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6.6.9
Adjustment of wave frequency
This section explains how to adjust the wave frequency. In wave pulse welding, cyclically accumulating two separate unit
pulse conditions at low frequency enables to obtain continuous weld bead looking like rows of fish scales.
Aluminum welding makes a ripple bead using an overlap method.
It can also make welding easier, even if there is a gap between weld parts, because it performs a crystal miniaturization
by vibrating the molten pool, and the welded part becomes more resistant to cracking.
The wave pulse welding changes the wire feeding speed and unit pulse condition.
When it close to the limiting value of response characteristics of wire feed motor, it makes the feeding amplitude small
automatically.
When the wave frequency is 3 Hz or more, the amplitude of feeding speed becomes small. At 5 Hz or more, it disappears.
In this case, the wire feeding speed becomes stable and only the unit pulse condition changes.
<Image of welding bead form in the wave frequency>
T I P S
•
This function is available when "DC WAVE PULSE" is selected by the WELDING METHOD
menu.
•
Wave pattern of the welding bead may not appear clearly depending on the temperature
(heat input) during welding.
•
When using hard aluminum or soft aluminum, bead surface may blacken somewhat if short-
circuit occurs frequently during the welding operation.
•
Even if the welding power source is used in Standard mode, a good weld can be obtained by
setting the wave frequency at 5 Hz or more.
•
When welding steel or stainless steel materials in wave pulse welding, it takes time for the
molten metals to coagulate. Since the molten metals will flow during that time, it may not
be possible to make clear weld beads looking like rows of fish scales. Still, the blowholes can
be reduced due to the mixing effect caused by vibration of the molten pool.
1.
Press the WAVE FRQ key.
Wave frequency
Image of welding bead form
Low
High
B
The LED for the WAVE FRQ key lights up.
B
The wave frequency setting value appears on the left
digital meter.
