BAC Document Number: 273 199 5230 Welding
Generator Extended Brazing Gun Service Manual
28/08/2012
Page
7
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23
4.0 PINBRAZING USING A WELDING GENERATOR AS A POWER SOURCE
When a welding generator is to be used in place of the battery pack it must be
"calibrated" to the pin brazing gun and must conform to the following specification:
•
Power output 300 amps DC minimum
•
Negative earth
•
Output voltage adjustable (max 45v)
•
Capable of fine adjustment
4.1 SETTING UP THE WELDING GENERATOR
The current and voltage of the welding generator will require adjusting in order to
achieve the optimum braze as indicated in section 6.0 Fig 7.
In order for the brazing gun to operate satisfactorily the minimum required welding
generator output is 240A 36V DC, however due to variables such as cable lengths
and other factors that may introduce a resistance it will be necessary to make some
trial brazes and adjust the welding generator output until the set output is achieving
an acceptable pin braze. A note of the settings should be made for future reference.
•
Initially adjust the current output to 240A DC negative earth*.
•
Adjust the output voltage to 40V DC*.
•
Load the brazing gun as detailed in section 5.1 Fig 2.
•
Adjust the brazing gun as detailed in section 5.2.
•
Make a series of test brazes and adjustments as necessary until and
acceptable braze as detailed in section 6.0.
•
Make a note of the Generator (Inverter) settings.
*Or as close as is practical.
5.0 PREPARATION OF THE SURFACE
It is crucial in order to achieve a successful pin braze, the area of connection onto the
pipeline (or other metal substrate) has a clean bright metal finish. In order to achieve
this some degree of surface preparation will be required.
Pipeline and plant owners often have their own procedures for surface preparation
and you should fully familiarise
yourself with these procedures prior to any surface
preparation works.
