Self-adaptive resistance spot welding quality detection, control method and system
A technology of resistance spot welding and control method, which is applied in the direction of analyzing materials, using sound waves/ultrasonic waves/infrasonic waves to analyze solids, instruments, etc., and can solve problems such as unfused, dual-phase steel spatter, and deep indentation
Active Publication Date: 2018-10-26
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
However, duplex steel is prone to internal defects such as spatter, shrinkage cavity and cracks during spot welding; when the welding process parameters are improper, problems such as lack of fusion, deep indentation, warpage between plates, surface cracks, etc. will also occur
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[0014] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0015] For the self-adaptive resistance spot welding quality detection and control method provided by the present invention in detail, figure 1 It shows the flow of the adaptive resistance spot welding quality detection and control method according to the embodiment of the present invention.
[0016] Such as figure 1 As shown, the self-adaptive resistance spot welding quality detection provided by the invention, control method comprise:
[0017] S110: constructing a basic knowledge base for adjusting welding process parameters, where the welding process parameters include electrode pressure, current and energization time.
[0018] Among them, in the process of constructing the basic knowledge base for adjusting welding process parameters, the basic knowledge base for adjusting welding process parameters is constructed by collecting welding e...
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The invention provides a self-adaptive resistance spot-welding quality detection and control method and a self-adaptive resistance spot-welding quality detection and control system. The method is characterized by comprising the following steps of: constructing a basis knowledge base for regulating welding process parameters and a spot-welding quality detection knowledge base; scanning a welding spot through an ultrasonic probe in the process of performing the resistance spot-welding to collect the welding process parameters corresponding to the welding spot in real time, and acquiring an ultrasonic signal of the welding spot and a welding spot phase; and performing quality detection on the welding spot according to the acquired ultrasonic signal, the welding spot phase and the constructed welding spot quality detection knowledge base to acquire a quality detection result, updating the basis knowledge base by use of the acquired welding processing parameters corresponding to the welding spot when the quality detection result is qualified, and self-adaptively adjusting the welding process parameters by use of a fuzzy control method according to the updated basis knowledge base in the subsequent resistance spot-welding process. By virtue of the method provided by the invention, the quality detection of the welding spot and the welding process parameter adjusting can be combined, thereby improving the welding quality of the welding spot.
Description
technical field [0001] The invention relates to the technical field of resistance spot welding quality detection, and more specifically relates to an adaptive resistance spot welding quality detection, control method and system. Background technique [0002] With the energy shortage and environmental pollution caused by the increasing number of automobiles, various automobile manufacturers save energy, reduce fuel consumption and reduce emission pollution by reducing the weight of the vehicle body. In addition to the characteristics of high strength and good processing performance, dual-phase steel also has the characteristics of high weight reduction potential, high crash resistance, high fatigue strength, etc., which can greatly improve the safety, reliability and comfort of automobiles. , therefore, dual-phase steel has been widely used in the automobile manufacturing industry. [0003] The resistance spot welding process is a welding method widely used in automobile man...
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IPC IPC(8): G01N29/04
CPCG01N29/04G01N2291/0234G01N2291/2672
Inventor 雷贞贞李良刘娟
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY