without deformation;

    2)       The welding modes adopted with the machine include TIG/ MIG/ MAG/ CO2 Gas Shielding/ Plasma Welding/ SAW (Submerged Arc Welding), meeting various demand from customers;

    3)       The workpieces that can be welded with this longitudinal seam welding equipment includes (but not limited to) thin plate (sheet), thin wall pipe/ tank/ tube, conical cylinder, one-side-opened box, etc.;

    4)       Materials of workpiece that can be welded with this longitudinal seam welding machine includes carbon steel, stainless steel, alloy steel, Al, etc.

 

    2. Structure and Performance of Thin Wall Tank Longitudinal Seam Welding machine:

    1)       Please check attached picture. The machine is of stationary overhanging structure, and composed of machine frame, overhanging beam, welding torch carriage, mandrel and its locking unit (For fixing workpiece during the thin pipe longitudinal welding), welding system and control system;

   2)       Tightening of the workpiece in this longitudinal seam welding machine is in the manner of pneumatic key type gasbag: With gas inflated into gasbag, the two arrays of keys generate pressure and press workpiece tightly. Pressure of the gasbag is adjustable in the range of 0~7kg/cm2; Span of the two arrays of keys can be adjusted within 5~ 20mm. In this way, this sheet butt welding machine adapts to workpieces of varying specifications;

   3)       The two arrays of keys are deployed closely along both sides of welding seam, making complete and uniform pressing of the workpiece in the process of both thin plate butt welding, and thin wall pipe longitudinal seam welding. The keys are controlled with foot pedal switch, which can exert pressure on workpiece separately;

   4)       Mandrel and its locking unit are for holding workpiece tightly during work. It is made of high quality steel by means of precise machining and heat treatment, making its sufficient strength; During thin wall tank longitudinal seam welding, there is circulating water for cooling inside mandrel, for the purpose of guaranteeing stability of welding operation, and getting the least degree of workpiece deform; There is concave slot at the top of the mandrel, (Gas protecting unit is beneath the concave slot), for fitting up cushions; Besides, the mandrel also has welding seam forming slot, which helps formation of welding seam for thin wall pipe longitudinal welding and thin plate butt welding;

   5)   Alignment of workpiece: It is simple and easy way, of inserting pin style. For starting work, just insert these pins into its slot, and have seam of workpiece right at the position of this slot, then press down keys. The workpiece is positioned and pressed tightly in correct way.  

 

    3. Parameters of Thin Wall Tube Longitudinal Welding machine:

Model

LW1000

LW1500

LW2000

LW2500

LW3000

Max. Cylinder Length (mm)

1000

1500

2000

2500

3000

Cylinder Diameter (mm)

ø180~800

ø 200~1000

ø 260~1000

ø 300~1000

ø 400~1200

Wall Thickness (mm)

0.3~5

0.4~6

0.5~6

Welding Speed(mm/min.)

150 ~1500(VFD)

Positioning Precision   (mm/m)

±0.2

Max. Welding Current (A)

300

Purpose

Thin plate butt welding, thin wall pipe Longitudinal Seam   welding

Material

Carbon steel,   Stainless steel, Alloy steel, Al,

Welding mode

TIG/ MIG/ MAG/   CO2 Gas Shielding/ Plasma Welding/ SAW

 


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