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Pulsed arc welding method of carbon oxide

A technology of carbon dioxide and pulsed arc, applied in the direction of arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problem of excessive sputtering, achieve the effect of improving the appearance of the weld bead, suppressing sputtering, and reducing the occurrence of sputtering

Active Publication Date: 2015-01-21
DAIHEN CORP
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Problems solved by technology

Moreover, since the timing of the short circuit is random, the size of the droplet also has various sizes. Due to the irregular droplet transition state, there are more large-grained sputters.

Method used

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  • Pulsed arc welding method of carbon oxide
  • Pulsed arc welding method of carbon oxide
  • Pulsed arc welding method of carbon oxide

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Embodiment Construction

[0036] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0037] figure 1 It is a current-voltage waveform diagram showing the carbon dioxide pulse arc welding method according to the embodiment of the present invention. The graph (A) shows the temporal change of the welding current Iw, and the graph (B) shows the temporal change of the welding voltage Vw. This figure shows the case of a carbon dioxide pulse arc welding method using a shielding gas mainly composed of carbon dioxide. Hereinafter, description will be made with reference to this figure.

[0038] In the carbon dioxide pulse arc welding method according to the embodiment of the present invention, the pulse period Tpb at times t1 to t3 is formed of two periods. The first period is the base period Tb from time t1 to t2, and the second period is the peak period Tp from time t2 to t3. Therefore, welding is repeated with the base period Tb and the peak period Tp as...

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Abstract

The present invention provides a pulsed arc welding method of carbon oxide. A peak period (Tp) of a peak current flow (Ip) and a reference period (Tb) of a reference current flow (Tp) are used as one pulse period (Tpb) for welding repeatedly. The peak current (Ip) is vibrated through an amplitude (Ws) and a vibration period (Ts) in a peak period (Tp) for forming a molten drop at a front end of a welding wire. In the reference period (Tb), the formed molten drop smoothly transits to a molten pool through short circuiting transfer. Therefore, short circuiting transfer is performed to the molten drop formed in the peak period (Tp) is performed in the reference period (Tb). Therefore one molten drop transition state in one pulse period can be realized. Therefore the welding with little splash can be performed. Therefore in the electrode fused pulsed arc welding of carbon oxide, the formation and release state of the molten drop are stabilized, and high-quality welding with little splash can be performed.

Description

technical field [0001] The present invention relates to a carbon dioxide pulse arc welding method for performing stable droplet transfer in molten electrode type pulse arc welding using a shielding gas mainly composed of carbon dioxide. Background technique [0002] The melting electrode pulse arc welding using a shielding gas mainly composed of argon is widely used. As the shielding gas mainly composed of argon, use 20 vol% carbon dioxide + 80 vol% argon when the base material is iron and steel (active gas shielded pulse welding, Magpalus welding), and use 100 vol when the base material is aluminum % argon (inert gas shielded pulse welding, Migpalus welding). In the pulsed arc welding using such argon as the main component of the shielding gas, since the droplet transfer is in a jet transfer state that is carried out periodically and stably as fine particles as the diameter of the welding wire, it is possible to perform sputtering with less generation. of good soldering. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/09B23K9/095
Inventor 西坂太志惠良哲生松下和宪
Owner DAIHEN CORP
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