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DEFORM을이용한 로터리 스웨이징 공정의 시뮬레이션에 대한 연구
임동재(Dong-jae Lim),정원지(Won-Jee Chung),설상석(Sang-Suk Sul),김대영(Dae-Young Kim),최경신(Kyung-Shin Choi),차태형(Tae-Hyung Cha) 한국기계가공학회 2019 한국기계가공학회지 Vol.18 No.6
Rotary swaging is a method of forging automotive drive shafts. In this paper, we propose a new two-hammer forging technique by applying the problem-solving approach TRIZ to improve the efficiency and productivity of the rotary swaging automation process. We will simplify the materials and hammers via the 3D modeling tool SolidWorks for high accuracy of a comparative analysis of existing and proposed methods under the same boundary conditions. In addition, we will compare the stress trends of the proposed model using ANSYS Workbench and verify the feasibility through a comparison of the simulation results using DEFORM. Relative to the existing method, the proposed method can decrease production costs and improve efficiency of the automation process by reducing the power source.
Hydroxylapatite 보형물($VoCoM^{(R)}$)을 이용한 제1형 갑상연골성형술
박영학,송창은,임동재,조승호,Park, Young-Hak,Song, Chang-Eun,Im, Dong-Jae,Cho, Seung-Ho 대한후두음성언어의학회 2007 대한후두음성언어의학회지 Vol.18 No.1
Background and Objectives: $VoCoM^{(R)}$ is a set composed of prefabricated hydroxylapatite implants and shims of various sizes that are designed for the type I thyroplasty, Authors aimed to evaluate the efficacy of $VoCoM^{(R)}$ System in type I thyroplasty. Materials and Method: Twenty three patients with unilateral vocal cord palsy were included in the study, who received type I thyroplasty with $VoCoM^{(R)}$ between May 2000 and May 2007 in St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea, Acoustic, aerodynamic and stroboscopic analyses were performed pre-and post-operatively, Subjective voice improvement was analysed by Voice handicap index, Results : Preoperative jitter was $4.68{\pm}2.46%$ and improved to $3.19{\pm}1.94%$(P<0,05), Preoperative NHR was $0.26{\pm}0.1$ and improved to $0.18{\pm}0,07$(P<0.05), Preoperative MPT was $6.16{\pm}4.9$secs improved to $9.55{\pm}4.67$secs(p<0.05), The postoperative stroboscopy revealed an effective medialization of vocal fold of all patients, Conclusion: Type I thyroplasty using $VoCoM^{(R)}$ is a efficient, safe and convenient way of vocal fold medialization at the expense of its high cost and difficulty in removal.