• Title/Summary/Keyword: Polishing Tool

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A Study on the Improvement of Performance for High Speed Cutting Tool using Magnetic Fluid Polishing Technique (자기연마기술을 이용한 고속절삭공구의 성능향상에 관한 연구)

  • Cho, Jong-Rae;Yang, Sun-Cheul;Jung, Yoon-Gyo
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.15 no.1
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    • pp.32-38
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    • 2006
  • The magnetic fluid polishing technique can polish the tool of complex shape, because the polishing method which polishes as compress the workpiece by the magnetism abrasives to arrange to the linear according to the line of magnetic force. Therefore, we producted the magnetic fluid polishing device in order that mirror like finishing processes the tool surface. In order to a polishing condition selection, polishing characteristic was estimated by polishing conditions which are magnetic flux density, polishing speed, grain size, magnetic fluid. The tool was polished to the selected polishing condition. The result to evaluate the polished tool's performance with the cutting force and tool wear, the polished tool's performance was improved compared with the tool not to polish.

Full Contact Polishing Method of Aspherical Glass Lens Mold by Airbag Polishing Tool (에어백 공구에 의한 비구면 유리 렌즈 금형의 전면 접촉 연마)

  • Lee, Ho-Cheol;Kim, Jung-Uk
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.17 no.5
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    • pp.82-88
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    • 2008
  • Conventional aspherical lens polishing methods by the small tool polishing use aspherical profile and the trajectory of the polishing tool is also controlled. In this paper, new full contact polishing mechanism is suggested to polish aspherical glass lens mold by both airbag polishing tool and eccentric motion. Full contact concept by airbag polishing tool and no position control make the easy polishing setup and do not need aspherical design profile. An aspherical lens polishing machine was made for this study and a verification experiment was performed for surface roughness improvements.

Tool Mark Removal Method of Aspherical Glass tens Mold by Reverse-rotational Eccentric Motion (역회전 편심 운동 방식에 의한 비구면 유리렌즈 금형의 공구마크 제거 방법에 관한 연구)

  • Lee, H.C.;Kim, J.U.;Kang, H.H.;Kim, D.S.
    • Transactions of Materials Processing
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    • v.18 no.2
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    • pp.172-176
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    • 2009
  • In this paper, new aspherical surface polishing mechanism is suggested to polish aspherical glass lens mold by both airbag polishing tool and reverse-rotational eccentric motion. Up to now, conventional aspherical lens polishing method by the small tool polishing uses the aspherical surface profile and the trajectory of the polishing tool is also controlled. However, full contact concept by airbag polishing tool and no position control make the easy polishing setup and does not need aspherical design profile. An aspherical lens polishing machine was made for this study and a tool mark removal experiment fur the fine-grounded lens mold was successfully performed.

Dwell time calculation algorithm in aspherical lens polishing with discrete annular tool path (이산 환형 방식의 비구면 렌즈 연마 경로에서 체재 시간 제산 알고리듬)

  • Lee Ho Cheol;Yang Min Yang
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.14 no.2
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    • pp.14-20
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    • 2005
  • This paper describes a dwell time calculation algorithm for polishing tool path generation in the small toot polishing process of the axis-symmetrical lens. Generally dwell time control in the polishing machines means that small polishing tool stays for a dwell time at the specific surface position to get the expected polishing depth. Polishing depth distribution on an aspherical lens surface consists of the superposition of the local polishing depth at the each dwell position. Therefore, tool path generation needs each dwell time together with tool positioning data during the polishing tool movements on the aspherical lens surface. The linear algebraic equation of removal depth removal matrix and dwell time is formulated. Parametric effects such as the dwell d interval are simulated to validate the dwell time calculation algorithm.

Micro Polishing Force Control of the Polishing Machine with the Airbag Tool (에어백 공구 기반의 광학 연마 장치의 미세 힘 제어 구현)

  • Lee, Ho-Cheol;Lee, Chang-Eun;Je, Tae-Jin
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.21 no.5
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    • pp.714-719
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    • 2012
  • In this paper, the polishing force monitoring and the control method were implemented for the polishing machine with the airbag tool. Airbag tool has been known to be adaptable to the curvature variation such as the aspherical and the free-form surface. However, it was necessary to control the tool movement of vertical axis also because of the table rotational wobble and vibration. To solve it by the polishing force control, we installed another stepping motor to the z-axis. And the polishing force was measured with the load cell and controlled by the PID Labview controller. A few hundreds gram of the polishing force were well controlled under 0.8 second of the response time and 5% variation. An experiment was done to clean the edge burrs of the micro channel structure of width $87{\mu}m$ using the polishing force control.

A Study on Optics Polishing Technology by Adaptive Tool and Eccentric Motion Mechanism (적응형 공구 및 편심 운동 방식의 광학 연마 기술에 관한 연구)

  • Lee, Ho-Cheol
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.16 no.6
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    • pp.133-139
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    • 2007
  • In this paper, optics polishing technology using adaptive tool and eccentric motion mechanism was suggested. Optics polishing can make high reflective and accurate surface. The optics polishing process based on the eccentric motion mechanism has been used to manufacture the ophthalmic lens mold. Also ophthalmic lens mold factory hold conventionally a lot of the curved polishing tools for the versatile mold curves of eye diopters and want to reduce tool numbers. Therefore, a polishing machine with adaptive airbag tool was developed and experimentally verified in view of surface roughness and form accuracy.

Evaluation Tool Life and Cutting Characteristics of Carbide Hob TiAlN Coating Surface Polishing Using Aero Lap Polishing Technology and Multi-con (Multi-con와 ALPT을 활용한 TiAlN코팅층 표면연마 초경호브의 절삭특성 및 공구수명 평가)

  • Cheon, Jong-Pil;Pyoun, Young-Sik
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.21 no.5
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    • pp.848-854
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    • 2012
  • SCM420 steel cutting gear to improve the durability is quenched. When quenching, increases surface hardness, a change of the physical properties and machinability or fall. This study, using a solid carbide hobs skiving hobbing gear cutting finishing. And cutting tool solid carbide TiAlN coating hove when TiAlN coating on the surface of multi-con polishing hob conducted aero lap nano polishing for each cutting. Experimental results conducted aero lap nano coating on the surface polishing tool machinability was excellent. And aero lap nano polishing tool results were reduced 2.5 times the tool wear compared to TiAlN coated tools. Excellent results were 1.42 times longer tool life.

Development of 3 dimensional Automatic Polishing System (3차원 자동 연마장치의 개발)

  • ;;;Isao Shibata
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2002.04a
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    • pp.314-318
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    • 2002
  • Recently, new polishing tool which was made by magnetic intelligent compound(Magic) was invented. The distribution of abrasives in this new tool can be controlled by magnetic field. Therefore, we can make a special polishing tool which has well arranged abrasives after cooling. In this study, 3 dimensional polishing machine was developed in order to polish complicated - shaped inner surfaces of molds. The performance of developed machine was investigated by measuring the roughness of polished surface using new polishing tool.

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A study on the improvement of polishing surface using Oscillation-type tool and AE sensor (요동형 공구와 AE센서를 이용한 연마면 향상에 관한 연구)

  • 김정욱;김성렬;안중환
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2003.06a
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    • pp.1682-1687
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    • 2003
  • Die polishing technology is very critical to determine quality and performance of the final products. Generally, the rotation-type tool is used most widely in the polishing process. However it is difficult to make the mirror surface, because the method using the rotation-type tool causes a lot of tiny scratch on the polished surface. This paper proposes a new method using the oscillation-type tool that reduces the scratch and improves the surface roughness. As result. the mirror surface was able to obtain by using the oscillation-type tool. AE is known to be closely related to material removal rate(MRR). As the surface is rougher, MRR gets larger and AE increase. The surface roughness can be indirectly estimated using the AE signal measured during automatic die polishing process. In this study. an AE sensor based monitoring system was developed to investigate the relation the level of AE RMS with the surface roughness during polishing process.

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A study of minimizing edge chipping of coverglass using MR Polishing (MR Polishing을 이용한 커버글라스의 굽힘강도 향상에 관한 연구)

  • Lee, Jeong-woo;Kim, Ji-Hun;Lim, Dong-Wook;Ha, Seok-Jae
    • Design & Manufacturing
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    • v.16 no.1
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    • pp.50-54
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    • 2022
  • Coverglass of electronic equipments is thinner and slimmer, so the glass must have good bending strength. In these days, the polishing edge of glass is used by solid tool like grinding wheel. But solid tool leave micro crack or edge chipping in edge of glass. MR polishing is an optimal method by polishing edge of glass. MR polishing is used MR fluid that is a liquid tool. MR polishing doesn't leave tool path or residual stress, micro crack and edge chipping unlike grinding wheel polishing. In this paper, the results of grinding and MR polishing were compared and analyzed to improve bending strength by minimizing edge chipping of cover glass. It was derived that the depth and size of cracks have a significant influence on the bending strength of the glass edge. The edges of the glass using MR grinding were analyzed to have a better surface and higher bending strength than the glass using abrasive wheel grinding. It was confirmed that MR polishing had an effect on strength improvement by effectively removing cracks in the specimen.