Control method of digital pulse consumable electrode gas protection welding

A technology of pulse melting electrode and gas shielded welding, which is applied in the direction of manufacturing tools, welding equipment, arc welding equipment, etc., can solve the problems that the closed-loop control of the droplet transfer process cannot be realized, the droplet transfer process has not been realized, and has not yet been discovered. Achieve powerful data processing capabilities, high adjustment accuracy and adjustment sensitivity, and ensure the effect of welding current

Inactive Publication Date: 2007-07-18
SHANGHAI JIAO TONG UNIV +1
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Problems solved by technology

The current control method for pulse MIGA welding only uses a single voltage or current loop to control the above three aspects, and cannot achieve closed-loop control of the droplet transfer process.
[0003] After searching the literature of the prior art, it was found that Wang Weiming published "Full Digital Control System for Pulse Welding" in "Journal of Welding", Volume 25, No. 2, February 2004. The digital controller of pulse current and arc length realizes the control of current and arc length, but it does not control the droplet transfer process of pulse MIGA welding.
In further searches, no literature reports identical to the subject of the present invention have been found

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  • Control method of digital pulse consumable electrode gas protection welding

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Embodiment Construction

[0013] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0014] The surfacing test of low carbon steel plate was carried out with 1.2mm H08Mn2Si welding wire, and the welding voltage target value U ur1 24V, welding current target value U ir 100A. As shown in Figure 1, the target value of the arc voltage U ur Consists of two parts, one of which is U ur1 , the other part is U ur2 ;Target value U of the current ir . The control signal U of the power circuit ct Calculated by the software during the welding process, the arc voltage feedback U uf , the current feedback value U lf It is sent into the DSP through the hard...

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Abstract

The present invention relates to a digital pulsed consumable electrode gas shielded welding control method, belonging to the field of welding technology. It is characterized by that it adopts a cascade-connected three-closed-loop control structure, its internal loop is current loop, second loop is voltage loop and external loop is metal transition loop, every loop is equipped with a regulator, these regulators can be used for respectively controlling impulse current, arc length and metal transition process. Said invention adopts an all-digitalization pulsed consumable electrode gas shielded welding control system made up by using high-speed digital signal processor as kernel control device. Besides, said invention also provides the working principle of said system and its concrete operation method.

Description

technical field [0001] The invention relates to a control method in the field of welding technology, in particular to a digital pulse MIG shielded welding control method. Background technique [0002] Gas metal arc welding (GMAW) is a high-quality, high-efficiency welding process. Pulse gas metal arc welding (GMAW-P) has a wide range of current adjustment, further expanding the welding specification range, and has good protective effect. In order to obtain good welding quality, for pulse MIGA welding, the ideal droplet transfer form is "one pulse, one drop", that is, one droplet is transferred within one pulse period; at the same time, it is necessary to maintain the arc length at an appropriate value ; In addition, it is required to maintain a constant pulse current and base current during pulse and base. The current control method for pulse MIGA welding only uses a single voltage or current loop to control the above three aspects, and cannot achieve closed-loop control o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/095B23K9/10B23K9/09B23K9/173
Inventor 李芳华学明吴毅雄朱芳刘伟耿忠庆左敦桂
Owner SHANGHAI JIAO TONG UNIV
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