Stress and deformation control method and device for electron beam fuse additive manufacturing process
A technology of additive manufacturing and stress deformation, applied in the field of additive manufacturing, can solve the problems of weakening the integrity of parts, increasing cost and cycle, increasing process complexity, etc., and achieve the effect of reducing deformation tendency and thermal stress
Active Publication Date: 2021-07-27
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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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
Method used
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[0032] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The detailed description and accompanying drawings of the following embodiments are used to illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention, that is, the present invention is not limited to the described embodiments, without departing from the spirit of the present invention Any modification, substitution and improvement of parts, components and connection methods are covered under.
[0033] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.
[0034] combine figure 1 and figure 2 As shown, the stress deformation control device of the e...
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The invention relates to a method and device for controlling stress and deformation in an electron beam fuse additive manufacturing process. The method includes: based on the material characteristics of additive manufacturing and thermal stress generation conditions, determining the ideal temperature field distribution data S that generates the minimum thermal stress during additive manufacturing 0 ; use the first electron gun to melt the metal wire, and form layers according to the processing path strategy of the part; use the temperature monitoring probe to collect the real-time temperature field distribution data S at the forming level 1 ; The real-time temperature field distribution data S 1 and the ideal temperature field distribution data S 0 compare, when judging S 1 Deviate from S 0 When , the electron beam is emitted by the second electron gun, and after being controlled by the scanning coil, the electron beam spot is irradiated on the forming position of the part to be heated. When the real-time temperature field distribution data S during the forming process 1 and the ideal temperature field distribution data S 0 At the same time, the second electron gun and the scanning coil stop working, and the first electron gun continues to work until all 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...
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IPC IPC(8): B23K15/00
CPCB23K15/00B23K15/0026
Inventor 杨光杨帆董伟巩水利
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST