Quality control device and method for resistance spot welding

A quality control method, resistance spot welding technology, applied in resistance welding equipment, welding power supply, manufacturing tools, etc., can solve the problems of unobvious dynamic resistance, unrealistic detection, unsuitable for spot welding quality control of different materials, etc.
CN1730220AInactive Publication Date: 2006-02-08SHENYANG POLYTECHNIC UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHENYANG POLYTECHNIC UNIV
Publication Date
2006-02-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a resistance spot welding quality control device and method, which pertains to resistance spot welding process information detecting and quality control technology domain. The device comprises potential transformer, inverse paralleling gate circuit transistor, current-sensing device, trigger signal amplifying circuit, synchronous circuit, current effective value detecting circuit, current zero-cross detecting circuit, electrode displacement sensor and SCM control system. The procedure comprises signal pickup, characteristic information abstraction, information anastomosing, control algorithm selection and output power conditioning step. The invention has the advantages of multiple detection information, good control property, high control accuracy and extensive useage.
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Description

technical field

[0001] The invention belongs to the technical field of resistance welding process information detection and quality control, and in particular relates to a resistance spot welding quality control device and method based on multi-sensor information fusion. Background technique

[0002] Resistance welding is a welding method that uses the resistance heat generated when the welding workpiece is energized to heat the workpiece, and completes the welding under pressure. It is widely used in industrial fields such as automobiles, motorcycles, construction machinery and aerospace. The main problem existing in resistance welding at present is that the nugget size, which characterizes the welding quality, cannot be directly measured. The patent ZL98102944.2 calculates the dynamic resistance through the power factor angle, and estimates the size of the nugget according to the dynamic resistance curve. The disadvantage of this method is that the dynamic resistance of s...

Claims

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