Arc start control method in consumable electrode arc welding

A technology of arc welding and melting electrodes, which is applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve problems such as prone to deposition, and achieve the effects of arc ignition, high-quality arc ignition, and suppression of instantaneous arc

Active Publication Date: 2008-06-25
DAIHEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Not all the generation of instantaneous arc will lead to welding, but it must be a state that is prone to welding

Method used

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  • Arc start control method in consumable electrode arc welding
  • Arc start control method in consumable electrode arc welding
  • Arc start control method in consumable electrode arc welding

Examples

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Embodiment Construction

[0033] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0034] FIG. 1 is a block diagram of a welding power source PS for implementing an arc ignition control method related to molten electrode arc welding according to an embodiment of the present invention. As a welding apparatus, it is the same as that of FIG. 4 mentioned above, but the welding power supply PS is replaced with the welding power supply of this figure. Hereinafter, each functional block will be described with reference to this figure.

[0035]The voltage setting circuit VR outputs a predetermined voltage setting signal Vr. The initial current setting circuit IS outputs a predetermined initial current setting signal Isr. The power supply main circuit PM takes commercial power such as three-phase 200V as input, and performs output control such as inverter control based on the voltage setting signal Vr when the start signal St is at a high level, and outputs ...

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Abstract

An arc start control method is provided for consumable electrode arc welding. According to this method, a welding wire (1), supplied through a welding torch (4), is brought into contact with a work (2) and an initial current is applied to the welding wire (1) (at time t2) and the work (2) that are held in contact with each other (at time t3). Then, an initial arc is generated by moving the welding wire (1) away from the work (2) with the application of the initial current maintained, and thereafter the initial arc is changed to a steady arc, wherein the initial current is increased gradually with a predetermined increase rate (at time t4). Thus when the welding starts, the welding wire (1) is temporarily contacted to the work (2) then separated from the same, in the contraction arc guide method generating arc to guide arc, arc guide badness on the work (20) to be welded coated by the welding wire (1) can be restrained.

Description

technical field [0001] The present invention relates to an arc start control method for melting electrode arc welding, which is used for arc start after the welding wire temporarily touches the object to be welded and then separates. Background technique [0002] In the past, the arc ignition control method of molten electrode arc welding has been conventionally used. At the start of welding of molten electrode arc welding, the welding wire fed from the welding torch is brought into contact with the object to be welded, the initial current is applied, and then the welding wire is separated from the object to be welded. On the other hand, after the initial arc is generated, it transitions to a stable arc (hereinafter referred to as the contraction arc ignition method). Compared with the usual arc ignition method, this contraction arc ignition method has a lower probability of arc ignition failure, less spatter during arc ignition, excellent transition response to a stable arc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/067B23K9/173
CPCB23K9/0732B23K9/0671
Inventor 上园敏郎
Owner DAIHEN CORP
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