Device and method for detecting actual pressurizing position in spot welding process of robot

Abstract

The invention discloses a device and a method for detecting the actual pressurization position in the spot welding process of a robot, and belongs to the technical field of welding. The device comprises a detection assembly and a control system, wherein the detection assembly comprises a camera assembly and a background assembly which are arranged at the two sides of a spot welding electrode, and the camera assembly and the background assembly are electrically connected with the control system. According to the device and the method for detecting the actual pressurization position in the spot welding process of the robot, the detection efficiency is high, the detection result is visual, full-automatic detection can be achieved, a curve of the relation between the actual pressurization position and time in the spot welding process of the robot can be obtained under the condition that a test piece is not used or used, and according to the curve, whether the wear compensation function of the spot welding electrode, the elastic deformation compensation function of a spot welding head and the combination thereof are normal or not and the programming and teaching ability of the spot welding robot are analyzed and evaluated, so that no material is consumed when the test piece is used, and the use cost is low.

Description

technical field [0001] The invention discloses a detection device and method for an actual pressurized position in a robot spot welding process, and belongs to the field of welding technology. Background technique [0002] Resistance spot welding is a kind of resistance welding. It is a method of applying electrode pressure to the workpiece through the spot welding electrode and energizing, and using resistance heat to weld. It is widely used in aerospace, automobile, home appliance manufacturing and other fields. In terms of operation, resistance spot welding operations mainly include robot spot welding and manual spot welding. Among them, the application and specific gravity of spot welding by robots holding welding tongs or workpieces is increasing year by year. [0003] However, in actual production, it often occurs that the actual pressurized position is different from the target pressurized position due to factors such as low teaching quality, poor compensation (or cor...

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Problems solved by technology

[0004]The purpose of the present invention is to solve the actual problems caused by factors such as low teaching quality of existing resistance spot welding, poor compensation of spot welding electrode wear, and poor compensation of elastic deformation of spot welding tongs. There are large fluctuations in the pressurized position relative to the target pressurized position, resulting in abnormal deformation of parts, robot vibration, increased equipment wear, and reduced welding quality. A detection device and method for the actual pressurized position during robot spot welding is proposed

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