Forming control method for gta wire-filled additive manufacturing of cross structural parts

Abstract

The invention provides a forming control method for GTA wire-filled additive manufacturing of a cross structural part. The cross structural part is a structural part that intersects in the same forming layer and on the path of different forming lanes. It specifically includes the following steps: calibrating the arc voltage and The relationship between the distance between the extreme end and the surface of the forming layer directly below the arc; determine the forming path, and detect the arc voltage during the forming process of the cross structure, and the computer control system is assisted by the closed-loop controller according to the error control between the collected arc voltage and the preset arc voltage The wire feeding speed realizes the control of the forming height within the path length and the forming of the path intersection point; this invention proposes a new idea for the forming control of GTA wire-filled additive manufacturing of cross structural parts, and adjusts the wire feeding speed within the length of the forming end of the component. At the crossing path point, the closed-loop controller is used to automatically reduce the amount of wire feeding, which effectively solves the problems of poor forming stability of GTA wire-filled additive manufacturing of crossing structural parts and high protrusions at the crossing path of the forming layer.

Description

technical field [0001] The invention belongs to the technical field of arc wire-filled additive manufacturing, and in particular relates to a forming control method for GTA wire-filled additive manufacturing of a cross structure. Background technique [0002] GTA wire-filled additive manufacturing adopts GTA arc as the heat source to melt and add auxiliary wire, and form the full weld metal layer by layer. Since the current and wire feeding speed can be adjusted separately, the forming process has controllable heat input, formed parts structure and mechanical properties. With the advantages of controllability and high forming quality, it is suitable for flexible manufacturing of complex workpieces. [0003] Cross piece is a kind of typical structure of complex workpiece, and its characteristic is that in the same forming layer, there are intersections on the paths of different forming paths. At present, there are two main difficulties in the additive manufacturing of GTA wi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a forming control method for GTA wire-filled additive manufacturing of cross-structure parts to solve the problems of poor forming stability and protrusions at the intersection paths of the forming layer in the GTA wire-filled additive manufacturing process of cross-structure parts.

Images