Gantry Moving Speed Adjustable LHT Series I Beam SAW Machine

Appearance and on site working condition of LHT model H Beam Gantry Welding Equipment please see the attached photos. Its design sketch please see below:  (Fig.1)

1.     Function of LHT Model H Beam Gantry Welding Machine:

1)      The LHT is a kind of classical automatic Gantry type H Beam Welding Machine. It is used for submerged arc welding on H Beam in the form of Single Arc or Tandem Arc, following the step of assembling and tack welding in the process technology of welding H Beam production;

2)      Same as LHA series (LHAC side control and LHAZ center control) Gantry type I Beam Submerged Arc Welding Machine, LHT model Gantry type H Beam SAW Welding Machine is not used in fully automatic H Beam Production Line. Instead, this LHT equipment is worked as independent H Beam Welding Machine. One operator can manage its working process: (Fig.2) 

2.     Flux Recovery Units in LHT Model Gantry type H Beam Welding Machine:

1)      Importance of Flux Recovery unit in H Beam Welding Machine:

All the H Beam SAW Welding Machine is equipped with automatic flux recovery and recycling unit. It is requisite unit for SAW (Submerged arc welding) process in the H Beam Welding Machine. So, besides LHT, the LHA gantry structure and LHC column structure I Beam Submerged Arc Welding Machine are equipped with this unit also;

2)      Working Principle of Flux Recovery unit in H Beam Welding Machine:

a)       During the SAW welding in the H Beam SAW Welding Machine, flux flows onto welding seam by way of flux hopper (the yellow one fit at front side of gantry beam, see below picture marked with red color square frame) and manual valve, guaranteeing normal welding procedure implemented in the H Beam Gantry Welding Machine: (Fig.3) 

b)      Recovery tube recycles redundant flux following welding tip for next time use;

c)       By screening of sieve, those fluxes that can be recycled will flow into flux hopper again by way of manual valve;

d)      Dust is collected into flux recovery unit, and those flux in block remains inside flux hopper.

3.     Pneumatic System in LHT Model H Beam Gantry Welding Machine:

1)      As explained in the product section of “LHT T type I Beam Submerged Arc Welding Machine”, all the H Beam SAW Welding Machine do not have hydraulic system. Power momentum for machine operation is supplied with motor reducer and air cylinder;

2)      The arc tracker system of these H Beam welding machine utilizes both mechanical style and pneumatic style, eliminating common problems with solitary mechanical unit, including huge impact, high failure rate, unreliable tracking, etc.: (Fig.4) 

3)      By pre-setting on the air cylinder, welding torch is guided along the welding seam all the while during the whole SAW welding in the H Beam Welding Machine, with stable running and good welding quality.

4. T Frame Traveling along the Rail during work of the LHT model H Beam Gantry Welding Machine:

1)      Same as column style LHC and LHA Gantry type H Beam SAW Welding Machine, T frame travel of the LHT H Beam Welding Machine can be shifted between high speed (Idle, 3.2m/min.) and low speed (welding, 0.24~24m/min.), during operation of the LHT model H Beam Gantry Welding Equipment, based on practical need: (Fig.5) 

2)      This SAW welding speed for the LHT H Beam SAW Welding Machine is controlled with A.C. inverter. Its working principle:

a)       The inverter rectifies A.C. electricity into D.C. electricity;

b)      Then inverts the D.C. electricity back into A.C. electricity of adjustable voltage and frequency;

c)       The inverted A.C. electricity then powers A.C. motor, attaining purpose of smooth speed control in the H Beam Welding Machine;

3)      During SAW welding of the H Beam Welding Machine, the inverter gives protection on motors against overload, over voltage, over current, and phase failure, etc.;

4)      Also, it can execute automatic compensation against voltage fluctuation, ensuring stable running of motor in the H Beam Gantry Welding Machine.

5.     Technical Parameters of LHT model H Beam Gantry Welding Machine:

Below are specifications of this LHT T type High Efficiency Gantry type H Beam Welding Machine: