Electron beam selective melting additive manufacturing forming method and device
A technology of additive manufacturing and selective melting, which is applied in the field of additive manufacturing, can solve problems such as poor fusion, and achieve the effects of saving forming time, preventing poor fusion defects, and preventing forming failures
Pending Publication Date: 2022-05-27
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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Problems solved by technology
[0007] The embodiment of the present invention provides a forming method and device for electron beam selective melting and additive manufacturing. Ultrasonic waves are emitted through an ultrasonic emitting device to form an ultrasonic plane, which can apply a certain pressure to the powder on the forming plane to solve the problem of fusion caused by powder blowing. The generation of bad defects and the repeated appearance of the remelting process can effectively prevent the forming failure caused by multiple powder blowing, thereby improving the quality of the formed part and the forming efficiency
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[0043] The embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings and embodiments. The detailed description and drawings of the following embodiments are used to illustrate the principles of the present invention by example, but can not be used to limit the scope of the present invention, i.e., the present invention is not limited to the embodiments described, without departing from the spirit of the present invention, covering any modification, replacement and improvement of parts, assemblies and connection methods.
[0044] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described below with reference to the accompanying drawings and in conjunction with an embodiment.
[0045] The present application provides a forming method and apparatus to improve the quality and e...
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Abstract
The invention relates to an electron beam selective melting additive manufacturing forming method and device. The forming method at least comprises the following steps that powder is laid according to the thickness of a powder layer, electron beam preheating is started, meanwhile, a plane ultrasonic generator is started to emit ultrasonic waves according to the preset frequency and amplitude, and the ultrasonic waves are applied to the powder layer; sampling voltage between the powder layer and the ground is monitored in real time, the sampling voltage is compared with a preset voltage threshold value, and when the sampling voltage is larger than the voltage threshold value, the current ultrasonic frequency and amplitude are kept; when the sampling voltage is smaller than or equal to the voltage threshold value, the ultrasonic frequency and amplitude are increased; after the powder layer reaches the preheating temperature, the electron beam preheating and the plane ultrasonic generator are both closed; starting an electron beam melting processing program, adjusting a beam given value in real time based on the sampling voltage, and ensuring that the size of the output beam is constant; and one-time powder layer melting additive manufacturing forming is completed, the machining platform descends by the distance of the thickness of one powder layer, and the next machining period is started.
Description
Technical field [0001] The present invention relates to the field of additive manufacturing technology, specifically to a forming method and apparatus for improving the quality and efficiency of electron beam selection melting additive manufacturing forming. Background [0002] With the rapid development of China's aerospace manufacturing technology, many key structures are a large number of complex cavity components, the use of traditional technology processing when the manufacturing cycle is long, the yield of parts is low, moreover, some complex structures can not be developed, so it can not meet the structural, performance and functional requirements of the aircraft. [0003] Electron beam selection melt forming technology is an advanced manufacturing technology based on discrete stacking ideas, the use of this technology can achieve complex cavity, space lattice and brittle materials of rapid manufacturing, can greatly shorten the production cycle, quick verification of desi...
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IPC IPC(8): B22F10/28B22F10/36B22F12/00B33Y10/00B33Y30/00
CPCB22F10/28B22F10/36B22F12/00B33Y10/00B33Y30/00Y02P10/25
Inventor 陈玮杨洋邢一思
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST