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Method and device for stabilizing arc length

An arc and arc length technology, applied in arc welding equipment, manufacturing tools, welding equipment, etc., can solve the problems of poor gas shielding effect, no suitable arc, and dark appearance of weld bead, so as to prevent overheating and reduce heat input The effect of stable volume and arc length

Active Publication Date: 2020-08-21
PANASONIC WELDING SYST TANGSHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the arc becomes longer, the gas shielding effect becomes worse, the appearance of the weld bead becomes darker and porosity occurs, and the weld shape becomes worse
[0003] Based on the above welding change process, it can be concluded that the state of the arc directly determines the heating of the molten pool and the base metal or the workpiece. When the arc is stable, the welding process will be stable, and the stability of the arc is mainly the arc length. Controlling the arc length does not change will not lead to changes in the molten pool, and the weld shape will not be affected. However, there is currently no suitable method and device to stabilize the arc length.

Method used

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  • Method and device for stabilizing arc length
  • Method and device for stabilizing arc length

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0053] In this example embodiment, the wire feeding speed or the set voltage is adjusted mainly according to the difference between the peak value of the real-time voltage and the peak value of the set voltage.

[0054] The main process is as follows: firstly, the adjusted wire feeding speed and the adjusted welding speed after adjusting the set voltage are calculated according to the difference between the peak value of the real-time voltage and the peak value of the set voltage.

[0055] The adjusted wire feeding speed calculated according to the difference between the peak value of the real-time voltage and the peak value of the set voltage is:

[0056] MSPD'=MSPD-(IPV'-IPV std )Kp 1 ,

[0057] In the formula, MSPD' is the wire feeding speed after adjustment, MSPD is the wire feeding speed before adjustment, IPV' is the peak value of real-time voltage, IPV std is the peak value of the set voltage, Kp 1 is a coefficient, and its value is a positive number, which can be a...

Embodiment approach 2

[0066] In this example embodiment, the wire feed speed, set voltage or welding speed is adjusted mainly based on the difference between the pulse base value of the real-time voltage and the pulse base value of the set voltage.

[0067] The main process is as follows: firstly, the adjusted wire feeding speed, the adjusted set voltage and the adjusted welding speed are calculated according to the difference between the pulse base value of the real-time voltage and the pulse base value of the set voltage. speed.

[0068] The adjusted wire feeding speed calculated according to the difference between the pulse base value of the real-time voltage and the pulse base value of the set voltage is:

[0069] MSPD'=MSPD+(IBV'-IBV std )Kp 3 ,

[0070] In the formula, MSPD' is the wire feeding speed after adjustment, MSPD is the wire feeding speed before adjustment, IBV' is the pulse base value of real-time voltage, IBV std is the pulse base value of the set voltage, Kp 3 is a coefficie...

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Abstract

The invention relates to the field of welding technology, and proposes a method for stabilizing the arc length of an electric arc. The method for stabilizing the arc length of the arc includes: detecting the real-time voltage during welding; The difference from the set voltage adjusts the wire feed speed or the set voltage. When there is a deviation between the real-time voltage and the set voltage, it is considered that the current molten pool has a tendency to overheat, and the state of the arc has changed. By adjusting the wire feeding speed or the set voltage, the heat input is reduced and the arc length of the arc is controlled. Stable, the molten pool is stable, thereby preventing the occurrence of overheating and ensuring the consistency of weld formation.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a method for stabilizing the arc length of an arc and a device for stabilizing the arc length of the arc. Background technique [0002] During the welding process, it is often encountered that with continuous welding for a long time, especially when welding metal materials such as aluminum alloys with good thermal and electrical conductivity, the state of the molten pool and the state of the base metal or workpiece will be caused by excessive heat input. The state of the arc changes, mainly as follows: the molten pool collapses, the area of ​​the molten pool increases, the weld becomes wider and wider, and the arc becomes longer and longer. refer to figure 1 The comparison diagram of the weld seam before and after overheating is shown, the solid line part in the figure is the weld seam formed after overheating, and the dotted line part is the weld seam formed before overheating...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/073
CPCB23K9/0735
Inventor 安小东孙永涛王新
Owner PANASONIC WELDING SYST TANGSHAN
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