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밀리미터파 간섭계용 타원 반사경의 공구 변화에 따른 고속절삭 특성 연구
이상용(Sang-Yong Lee),김건희(Geon-Hee Kim),김효식(Hyo-Sik Kim),양순철(Soon-Cheol Yang),홍창덕(Chang-Deoc Hong),조병무(Byung-Moo Cho),원종호(Jong-Ho Won) 한국기계가공학회 2007 한국기계가공학회 춘추계학술대회 논문집 Vol.2007 No.-
This study aims to find the optimal cutting conditions, when ellipse mirrors consisted Aluminum alloy were made it the Millimeter-Wave Interferometer System mirror with several tools on the High-Speed Machine. Machining technique for precision machining characteristics of ellipse mirrors consisted Al6061 matter by Ball endmill is reported in this paper. , Results of machining on the High-Speed Machine(using NCD(Natural Crystalline diamond), WC and coated TiAlN ∅6㎜ ball endmill tool) had measurement of surface roughness and form accuracy with cutting conditions(the Feed rate, the Depth of cut and the Cutting speed). the Millimeter-Wave Interferometer System ellipse mirror had been machined foundational precision machining characteristics of aluminum.
밀리미터파 간섭계용 타원 반사경의 공구 변화에 따른 고속절삭 특성 연구
이상용(Sang-Yong Lee),김건희(Geon-Hee Kim),김효식(Hyo-Sik Kim),양순철(Soon-Cheol Yang),홍창덕(Chang-Deoc Hong),조병무(Byung-Moo Cho),원종호(Jong-Ho Won) 한국기계가공학회 2007 한국기계가공학회지 Vol.6 No.4
This study aims to find the optimal cutting conditions, when ellipse mirrors consisted Aluminum alloy were made it the Millimeter-Wave Interferometer System mirror with several tools on the High-Speed Machine. Machining technique for precision machining characteristics of ellipse mirrors consisted Al6061 matter by Ball endmill is reported in this paper., Results of machining on the High-Speed Machine(using NCD(Natural Crystalline diamond), WC and coated TiAlN Ø6㎜ ball endrnill tool) had measurement of surface roughness and form accuracy with cutting conditions(the Feed rate, the Depth of cut and the Cutting speed). the Millimeter-Wave Interferometer System ellipse mirror had been machined foundational precision machining characteristics of aluminum.
Copper 촉매를 이용한 p-phenylenediamine (PPD) 합성에 관한 연구
김정석 ( Jung Suk Kim ),이상용 ( Sang-yong Lee ),이정호 ( Jung Ho Lee ),최원춘 ( Won Choon Choi ),강나영 ( Na Young Kang ),박선영 ( Sun Young Park ),김기웅 ( Ki Woong Kim ),임종성 ( Jong Sung Lim ),박용기 ( Yong-ki Park ),서휘민 ( 한국화학공학회 2016 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.54 No.3
액체 암모니아와 p-diiodobenzene (PDIB)을 반응물로, Cu계 화합물을 촉매로 사용하는Aromatic amination을 이용하여p-phenylenediamine (PPD)을 합성하였다. 촉매의 종류와 양, 환원제의 종류, 암모니아의 양, 반응 온도가 생성물의 분포에 미치는 영향을 조사하였다. Cu(I) 화합물과 Cu 분말은 촉매로서 작용한 반면 Cu(II) 화합물은 촉매로서 작용하지 않았다. 촉매의 양이 증가할수록 반응속도는 빨라지지만 부반응물인 aniline의 생성량도 증가하였다. Aniline 생성량은 또한 사용한 암모니아의 양이 증가할수록 감소하였다. 촉매 사용량을 줄이기 위해 환원제인 ascorbic acid, hydrazine, dihydroxyfumaric acid를 조촉매로 사용하면 반응속도가 크게 향상되었으나 부반응물인 aniline의 생성량 또한 증가하였다. 사용한 조촉매 중에서는 ascorbic acid와 dihydroxyfumaric acid를 사용하였을 경우가 hydrazine을 사용하였을 경우보다 반응속도가 빨랐고, dihydroxyfumaric acid를 사용하였을 경우 가장 적은 양의 aniline이 생성되었다. p-Phenylenediamine (PPD) was synthesized by aromatic amination of p-diiodobenzene (PDIB) using liquid ammonia and Cu-catalysts. The effects of the catalyst, reductant, ammonia quantity and reaction temperature on PPD production were investigated. Cu(I) compounds and Cu powder were selected as catalyst due to a higher selectivity than Cu(II) compounds. As the catalyst quantity increased, rate of PPD production as well as side reaction of aniline decreased with increasing the quantity of ammonia. Reductants such as ascorbic acid, hydrazine and dihydroxyfumaric acid were tested to lower the catalyst loading. The use of reductants resulted in increasing the reaction rate but also increased the amount of aniline The rate of reaction using ascorbic acid or dihydroxyfumaric acid was faster than that using hydrazine. The lowest side reaction of aniline was found in dihydroxyfumaric acid of reductants investigated.