Resistance Welding is one kind
of welding technology which melt the metal material by the
resistance heating energy which is generated by the welding
current passing the workpiece itself. Therefore by increase or
adjusting the welding current frequency, it can change and
improve the welding quality.
Just basing on this theory, we
develop the Middle Frequency Inverter DC Welding Machine, its
welding current frequency increase to ***0HZ from common *0HZ
or *0HZ.The controlling time precision is much higher, the
power factor is more than *8%,without eddy current
electromagnetic induction interference, the welding quality is
also improved a lot.
While not for all the workpiece,
the current optimum value is all same as ***0HZ,some need
bigger welding frequency, others need less, just because this
reason, basing on the Middle Frequency Welding Technology, we
also develop VF Series Variable Frequency Welding Machine which
welding frequency is adjustable. The principle is that by the
added a IGBT pulse width adjustable "Welding Controller" and
the output voltage of V and transformer turns N all adjustable
"Welding Transformer" to fulfill the function of adjustable
frequency.
However, these two kinds of
welding methods both cannot adjust welding current value of
each welding automatically according to the subtle changes of
workpiece.In order to meet much higher
request to welding quality, such as for the automotive,
aircraft and other high-end products, we develop one kind of
“Dynamic Resistance Principle Middle Frequency Self Auto
Adaptive Control System”. It can install to both MF and VF
Welder, by this way they can adjust the welding current
automatically basing different product. This system is based on
the constant current mode control technique, according to the
workpiece thickness, different dirt surface of workpiece and
the corrosion degree, current shunt, the operator’s individual
difference factors, such as the subtle changes and solder
joints, it can automatically adjust welding current during the
welding process of each welding spot, ensure the altitudinal
consistency of the welding quality and
effect.
Middle Frequency and Variable
Frequency Welder are both powered by three-phase power, compared to
the traditional AC welder two-phase power supply, will not cause
the fluctuation of power supply, also can adapt suddenly lifting
voltage strongly. Current output is also more accurate, more
stable, more energy and more efficient.
These kinds of higher technology
is specially suitable for welding higher conductive rate of
material, such as aluminum, copper, silver, and so on. Also
good at welding much more thicker work piece, automobile,
aerospace, and other high request products and
industry.
