LHA Gantry Type H Beam Submerged Arc Welding Machine

A. Application and Characteristic of LHA Series I H Beam Gantry Welding Machine:

1. Extensive Use: The attached photos were taken at different steel structure facilities across the globe and regions, on different design of Wuxi JACK LHA series Gantry type I Beam Submerged Arc Welding Machine;

2. In process technology, LHA model is the second set of core I H Beam Production Machine following H Beam Assembly Machine: The welded H Beam output from this machine can be viewed as finished workpiece on steel structure construction. The H Beam Straightening Machine following it is for flattening on the welded H Beam flange;

3. Function: This machine performs 45° fillet position submerged arc welding (short for SAW) on the assembled and tack welded H Beam. For each piece of H Beam, there are four pieces of seams to be welded:

1) Sketch on H Beam to be SAW welded: (Fig.1)

2) Wuxi JACK LHA5Z model machine, works on 2 pieces of H Beam SAW welding: (Fig.2)

3) Close view on H Beam in 45° orientation for SAW, and welding torch mechanism right above it: (Fig.3)

4. Large Using Volume of LHA Gantry type H Beam SAW Machine:

Of the 3 structures of machines on H Beam SAW welding:

1) LHC model cantilever structure on moving trolley: (Fig.4)

2) LHT model T frame with open structure: (Fig.5)

3) LHA models moving gantry structure: (Fig.6)

LHA models have the largest application volume, which is even the default selection under majority conditions, if not specifically mentioned. It can not only be used in semi-automatic production line, but also work as individual independent of H Beam Production Machine. Due to the feature of its frame structure, the LHA machines are not applicable for fully automatic line.

B. Structure and Disparity in LHA Series Gantry type H Beam Welding Machine:

1. Quantity of Welding Torch: Each set of LHA machine has two welding stations installed on its gantry frame, ability of working on 2 pieces of H Beam together;

2. LHAZ Center Control Versus LHAC Side Control I H Beam Gantry Welding Machine:

Based on position of operator during welding operation, LHA models machines have two sub categories as below:

1) Center Control, or Middle Control LHAZ Models I H Beam SAW Machine:

a) This refers to operator stand at passage between the 2 arrays of H Beam supporting racks, the middle center of machine. So, only one operator necessary on operation. On the other hand, the area zone for operator compromises the max. height of H Beam web available for welding;

b) Operation station of machine operating panel and welding power supply control console are also installed at middle of motorized moving gantry overhead Beam:

c) Design sketch on LHAZ center managing machine: (Fig.7)

d) Wuxi JACK engineer stand together with customer operator on LHA5Z model middle working machine: (Fig.8)

e) Models: There are 3 standard models of LHAZ: LHA4Z/ LHA5Z/ LHA55Z;

2) Side Control, or Lateral Control, LHAC Models I H Beam Welding Machine:

 a) This refers to operators stand at external sides of H Beam support racks. So, two operators are needed to work on I H Beam Gantry Welding Machine operation, and H Beam web height is larger than center control, when the machines have same rail span;

b) Operating stations are accordingly installed at left and right sides of machine main frame Beam, 2 places:

c) Design sketch on LHAC lateral managing machine: (Fig.9)

d) Two operators stand at lateral side of Wuxi JACK LHA5C model side operation machine: (Fig.10)

e) Standard models of side control include LHA4C and LHA5C;

3. Summing up, when purchasing LHA series I H Beam Gantry Welding Machine, whether it should be middle operation or side operation, customer can choose the most fitting type based on your preference and condition.

C. Supply Range of LHA Series Gantry type H Beam SAW Machine:

Below is the complete configuration for a set of machine:

1. Machine Mechanical Main Body:

1) Motor drive moving gantry frame;

2) Two sets of motor drive moving carriage along gantry horizontal Beam, for fitting on welding torch mechanical, welding wire feeding tube and attachments;

2. Gantry Moving Parallel Rail of LHA I H Beam Gantry Welding Machine:

1) Two pieces in parallel, for guiding gantry movement along H Beam and perform SAW during work;

2) Its span determines on model of each model in machine. For example, model LHA55Z, this implicates on 5,500mm rail span, of middle operation machine;

3. SAW Welding Systems in LHA Models H I Beam Submerged Arc Welding Machine:

1) Mechanical Welding Unit: (Fig.11)

Two sets of welding torch and its supplementary unit;

2) SAW Welding Power Supply: (Fig.12)

Two sets, either Chinese brand HUAYUAN ZD7-1000 model, or U.S. Lincoln brand DC-1000 models, all have stable and solid quality;

3) SAW Welding Wire feeder, two sets, for feeding welding wire onto welding points on H Beam;

4) SAW Welding Flux Conveying and Recovery unit, two sets, for sending and recycling welding flux;

5) Welding Arc Track Unit: (Fig.13)

Two sets, for welding arc guide and torch adjustment, to make sure always correct position of welding tip, so as to guarantee consistent and superior welding performance;

4. Electric Control System, including control board, operating panel, control elements;

5. Piping System, including power supply cable of machine, control cable, air source tube, control cable of gantry, wire hanging sliding rack, welding cable, etc.

6. Spare parts, including three pieces of pushbuttons, three pieces of 6A and 4A RL8B-32 fuse each, two pieces of 10A fuse. Spare parts may varies on specific model and customer demand on the machine.

D. Interlock Operation in LHAC Side Control I H Beam Gantry Welding Machine:

1. Why Need Interlock: In the case of LHAC models side control, because there are two operators operate on the same set of machine together, synchronous work is very important. Otherwise, suppose such a situation, that one operator starts on welding process of one welding torch, while the other does not start on the other one…

2. For this reason, in electric control system of the machine, there is interlock between the two welding stations. Which means, as in the case of two operators work individually at both sides of machine, only after two operators start the SAW welding power supplies together, can begin the process of gantry movement and SAW operation:

3. Working side of Wuxi JACK LHA5C model side management Gantry type H Beam SAW Machine: (Fig.14)

E. Technical Parameters of LHA Series Gantry type I Beam Submerged Arc Welding Machine: