Rapid Fabricating for Aeronautical Complicated Structural Parts Based on Stereolithography
Investment Casting based on Stereolithography(SL)has the characteristics of short production cycle and low cost,which is especially suitable for fabricating complex aeronautical parts without metal dies.But there are some problems during the fabrication process,such as low surface accuracy caused by the staircases of resin prototype,shell cracking caused by higher thermal stress during the sintering process and so on.Taking an engine turbine stator as a fabrication example,the surface accuracy of resin prototype under the effect of coating method was investigated using the laser confocal microscopy;whats more,both theoretical analysis and Finite Element Analysis(FEA)were combined and compared to reveal the thermal stress field of ceramic shell during pyrolyzing and sintering process under different situation.It was founded that the surface staircases of the resin prototype was eliminated and the surface quality was improved after coating process,the thermal stress was decreased and shell cracking was avoided by sintering the ceramic shell with the inner hollow resin prototype under theheating rate of 5℃/min.The result showed that,the metal turbine stator had high dimensional accuracy of CT4-CT6 and had a good surface finish within Ra 3.2.
Stereolithography Surface roughness Thermal stress Turbine stator
ZHOU JP LU ZL Miao K JiangB JinH Dong Yin Li DC
State Key Laboratory for Manufacturing Systems Engineering XianJiaotong University;Co-Innovation Ce Xian Aerospace Power Investment Casting Company(GROUP)Ltd State Key Laboratory for Manufacturing Systems Engineering XianJiaotong University
国际会议
The 5th International Symposium on Jet Propulsion and Power Engineering(第五届喷气推进与动力工程国际会议)
北京
英文
1-8
2014-09-15（万方平台首次上网日期，不代表论文的发表时间）