45° Fillet Welding LHA Series H Beam Gantry Welding Machine

2 Major Structures and Arrangement of LHA Models Machine: There are variations in specific structure and size of LHA series Gantry H Beam Welding Machine in practical use. The attached photos indicated on several of typical models of its kind. For sketch on two main types of its structure applied in LHA models, please check below: 

  LHAZ models: Operator stands at center of machine, one people take care on welding of 2 pieces of H Beam: (Fig.1)

LHAC models: Operators stands at both sides external of machine, need two operators, to monitor on welding of 2 pieces of H Beam individually: (Fig.2)

1. SAW Power Supply in Various types of Gantry H Beam Welding Machine:

1) Importance: As introduced in this product category, H Beam SAW Machine is the core H Beam Production Machine in the manufacturing process of welding H Beam, which affects quality of the H Beam produced to the greatest extent;

2) For this reason, the SAW power source we outsource for LHA series machine, as well as LHC column type and LHT T type Gantrymodel, is of the top notch in the welding equipment industry;

3) Two Options on SAW Power Source in H Beam Welding Machine:

With years of testing and validation, we recommend two options on SAW power source to be used in this product group for H Beam welding:

a)  Chinese Brand HUAYUAN ZD7-1000: (Fig.3) 

b) U.S. Brand Lincoln DC1000:  (Fig.4)

4) Of which the Chinese HUAYUAN has very good cost performance. It is stable and consistent in delivering high standard of welding quality, with reasonable equipment price. Nowadays, HUAYUAN is one of the main brand SAW power supplies, that are equipped in Wuxi JACK LHA/ LHT/ LHC series Gantry H Beam Submerged Arc Welding Machine.

2. SAW Power Supply in H Beam Submerged Arc Welding Machine:

1) Function of SAW Power Supply in H Beam SAW Machine:

a) ZD7 series inverter control integrated function power source can be used in diversified welding mode, including automatic submerged arc welding, electroslag welding, sticking welding and arc air gouging;

b) Besides, this power supply also has very satisfactory delivery on DC single wire welding and strip surfacing;

2) Technical Characteristic of SAW Power Supply for H I Beam Gantry Welding Machine:

a) The main control circuit of this ZD7 SAW power source is of IGBT inverter circuit. It has strong points of superior dependability, quick reaction time, and consummate dynamic characteristic;

b) The ZD7 SAW power source has capability of compensating automatically against potential risk of grid voltage fluctuation, making sure stable and consistent arc burning during SAW welding operation, as well as guaranteeing on good appearance and high intensity welding seam generated;

3)  Working Principle of SAW Power Supply in Gantry H Beam Welding Machine:

ZD7 series inverter control integrated capability welding power supply utilizes inverter main circuit as its control loop, as shown below:  

Working principle of ZD7 SAW welding power supply: (Fig.5)

a) During SAW implementation in the Gantry H Beam SAW Machine, the three phase A.C. power from workshop utility is converted to 20KHz high frequency D.C. current, after being rectified through three phase rectifiers;

b) By means of the IGBT inverter, this high frequency D.C. current will be inverted to A.C. high frequency current as transition;

c) Following that, this inverted A.C. high frequency current will be rectified back to D.C. current again: With the continuous going through voltage diminishment in the high frequency transformer, the A.C. current is rectified to D.C. type back again;

d) This D.C. current is then filtered through reaction loop, and controlled by the signal from the current negative feedback;

e) After being amplified, this negative feedback signal is fed into the inverting interface of the error amplifier, and running through the pulse width adjusting integrated circuit;

f) By this time, this amplified signal can control the working time of IGBT, and hence inverter rectifier can get the required external characteristic, for getting the expected performance of the LHA Gantry H Beam Welding Machine;

4) For control console of the SAW power source used in Wuxi JACK LHA model machine，please check attached picture and below:  

Control console panel of ZD7 SAW welding power supply: (Fig.5)

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