4m Rail Span LHA4Z Automatic H Beam Gantry Welding Machine

The attached first photo was taken on a set of Wuxi JACK LHA4Z model gantry structure Automatic H Beam Submerged Arc Welding Machine put into use at customer site.

1. Working Capability of LHA4Z Gantry Structure Automatic and Comparison with LHA4C H Beam Welding Machine: 

Design print on LHA4Z model machine: (Fig.1)

1) Working Capability of LHA4Z H I Beam Gantry Welding Machine:

a) Meaning: As explained in the product section of “LHT T type H Beam Submerged Arc Welding Machine”, LHAZ stands for center control operation mode in Chinese language;

b) H Beam Height to be Produced: And the figure “4” in its model implicates that this machine has 4,000mm gantry span (Or rail span). This is the smallest model in LHA series machine, producing welding H Beam with its web height up to 1,200mm;

2) Comparison with LHA4C H Beam Welding Machine:

a) On the contrary, for side control style gantry structure H Beam Welding Machine, the counterpart of LHA4C with the same dimension of 4,000mm gantry span, the delivered welding H Beam can have its web height up to 1,500mm;

b) In this respect, for center control gantry style LHAZ model machine, it sacrifices size of welded H Beam to make up for ease of operation --- one less operator in LHA4Z center control model, compared with LHAC side control automatic model machine;

c) Application Volume: For this reason, the LHAZ series center control model sees more application than LHAC side control model nowadays, suppose customers produce medium small sizes of welding H Beam.

2. Brief on Operating Process of Automatic LHA Series I Beam Gantry Welding Machine:

 Finished welded H Beam: (Fig.2)

1) Welding Times for Producing One Piece of H Beam: Because each piece of H Beam has four pieces of seams waiting to be welded, so the LHAZ model machine needs to perform four times of SAW (Submerged Arc Welding) on the H Beam. And because this structure of automatic machine has two welding stations in one equipment, each time it can weld two pieces of H Beam together at the same time;

2) Welding Mode: To fulfil the SAW on the abovementioned four seams of welding H Beam, this set of LHA4Z model machine needs to move back and forth four times in a row along its rail in welding speed:  At customer site: Running station of Wuxi JACK LHA4Z machine: (Fig.3)

a) Weld the first piece of welding seam. Along this stroke the gantry moving speed is adjustable welding speed, controlled with A.C. inverter, and display real time on operating panel of the machine;

b) At the completion of the first piece of seam welding, the gantry moves backward to its original starting point in quick idle speed;

c) The H Beam is turned 90° by means of overhead traveling crane or other flipping equipment, to 45° fillet welding position of the another welding seam of H Beam, on workpiece rack of the LHA4Z model machine;

d) The Automatic H Beam Welding Machine performs the second piece of seam welding same as the first piece of welding seam mentioned as above;

e) At the completion of the second piece of seam welding, the gantry of the H Beam SAW Machine goes back to its starting point again in high idle speed;

f) The H Beam is flipped to welding position of it’s the third seam as the step of No. C;

g) The same SAW process is implemented for the third and fourth seams of the H Beam in this LHA4Z model machine;

3) Working Process of Automatic H Beam Submerged Arc Welding Machine:

For each piece of SAW seam on the H Beam,

a) With the help of overhead traveling crane, hoist H Beam onto its supporting rack, or change welding position of the H Beam on the rack --- To the ideal position of 45° fillet welding;

b) Adjust mechanical seam tracing unit of welding torch mechanism;

c) Start on welding power supply equipped with the LHA4Z model H Beam SAW Machine.

3. Technical Parameters of LHA4Z Automatic H Beam Welding Machine: