가스 메탈 아크 용접에서 단락현상 모델링 및 스패터 감소를 위한 전류파형 선정에 관한 연구A Study on Modeling of Short-Circuliting Phenomena and Selection of Current Waveform for Reduction of Spatter in GMAW

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 546
  • Download : 0
With an expansion in automation of welding processes, emphasis has been shifted from other welding processes to the GMA welding. However, there is a problem with this process that the spatter occurs very frequently. In GMA welding, there are several types in the way of metal transfer from the electrode wire to the weld pool, which have a close relatonship with the spatter genetration. This study was concerned with the spatter occurring in the short-circuiting transfer. In welding with short-circuiting, the electromagnetic force formed by the welding current facilitatics the rupture of the metal bridge between the wire and workpiece and ensures the normal process of the welding process. However, the spatter can be genetrated from the droplet because of the upward magnetic force, when the droplet contacts with the weld pool. The passage of current through the bridge results in the accumulation of the thermal energy, which causes the bridge to explode in the final stage of short-circuiting, thus forming the spatter. Based on the above phenomena in conjunction with other experimental results published, the physical phenomenon related with the occurrence of spatter was modeled and the current waveform was investigated to reduce the spatter. Finally, the fuzzy rule based method was proposed to predict the time of short-circuiting and arcing in the metal transfer.
Publisher
대한용접·접합학회
Issue Date
1996-02
Language
Korean
Citation

대한용접·접합학회지, v.14, no.1, pp.57 - 67

ISSN
1225-6153
URI
http://hdl.handle.net/10203/76682
Appears in Collection
ME-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0