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Power supply device for arc welding and control method for power supply device for arc welding

An arc welding and power supply device technology, applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of reduced welding performance, hindered welding continuity, etc., and achieve good arc welding effect.

Active Publication Date: 2017-08-15
DAIHEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the feeding speed of the welding wire is not appropriately adjusted in accordance with the change in the distance between the tip base metals as described above, the welding performance may be reduced or the continuity of welding may be hindered depending on the situation.

Method used

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  • Power supply device for arc welding and control method for power supply device for arc welding
  • Power supply device for arc welding and control method for power supply device for arc welding
  • Power supply device for arc welding and control method for power supply device for arc welding

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no. 1 Embodiment approach

[0043] Hereinafter, a first embodiment of a power supply device for arc welding and a control method of the power supply device for arc welding will be described.

[0044] Such as figure 1 As shown, the arc welding machine 10 is provided with: an arc welding power supply device 11 that generates output power suitable for arc welding; and a welding torch 13 for supplying and maintaining power to the welding wire 12 as a discharge electrode that generates an arc; A feeding device 14 for feeding the welding wire 12; and a wire holder 15 for winding the welding wire 12.

[0045] The welding torch 13 is connected to the power supply device 11 via a cable 16 and receives power from the power supply device 11. The welding torch 13 includes a power supply terminal 13 a that supplies power to the welding wire 12. The power supply terminal 13 a allows the feeding action of the welding wire 12 and performs electrical contact that should supply the output power generated by the power supply d...

no. 2 Embodiment approach

[0075] Hereinafter, a second embodiment of a power supply device for arc welding and a control method of the power supply device for arc welding will be described.

[0076] In the present embodiment, the control method of the feed control unit 20c of the control circuit 20 is different from the previous first embodiment. In the first embodiment, the phase adjustment (fixed amplitude) of the feed speed Vft of the welding wire 12 on the variation curve Xa is performed, while the present embodiment is the following control method: the feed speed Vft of the welding wire 12 is adjusted on the variation curve Xa. Amplitude adjustment (fixed phase).

[0077] "The case where the distance L between the base materials of the ends extends"

[0078] Such as Figure 4 As shown, when the deviation between the actual time t3a and the original time t3 when switching to the short-circuit period Ts exceeds the allowable range, and the actual time t3a is slower than the original time t3, the synchroni...

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Abstract

The invention provides a power supply device, which appropriately controls a feed speed of a welding wire to perform arc welding, for the arc welding and a control method of the power supply device for the arc welding. As feed control of the welding wire (12), the feed speed (Vft) of the welding wire (12) is changed periodically, so, when the welding wire (12) is in positive feed and the feed speed (Vft) is in a speed reduction area of a change curve, the feed control is switched to a short-circuit period, and adjustments of the feed speed (Vft) of the welding wire (12) are performed in the speed reduction area. If a judgment of a feed speed synchronization error representing that the feed speed (Vft) of the welding wire (12) is slow is completed, acceleration control comprising temporary acceleration is implemented; and, if a judgment of a feed speed synchronization error representing that the feed speed (Vft) of the welding wire (12) is fast is completed, speed reduction control enabling the feed speed to be further reduced is implemented.

Description

Technical field [0001] The present invention relates to a power supply device for consumable electrode arc welding and a control method of the power supply device for consumable electrode arc welding. Background technique [0002] In consumable electrode arc welding, an arc is generated from the electrode tip that uses a welding wire as a discharge electrode to weld the to-be-welded object (base metal). However, at this time, the welding wire is consumed due to the arc. The welding is performed while feeding the welding wire correspondingly. In addition, in this consumable electrode arc welding, the short-circuit period in which the welding wire contacts the object to be welded and the arc period in which the welding wire is separated from the object to be welded are alternately generated. However, in order to properly perform arc welding, the following In each period, advancement (forward feed) and retreat (reverse feed) of the welding wire are repeated (for example, refer to P...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/10B23K9/095
CPCB23K9/095B23K9/1006B23K9/073B23K9/09B23K9/0956B23K9/124
Inventor 田中利幸
Owner DAIHEN CORP
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