LHA4C Side Control Gantry Type H Beam Submerged Arc Welding Machine
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LHA4C Side Control Gantry Type H Beam Submerged Arc Welding Machine


With max. H Beam web width of 1500mm, the LHA4C gantry type H Beam SAW machine does not have counterpart in center control (LHA4Z is 1200mm, and LHA5Z is 1800mm). On the other hand, for H Beam production equipment, 1500mm is one of the standard indexes in terms of max. web width, and also the most used one, due to its medium size. For this specific model of LHA4C, the corresponding suitable Assembly machine is Z15.


Judging on the surface, as a side control (Operators stand at external side of H Beam at the outside of machine rail), this series of automatic gantry type H Beam SAW machine has the “drawback” of needing two operators to manage SAW of two workpiece, instead of only one operator.

However, as a saying goes “Anything existing must be reasonable”, with such kind of arrangement, it has several merits, which is important to customer:

  1) Land Occupation:

     As explained before, for the same size of H Beam web, LHAC H Beam SAW machine is more compact than LHAZ

     in terms of machine size (10% less);

  2) Welding Quality Assurance:

     With each operator takes care each piece of H Beam welding, he or she does not need to distract attention 

    from this H Beam to the other during the simultaneously two H Beam SAW process. Which means, the operator 

   can focus on the welding of specific H Beam whole heartedly, and thus can deliver welded H Beam of high 

    quality in greater probability.

    Anyway, as introduced in product category of these series of high quality H Beam Submerged Arc Welding

    machine (LHAZ, LHAC, LHC, LHT), submerged arc welding is the most important step for in H Beam production

    process technology, in terms of finished product quality control;  

  3) Working Process Management:

     Also, because 2 operators work at the same time, they can manage working process of this high fficiency gantry

     type H Beam SAW machine easily and calmly:

     - Cooperate and act as each other’s back up. When any one of the operators needs to leave working site in a 

         short time, the other can substitute his or her job immediately;

     - Monitor SAW process of the two H Beam together. If one operator has an absent-mind at certain time, the

         other operator can make up for the ignorance;

     - If ever contingency or problem happens, they can deal with the condition without in a hurry


On the other hand, with 2 operators operate this automatic H Beam SAW machine together, synchronous work is very important. Otherwise, suppose such a situation, that one operator starts on welding process, while the other does not…

For this reason, in control system of this side control style automated gantry type H Beam SAW machine, there is interlock between the 2 welding stations. Which means, as in the above-mentioned case, only 2 operators start the welding machine, can begin the process of gantry travel and SAW.

As a supplementary note for this topic, with the interlock of the two welding stations, the stations are not at equal level: That one is master control, and the other is slave control. This is also realized with control system of this efficient gantry type H Beam SAW machine.


Below are specifications of this LHA4C side control high quality gantry type H Beam SAW machine:




Operator   Working Position

Both sides of Gantry, external sides of supporting racks

H Beam Flange   Width (mm)

200 ~ 800

H Beam Flange   Thickness (mm)

6 ~ 40

Can be special made

H Beam Web   Height (mm)

200 ~ 1500

H Beam Web   Thickness (mm)

6 ~ 32

Can be special made

H Beam Length   (mm)

4000 ~ 15000

Gantry   Span (mm)


Gantry   Travel Rail Length (mm)





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