Middle Management LHA5Z I Beam Submerged Arc Welding Machine

The attached first three photos were taken on LHA5Z model Wuxi JACK Gantry type I Beam Welding Machine working at different steel structure facilities. You can judge its control style at first glance: Operator stands at center of this machine.

1. Variations in Control Style and Dimension of LHA Series Gantry type H Beam Welding Machine:

1) Varied Dimensions in LHA: Among the three types structure of H Beam Submerged Arc Welding Machine, the LHA gantry frame  is the only one that has many variations in terms of operator station (center control LHAZ versus side control LHAC), and rail span (4,000mm, 5,000mm, 5,500mm): 

Design sketch on LHA model: (Fig.1) 

2) Such variation in machine is determined by feature of its mechanical frame structure: Gantry is a kind of closed one, which poses restriction on both H Beam size and operating station. Instead, both column type (LHC) H Beam Welding Machine and T type (LHT) Gantry type H Beam Submerged Arc Welding Machine has open type machine body, which has no such confinement.

2. Strong Points and Limitation of LHAZ Series Gantry type H Beam Welding Machine:

1) Strong Points of LHAZ Series H Beam Gantry Welding Machine:

Of which the LHA5Z is the most often selected model. This is because:

a) LHA5Z model can weld H Beam with web size up to 1,800mm, meeting majority H Beam production demand;

b) Center control LHAZ model need only one operator to take care the SAW (Submerged arc welding) process;

2) Limitation of Gantry type I Beam Welding Machine:

Of course, every solution has its advantage and disadvantage. For center control gantry type machine, two obvious shortcomings are:

a) As explained, the same rail span of LHAZ has smaller H Beam size than side control LHAC: For this 5,000mm rail span, with LHA5C model machine, the biggest H Beam web width can be up to 2,000mm, compared with 1,800mm for LHA5Z;

b) Another is operation inconvenience for operator. As can be conceived from the sketch, for side control of LHAC H Beam Gantry Welding Machine, operator stands at outside of H Beam, which is easy for operator to move around for various action, such as fetching a tool, checking and confirming a condition, etc.: 

Operating station of Wuxi JACK LHAC machine at India customer factory: (Fig.2)

c) While for operator of LHAZ center control Gantry type I Beam Welding Machine, standing in the middle of the machine beneath the gantry and between the two pieces of parallel rails, he or she needs to make a detour in further distance to accomplish the tasks: 

Operation site of Wuxi JACK LHAZ models machine: (Fig.3)

3. Configuration of LHAZ Series H Beam Gantry Welding Machine:

Taking LHA5Z as example, this is the complete configuration for a set of machine:

1) Machine body --- Gantry frame, two sets of moving carriage for fitting welding torch, wire feeding tube and attachments, on front face of the gantry;

2) Rail --- Two pieces in parallel, for guiding gantry travel along H Beam and perform SAW during working of the machine;

3) Mechanical welding unit --- Two sets of welding torch and its attachment: 

Wuxi JACK LHAZ model at its 2 pieces of welding function units: (Fig.4)

4) SAW Welding Power Supply --- Two sets, either Chinese brand HuaYuan(ZD7-1000) or U.S. Lincoln(DC-1000) has stable and solid quality: (Fig.5)

5) SAW Welding Wire feeder --- Two sets, for feeding welding wire during SAW welding;

6) SAW Welding Flux Sending and Recycling unit --- Two sets, for welding flux conveying and recycling;

7) SAW Welding Arc Tracing unit --- Two sets, please see the attached sixth and below photos, for welding arc guide and torch adjustment during SAW welding: 

SAW welding arc tracker equipped with LHA machine: (Fig.6)

8) Control System---Includes Control board, operating panel, control elements;

9) Piping System--- Power supply cable of machine, control cable, air source tube, control cable of gantry, wire hanging sliding rack, welding cable, etc.

10)  Spare parts --- Include three pieces of pushbuttons, three pieces of 6A and 4A RL8B-32fuse each, two pieces of 10A fuse (Spare parts may varies on specific model and customer demand) on the H Beam Gantry Welding Machine.

4. Technical Parameters of LHA5Z Gantry type H Beam Welding Machine: