Large Current Workpiece Stationary LHA Series H Beam Welding Machine

LHA series Gantry H Beam SAW Equipment can be seen everywhere across all facilities of steel structure industry, delivering superior quality welding H Beam of sizes: 

Two major types of LHA: Depending on operator stands at middle of frame, or lateral sides: (Fig.1, 2)

1. SAW Put into Use in LHA H Beam Gantry Welding Machine:

1) For all the heavy duty machine, including LHA/ LHC/ LHT models, since its main duty is to finish SAW on the workpiece, the proper selection on specific welding mode, and model of SAW welding power source, as well as control console accordingly, is very important;

2) In the product section of “45° Fillet Welding LHA Series” and “LHC Column type High Quality”, we recommend two brands of SAW power source: The Chinese HUAYUAN and U.S. Lincoln.

2. Model Selection and Combination in LHA Gantry I Beam Welding Machine:

Going further, there are several models of these SAW power supply to be selected for being applied in the machine:  (Fig.3)

1) ZD7-1000(HUAYUAN) or DC-1000(Lincoln) for I Beam Welding Machine:

a) This refers to D.C. current of max. 1000A for SAW welding. It can meet the requirement of most majority SAW;

b) For all the large size model machine produced by Wuxi JACK (H Beam, LHT and LHC H Beam SAW Machine also), under the Single Arc submerged arc welding mode, we use this model of either of the two brands;

2) MZE-1250(HUAYUAN) or AC-1250(Lincoln) for H Beam SAW Equipment:

a) This refers to A.C. current of max. 1250A. It is seldom used as sole SAW power source for our automatic machine (H Beam, and LHT& LHC models also);

b) Instead, under Tandem Arc SAW mode, it works together with DC-1000 (or ZD7-1000) SAW power supply. Which means, one set of DC-1000 and AC-1250 each for Lincoln, or one set of ZD7-1600 and MZE-1250 each for HUAYUAN, to be used in combination;

3) ZD7-1250(HUAYUAN) or DC-1500(Lincoln) for H Beam Gantry Welding Machine:

This refers to D.C. current of max. 1250A for HUANYUAN, and 1500A for Lincoln. Both the models have too large current, which is not applicable for working as SAW power source of our heavy duty models.

3. Difference between D.C. and A.C. SAW Power Source in Gantry H Beam SAW Equipment:

1) D.C. power source features in delivering welding seam of deeper crater and deposition;

2) A.C. power source features in delivering welding seam of wider weld fusion and comparative good appearance;

3) For our heavy duty LHA H Beam Gantry Welding Machine (LHT and LHC also), the SAW power source is one set of Lincoln DC1000 (or HUAYUAN ZD7-1000) for Single Arc, and, as mentioned in the previous segment, one set of Lincoln DC1000 together with one set of Lincoln AC1250 (or one set of HUAYUAN ZD7-1600 together with MZE 1250 each) for Tandem Arc.

4. Model of Welding Power Source Consoles in LHA H Beam Gantry Welding Machine:

1) For HUAYUAN brand power source, there is no independent model for the console. It shares the same model with the power source: (Fig.4) 

2) For Lincoln brand power source, the mating console used in series of H Beam SAW Welding Machine:

a)  NA-3 for DC1000 model SAW power supply;

b)  NA-4 for AC1250 model SAW power supply;

c)  NA-5 is the version of state-of-art digital control (welding parameters pre-set and display);

d) Lincoln Wire feeder also has the model of NA-3. Need to take care no confusion between console and wire feeder.

5. Technical Parameters of LHA H Beam Gantry Welding Machine: