Method and device for controlling welding process based on stability of perforated molten bath

Abstract

The invention relates to a method and a device for controlling a welding process based on stability of a perforated molten bath, and belongs to the technical field of welding equipment. The problem of electric arc skewing in the welding process is solved by the self rotation of a welding torch, the problem of change of welding positions during different-thick plate welding and misalignment welding is solved by the transverse movement of the welding torch, the problem of all-position welding is solved by the pitching of the welding torch, and the decoupling of welding torch movement and welding wire movement is realized by the respective control of the welding torch and the wire feeding system so as to control the arc striking and perforating during thick plate welding. The device is a special welding machine head for controlling the welding process based on the stability of the perforated molten bath. The method and the device have the advantages that the special plasma welding machine has higher integration degree, and the wire delivering system, the arc pressure control system, the rotation, extension and retraction of the welding torch, a camera monitoring system and the transverse movement and adjustment are organically combined into a whole; and the maintenance of a welding mechanism system is very easy.

Description

Technical field [0001] The invention relates to a welding process control method and device based on the stability of the perforated molten pool when welding key parts of an aircraft, and belongs to the technical field of aerospace welding. Background technique [0002] At present, with the development of domestic aerospace industry, welding technology suitable for aerospace materials has also been developed rapidly. Because spacecraft needs to be lightweight, a lot of aluminum materials are used, and the variable polarity plasma welding technology for welding aluminum materials is a more advantageous welding method. [0003] The welding of the key parts of the spacecraft has basically realized all-position automatic welding. The realization process is realized through the use of a cross manipulator and a welding positioner, and a welding trolley and a special welding tool. However, due to the large volume and heavy weight of the manipulator and the welding trolley, these methods ...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the deficiencies of the existing plasma welding equipment, and proposes a method that can better solve the problem that the welding arc deviates from the weld seam.

The welding control method of uneven heating on both sides and the change of welding arc length caused by the arc hole ellipticity problem, and based on this, a welding control method with reasonable size and weight, high integration, high degree of automation, and self-adaptive ability is designed. Powerful plasma welding head, which solves the process problems such as welding seam undercut and cutting, and can monitor the arc and molten pool shape in real time

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