A. Usage and Application of LHA/ LHC/ LHT Series Gantry Moving SAW H Beam Welding Machine:

1. Other Common Used Name of the H Beam Submerged Arc Welding Machine:

In Steel Structure Industry, there are numerous same names with this machine, describing it from aspects of: Workpiece/ mechanical structure/ welding mode:

1)  H Beam SAW Welding Machine;

2)  I H Beam Gantry Welding Machine;

2. Position of I H Beam Gantry Welding Machine:

1) This is the second set of core equipment in H Beam Production Line;

2) Subsequent to H Beam Assembly and Tack Welding Machine;

3) And preceding to H Beam Flange Straightening Machine;

4) These 3 machines constitute the basic working stations in H Beam Production Line;

3. Function of SAW I Beam Gantry Welding Machine:

1) This machine is for fulfilling on finished SAW welding, on the assembled and tack welded T/  I/  H Beam, in the mode of 45° fillet submerged arc welding;

2)  Wuxi JACK LHA series Gantry Moving H Beam SAW Welding Machine and its finished H Beam, at customer workshop: (Fig.1)

3) There are 4 passes of welding seam, which need to be fabricated in any one piece of I/ H Beam;

4) Correspondingly, workpiece H Beam needs to be flipped 90°/ 180°, in the period of SAW fabrication;

4. Vital Importance of Gantry Moving H Beam Submerged Arc Welding Machine:

1) Welding seam is the essential index for appraising on quality of finished H Beam: Its fusion/ penetration/ cover face/ free of defect such as porosity/ mechanical strength;

2) All these indicators are managed during operation of H Beam SAW Welding Machine;

3) So, performance of the machine directly determines quality of finished I/ H Beam.  

B. Classification on LHA& LHC& LHT Series Gantry Moving H Beam SAW Welding Machine:

Depending on mechanical main frame of the machine, this product group can be divided into three main sub groups of:

1. LHA Series Gantry Moving H Beam Submerged Arc Welding Machine:

A set of Wuxi JACK LHA5Z model middle managed (Operator stands at middle of machine gantry frame, taking care on SAW welding on the 2 pieces of H Beam at the same time) machine at customer workshop: (Fig.2)

1) Mechanical main frame of the LHA series H Beam Gantry Welding Machine is an enclosed box frame, driven with motor for its moving along rails;

2) The 2 pieces of welding torches and supporting units are assembled onto the gantry frame;

3) SAW welding is carried out, along with gantry frame moving along parallel rails;

4)  The 2 pieces of workpiece H Beam are laid on its workshop floor fixed triangular brackets;

5)  Working velocity (SAW welding speed) is controlled with A.C. inverter, and displayed instantaneously on hanging operating panel of H Beam Gantry Welding Machine;

6) Subdivision on the LHA series Machine: 

- LHAC side managed types;

- LHAZ middle managed types;

Several models under each branch, depending on the max. web height of H Beam;

7) Wide Use: LHA series machine has top selling volume among its product group;

8) Applicable Application Site: This series is operated as individually working H Beam SAW Welding Machine, not suitable for being deployed in automatic H Beam Production Line. It usually works in the form of one set or two sets as a group;

A set of Wuxi JACK LHA5C model side managed Gantry Moving SAW H Beam Welding Machine, works at Indian customer facility: (Fig.3)

2 sets of Wuxi JACK LHA5Z model central control model: (Fig.4)

2. LHC Model Column Moving SAW H Beam Welding Machine:

1) Mechanical main frame of the LHC column trolley model is a motor drive column boom trolley;

2) The single piece of welding torch is assembled onto overhang boom of the trolley;

3) SAW welding is carried out, by means of trolley moving along parallel rails;

4) The single piece of workpiece H Beam is laid onhydraulic drive 60° Overturning Racks;

Wuxi JACK LHC model H Beam SAW Welding Machine and its 60° Overturning Racks: (Fig.5)

5) Working velocity (SAW welding speed) is controlled with A.C. inverter, and displayed instantaneously on column embedded operating panel;

6) Applicable Application Site: Most majority of LHC model machine work in SAW zone of automatic H Beam Production Line, 4 sets as a group;

Wuxi JACK automatic H Beam Production Line and its 4 sets of LHC model SAW H Beam Welding Machine: (Fig.6)

3. LHT Model T Frame I Beam Gantry Welding Machine:

1) Mechanical main frame of the LHT open structure machine is a set of motor drive T frame;

2) The 2 pieces of welding torches are assembled onto motorized moving T frame;

3)  SAW welding is carried out, along with T frame moving along parallel rails;

4) The 2 pieces of workpiece H Beam are laid onto its facility land secured triangular racks;

5) SAW Welding velocity is controlled with VF A.C. inverter, and displayed in real time, on hanging operating panel of the H I Beam Gantry Welding Machine;

6) Applicable Application Site: Same as LHA, LHT also works as individual H Beam SAW Welding Machine, in the form of one set or two sets;

Installing 2 sets of Wuxi JACK LHT model machine: (Fig.7)

C. Main Specifications of LHA/ LHC and LHT SAW H Beam Gantry Welding Machine:

1. Suitable Workpiece Size for Different Models of H Beam SAW Welding Machine:

1) LHC and LHT models, its available max. web height of H Beam can be up to 1500mm to 2000mm;

2) LHA Series H Beam Gantry Welding Machine, 

There are 5 standard models as below:

2.  Typical Technical Parameters of SAW H Beam Welding Machine: