Full-digital speed change control method for wire feeding for submerged arc welding

A submerged arc welding and all-digital technology, applied in arc welding equipment, manufacturing tools, welding equipment, etc., can solve problems affecting real-time control accuracy, unable to achieve real-time information collection, real-time information processing, etc., to achieve high control accuracy and The effect of reliability, good stability of control parameters, high adjustment accuracy and adjustment sensitivity

Inactive Publication Date: 2005-07-06
SHANGHAI JIAO TONG UNIV
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AI Technical Summary

Problems solved by technology

However, because the control system still uses a combination of analog and digital control systems, and due to the limitation of single-chip computing speed and data processing capabilities, it is impossible to collect and process a large amount of real-time information, which in turn affects the accuracy of real-time control.

Method used

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  • Full-digital speed change control method for wire feeding for submerged arc welding

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Embodiment Construction

[0013] The following embodiments are provided in conjunction with the accompanying drawings and the technical solutions of the present invention:

[0014] Take φ4.0 HO8MnA welding wire low-carbon steel plate (thickness 12mm) surfacing welding as an example, the characteristic of welding power supply is constant current characteristic, the target value of welding current is 500A, and the target value of arc voltage is 32V. Among them, the arc voltage deviation value Uue, the target value of the rotational speed Unr, the target value of the armature current Uir and the control signal Uct of the power circuit are calculated by software during the welding process, the arc voltage feedback Uuf, the rotational speed feedback value Unf, the armature The current feedback value Uif is sent into the DSP through the hardware circuit, and is calculated by the DSP or converted by the DSP to obtain the corresponding digital quantity. The implementation process is as follows:

[0015] 1. Be...

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Abstract

This invention relates to whole digital buried arc welding varying wire feed control method, which adopts series three-loop control structure with inner one as current ring, second ring as rotary speed ring and outer ring as arc voltage ring with one adjustor in each ring for arc voltage, rotation speed and current. It adopts high speed digit signals processor as central control part to form whole digital DC servo motor control system whose all control strategies area realized by software and the hardware completes digital trigger function and signal process function.

Description

technical field [0001] The invention relates to a variable-speed wire feeding control method for submerged arc welding, in particular to a method for controlling variable-speed wire feeding for submerged arc welding based on a high-speed digital signal processor. It belongs to the field of welding technology. Background technique [0002] Submerged arc automatic welding has the characteristics of high efficiency and high quality. In pressure vessels, petroleum machinery, shipbuilding, and steel, time-varying and uncertain When there is interference, relying on the adjustment function of the arc itself cannot guarantee the stability of sufficient arc length, thus destroying the stability of the welding process, causing welding defects, and affecting the welding quality. Therefore, the arc length is usually restored by forcing the wire feeding speed to be changed, that is, the arc voltage feedback variable speed wire feeding adjustment system is used. The adjustment of the ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/095B23K9/133B23K9/18
Inventor 宋政华学明张勇刘伟李芳赵楠蔡艳
Owner SHANGHAI JIAO TONG UNIV
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