Welding molten drop transition control device based on ultrasonic frequency pulse double-tungsten-electrode coordination and control method

Abstract

The invention provides a welding molten drop transition control device based on ultrasonic frequency pulse double-tungsten-electrode coordination and a control method. A welding wire is arranged on the center of a conductive nozzle of a welding gun, the upper end of the conducive nozzle is connected with a wire feeder, tungsten electrodes are arranged on the two sides of the conductive nozzle, a protection air cover is arranged on the outer sides of the tungsten electrodes, a positive electrode of a first ultrasonic frequency bypass heating wire power source and a positive electrode of a second ultrasonic frequency bypass heating wire power source are connected to a welding wire, negative electrodes of the ultrasonic frequency bypass heating wire power sources are connected with negative electrodes of main welding power sources and the tungsten electrodes, and the positive electrode of the first main welding power source and the positive electrode of the second main welding power source are connected to parent metal. The ultrasonic frequency pulse coordination control manner is used, the molten drop transition passive control manner is changed into an active control manner, the molten drops are forced to generate ultrasonic frequency vibration, the molten drops are promoted to be dropped, the molten drop transition frequency and the molten drop size can be precisely controlled,space of a welding gun is saved, the welding directivity is eliminated, the whole size of the welding gun is reduced, and the flexibility and the accessibility of the welding gun can be improved.

Description

technical field [0001] The invention belongs to the field of welding and additive manufacturing, and in particular relates to welding droplet transfer control equipment and a control method based on supersonic frequency pulse double tungsten coordination. Background technique [0002] During the welding process, the thermal and mechanical behavior of the droplet transfer has an important influence on the weld formation and welding quality. Generally speaking, a good form of droplet transfer is conducive to improving the shape of the weld, reducing welding spatter and improving the quality of the joint. In the existing metal gas shielded welding method, because the wire melting and transition mode are directly related to the current, it is difficult to control the wire melting speed and droplet transfer independently. For example, when gas metal shielded welding is performed under low current conditions, the force to promote droplet transfer is small, and only large droplet ...

AI Technical Summary

Problems solved by technology

This method has the advantages of simple structure and low cost, but there are also certain problems: the frequency and amplitude of mechanical vibration are easily affected by unstable factors, and the accuracy and stability of accurate droplet transfer control cannot be guaranteed; the vibration device The distance from the welding torch increases the overall volume of the welding torch, which greatly reduces the flexibility and accessibility of the welding torch; the way of mechanical vibration is prone to noise and vibration of equipment, resulting in unstable welding process and accelerated equipment damage

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