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Arc welding control method

A control method and arc welding technology, applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve problems such as timing deviation, and achieve the effect of stabilizing the welding state and maintaining the welding state

Active Publication Date: 2018-05-01
DAIHEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The timing of such a short circuit has some degree of deviation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0031] The invention of Embodiment 1 sets the cycle and / or amplitude of the feed rate based on the welding speed.

[0032] figure 1 It is a block diagram of a welding power source for implementing the arc welding control method according to Embodiment 1 of the present invention. The following reference figure 1 to illustrate the blocks.

[0033] The power supply main circuit PM receives a commercial power supply (not shown) such as 3-phase 200V as input, performs output control by inverter control or the like in accordance with a drive signal Dv described later, and outputs an output voltage E. Although not shown in the figure, this power supply main circuit PM includes: a primary rectifier for rectifying a commercial power supply; a smoothing capacitor for smoothing the rectified direct current; and the aforementioned drive signal Dv for converting the smoothed direct current into a high-frequency alternating current. The drive inverter circuit; the high-frequency transf...

Embodiment approach 2

[0049] In the invention of Embodiment 2, the cycle and / or amplitude of the feed rate are set based on the welding wire deposition amount per unit welding length.

[0050] Assuming that the radius of the welding wire is d (mm), the average feed speed setting signal Far (mm / min) and the welding speed setting signal Wsr (mm / min) are input, and the welding length per unit can be calculated by the following formula The amount of welding wire deposition Md (mm 3 / mm).

[0051] Md=π·d 2 ·Far / Wsr…(1) type

[0052] figure 2 It is a block diagram of a welding power source for implementing the arc welding control method according to Embodiment 2 of the present invention. figure 2 with the above figure 1 Correspondingly, attach the same label to the same block, and do not repeat their descriptions. figure 2 exist figure 1 On the basis of the welding wire radius setting circuit DR and the welding wire deposition amount calculation circuit MD per unit welding length are added, t...

Embodiment approach 3

[0060] The invention of Embodiment 3 controls the feed speed based on Embodiment 1 or 2 so that even if the amplitude (amplitude setting signal Wfr) changes, the average value of the feed speed becomes constant.

[0061] image 3 It is a block diagram of a welding power source for implementing the arc welding control method according to Embodiment 3 of the present invention. image 3 with the above figure 1 Correspondingly, attach the same label to the same block, and do not repeat their descriptions. image 3 exist figure 1 On the basis of adding the average feed speed calculation circuit FAD and the feed error amplifier circuit EF, the figure 1 The forward feed side shift amount setting circuit SFR is replaced by the second forward feed side shift amount setting circuit SFR2. The following reference image 3 Describe these blocks.

[0062] The average feed speed calculation circuit FAD receives the feed speed setting signal Fr as input, calculates the average feed s...

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Abstract

The stability of the arc welding in which forward feeding and reverse feeding of the welding wire (1) are periodically repeated is improved. Welding is performed by repeating the forward feed and reverse feed of the feed speed (Fw) of the welding wire (1) at a given cycle (Tf) and given amplitude (Wf) to generate a short circuit period and an arc period In the arc welding control method, the period (Tf) of the feed speed (Fw) is automatically set based on the average feed speed (Far) and the welding speed (Wsr), or the welding wire deposition amount (Md) per unit welding length and / or amplitude (Wf). Furthermore, when the amplitude (Wf) changes, feedback control is performed on the forward feed side shift amount (Sf) so that the average value of the feed speed (Fw) becomes constant. Thereby, since the period (Tf) and amplitude (Wf) of a feed rate (Fw) are always set to an appropriate value, a stable welding state can be maintained.

Description

technical field [0001] The present invention relates to an arc welding control method for performing welding by repeating forward feeding and reverse feeding of a welding wire feeding speed with a given cycle and a given amplitude to generate a short circuit period and an arc period. Background technique [0002] In general consumable-electrode arc welding, a welding wire serving as a consumable electrode is fed at a constant speed, and an arc is generated between the welding wire and a base material to perform welding. In consumable-electrode arc welding, the welding wire and the base metal are often in a welding state in which short-circuit periods and arc periods are alternately repeated. [0003] In order to further improve the welding quality, a method of welding is proposed by periodically repeating forward feeding and reverse feeding of a welding wire (for example, refer to Patent Document 1). This welding method will be described below. [0004] Figure 4 It is a w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/073B23K9/12
CPCB23K9/073B23K9/173B23K9/092B23K9/093B23K9/124B23K9/09B23K9/12B23K9/125
Inventor 井手章博
Owner DAIHEN CORP
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