Electric arc additive manufacturing method

Abstract

The invention discloses an electric arc additive manufacturing method which comprises the following steps of (1) selecting a corresponding heat source type, a forming wire material, and a material type of a base plate according to the material requirement of a forming target part; (2) building a computer-aided design (CAD) geometric model of the forming target part, extracting a standard templatelibrary (STL) model, slicing the STL model, generating a G code file required for printing, and transmitting the G code to a printer; (3) setting printing parameters, starting the printer, and printing metal thin layers according to a planned route layer by layer; and (4) after finishing printing all layer sheets through the printer, carrying out arc failure through a welding gun, and obtaining the forming target part. An additive piece printed through the method provided by the invention is less in error and flawless, has the advantage of good surface quality, and is stable in process, high in dimensional accuracy and surface quality, short in processing period, and low in cost at the same time; the printing process is in closed-loop control, so that the automation degree is high, and thelabor intensity of operating personnel can be reduced; and continuous manufacturing can be realized, and the manufacturing efficiency is high.

Description

technical field [0001] The invention relates to an arc additive manufacturing method, which belongs to the technical field of metal additive manufacturing. Background technique [0002] Metal additive manufacturing technologies mostly use direct metal laser sintering (DMLS), selective laser melting (SLM), selective laser sintering (SLS), electron beam melting and sintering (EBM) and immature metal wires based on fusion welding methods. Fused deposition modeling technology. Most of the current mature metal additive manufacturing technologies require the pre-preparation of metal powder, which has defects such as low manufacturing efficiency, high manufacturing cost, and low density. [0003] Wire Arc Additive Manufacture (WAAM) is a kind of advanced digital manufacturing that uses electric arc as heat source, through the addition of wire, and under the control of the program, gradually forms metal parts from wire-surface-body according to the three-dimensional digital model. ...

AI Technical Summary

Problems solved by technology

[0004] Since arc additive manufacturing is carried out by melting wire material for liquid droplet transfer, affected by droplet transfer and molten pool flow, it is difficult to add material to manufacture complex thin-walled parts, especially for those with large structural changes in shape and size. Difficult forming of thin-walled metal structures

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