|Table of Contents|

Analysis of forming technology of special-shaped capillary injector by selective laser melting(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2023年04期
Page:
90-98
Research Field:
目次
Publishing date:

Info

Title:
Analysis of forming technology of special-shaped capillary injector by selective laser melting
Author(s):
CAI Jiaxin1; 2;  BAI Jing1; 2;  YANG Huanqing1; 2;  WANG Ying1
(1.Xi'an Space Engine Company Limited, Xi'an 710100, China; 2.Industry Aerospace Special Component Manufacturing Technology Innovation Center of National Defense Technology, Xi'an 710100, China)
Keywords:
selective laser melting;  forming angle;  surface morphology;  surface finish;  chemical milling
PACS:
V461
DOI:
-
Abstract:
The special-shaped capillary injector is the core component of the attitude control engine. This type of component has extremely high requirements for the internal surface quality of the flow channel. In order to promote the application of SLM technology to the above products to achieve the purpose of rapid development of model products, taking the surface quality of the special-shaped capillary microporous channel as the research object, the surface morphology and surface roughness of the ostiole under different forming angles were studied by means of laser ultra-depth microscope. The capillary structure with good surface quality can be obtained by adjusting the forming angle within the range of 75°-90°. Based on the research of the surface finishing technology of the special-shaped capillary structure, the uniform finishing of the special-shaped capillary structure was realized, the dimensional accuracy is within ±0.05 mm and surfaceroughness is less than 6.3 μm. The liquid flow performance of the injector by SLM was verified by the liquid flow test, and the high performance integrated forming of the special-shaped capillary structure attitude control injector was realized.

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