Special Design Pipe Flange External Internal Circumferential Seam Welding Machine

A. Application and Characteristic of Pipe Flange Circumferential Welding Machine:

1. Where Used: Pipe flange is widely used in many industries, such as Industrial Pipeline, Oil and Gas Pipeline, Petrochemical, etc. In the process of manufacture, circumferential welding of internal and external are indispensable steps;

2. Function: The varied designed Circumferential Seam Welder machine or equipment fulfils this task. As a branch of Special Design Welding Machine, these machine tools are specifically designed and produced for different applicating scenarios;

3. Characteristic: These machines feature in different personalized mechanical structure, way of welding torch arrangement, to best fitting on customer demand;

4. In this product, we introduce 3 different models of special design machine on circumferential welding.

B. Pipe Flange Circumferential Seam Welding Machine:

The machine fabricates on a small pipe flange with external circumferential welding: (Fig.1)

1. Technical Features of Circumferential Seam Pipe Flange Welding Machine:

1)  Configuration: This machine is equipped with two sets of welding torch, which are installed on the same carriage, for welding both internal and external flange seams at the same time. This is designed on the basis of fully considering pipe flange specialty and its welding request;

2) Welding mode is gas shielded CO₂, and or MIG, performed in the position of fillet welding;

3) Operating Mode: The two sets of torches fabricate on pipe flange in stationary status: With revolve of pipe flange, its internal and external seams got welded; So, pipe flange rotation speed is also welding speed;

4) Adjustment: Position and angle of the two welding torches need to be manually adjusted before welding;

2. Structure of Pipe Flange Circumferential Seam Welder Machine:

1) This machine has the structure of horizontal lying base. Two sets of welding rollers beds serve as supporting unit of the workpiece, which can move along the machine bed guided with linear guideways, for adjusting on its span based on different lengths of workpiece;

2) The welding arm which is fit with welding carriage, is fixed at the opposing terminal of the machine. Welding carriage on its top section can extend forward in the process of welding, and retreat backward when the workpiece is loaded and or unloaded, leaving more space for operation. There is sliding unit inside the welding carriage for its quick horizontal movement;

3) Welding carriage moves up and down on the welding arm, catering for various diameter of the workpiece welded in this Circumferential Welding Machine;

4) Pipe Flange Fixture: This machine is also equipped with pneumatic jacking unit, for quick and convenient load and unload of workpiece.

3. Technical Parameters of Pipe Flange Circumferential Seam Welding Machine:

C. Tailor made Small Pipe Flange Circumferential Seam Welder Machine:

1. Usage of Small Flange Circumferential Special Design Welding Machine:

The machine performs circumferential welding on small flange: (Fig.2)

1) Function: This machine is for welding small flanges, structure members, and or small pipes with relative short length;

2) Flange is a kind of basic connecting element in all aspects of manufacturing industries. Hence, its Circumferential Welding Machine is also widely used in every corner of facilities;

3) Besides flange, this machine can also be used for welding structure member and small pipe. So, it is a flexible welding equipment;

2. Technical Specialty of Small Flange Circumferential Seam Welding Machine:

1) Dimension: This special design welding equipment has short and compact dimension, determined on characteristic of its workpiece;

2) Operating Way: This machine also welds workpiece in stationary position, together with workpiece revolve. Which means, position and angle of its welding torch should be modulated ahead of time;

3) 2 Degrees of Freedom of Small Flange: Besides revolve, the workpiece can also be tilted within the range of 0°~ 45°. This gives more flexibility in its welding process;

4) Welding Mode: Gas shielded CO₂ and MIG;

3. Structure and Performance of Pipe Flange Circumferential Welding Machine:

1) Overall Structure: There is a small welding positioner fixed at one end of the machine bed. It is holding unit of workpiece, and fulfils workpiece tilting function, for adjusting on welding position and angle. There is circular ruler on its lateral side, indicating on the tilted angle;

2) Operation Point: On the lateral side of the machine base along its lengthways direction, an extending rack supports a small gantry of adult people height, and on this small gantry is installed with welding carriage;

3) Performance of Small Pipe Flange Circumferential Seam Welder Equipment:

a) Such kind of design leave ample space for not only welding operation, but also load and unload of workpiece:

b) That welding torch can extend into welding area for carrying out welding operation, and retreats back when workpiece is in loading and unloading process. Such extension and retreat are motor drive;

c) On the opposing end of machine base is a manual adjusting and locking unit. It is for clamping pipe and or cylinder body based on length of workpiece;

4) Operation is made with a handwheel. This clamping unit also revolves in idle. At the front end of welding carriage, there is a manual cross slide for adjusting on welding torch along horizontal and vertical direction, by means of a handwheel right above it;

4. Technical Parameters of Small Flange Circumferential Seam Welding Machine:

D. Small Cylinder Pipe Flange Circumferential Seam Special Design Welding Machine:

The machine is implementing on CO₂ welding on a piece of small cylinder body: (Fig.3)

1. Design of Small Cylinder Circumferential Seam Welding Machine:

1) Structure of this machine incorporates bottom platform, overhead top gantry, and intermediate welding arm;

2) Welding Torch Degree of Freedom:

In this way, welding torch has three dimensional movement available:

a)  In workpiece longitudinal direction along top gantry;

b)  In workpiece axial direction along welding arm;

c)  In vertical direction along welding carriage;

Making sure this machine adaptable for wide variety of application;

2. Fixing of Workpiece Small Cylinder in Circumferential Seam Welder Equipment:

1) Is realized with a pair of vertical rack: The rack at terminal of platform is fixed type;

2) It is also the driving section for workpiece revolve, in the speed of welding velocity;

3) The rack at the other side is moving type, fitting for various length of workpiece, and moves on the bottom platform along length direction of workpiece;

3. The guiderail on the bottom platform is covered with organ cover for protection against infiltration of dust and scrap;

4. Welding Mechanism in Small Cylinder Circumferential Welding Machine:

1) Configuration: This welding equipment is equipped with 2 sets of welding torch which work separately. Each set of welding torch has its own welding carriage and welding arm, boosting productivity in large extent;

2) Welding mode can be: SAW (Submerged arc welding), gas shielded CO₂, strap cladding, hard surfacing, built up welding, or hard surfacing operation, etc.;

3) Welding arm extends from its mounting overhead gantry into welding area in overhanging style. Driven with gas cylinder, the welding torch moves along this arm in fast speed, during on and off of welding operation;

5. Operation in Small Cylinder Circumferential Welding Machine:

This involves below main points:

1) Retract welding carriage back to its original position at gantry beam along its extension arm;

2) Load on workpiece, secure it, and adjust its position for welding;

3) Drive the welding carriage forward into welding area along its extension arm;

4) Adjust position and angle of welding torch for precise management of welding position;

5) In the case of circumferential welding, the two sets of welding torch can perform welding on both ends of workpiece at the same time, doubling production efficiency;

6) In the case of built up welding or hard surfacing in this Circumferential Seam Welder equipment, the two sets of welding torch work in pair, one following the other, for doubling the hard surfacing velocity;

7) At the completion of welding, move the welding torch back to its original position at gantry beam, and unload the workpiece.

E. Summary on Circumferential Seam Pipe Flange Welding Machine:

1. Importance and Wide Use: Circumferential welding does not see as many applications as straight welding and longitudinal welding, but belongs to requisite and indispensable working process. Accordingly, Circumferential Seam Welder machines and equipment are ubiquitous in welding field;

2. Special Design: Based on its myriads of changes in terms of workpiece style and application, these equipment is usually designed and produced in the form of tailor made;

3. Welding Technology: Fillet welding is one of the most welding seams in circumferential welding, and gas shielded CO₂ welding/ MIG is among the most frequently used welding mode;

4. Welding Style: Circumferential seam welding usually carries out welding in automatic way, with workpiece revolves in welding velocity, and welding torch being kept in standstill.