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Ti(C,N)계 서메트 공구의 조성변화에 따른 절삭성능 및 신뢰도 분석
박준석,김성원,권원태,강신후,Park, June-Seuk,Kim, Seong-Won,Kwon, Won-Tae,Kang, Shin-Hoo 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.11
When WC and group IV elements are added to Ti(C,N)-Ni cermet, microstructures of the cermet is changed. The change effects directly on the property of the material. In this study, the amount of WC and group IV elements of Ti(C,N) cermet tool was investigated. The composition of WC was changed from 5 to 20wt% to determine the effect of WC on the cutting performance of cermet tool. The more WC was added, the longer the tool life of the cermet tool was. The cermet with lwt% ZrC and l4wt% WC showed the best cutting performance among the investigated cermet tools. The cutting performance of cermet cutting tools suggests the possibility in interrupted cutting for reliability test experimentation was performed repeatedly with $Ti(C_{0.7},N_{0.3})- l4WC-1ZrC-20Ni$ cermet tool machining SCM440. The flank wear of cermet cutting tool at given time condition is suitable for Normal distribution and Log normal distribution by Chi squared test.
박준석(Park, June-Seuk),구자길(HRD Ja-GilGu),편영식(Pyoun Young-Sik) 한국산학기술학회 2007 한국산학기술학회 학술대회 Vol.- No.-
이 연구의 목적은 금형분야의 국가기술자격 운영현황을 검토하고, 금형분야 기능장, 기사, 산업기사, 기능사 자격의 새로운 발전방향을 제시하는데 있다. 금형분야 자격이 발전되기 위해서는 금형분야 자격에 대한 자격구조 분석을 실시하여 산업현장의 기술변화 내용을 수용할 수 있어야 한다. 따라서 이 연구에서는 금형분야 국가기술자격 종목을 대상으로 노동시장 수요에 맞는 역할 모형 설정 원칙을 기본으로 하여 자격의 구조를 분석하고, 자격에 대한 구체적인 신설·통합·폐지·출제기준 수정의 준거를 마련하여 산업현장전문가 표적집단면접조사(Focus Group Interview)를 통해 자격종목의 재정비 방안을 제시하였다. This study is designed to review the current status of the National Technical Qualification(NTQ) system in the field of die & mold, which is focused on deficiencies of the regulatory system and qualities of die & mold professionals including the master craftsman, engineer, industrial engineer and craftsman. And it is also the purpose of this study to suggest improvement strategies for the NTQ system in the field of the die & mold. This study analyze the NTQ system for the die & mold technologies or skills based on the role model which is matched their business demands, and prepares the authority(such as Human Resources Development Service of Korea) for NTQ creation, combination, abolition, setting questions, and standards correction with priority given to die & mold industrγ and NTQ. It also offers elective options to reshuffle NTQs through focus group interview by experts.