Method and system for reducing splash in gas shielded welding of short-circuiting transfer

A technology of gas shielded welding and short-circuit transition, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of difficult current waveform, synchronization, and rapid drop speed of liquid bridge current, and achieve the effect of reducing welding spatter
CN1600486AInactive Publication Date: 2005-03-30TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2005-03-30
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

A method for reducing splash in gas shielded welding of short-circuiting transfer is disclosed. The invention judges a short-circuiting liquid bridge diameter by detecting a resistance change rate of a welding circuit or an impedance change rate of the welding circuit during a welding process, when the short-circuiting liquid bridge diameter is reduced to a predetermined value, a liquid bridge current is rapidly falled by performing flow division control on the short-circuiting liquid bridge current, and the liquid bridge is held in a break state, thereby the short-circuiting liquid bridge is transferred flexibly under a condition of small current, welding splash is reduced. In addition, also disclosed is a system for realizing the method.
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Description

technical field

[0001] The invention relates to a welding method and equipment, in particular to a method for reducing spatter in short-circuit transitional gas shielded welding and a system for realizing the method. Background technique

[0002] Short-circuit transition gas-shielded welding includes gas-shielded welding methods such as carbon dioxide gas-shielded welding, mixed gas shielded welding, and molten electrode argon arc welding. It has the advantages of high productivity, low cost, small welding deformation, wide application range, convenient all-position welding and easy realization of welding automation, etc., and has a wide range of applications in production. The main disadvantage of short-circuit transition gas shielded welding is the large welding spatter. Welding spatter deteriorates production conditions and environment, reduces the utilization rate of welding wire, destroys the stability of arc, and reduces the quality of weld seam.

[0003] The traditi...

Claims

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