LHA Gantry Type H Beam Submerged Arc Welding Machine

Background: The attached photos were taken at different steel structure facilities across the globe and regions, on different design of LHA series H Beam Gantry Welding Machine produced by Wuxi JACK for worldwide customers.

1. The Application and Characteristic of LHA series Gantry type H Beam Welding Machine:

1) Position in H Beam Production: As introduced in its product category, this machine is the second set of core H Beam Production Machine following H Beam Assembly Machine, and also the most important one: The welding H Beam output from this machine is already finished product. The H Beam Straightening Machine following it is for dressing the welded H Beam;

2) Welding Mode:  This series of Gantry type H Beam SAW Machine performs 45° fillet position submerged arc welding (short for SAW) on the assembled and tack welded H Beam made with the H Beam Assembly Machine. For each piece of H Beam, there are four pieces of seams to be welded, see below sketch:  (Fig.1,2)

Front view on H Beam SAW welding in Wuxi JACK LHA model: (Fig.1)

Design sketch on finished welded H Beam from the machine: (Fig.2)

2.  Classification on LHA series Gantry type H Beam Welding Machine and Application:

1) Three General Types of Gantry type H Beam Welding Machine:

Depending on variety in structure of machine frame:

a)  Motor drive moving Gantry type --- LHA series, including LHAZ and LHAC; (Sketch see below)

b) Moving Column type --- LHC series: (Fig.3) 

c) T frame H Beam SAW Machine --- LHT series: (Fig.4) 

2) Of which the gantry type LHA H Beam Gantry Welding Machine sees the widest application. It can not only be used in semi-automatic H Beam production line, but also work as individual independent automatic H Beam Production Machine for performing SAW on workpiece;

3) Due to the feature of its frame structure, the LHA model machine is not applicable to be applied in automatic line.

2. Structure Brief and Disparity in LHA series H Beam Gantry Welding Machine:

1) Composition:  Each set of automated LHA machine has two welding stations installed on its gantry frame;

2) Sub-division on LHA Gantry type I Beam Submerged Arc Welding Machine:

And, based on position of operator, LHA series  has two sub categories of:

- Center control, LHAZ model;

- Side control, LHAC model; 

 Please check below sketches to compare:

a) Center control (LHAZ) machine:  (Fig.5)

The standard models include LHA4Z, LHA5Z, LHA55Z;

b)  Side control LHAC model machine:  (Fig.6)

The standard models include LHA4C, LHA5C;

3) Number of Operator for Each Model: We can see that the LHAZ model H Beam Gantry Welding Machine needs only one operator to take care the SAW process during work, while LHAC model needs two operators to work on the machine;

4) Characteristic: On the other hand, for welding H Beam of same size (Especially large size bigger than 1500mm height), the LHAZ model has larger size of gantry compared with that of LHAC: As a summary, each type of these Gantry type H Beam SAW Machine has its strong points and weak points.

5) Based on that, when purchasing LHA series machine, customer can choose the most fitting type based on your preference.

3. Technical Parameters of LHA Series H Beam Gantry Welding Machine: