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Arc welding control method

一种控制方法、电弧焊接的技术，应用在电弧焊设备、焊接设备、制造工具等方向，能够解决焊接状态不稳定等问题，达到焊接状态稳定化的效果

Active Publication Date: 2017-03-08
DAIHEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] If the same forward and reverse feed control as in the steady-state welding period is performed during the transition welding period from the start of welding to the convergence to the steady-state welding period, there is a problem that the welding state becomes unstable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[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. An inverter circuit for driving, a high-frequency transformer that steps down high-frequency AC to a voltage suitable for welding, and a secondary rectifier that rectifies t...

Embodiment approach 2

[0103] The invention of Embodiment 2 includes a push side feed motor for performing forward feed feed control in addition to the pull side feed motor for performing forward and reverse feed control of Embodiment 1, and the push side feed motor is controlled from the welding current. Accelerates with a slope during a predetermined acceleration period from the time when energization is started.

[0104] Figure 4 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 4 with the above figure 1 Correspondingly, mark the same blocks with the same symbols and their descriptions will not be repeated. Figure 4 exist figure 1 On the basis of the push side feed motor WM2, the acceleration period setting circuit TUR, the second feed speed setting circuit FR2 and the second feed control circuit FC2 are added. The following reference Figure 4 to illustrate these blocks.

[0105] The...

Embodiment approach 3

[0117] The invention of Embodiment 3 is in Embodiment 1 figure 2 The same operation during the transition welding period, image 3 Actions during steady-state welding in different scenarios. That is, in the invention of Embodiment 1, the waveform of the feed speed becomes a given type during the steady-state welding period, and the absence of an arc and the occurrence of a short circuit are triggered to switch between the forward feed period and the reverse feed of the feed speed. situation during the period. On the other hand, in the invention of Embodiment 3, the forward feed period and the reverse feed period of the feed speed are switched between the steady state welding period and the arc generation and the occurrence of a short circuit as triggers as in the transition welding period. .

[0118] Figure 6 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. Figure 6 with ...

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Abstract

Provided is an arc welding control method that carries out forward-reverse feed control alternately switching a welding wire feed rate (Fw) between a forward feed period and a reverse feed period and performs welding by generating a short period and an arc period, wherein during a transient welding period (Tk), a transition to the forward feed period occurs when the arc period comes during the reverse feed period and a transition to the reverse feed period occurs when the short period comes during the forward feed period, and during a steady welding period, switching is carried out alternately between a prescribed forward feed period and a prescribed reverse feed period. Thus, because forward-reverse feed control that differs from that during the steady welding period is carried out during the transient welding period (Tk), the welding state during the transient welding period (Tk) can be stabilized.

Description

technical field [0001] The invention relates to an arc welding control method, which alternately switches the feed speed of the welding wire to forward and reverse feed control during the forward feed period and the reverse feed period to generate a short circuit period and an arc period, thereby performing welding. 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 where short-circuit periods and arc periods are repeated alternately. [0003] In order to further improve the welding quality, a method of welding is proposed by periodically repeating forward and reverse feeding of the welding wire (for example, refer to Patent Document 1). [0004] In the invention of Patent Document 1, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/073B23K9/00B23K9/12
CPCB23K9/0671B23K9/073B23K9/091B23K9/124B23K9/173B23K9/095B23K9/00B23K9/12B23K9/125
Inventor 井手章博
Owner DAIHEN CORP
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