Circumferential weld narrow gap MAG welding process simulation and molten pool information acquisition device and method

Abstract

The invention discloses a circumferential weld narrow gap MAG welding process simulation and molten pool information acquisition device and method in the technical field of welding. The circumferential weld narrow gap MAG welding process simulation device comprises: a workbench, wherein a first clamp and a second clamp which can coaxially rotate are arranged on the workbench; a metal test piece which is fixed on the first clamp, wherein a specified welding groove is formed in one surface of the metal test piece; a light-transmitting plate which is fixed on the second clamp, wherein a specified welding groove is formed in one surface, attached to the metal test piece, of the light-transmitting plate, and the light-transmitting plate and the welding groove in the metal test piece form a welding seam; and an MAG welding machine which is used for carrying out simulation welding operation on the welding seam. The narrow-gap circumferential weld is simulated through the metal test piece with the welding groove and the light-transmitting plate, the whole welding process can be simulated truly, internal changes of a welding pool can be observed conveniently, and conditions are created for studying dynamic behaviors of the welding pool and optimizing MAG welding parameters.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a device and method for simulating a girth weld narrow gap MAG welding process and collecting molten pool information. Background technique [0002] In recent years, large-thickness welding products have been widely used in large-scale equipment such as ships and heavy machinery, but welding problems in the manufacturing process have gradually become prominent. Traditional welding methods often use large V-shaped grooves, which seriously affect the progress of engineering production due to problems such as large welding filling volume, low efficiency, and difficult deformation control. One of the key technologies. [0003] The narrow gap MAG welding method, as a welding method that can greatly reduce the groove area and achieve high-efficiency and high-quality welding with a small welding input energy, has become a very potential welding method to solve the welding ...

AI Technical Summary

Problems solved by technology

The first is to directly observe the flow of the molten pool in the groove through the coaxial or side-axis method, but due to the limitation of the groove and the shielding of the molten droplet and the molten pool by the welding torch, it is impossible to accurately see the molten droplet transition and molten pool flow behavior

Another way is to use plate surfacing welding to replace the real welding situation. Although it gets rid of the space limitation, it is quite different from the real welding situation and cannot truly reflect the welding situation between the molten pool and the side wall in the groove

The shortcomings of these methods have greatly hindered the study of the narrow gap welding process and its dynamic behavior of the molten pool, and also made the optimization of process parameters difficult.

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