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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.

Inactive Publication Date: 2006-02-08
SHENYANG POLYTECHNIC UNIV
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Problems solved by technology

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 some materials (such as aluminum alloy, stainless steel, etc.) is not obvious, and it is not suitable for different materials. spot welding quality control
However, it is impractical to test all of these parameters

Method used

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  • Quality control device and method for resistance spot welding
  • Quality control device and method for resistance spot welding
  • Quality control device and method for resistance spot welding

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Embodiment Construction

[0061] Such as figure 1 As shown, the resistance spot welding quality control device of the present invention includes a transformer 1, an anti-parallel thyristor 2, a current sensor 3, a trigger signal amplification circuit 4, a network voltage synchronization circuit 5, a current effective value detection circuit 6, an electrode displacement sensor probe 7, A current zero-crossing detection circuit 8 , an electrode displacement sensor 9 , and a single-chip microcomputer control system 10 . The input voltage of the device adopts single-phase 380V power frequency alternating current, and the output is connected to the welding workpiece.

[0062] The circuit connection is: the 1st and 2nd pins of the connector 2CON1 in the network voltage synchronous circuit are respectively connected with the L1 and L2 of the transformer (1); the 1st pin of the connector 2CON2 in the network voltage synchronous circuit is connected with the current zero-crossing detection circuit Pin 1 of co...

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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.

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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Application Information

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IPC IPC(8): B23K11/11B23K11/24
Inventor 常云龙
Owner SHENYANG POLYTECHNIC UNIV
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