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Arc welding control method and arc welding device

A technology of arc welding and control method, which is applied in the direction of arc welding equipment, welding equipment, manufacturing tools, etc., and can solve the problems of difficulty in increasing the welding voltage, inability to ensure the same width of weld seam or the same depth of fusion, etc.

Active Publication Date: 2013-08-21
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since it is difficult to increase the welding voltage, there is a problem that it is impossible to ensure the same width of the weld seam or the same depth of welding as conventional ordinary short-circuit welding.

Method used

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  • Arc welding control method and arc welding device
  • Arc welding control method and arc welding device
  • Arc welding control method and arc welding device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0030] figure 1 It represents the wire feed speed, welding current and welding current when the conventional periodic wire feed control is performed when the speed amplitude of the forward feed side and the reverse feed side of the wire feed are equal. A plot of the time waveform of the voltage. figure 2 It is an output waveform chart showing the arc welding control method performed by the arc welding apparatus accompanied with a short circuit in Embodiment 1 of the present invention. figure 2 Time waveforms showing the wire feed speed, welding current, and welding voltage in Embodiment 1 of the present invention. by indicating the existing control with the figure 1 In comparison, the description of the control in the first embodiment will be described. figure 2 Effect.

[0031] figure 1 with figure 2 Indicates the temporal changes of wire feed speed WS, welding voltage V and welding current I.

[0032] figure 1 The wire feed control shown basically proceeds as...

Embodiment approach 2

[0092] Image 6 is the wire feeding speed, welding current and A plot of the time waveform of the welding voltage. Figure 7 It is a diagram showing time waveforms of wire feed speed, welding current, and welding voltage in Embodiment 2 of the present invention. also, Figure 5 It is a figure which shows the schematic structure of the arc welding apparatus in Embodiment 2 of this invention. The second embodiment differs from the first embodiment mainly in that the wire feeding waveform is not a periodic sine wave but a periodic trapezoidal waveform.

[0093] If the basic wire feed speed WS1 is used as the reference and the control of forward feed and reverse feed is repeated periodically at a specified frequency and speed amplitude, even if the waveform of the wire feed is set as a trapezoidal waveform, it can also achieve Same effect as sine wave.

[0094] Image 6 , represents the waveforms of the wire feed speed WS, the welding current I, and the welding voltage V whe...

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PUM

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Abstract

The present invention provides an arc welding control method and an arc welding device. The present invention is consumable electrode-type arc welding for short circuit welding in which short circuiting and arcing are repeated in alternating fashion while a welding wire is automatically fed. Welding wire is repeatedly fed forward and in reverse in periodic fashion at a predetermined frequency and predetermined velocity amplitude with reference to a basic wire feed speed corresponding to the electric current setting, and a short circuit state and an arc state are generated. The welding wire feed speed is controlled so that the feed waveform is different between the forward feed side and reverse feed side of the periodic feeding of welding wire.

Description

technical field [0001] The present invention relates to an arc welding control method and an arc welding apparatus for performing short-circuit welding while continuously feeding a welding wire as a consumable electrode. Background technique [0002] Figure 8 It is a time waveform showing an output of a conventional wire feeding control method for arc welding that periodically feeds a wire and is accompanied by a short circuit. specifically is, Figure 8 Indicates the temporal change of wire feed speed WS, welding current I and welding voltage V. [0003] Such as Figure 8 As shown, the time point P1 represents the time point when the short circuit starts. During the short-circuit period after the time point P1, after the arc welding device outputs the short-circuit initial current for a predetermined time, the first-stage increase slope di / dt of the short-circuit current is output as the welding current I, and then the first-stage increase slope di / dt of the short-circuit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/073B23K9/12
CPCB23K9/124B23K9/092
Inventor 藤原润司川本笃宽古和将
Owner PANASONIC CORP