Powder cleaning and effect inspection device and method for additively manufactured complex structural parts

Abstract

The invention provides a powder cleaning and effect inspection device and method for additively manufactured complex structural parts. In the device, the sealed operation box provides a built-in cleaning space for additively manufactured complex structural parts; the air blowing device is used to provide protective gas to the sealed operating box. And it is used to purge the powder inside and outside the complex structural parts of the additive manufacturing; the suction device is used to suck the powder in the sealed operation box and the complex structural parts of the additive manufacturing; the powder recovery screening box passes through the pipeline and the suction during the cleaning stage. The device is connected to receive the powder sucked out by the suction device. The powder entering the powder recovery and screening box is screened in multiple stages and stored on the multi-stage screen. Multiple recovery tanks are used to recover the remaining powder on the corresponding screen; powder cleaning The effect test tank is connected to the suction device through a pipeline during the test stage, including a test screen that is breathable but can screen out all the powder, and an exhaust device for exhaust.

Description

technical field [0001] The invention relates to a powder cleaning and effect testing device and method for a selective laser melting system. Background technique [0002] Additive manufacturing, also known as 3D printing, is a manufacturing technology based on the principle of discrete accumulation, which realizes the formation of parts by layer-by-layer superposition of raw material powder. Selected area laser melting technology is a kind of additive manufacturing technology. This technology is based on powder bed powder layer by layer and laser scanning layer by layer to form parts. It has a very high degree of forming freedom and can form parts with any complex structure. , especially parts with complex lumen structures. After the parts are formed, they can be put into use after simple post-processing, which can significantly shorten the processing cycle. The use of selective laser melting technology to form aero-engine fuel nozzles can significantly reduce the difficul...

AI Technical Summary

Problems solved by technology

The method of vibration and air blowing has a good cleaning effect and high efficiency for parts with simple structures, but for parts with complex internal structures, the cleaning effect is not satisfactory, and the cavity powder cannot be effectively removed

At the same time, the powder cleaning effect of this method cannot be judged objectively, and there is no reasonable inspection mechanism. The inspection effect can only be judged by the subjective experience of the operator, and the operation rationality and repeatability are poor.

The powder cleaning operation of this method is carried out in an open space, and the cleaned powder is scattered into the surrounding environment and cannot be recovered effectively, which not only seriously endangers the safety of operators and equipment, but also causes waste of powder and increased printing costs

Images