|Table of Contents|

Process study on warp distortion inhibition of selective laser sintering(PDF)

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

Issue:
2019年03期
Page:
75-80
Research Field:
工艺与材料
Publishing date:

Info

Title:
Process study on warp distortion inhibition of selective laser sintering
Author(s):
WU Xiaoming;  ZHOU Yaxiong;  YANG Huanqing;  WANG Yu;  WANG Lin
(Xi'an Space Engine Company Limited,Xi'an 710100, China)
Keywords:
selective laser sintering;  warp distortion;  preheating temperature;  technologic support
PACS:
V261.3
DOI:
-
Abstract:
Aiming at the warp distortion problem of selective laser sintering(SLS), its produce mechanism is descried. Main reasons are the nonuniform distribution of temperature field and the insufficient strength of sintered layer. Preheating temperature controlling and adding technologic support are the key measures to inhibit warp distortion. Taking the cantilever sample as the research object, the orthogonal experiment on the preheating temperature was designed, and a quadratic multiple regression model of the preheating temperature and warp distortion rate was established for the cantilever structure.. Furthermore, the reasonable technical parameters of preheating temperature were determined, and the impeller technical support design of a liquid-fuel rocket engine was carried out by using Magics software combined with the product structure characteristics. The results show that the wrap distortion rate of cantilever sample is reduced from 6.13% to 0.5%, and the wrap distortion rate of product is reduced from 10.31% to 1.80%, which has solved the problem of SLS warp distortion inhibition.

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Last Update: 2019-06-30