Spot welding power supply output adjusting method, device and system and storage medium

Abstract

The invention relates to a spot welding power supply output adjusting method, device and system and a storage medium. The method comprises the steps that current welding current and current welding voltage, collected in real time, of a welding head in a heat balance stage are processed, and current resistance of the welding head is obtained; the starting moment of the heat balance stage is the moment that the resistance change rate and the welding energy change rate of the welding head are both equal to zero; a reference feature value, the current resistance and preset technological parametersadopted when a spot welding power supply initially runs are processed, and to-be-adjusted voltage of the spot welding power supply is obtained; the reference feature value is obtained according to the preset technological parameters and welding current and welding voltage which are generated when the welding head is in the heat balance stage; and the output voltage of the spot welding power supply at the next welding moment is adjusted according to the to-be-adjusted voltage. According to the spot welding power supply output adjusting method, the output voltage of the spot welding power supply can be adjusted in real time according to the fed-back welding current and welding voltage, therefore, the heat accumulation phenomenon of the welding head is reduced, and the service life of the welding head is prolonged.

Description

technical field [0001] The present application relates to the technical field of resistance welding, in particular to a method, device, system and storage medium for adjusting the output of a spot welding power supply. Background technique [0002] In the field of electronic manufacturing, a large number of enameled wire spot welding is involved. At present, spot welding of enameled wire usually adopts precision inverter resistance spot welding power supply. The welding head adopts a special loop structure. The welding head is connected to the output end of the inverter power supply through the clamp. The middle separation of the welding head makes the current pass through the bottom of the welding head to form a loop. . During spot welding of enameled wire, due to the small cross-sectional area of ​​the bottom of the welding head, the bottom of the welding head has a greater current density after electrification, and the temperature rises faster, which is conducive to the ...

AI Technical Summary

Problems solved by technology

[0003] The traditional enameled wire spot welding power supply generally uses a constant current control method, a constant voltage control method or a constant power control method to control its output, but during the implementation process, the inventor found that there are at least the following problems in the traditional technology: the traditional technology cannot be well Controlling the output of the spot welding power source leads to the problem of heat accumulation in the welding head, which reduces the working life of the welding head

Images