|
Abstract:
On the
basis of the study on are spectral information of droplet transfer in
pulsed MIG welding, the spectral control method of droplet transfer in
pulsed MIG welding is put forward and realized successfully, Experiments
show that droplet transfer keep all to One-peak-zero-base type under
controlling by this method as the welding parameter varies, such as peak
current, base current and pulse frequency, This method has strong
capability to precisely control droplet transfer and therefore it is
very beneficial to making stable welding process and superior welding
quality. It has also many other advantages, such as the strong
interference-resistance, the wide technology scope and the convenient
on-line adjusting property etc. In addition, this method is expected to
be used to control droplet transfer of two-peak-zero-base,
three-peak-zero-base and so on. Thus, a novel method is found for the
automatic control of welding process and welding quality in pulsed MIG
welding. Experiments also show that the converting method at the back of
the spectrum peak is the optimum control tactics. The control system,
principle, control tactics, welding parameters, experimental result and
its analysis of this method are discussed.
Key words:
Pulsed MIG
welding Spectral control method Droplet transfer
One-peak-zero-base Automatic control
CLC No: TG43
国家自然科学基金和天津市自然科学基金资助项目. Received 20001215,
received in revised form 20010424
|