LHA Gantry Type High Efficiency H Beam Submerged Arc Welding Machine
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LHA Gantry Type High Efficiency H Beam Submerged Arc Welding Machine

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LHA produces H Beam (I Beam) in high degree of productivity. This is the reason it can be described as high efficiency automatic I Beam gantry welding machine.

 

As is known is in the field of welding technology, submerged arc welding has 3 types of:

  1) Single Arc

     This means “single piece of welding wire generates single welding arc”.

     - With this type of SAW, welding height of each pass of welding is around 10mm;

     - In such case, one set of welding power source is used for welding one piece of workpiece;

     - So, for this LHA large H Beam gantry welding machine (T type LHT also), one set of the machine should be

       equipped with two sets of welding power source (Because 2 pieces of H Beam are welded at the same time). 

       And for column type LHC, one set of machine should be equipped with one set of welding power source 

      (Because 1 piece of H Beam is welded at one time);

  2) Tandem Arc

      This means “Two pieces of welding wire generate double welding arc”. With such type of SAW, welding 

      height of each pass of welding can be up to 20mm.

      For this reason, for the H Beam with web thickness above 20mm (usually we call these H Beams as “thick

      ones”), customers have two options:

      -  Either adopts with Single Arc. The I Beam gantry welding machine moves back and forth along the rail two

         times, and at the same time apply SAW on the H Beam two times;

      - Or, adopts with Tandem Arc. Under such condition, the efficient I Beam gantry welding machine can finish

         SAW on the H Beam with one pass welding. So, it doubles productivity also;

      - With Tandem Arc, 2 sets of welding power source should be used for one piece of H Beam. Or, in other

         words, 4 sets of power source for one set of automated I Beam gantry welding machine (This is true with

         LHT also; And for one set of LHC column type, it should be 2 sets of power source);

  3) Twin Arc

     This means “Two pieces of welding wire generate single welding arc”. It is usually applied in Flat Fillet 

     welding:

     - Flat Fillet welding means the workpiece is put flat at horizontal position, while welding torch is at 45°;

     - The H Beam Assembly Weld Straighten Integral machine developed by our company is adopted with Flat Fillet

       welding;

     - As compared, the 45° Fillet welding used in LHZ/ LHC/ LHA high quality I Beam gantry welding machine is, 

       workpiece H Beam is put at 45° position, while welding torch is at straight vertical downward position;

     - Flat fillet welding is not as easy as 45° fillet welding in terms of producing welding seam of good appearance.

        However, with adoption of Twin Arc, this target can be met;

     - Also, Twin Arc can raise welding speed around 5%, making contribution to high efficiency of production;

     - To have an intuitive compare on Flat Fillet welding applied in PHJ&ZHJ H Beam Assembly Weld Straighten 

       Integral machine, with the 45° Fillet welding (both types belong to submerged arc welding) applied in LHC 

       column type& LHT T type & LHA large I Beam gantry welding machine, please check below 2 pictures:

 45° Fillet welding

Flat Fillet welding

Below are specifications of this LHA High Efficiency I Beam Gantry Welding Machine:

Parameter

Specification

Note

H Beam Flange   Width (mm)

200 ~ 800


H Beam Flange   Thickness (mm)

6 ~ 40

Can be special made

H Beam Web   Height (mm)

200   ~ 1200/1500/1800/2000

Varies  on models

H Beam Web   Thickness (mm)

6 ~  32

Can be special made

H Beam Length   (mm)

4000  ~ 15000

Can be special made

Submerged   Arc Welding type

45° fillet welding


Submerged   Arc Welding mode

Single Arc,

Or  Tandem Arc


Welding Power Source quantity

2  sets in the case of Single Arc,

And 4 sets in the case of Tandem Arc

Machine quotation is different as in the case of Single Arc and Tandem Arc

 


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