• 제목/요약/키워드: Micro-Hole

검색결과 328건 처리시간 0.042초

초음파 진동을 이용한 미세구멍 가공기술 (A Study on Micro-hole Machining Technology using Ultrasonic vibration)

  • 이석우;최헌종;이봉구;최영재
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2002년도 추계학술대회 논문집
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    • pp.231-234
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    • 2002
  • Ultrasonic machining technology has been developed over recent years for the manufacture of cost-effective and quality-assured precision parts for several industrial application such as optics, semiconductors, aerospace, and automobile. Ultrasonic machining process is an efficient and economical means of precision machining of ceramic materials. The process is non-thermal, non-chemical and non-electric and hardly creates changes to the mechanical properties of the brittle materials machined. This paper describes the characteristics of the micro-hole of $\textrm{Al}_2\textrm{O}_3$ by ultrasonic machining with tungsten carbide tool. The effects of various parameters of ultrasonic machining, including abrasives, machining force and pressure, on the material removal rate, hole quality, and tool wear presented and discussed. The ultrasonic Machining of micro-holes in ceramics has been under taken and the machining mechanism in the ultrasonic machining of ceramics based on the fracture-mechanics concept has been analyzed.

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마이크로흘 드릴링 머신의 개발 및 절삭성능 평가 (Development of Micro-hole Drilling Machine and Assessment of cutting Performance)

  • 김민건;유병호
    • 한국공작기계학회논문집
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    • 제10권5호
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    • pp.39-44
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    • 2001
  • In this paper, drill fred mechanism, cutting depth measuring device and sensing buzzer of drill contact were investigated in order to develop the micro-hole drilling machine. Also, measuring device of cutting resistance was developed in order to estimate cutting resistance from change of cutting condition. The results show that extremely-low fled rate(less then $17{\mu}m/S$${\mu}{\textrm}{m}$ /s) can be done and cutting depth can be measured by up to 1${\mu}{\textrm}{m}$ with developed drilling machine. Accordingly we could assemble a very cheap micro-hole drilling machine($\phi$ 0.05~0.5 mm). Also we got the some properties of cutting performance i.e. under the same condition, cutting torque decreases as increase of spindle speed and rapid fled of drill brings about the inferior cutting state under low spindle speed.

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Micro-EDM 공정을 이용한 미세 형상 가공 (Machining of Micro-scale Shapes using Micro-EDM Process)

  • 김영태;박성준;이상조
    • 한국정밀공학회지
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    • 제20권9호
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    • pp.109-117
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    • 2003
  • With development of high advanced technologies and skills, micro machining techniques also are being more functional and smaller. Some of the recently developed micro machining technologies are micro drilling, micro EDM, WEDG, LBM, micro milling, micro UVM etc. In these micro machining techniques, Micro -EDM is generally used for machining micro holes, pockets, and micro structures in difficult-cut-materials. For machining micro structures, first of all, tool electrode should be fabricated by WEDG process. In micro-EDM, parameters such as peak current, pulse width, duration time are very important to fabricate the tool electrode and micro structures. Developed experimental equipments are composed of RLC circuit with PWM. In this paper, using developed micro EDM machine, the characteristics of micro electro discharge machining are investigated at micro holes, slot, and pocket machining etc. Also the trends of tool wear are investigated in case of hole and slot machining.

UV 레이저에 의한 블라인드 비아홀 가공 (Blind via Hole manufacturing technology using UV Laser)

  • 장정원;김재구;신보성;장원석;황경현
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2002년도 추계학술대회 논문집
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    • pp.160-163
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    • 2002
  • Micro via hole Fabrication is studied by means of minimizing method to circuit size as many electric products developed to portable and minimize. Most of currently micro via hole fabrication using laser is that fabricate insulator layer using CO2 Laser after Cu layer by etching, or fabricate insulator layer using IR after trepanning Cu by UV. In this paper, it was performed that a metal layer and insulator layer were worked upon only one UV laser, and increase to processing speed by experiment.

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Micro/Meso-scale Shapes Machining by Micro EDM Process

  • Kim Young-Tae;Park Sung-Jun;Lee Sang-Jo
    • International Journal of Precision Engineering and Manufacturing
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    • 제6권2호
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    • pp.5-11
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    • 2005
  • Among the micro machining techniques, micro EDM is generally used for machining micro holes, pockets, and micro structures on difficult-cut-materials. Micro EDM parameters such as applied voltage, capacitance, peak current, pulse width, duration time are very important to fabricate the tool electrode and produce the micro structures. Developed micro EDM machine is composed of a 3-axis driving system and RC circuit equipped with pulse generator. In this paper, using micro EDM machine, the characteristics of micro EDM process are investigated and it is applied to micro holes, slots, and pockets machining. Through experiments, relations between machined surface and voltages and between MRR and feedrate are investigated. Also the trends of tool wear are investigated in case of hole and slot machining.

스테인레스 강의 미세구멍 드릴링 기술 연구 (A Study on the Micro Hole Drilling of Stainless Steel)

  • 김형국;연규현;송성종
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2007년도 춘계학술대회A
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    • pp.1517-1521
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    • 2007
  • On this study, technical aspects were reviewed to drill a series of micro holes (${\phi}$0.10) over 200 within a few micron tolerance in diameter and position on the stainless steel material. Dedicated tools & jigs were designed and manufactured and optimum cutting conditions were found. On this micro hole drilling process, guide drill and step feeding were applied to help chip discharge, prevent drill breakage and finally improve the accuracy of positioning and roundness. The processing results indicated that most holes are distributed within a few micron tolerance in diameter and position intervals.

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마이크로 공구를 이용한 미세 구멍 가공기술 (Micro-hole Machining Technology for using Micro-tool)

  • 허남환;이석우;최헌종
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2003년도 춘계학술대회 논문집
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    • pp.1897-1901
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    • 2003
  • Recently, with the development of semiconductor technology the miniaturization of products as well as parts and the products with high precision are being required. In addition as a national competitive power is increasingly effected by micro part development through micro machining and the secure of micro machining technology, the study of micro machining technology is being conducted in many countries. The goal of this study is to fabricate micro tool under the size of 30$\mu\textrm{m}$ and machine micro holes through micro tool fabrication by grinding, the application of ELID to grinding wheel and the measurement of surface roughness for micro tool.

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쇼트 블라스팅 표면처리를 통한 미세홀 방전가공 성능향상에 관한 연구 (A Study on Performance Improvement of Electrical Discharge Machining for Producing Micro-holes Using a Shot Blasting Surface Treatment)

  • 장한석;김홍석;신기훈
    • 소성∙가공
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    • 제21권5호
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    • pp.312-318
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    • 2012
  • With an increasing trend toward miniaturization, electrical discharge machining(EDM) has been receiving a lot of attention as a suitable production technology for micro-parts, since it enables the machining of hard conductive materials with a high degree of repeatability and without alteration to the material. When a micro-hole is fabricated by EDM, however, the diameter of the inlet hole is larger than that of the outlet region due to the additional discharge effect caused by the eroded particles. In this paper, a shot blasting surface treatment, in which an abrasive material is accelerated through a pressurized nozzle and directed at the surface of a part, is suggested as an effective method to reduce the tapered shape of EDM micro-hole. In addition, the influence of process parameters such as spark-on time and electrode diameter on the machining performance was investigated. It is shown quantitatively that the difference in diameter between the inlet and outlet holes decreases with the shot blasting treatment and with decreasing spark-on time.