http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
SLS 공정을 이용한 Fe-Cr 분말의 적층에 관한 연구
손영명(Y. M. Son),장정환(J. J. Janag),주병돈(B. D. Joo),성민영(M. Y. Sung),문영훈(Y. H. Moon) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.5
Selective laser sintering (SLS) is a fast growing process of rapid production for metallic based parts. To restore damaged mold surface using SLS, single layer experiments of 20 μm Fe-Cr Powder Provided feasible process parameters for the smooth regular surface. To estimate coherence between melted powder and basematal, tendency of hardness distribution has been observed. Hardness of melted zone and remelted zone was diversified from 5GPa to 6.5GPa. It is over 2 times compared of hardness of basemetal. Average surface roughness of each direction on surface of melted powder was measured. Experimental results show that the mold restoring process using SLS can be sucessfully applied in the mold repair industry.
우영윤(Y. Y. Woo),김재현(J.H. Kim),박성환(S. H. Park),박준영(J. Y. Park),문영훈(Y. H. Moon) 한국소성가공학회 2015 한국소성가공학회 학술대회 논문집 Vol.2015 No.10
The flexible roll forming process makes it possible to produce profiles with a variable width by controlling the roll stands with CNC. This process is very important for the sheet metal industry due to the high speed fabrication of products having variable profile. In this study, the effect of on the forming length of the strip in the flexible roll forming process was investigated of material properties. In the flexible roll forming, the deformation length is important since they can be used to determine the number of forming steps and the distance between them when designing the roll forming process. In this study, the influence of material properties upon deformation length have been investigated and compared with by existing model by using finite element analysis and experiment. For the flexible roll forming experiments, symmetrical U-sections are formed by three materials such as advanced high strength steel (AHSS), carbon steel and aluminum.