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Fuzzy control method for cooperating type CO2 welding circuit-shorting transition and welding machine thereof

A technology of short-circuit transition and fuzzy control, applied in the direction of manufacturing tools, welding equipment, arc welding equipment, etc., can solve the problems of poor anti-interference ability, complicated operation, inability to adapt to disturbance, etc., and achieve strong anti-interference ability, simple operation process, Wide range of effects

Inactive Publication Date: 2003-07-09
BEIJING UNIV OF TECH +1
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AI Technical Summary

Problems solved by technology

Although this can overcome the problem of poor parameter matching accuracy, it makes the operation more complicated
[0004] 2) The anti-interference ability of the welding process is poor
That is, once the welding specification parameters are determined, they will not change during the welding process, and it cannot adapt to the disturbance of the welding process when the external conditions change

Method used

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  • Fuzzy control method for cooperating type CO2 welding circuit-shorting transition and welding machine thereof
  • Fuzzy control method for cooperating type CO2 welding circuit-shorting transition and welding machine thereof
  • Fuzzy control method for cooperating type CO2 welding circuit-shorting transition and welding machine thereof

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Embodiment

[0029] like image 3As shown, a welding machine according to a specific embodiment of the present invention is mainly composed of three parts structurally: welding power supply main circuit A, wire feeding circuit C and control circuit B with 8098 single-chip microcomputer as the control center. Among them, the main circuit A of the welding power supply adopts a full-bridge inverter circuit with IGBT as the power switching device, which is mainly composed of a rectifier circuit 1, a filter circuit 2, a switching power device (IGBT) 3, an intermediate frequency transformer 4, a secondary rectifier circuit 5, The filter inductor 6 is formed, and its working principle is as follows: After the three-phase AC 380V power supply passes through the rectifier circuit 1 and the filter circuit 2, a 540V direct current is obtained at the output end of the filter circuit 2, and then converted into a frequency of about 20KHz by the switching power device 3 intermediate frequency alternating...

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Abstract

The present invention relates to a fuzzy control method for CO2 short-circuiting transfer welding and its welding machine. It is characterized by that it adopts a closed-loop control method combining parameters-matched coordinate control and parameters-regulated fuzzy control, on the basis of the real-time detection on short circuiting transfer frequiency of reflecting stability of welding process, according to the coordinate relationship between all welding parameters and short circuiting transfer frequencies, it makes fuzzy treatment to detected data to define the regulating quantity of all parameters to make real-time regulation to make short circuiting transfer frequency keep stable in a certain range to ensure the optimum matching relationship between all parameters. Said invention possesses the advantages of good parameter matching property, strong anti-interference capacity and stable welding course.

Description

technical field [0001] A synergistic CO 2 The invention relates to a welding short-circuit transition fuzzy control method and a welding machine, which belong to the field of welding process and automatic control devices. Background technique [0002] CO 2 As a high-efficiency and energy-saving welding method, welding has been widely used and developed in industrial production, especially in the form of short-circuit transition, which can be conveniently applied in all-position welding and thin plate welding. However, due to the inherent characteristics of short-circuit transition welding, it also causes the disadvantages of large spatter and poor forming during the welding process, especially when the specification is above the middle level, these shortcomings are particularly prominent. Experiments show that whether the matching of welding specification parameters is reasonable or not is directly related to the size of spatter in the welding process and the quality of we...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/173
Inventor 殷树言李西恭卢振洋王军段红海
Owner BEIJING UNIV OF TECH
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