Servo pressure spot welding system

Abstract

The invention aims at providing a servo pressurizing spot welding system. The system comprises a welding controller, welding tongs and a connecting cable, wherein the welding controller is connected to the welding tongs through the connecting cable, and the welding controller comprises a welding main control panel, a welding driving board, a motor control board, a motor driver, a programming / display interface and an external I / O bus communication module; the welding tongs comprise a transformer, an electrode arm, a servo motor and a welding tongs body bracket; the connecting cable comprises a welding power wire, a welder control wire and a motor signal / power wire. The servo pressurizing spot welding system has the beneficial effects that the function of controlling the welding pressure can be achieved on the basis of a traditional welding controller, and the dependence of an current technology on robot servo control can be removed, so that the applicable scope of servo welding can be expanded, and the servo pressure control of manual welding tongs and automatic welding tongs can be achieved.

Description

technical field [0001] The invention relates to the technical field of welding devices, in particular to a servo pressure spot welding system. Background technique [0002] In the field of spot welding technology, there are three main factors affecting welding quality: welding current, welding time, and welding pressure. With the continuous development of the automobile industry, new materials and new processes are constantly being applied, and the control of welding current and welding pressure is becoming more and more important. The more stringent the requirements, the development from the power frequency 50Hz controller to the intermediate frequency controller has greatly improved the control accuracy and ensured the welding quality. In terms of welding pressure control, the current manual welding system cannot realize servo online automatic pressure control. The widely used servo robot welding system can control the welding pressure with servo drive, but there are some ...

AI Technical Summary

Problems solved by technology

In terms of welding pressure control, the current manual welding system cannot realize servo online automatic pressure control. The widely used servo robot welding system can control the welding pressure with servo drive, but there are some shortcomings as follows: First, the control of welding pressure It is carried out by the robot controller. If you want to achieve servo pressurization, you must use a servo robot with external axis control and an external axis motor, so the cost of servo pressurization is increased; second, the welding current and welding time are controlled by welding. The controller is used to control the welding pressure, while the welding pressure is controlled by the robot. The three cannot be controlled synchronously in the process sequence. At present, in order to ensure the stability of welding, the welding pressure can only be kept constant from the beginning of welding to the end of welding; 3. From the perspective of welding process, the welding pressure cannot be changed with the welding process, and the pressure can not be changed at any time during the welding process. For some special welding process materials, high-quality welding cannot be performed.

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