Coaxial in-arc wire feeding and out-arc powder feeding TIG electric arc additive manufacturing device

Abstract

The invention relates to a coaxial in-arc wire feeding and out-arc powder feeding TIG electric arc additive manufacturing device. The device comprises a SiO2 glass tube, four powder feeding spray nozzles, a tungsten electrode red copper cooling body, a half-cracking hollow tungsten electrode and four powder feeding channels. Four types of alloy powder with different components can be supplied at most through the four powder feeding channels and the powder feeding quantity of each powder feeding channel is adjustable, and additive manufacturing of a functional gradient structure material part is achieved easily, so that material, structure and service performance of the additive manufacturing part are matched optimally.

Description

technical field [0001] The invention relates to a TIG arc additive manufacturing device and process method for coaxial arc wire feeding and arc outer powder feeding, belonging to the field of arc additive manufacturing. Background technique [0002] TIG Arc Additive Manufacturing (WAAM) is an important means of low-cost and high-efficiency additive manufacturing technology by using electric arc as the heat source and wire as the additive additive material to realize the rapid and near-net shape of metal parts. [0003] TIG arc additive manufacturing; TIG arc uses high-frequency arc or pulse arc to form a stable plasma conductor between the tungsten electrode and the workpiece. This plasma conductor is called TIG arc. The TIG arc heat source melts the wire fed at a constant speed and transitions into the molten pool. Its advantages lie in its wide applicability and good quality. However, the TIG wire-filled additive manufacturing is limited by the solid tungsten electrode, a...

AI Technical Summary

Problems solved by technology

However, the TIG wire-filled additive manufacturing is limited by the solid tungsten electrode, and the lateral wire feeding method is often used. When the additive manufacturing direction changes, the spatial relationship between the wire and the arc changes, which changes the additive manufacturing conditions. Difficulty in ensuring constant conditions and consistent quality in the additive manufacturing process

[0004] Due to the effect of arc heat, TIG arc additive manufacturing often oxidizes, burns and evaporates some elements, and the lost alloy elements cannot be replenished, so the performance of parts cannot meet the performance requirements

[0005] TIG arc additive manufacturing uses wire. Due to the limitation of the wire manufacturing process (especially the drawing process), a large amount of alloying elements cannot be added to the wire, otherwise the wire is difficult to manufacture. It will bring about an increase in manufacturing costs, so TIG arc fuse additive manufacturing is difficult to achieve parts manufacturing with high alloy content

[0006] It is difficult to realize the manufacturing of functionally graded structural material components with a single TIG arc fuse additive manufacturing process, so it is difficult to achieve the requirements for rational use of materials, structural topology optimization, and optimum performance.

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