GMA additive manufacturing method for cross-path metal components based on current sensing

Abstract

The invention provides a GMA additive manufacturing method for cross-path metal components based on current sensing. During the GMA additive manufacturing process for cross-path metal components, current sensors are used to detect in real time the current variation curves of GMA arcs on all stacking paths, and computer control According to the deviation between the detected current and the set current and the variation trend of the deviation, the system controls the walking speed on the stacking path, thereby adjusting the filling amount of wire on the stacking path in real time, and realizes the stacking path and path crossing of GMA additive manufacturing of cross-path metal components For the control of point forming, the method of the present invention uses arc current sensing to feed back the change of stacking height at the length of the stacking path of metal components and the intersection point of the path, and changes the walking speed of the GMA gun in real time to regulate the amount of wire filling on the stacking path, effectively solving the problem of crossover. The path to GMA additive manufacturing of metal components raises serious challenges.

Description

technical field [0001] The invention belongs to the technical field of arc-filled wire additive manufacturing, and in particular relates to a GMA additive manufacturing method for cross-path metal components based on current sensing. Background technique [0002] Gas metal arc (GMA) additive manufacturing uses GMA arc as the heat source to continuously melt the filler wire, and manufacture fully welded metal components layer by layer. Due to its obvious advantages such as cheap power equipment, high stacking efficiency, and coaxial wire and electrode, it is widely used in the direct forming of medium and large-sized complex metal components. [0003] The cross-path metal member is a typical structure of complex members, and its characteristic is that there are overlaps and intersections on the paths of different accumulation paths in the same height of the forming layer. The difficulty of using GMA additive manufacturing technology to form such cross-path metal components i...

AI Technical Summary

Problems solved by technology

However, the method of controlling the shape of the convex point through the wire feeding speed proposed in the "Control Method for GTA Wire Filling Additive Manufacturing Forming of Cross Structure Parts" with the application number of Chinese invention patent application No. 201810090693. The wire feeding speed will cause the change of the arc current. It is inappropriate to use the arc current as the feedback parameter to overcome the arc current change caused by the adjustment of the wire feeding speed.

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