Electric arc additive manufacturing method with adjustable laser shock

Abstract

The invention belongs to the field of electric arc additive manufacturing, and particularly relates to a laser shock adjustable electric arc additive manufacturing method. The method comprises the following steps: (1) obtaining a machining path of an electric arc additive; (2) setting a temperature threshold; (3) obtaining the stress field distribution of the electric arc additive manufacturing component in real time by adopting a numerical simulation method; (4) setting a laser impact path and setting laser beam parameters; (5) setting technological parameters of arc additive manufacturing, and carrying out layer-by-layer wire arc manufacturing; (6) repeating the steps (3) and (4), and carrying out laser shock treatment on the weld bead to eliminate residual stress; and (7) repeating thestep (5) and the step (6) until the electric arc additive manufacturing component is machined. Numerical simulation and laser shock are combined and applied to electric arc additive manufacturing, sothat residual stress conditions of different areas correspond to laser shock parameters, the optimal laser shock working parameters are adjusted and maintained in real time, and the forming precisionis effectively controlled.

Description

technical field [0001] The invention belongs to the field of arc additive manufacturing, and in particular relates to an arc additive manufacturing method with adjustable laser shock. Background technique [0002] Arc additive manufacturing technology is a kind of 3D printing technology. It melts metal through electric arc, and the metal solidifies rapidly to achieve accumulation. It uses the program to control the movement trajectory of the heat source to form the desired component shape layer by layer. This technology has no strict requirements on external conditions, is suitable for various forming environments and various metal materials, has high forming efficiency, and the wire materials required in the forming process are cheap and easy to prepare, making up for laser additive and electron beam additive manufacturing. Inadequacies of workmanship. In recent years, this process has begun to be applied in the aerospace field, and there is a lot of room for exploration. ...

AI Technical Summary

Problems solved by technology

[0005] However, in view of the above problems, although the existing laser shock assisted arc additive manufacturing method takes advantage of the characteristics of high power density and high accessibility of laser shock strengthening, and can produce deep residual stress affecting layers, it eliminates the forming process to varying degrees. However, there is no reasonable planning and basis for the laser shock parameters and laser shock path. With the increase of the working current during the shock, the energy input to the weld bead surface during the shock is also increasing, and the greater the reduction of the residual stress

However, when the working current is too large, the surface of the weld bead will have deeper wear and damage, and excessive compressive stress will be introduced, which is not conducive to the application of compression components.

For complex arc additive manufacturing structural parts, there are different degrees of residual tensile stress in different regions after additive manufacturing, and the impact path of the existing technology cannot improve the problem of stress deformation and cracking in different regions

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