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A method for monitoring arc length based on arc acoustic signal sensing

A sonic signal and arc technology, applied in arc welding equipment, manufacturing tools, welding equipment, etc., can solve problems affecting the effective energy of arc heat sources, restricting the quality of welding or additive manufacturing, etc., and achieve offline detection and online monitoring and monitoring The result is intuitive and the effect of data calculation is small

Active Publication Date: 2018-03-13
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the processing, the change of the arc length will affect the effective energy of the arc heat source acting on the processing object. Due to the change of the arc length, the arc heat source energy acts on the manufacturing area, and the arc ignition and droplet transfer stability will be extremely changed. Earth constraints welding or additive manufacturing quality improvement

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  • A method for monitoring arc length based on arc acoustic signal sensing
  • A method for monitoring arc length based on arc acoustic signal sensing
  • A method for monitoring arc length based on arc acoustic signal sensing

Examples

Experimental program
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Effect test

Embodiment 1

[0049] For MIG welding, a 6061 aluminum alloy plate with a thickness of 6mm is used as the substrate, and a 4043 aluminum alloy welding wire with a diameter of 1.2mm is used as the metal welding wire. The shielding gas is high-purity argon with a purity of 99.999%, and the flow rate of the shielding gas is 18L / min. First establish the mathematical model of the arc length: set the arc current output as 120A, the arc voltage output as 18.2V, the arc pulse frequency as 100Hz, and the moving speed of the traveling mechanism as 30mm / s. The aluminum alloy welding wire used is connected to the positive pole of the power supply, and the substrate is connected to the negative pole of the power supply. Install the base plate and fix it reliably horizontally, and clamp the MIG arc welding torch to the traveling mechanism of the 3D CNC work platform. Orient the MIG torch so that it is perpendicular to the plane of the substrate. Install the acoustic wave sensor above the arc side, set th...

Embodiment 2

[0053] For MIG welding, a 6061 aluminum alloy plate with a thickness of 6mm is used as the substrate, and a 4043 aluminum alloy welding wire with a diameter of 1.2mm is used as the metal welding wire. The shielding gas is high-purity argon with a purity of 99.999%, and the flow rate of the shielding gas is 18L / min. First establish the mathematical model of the arc length: set the arc current output to 115A, the arc voltage output to 17.6V, the arc pulse frequency to 100Hz, and the traveling speed to 30mm / s. The aluminum alloy welding wire used is connected to the positive pole of the power supply, and the substrate is connected to the negative pole of the power supply. Install the base plate and fix it reliably horizontally, and clamp the MIG arc welding torch to the traveling mechanism of the 3D CNC work platform. Orient the MIG torch so that it is perpendicular to the plane of the substrate. Install the acoustic wave sensor above the arc side, set the walking speed along th...

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Abstract

The invention discloses a method for sensing and monitoring the arc length of an electric arc based on electric arc sound wave signals. According to the method, by detecting the electric arc sound wave signal wave shape generated in the electric arc welding or electric arc additive material manufacturing process in real time, the time-domain signal wave shape higher than an electric arc wound wave signal amplitude threshold value is extracted to obtain the electric arc sound wave signal time-domain feature wave shape, wavelet analysis is utilized for eliminating noise, low-frequency ingredients in the electric arc sound wave signal time-domain feature wave shape are extracted, a time-domain feature wave shape picture is drawn, the electric arc sound wave signal low-frequency ingredient time-domain feature wave shape is brought in an electric arc length mathematical model to calculate and obtain the electric arc length change time-domain wave shape in the machining process, and by means of the electric arc length change time-domain wave shape, the electric arc length value at any machining moment in the machining process is obtained. By the utilization of the method, off-line detection and online detection of the electric arc length in the TIG, MIG, MAG and PAW electric arc welding process and the metal material electric arc additional material manufacturing process can be achieved.

Description

technical field [0001] The invention relates to a method for monitoring arc length based on arc acoustic signal sensing, which is not only suitable for monitoring the arc length in TIG, MIG, MAG, PAW and other arc welding processes, but also suitable for arc surfacing welding of metal materials , arc welding and arc three-dimensional rapid prototyping, etc., to monitor the arc length in the process of arc additive manufacturing. Background technique [0002] Using an arc as a heat source, arc welding and arc additive manufacturing of various metal material structures can be performed. Under the situation of rapid development of intelligent manufacturing technology, weld penetration control and arc tracking technology in the process of arc welding and arc additive manufacturing are very meaningful research topics in the field of robotic manufacturing automation. In order to obtain good weld formation quality or additive manufacturing deposit quality, it is necessary to obtai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/095
CPCB23K9/0956
Inventor 罗怡张成洋朱亮韩静韬熊伟王子琪蒋志高
Owner CHONGQING UNIV OF TECH