Automatic stability detecting method for process of CO2 electric arc welding short circuit transition welding

A short-circuit transition welding and automatic detection technology, which is applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of lack of theoretical explanation support and scientificity that needs further verification

Inactive Publication Date: 2013-10-23
GUANGZHOU UNIVERSITY OF CHINESE MEDICINE
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Problems solved by technology

However, this method is based on limited experiments and lacks reasonable the

Method used

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  • Automatic stability detecting method for process of CO2 electric arc welding short circuit transition welding
  • Automatic stability detecting method for process of CO2 electric arc welding short circuit transition welding
  • Automatic stability detecting method for process of CO2 electric arc welding short circuit transition welding

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Embodiment 1

[0058] CO in this example 2 The automatic detection method for the stability of the arc welding short-circuit transition welding process adopts a test platform including an industrial computer, an arc welding process detector, a welding wire conveying mechanism, a walking trolley, a guide rail and an oscilloscope, and the arc welding process detector includes a voltage sensor and a current sensor , the voltage sensor used is a voltage divider, and the current sensor used is a Hall current sensor. During the test, the welding equipment adopts the plate surfacing welding method with the test piece as the Q235 steel plate, the welding speed is 400mm / min, CO 2 The gas flow rate is 16L / min, the diameter of the welding wire is 1.2mm, and the extension length of the welding wire is 12mm.

[0059] Such as figure 1 As shown, the CO of this example 2 The automatic detection method for the stability of arc welding short-circuit transition welding process comprises the following steps:...

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Abstract

The invention discloses an automatic stability detecting method for the process of CO2 electric arc welding short circuit transition welding, which comprises the following steps: collecting the arc voltage value and the welding current value in the CO2 electric arc welding short circuit transition welding process, and storing the arc voltage value and the welding current value as a signal sample; performing cycle phase judgment to the voltage value of each signal point in the signal sample; counting the short circuit time in the signal sample, computing and obtaining the frequency distribution value of short circuit time through segmenting 5-10,000 inter-cells; setting 3-1,000 frequency distribution accumulation values, and detecting the time range meeting each frequency distribution accumulation value; getting normal distribution standard deviation, so as to obtain and take the average value of the peak value of a normality probability density function as the stability index in the CO2 electric arc welding short circuit transition welding process; sending an alarm signal when the stability index is smaller than the stability threshold value. The stability detecting method provided by the invention has the characteristics of objectification and quantification, can be realized by adopting a testing platform with a simple structure only, and has strong practicability.

Description

technical field [0001] The present invention relates to a CO 2 An automatic detection method for arc welding, especially a CO 2 An automatic detection method for the stability of arc welding short-circuit transition welding process, which belongs to CO 2 Arc welding detection field. Background technique [0002] For a long time, CO 2 The stability of arc welding is comprehensively evaluated by experienced welders based on factors such as arc light, arc sound, and spatter. This method has a large personal subjective component, and the judgment speed is slow, so it has not been promoted. [0003] In recent years, many experts and scholars at home and abroad have tried to study CO from voltage and current signals. 2 Stability evaluation method for arc welding. For example, in 2000, Zhou Kaiqing and other application programming language Visual C++ researched and developed an arc welding machine and arc parameter testing system. In addition to providing voltage and current...

Claims

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Application Information

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IPC IPC(8): B23K9/095
Inventor 高理文
Owner GUANGZHOU UNIVERSITY OF CHINESE MEDICINE
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