• 제목/요약/키워드: Micro endmilling

검색결과 21건 처리시간 0.032초

고속 엔드밀가공에서 가공환경 변화에 따른 가공면의 미시적 정밀도에 관한 연구 (A Study on the Microscopic Precision of Machined Surface according to Variation of Machining Environments in High Speed Endmilling)

  • 권동희;이종환;황인옥;강명창;김정석
    • 한국공작기계학회논문집
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    • 제15권6호
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    • pp.50-57
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    • 2006
  • The investigation of microscopic precision in high speed endmilling is necessary for machinability evaluation, and the environmentally conscious machining technology have more important position in recent machining process. The microscopic precision of workpiece is influenced by machining environments variation as cutting fluid type and lubricant method. In this study, the cutting forces according to variation of cooling and lubrication are investigated by specially designed tool dynamometer. And the surface roughness, micro hardness and residual stress are evaluated according to machining environment. The characteristics of damaged layer in environmentally conscious machining and conventional machining using cutting fluid are compared experimentally.

C-means 알고리즘을 이용한 마이크로 엔드밀의 상태 감시 (Condition Monitoring of Micro Endmill using C-means Algorithm)

  • 권동희;정연식;강익수;김전하;김정석
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2005년도 춘계학술대회 논문집
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    • pp.162-167
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    • 2005
  • Recently, the advanced industries using micro parts are rapidly growing. Micro endmilling is one of the prominent technology that has wide spectrum of application field ranging from macro to micro parts. Also, the method of micro-grooving using micro endmilling is used widely owing to many merit, but has problems of precision and quality of products due to tool wear and tool fracture. This study deals with condition monitoring using acoustic emission(AE) signal in the micro-grooving. First, the feature extraction of AE signal directly related to machining process is executed. Then, the distinctive micro endmill state according to the each tool condition is classified by using the fuzzy C-means algorithm, which is one of the methods to recognize data patterns. These result is effective monitoring method of micro endmill state by the AE sensing techniques which can be expected to be applicable to micro machining processes in the future.

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마이크로 엔드밀링시 공구 변형이 가공오차에 미치는 영향에 관한 연구 (A Study of Machining Error Due to Tool Deflection in Micro Endmilling)

  • 서태일;손종인;이학용
    • 한국생산제조학회지
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    • 제18권3호
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    • pp.294-299
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    • 2009
  • Micro end-milling has been becoming an important machining process to manufacture a number of small products such as micro-devices, bio-chips, micro-patterns and so on. Many related researches have given grand effects to micro end-milling phenomenon, for example, micro end-milling mechanism, cutting force modeling and machinability. This paper strongly concerned actual problem, micro tool deflection, which causes excessive machining errors on the workpiece. Machining error were predicted and measured through a series of test micro cutting and analysis of their SEM images and FEM analysis. Experiments are carried out to validate the approaches.

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마이크로 앤드밀링 공정에 의한 미소기어부품 금형 가공 기술연구 (Manufacturing Technology for Micro Gear Mold Parts Using Micro Endmilling Process)

  • 노진석;김병두;김재구;윤재성;제태진
    • 한국소성가공학회:학술대회논문집
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    • 한국소성가공학회 2009년도 추계학술대회 논문집
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    • pp.41-44
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    • 2009
  • A multi-stage gear mold including gears of 2mm and 1.5mm diameter was designed and machined in this research for developing micro gear mold manufacturing technology with micro endmill. Mechanical shapes having differential micro teeth were analyzed to be formed as designed and processing conditions were optimized by analyzing machined surface chip and cutting force. Based on the results, a prototype of micro multi-stage gear mold was manufactured.

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미세 엔드밀을 이용한 마이크로 격벽 가공기술 연구 (A study on the micro barrier rib machining using micro endmilling)

  • 이선우;민승기;제태진;이응숙;최두선
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1997년도 추계학술대회 논문집
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    • pp.977-980
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    • 1997
  • Ultraprecision machining process and MEMS technology have been taken more and more important position in machining of micro parts such as PDP and IT components, as the application field of micro parts increases. A micro machining center is very effective equipment for the fabrication of micro parts, because of its benefits such as lower power consumption, high precision and lower machining cost. Therefore, we study the possibility of application to the micro machining of barrier ribs used in PDP and also analyse the machining characteristics. The fabricated barrier rib has 30~$200\mu\textrm{m}$ pitch and was made by the flat endmill with the diameter of 0.2mm, 40, 000rpm condition.

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철계 금속 마이크로 절삭 가공시 저온 환경에서의 버 발생에 관한 기초연구 (A Basic Study on Burr Formation of Micro Cutting Process with the Ferrous Metal at tow Temperature)

  • 김건희;김동준;손종인;윤길상;허영무;조명우
    • 소성∙가공
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    • 제18권2호
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    • pp.166-171
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    • 2009
  • In this paper, a basic study on micro cutting process with SM20C at low temperature environment was performed. In macro cutting fields, the cryogenic cutting process has been applied to cut the refractory metal but, the serious problem may be generated in micro cutting fields by the cryogenic environment. However, if the proper low temperature is applied to micro cutting area, the cooling effect of cutting heat is expected. Such effect can make the reduction of tool wear and burr formation. For verifying this possibility, the micro cutting experiment at low temperature was performed and SEM images were analyzed.

마이크로 엔드밀링 공정의 절삭계수 모델링 및 최적 공정설계 (Modeling of Cutting Parameters and Optimal Process Design in Micro End-milling Processes)

  • 이광조;정성종
    • 한국생산제조학회지
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    • 제18권3호
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    • pp.261-269
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    • 2009
  • Micro end-milling process is applied to fabricate precision mechanical parts cost-effectively. It is a complex and time-consuming job to select optimal process conditions with high productivity and quality. To improve the productivity and quality of precision mechanical parts, micro end-mill wear and cutting force characteristics should be studied carefully. In this paper, high speed machining experiments are studied to construct the optimum process design as well as the mathematical modeling of tool wear and cutting force related to cutting parameters in micro ball end-milling processes. Cutting force and wear characteristics under various cutting conditions are investigated through the condition monitoring system and the design of experiment. In order to construct the cutting database, mathematical models for the flank wear and cutting force gradient are derived from the response surface method. Optimal milling conditions are extracted from the developed experimental models.

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초음파를 이용한 마이크로 혼합기 제작 (Development of Micro Mixing Device with Using Ultrasonic Wave)

  • 전용호;최병주;강승준;김동권;김현정;이문구
    • 한국생산제조학회지
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    • 제22권3호
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    • pp.459-464
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    • 2013
  • The purpose of a micro-mixing device is to enhance the mixing by increasing the diffusion effect between different types of flows. There have been many attempts to actively or passively increase mixing. However, those studies were limited to lab-scale experiments because the production of devices requires a series of processes, time, cost, and the mixing quality itself. For this reason, this study attempted to develop a quick and simple process for micro-mixing device fabrication by using conventional machining and bonding processes and applying ultrasonic waves from the outside of the mixing device. The mixing quality was quantified by using the mixing index, and the results showed that the proposed system increases the mixing from ~33% to ~10% with respect to the flow rates.