통합 검색 | Korea Science

이석규;전춘호;박세종;이규철;최성욱;이원오;김대용
- 소성∙가공
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- 제32권4호
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- pp.199-207
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- 2023
The stainless steel basket-bowl, a critical component of washing machines, is characterized by its unique two-tiered circular shape. This study explores the potential of a draw-bead free die design to address tearing concerns in the prospective plastic layer during the drawing operation. In order to prevent wrinkles that may arise from the absence of a draw-bead, a two-stage punch configuration is proposed. The influence of the blank holder force on wrinkle reduction is also examined. Finite element analysis is employed to evaluate the proposed die design by analyzing the wrinkle shape and strain mode. The results confirm that the stainless steel basket-bowl can be successfully drawn without wrinkles utilizing the proposed two-stage punch without a draw-bead on the blank holder. These findings contribute to the development of more efficient and reliable manufacturing processes for the stainless steel basket-bowl production.
https://doi.org/10.5228/KSTP.2023.32.4.199 인용 PDF HTML

박용우;조환
- 한국염색가공학회지
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- 제10권2호
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- pp.55-61
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- 1998
최근, 과학기술의 눈부신 발전은 인류의 다양한 욕구에 부응해, 섬유산업에 있어서도 쾌적성 추구와 건강성추구 및 안락성 추구 등, 수요자의 욕구충족과 함께, 생산기술측면에서의 미래 지향적인 환경친화형 기술의 생산기술에의 응용에 대체해 나갈 수 있는, 첨단기술개발에로의 전환이 당면과제로 부상되고 있다.
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나경환;박훈재;조남선
- 한국정밀공학회지
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- 제17권7호
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- pp.14-19
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- 2000
현재 자본재산업의 기술낙후는 상품의 수출경쟁력 약화의 근원적인 원인이 되어 결국 지속적으로 선진국의 기술종속을 심화시키고 있다. 이러한 자본재 산업의 문제는 현재의 주력 수출상품의 핵심요소부품생산기술의 미비가 큰 원인이며(거의 주요핵심부품 도는 관련기술은 거의 대부분 수입에 의존하고 있음), 같은 논리로 차세대 신기술의 개발을 통한 첨단 상품의 개발도 이에 필요한 핵심요소부품의 생산기술이 뒤를 바쳐 주지 못한다면 결국 10년 후에도 현재와 같은 현상이 되풀이될 것은 분명하다.(중략)
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이승환;윤정재;백소현;권용범;송요셉;김범성;좌용호;정다운
- 한국분말재료학회지
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- 제30권3호
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- pp.268-275
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- 2023
The demand for energy is steadily rising because of rapid population growth and improvements in living standards. Consequently, extensive research is being conducted worldwide to enhance the energy supply. Transpiration power generation technology utilizes the vast availability of water, which encompasses more than 70% of the Earth's surface, offering the unique advantage of minimal temporal and spatial constraints over other forms of power generation. Various principles are involved in water-based energy harvesting. In this study, we focused on explaining the generation of energy through the streaming potential within the generator component. The generator was fabricated using sugar cubes, PDMS, carbon black, CTAB, and DI water. In addition, a straightforward and rapid manufacturing method for the generator was proposed. The PDMS generator developed in this study exhibits high performance with a voltage of 29.6 mV and a current of 8.29 µA and can generate power for over 40h. This study contributes to the future development of generators that can achieve high performance and long-term power generation.
https://doi.org/10.4150/KPMI.2023.30.3.268 인용 PDF