Stress deformation control method and device for electron beam fuse additive manufacturing process

Abstract

The invention relates to a stress deformation control method and device for an electron beam fuse additive manufacturing process. The method comprises the steps that ideal temperature field distribution data S0 for generating minimum thermal stress during additive manufacturing is determined based on material properties and thermal stress generation conditions of additive manufacturing; a metal wire is melted with a first electron gun, and layered forming is performed according to a machining path strategy of a part; a temperature monitoring probe is used for collecting real-time temperature field distribution data S1 of a forming layer; the real-time temperature field distribution data S1 is compared with the ideal temperature field distribution data S0, and when it is judged that S1 deviates from S0, an electron beam is emitted by a second electron gun, after the electron beam is controlled by a scanning coil, the electron beam is irradiated in a spot mode at a position at which thepart to be heated is formed, and when the real-time temperature field distribution data S1 in the forming process is equivalent to the ideal temperature field distribution data S0, the second electrongun and the scanning coil stop working, the first electron gun continues to work until all the layers of the part are formed.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a method and device for controlling stress deformation in an electron beam fuse additive manufacturing process. Background technique [0002] Electron beam fuse additive manufacturing technology refers to a direct energy deposition that uses electron beams to melt synchronously fed metal wires in a vacuum environment and accumulate them layer by layer according to a pre-planned path to directly manufacture the required parts or blanks. craft. Electron beam fuse additive manufacturing technology has the characteristics of fast forming speed and excellent internal quality, and is suitable for efficient and high-quality forming of large-scale high-performance metal components. [0003] One of the bottlenecks of electron beam fuse additive manufacturing technology in the manufacture of large metal components is stress and deformation control. At present, the main met...

AI Technical Summary

Problems solved by technology

This method has been applied industrially and has a good effect of controlling deformation. The disadvantage is that it increases the complexity of the process, weakens the integrity of the parts, and increases the cost and cycle time.

3) Auxiliary rolling, impact, etc., the test effect is obvious, but additional equipment needs to be added, and the structure of the machine tool also needs special adjustments, which cannot solve the problems under the existing conditions

In actual work, multiple methods are often used to control the deformation trend of parts, but this will increase the complexity of the process, increase the cost and cycle time

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