• 제목/요약/키워드: Glass machining

검색결과 159건 처리시간 0.072초

Quartz Glass Ferrule의 절단가공 및 상태 감시

  • 김성렬;이돈진;김선호;안중환
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2004년도 춘계학술대회 논문요약집
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    • pp.286-286
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    • 2004
  • 초고속 정보통신망 구현에 필수적인 광학 연결용 부품인 광 Ferrule은 광섬유 커넥터의 중요부품으로서 우수한 치수정밀도와 내마모성을 갖추어야 한다. 현재, Ferrule로 사용되는 재료는 지르코니아, 알루미나 등 세라믹 물질이 많이 사용되고 있으며 기계적 강도나 내마모성 면에서는 우수하지만, 피연마속도가 석영섬유에 비해 현저히 작아서 특수한 연마방법을 채택해야 하며 성형성이나 가공성이 나빠 생산효율이 낮고 비용이 비싸다는 단점을 가지고 있다.(중략)

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Powder Blasting을 이용한 유리의 미세 선형 홈 가공시 노즐 주사 횟수의 영향 (Effect of the Number of Nozzle Scanning in Micro-Line Grooving of Glass by Powder Blasting)

  • 박경호;김광현;최종순;박동삼
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2001년도 춘계학술대회 논문집(한국공작기계학회)
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    • pp.294-299
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    • 2001
  • The old technique of sandblasting which has been used for decoration of glass surface has recently been developed into a powder blasting technique for various materials, capable of producing micro structures larger than 100 m. This paper describes the performance of powder blasting technique in micro-line grooving of glass and the effect of the number of nozzle scanning on the depth and width of line groove. Experimental results showed that increasing the no. of nozzle scanning resulted in the increase of depth and width in grooves. Increase of width which may cause several problems in the precision machining results from wear of mask film.

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구면 전용 Infeed 연삭기의 개발과 성능평가 (Develvopment of Infeed Grinding Machine and Its Effects on Spherical Surface Grinding)

  • 이상직;정해도;최헌종
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1995년도 추계학술대회 논문집
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    • pp.1028-1032
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    • 1995
  • This paper describes the manufacture of spherical and aspherical surface on glass, superalloy and ceramic components. The rotationally symmetricallenses, and the ceramic or superalloy molds with spherical shapes are mainly generated by cutting processes on CNC lathe machine or 4,5 axis CNC machining centers. Recently, spherical shape parts require more precise and efficent machining technologies for wide material range such as optical lens of the lithography device in semiconductor manufacturing processes or the high precision mold machining of anti-chemical, anti-wear materials. In this paper, we introduce a newly developed infeed grinding machine with metal with metal bonded cup type wheel and its effects on spherical surface grinding.

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실험용 초음파 가공기의 제작 및 가공실험에 관한 연구 (A Study on the Fabrication of Prototype Ultrasonic Machine Tool and It's Experimental Machining)

  • 김종광;서용위
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2000년도 추계학술대회 논문집
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    • pp.930-933
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    • 2000
  • In this report experimental ultrasonic machine system has been fabricated and experimental machining has been performed using glass as a workpiece material. As grit size increases, material removal rate(MRR) was observed to be increased at decreased applied tool pressure on the workpiece, however at the higher applied pressure above $2-4\;kg/cm^2$ for smaller grit size, the MRR was not increased. Also better surface roughness was obtained for smaller grit size. Microchipping was observed from the microscopic examination and the pattern is similar to the iso-stress field where cracking is considered to be initiated near the surface.

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Micromachining 기술을 이용한 micro mass flow sensor의 제작 (The fabrication of micro mass flow sensor by Micro-machining Technology)

  • 어수해;최세곤
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1987년도 전기.전자공학 학술대회 논문집(I)
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    • pp.481-485
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    • 1987
  • The fabrication of a micro mass flow sensor on a silicon chip by means of micro-machining technology is described on this paper. The operation of micro mass flow sensor is based on the heat transfer from a heated chip to a fluid. The temperature differences on the chip is a measure for the flow velocity in a plane parallel with the chip surface. An anisotropic etching technigue was used for the formation of the V-type groove in this fabrication. The micro mass flow sensor is made up of two main parts ; A thin glass plate embodying the connecting parts and mass flow sensor parts in silicon chip. This sensor have a very small size and a neglible dead space. Micro mass flow sensor can fabricate on silicon chip by micro machining technology too.

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미립분사가공을 이용한 유리 소재의 가속도 센서 구조물 성형 (Fabrication of the Acceleration Sensor Body of Glass by Powder Blasting)

  • 박동삼;강대규;김정근
    • 한국정밀공학회지
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    • 제23권2호
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    • pp.146-153
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    • 2006
  • Acceleration sensors have widely been used in the various fields of industry. In recent years, micromachining accelerometers have been developed and commercialized by the micromachining technique or MEMS technique. Typical structure of such sensors consist of a cantilever beam and a vibrating mass fabricated on Si wafers using etching. This study investigates the feasibility of powder blasting technique for microfabrication of sensor structures made of the pyrex glass alternating the existing Si based acceleration sensor. First, as preliminary experiment, effect of blasting pressure, mass flow rate of abrasive and no. of nozzle scanning on erosion depth of pyrex and soda lime glass is studied. Then the optimal blasting conditions are chosen for pyrex sensor. Structure dimensions of designed glass sensor are 2.9mm and 0.7mm for the cantilever beam length and width and 1.7mm for the side of square mass. Mask material is from aluminium sheet of 0.5mm in thickness. Machining results showed that tolerance errors of basic dimensions of glass sensor ranged from 3um in minimum to 20um in maximum. This results imply the powder blasting can be applied for micromachining of glass acceleration sensors alternating the exiting Si based sensors.

핫 프레스 성형용 EL-Max 소재 초정밀 연삭 가공에 관한 연구 (Study on Ultra-precision Grinding of EL-Max Material for Hot Press Molding)

  • 박순섭;고명진;김건희;원종호
    • 한국정밀공학회지
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    • 제29권12호
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    • pp.1267-1271
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    • 2012
  • Demand for optical glass device used for lighting could increase rapidly because of LED lighting market growth. The optical glass devices that have been formed by hot press molding process the desired optical performance without being subjected to mechanical processing such as curve generation or grinding. EL-Max material has been used for many engineering applications because of their high wear resistance, high compressive strength, corrosion resistant and very good dimensional stability. EL-Max is very useful for a glass lens mold especially at high temperature and pressure. The performance and reliability of optical components are strongly influenced by the surface damage of EL-Max during grinding process. Therefore, the severe process condition optimization shall be necessary for the highly qualified EL-Max glass lens mold. To get the required qualified surface of EL-Max, the selection of type of the diamond wheel is also important. In this paper, we report best grinding conditions of ultra-precision grinding machining. The grinding machining results of the form accuracy and surface roughness have been analyzed by using Form Talysurf and NanoScan.

금형의 절삭가공에서 이론 모형 기반 표면거칠기 예측 결과의 실험적 모형 전환을 위한 인공신경망 구축에 대한 연구 (A Study on the Construction of an Artificial Neural Network for the Experimental Model Transition of Surface Roughness Prediction Results based on Theoretical Models in Mold Machining)

  • 김지우;이동원;김종선;김종수
    • Design & Manufacturing
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    • 제17권4호
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    • pp.1-7
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    • 2023
  • In the fabrication of curved multi-display glass for automotive use, the surface roughness of the mold is a critical quality factor. However, the difficulty in detecting micro-cutting signals in a micro-machining environment and the absence of a standardized model for predicting micro-cutting forces make it challenging to intuitively infer the correlation between cutting variables and actual surface roughness under machining conditions. Consequently, current practices heavily rely on machining condition optimization through the utilization of cutting models and experimental research for force prediction. To overcome these limitations, this study employs a surface roughness prediction formula instead of a cutting force prediction model and converts the surface roughness prediction formula into experimental data. Additionally, to account for changes in surface roughness during machining runtime, the theory of position variables has been introduced. By leveraging artificial neural network technology, the accuracy of the surface roughness prediction formula model has improved by 98%. Through the application of artificial neural network technology, the surface roughness prediction formula model, with enhanced accuracy, is anticipated to reliably perform the derivation of optimal machining conditions and the prediction of surface roughness in various machining environments at the analytical stage.