• 제목/요약/키워드: Grinding technology

검색결과 648건 처리시간 0.025초

연삭시스템의 최적연삭가공조건 (The Optimum Grinding Condition Selection of Grinding System)

  • 이석우;최영재;허남환;최헌종
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2006년도 춘계학술대회 논문집
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    • pp.563-564
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    • 2006
  • In silicon wafer manufacturing process, the grinding process has been adopted to improve the flatness of water. The grinding of wafer is usually used by the infeed grinding machine. Grinding conditions are spindle speed, feed speed, rotation speed, grinding stone etc. But grinding condition selection and analysis is so difficult in grinding machine. In the intelligent grinding system based on knowledge many researchers have studied expert system, neural network, fuzzy etc. In this paper we deal grinding condition selection method, Taguchi method and Genetic Analysis.

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단속 연삭지석에 의한 스테인레스강의 연삭특성에 관한 연구 (A Study on the Grinding Characteristics of Stainless Steel Using Intermittent Grinding Wheel)

  • 권오병;김정두
    • 대한기계학회논문집A
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    • 제20권9호
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    • pp.2866-2874
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    • 1996
  • In the grinding of difficult-to-materials, the major problmes of conventional grinding are grinding burn, wheel wear, grinding surface crack, loading and glazing, When a conventioanl grinding wheel is used, wheel wear and grinding surface crack easily occur in low heat conductive material and annealed steel. Intermittent grinding is suitable for diffcult-to-matrical such as stainless steel, titanium alloy, aluminum alloy and copper alloy. The purpose of this paper is to develop a new type intermittent wheel of the grinding system for improving the problem of stainless steel grinding, to observe the effect of intermittent grinding on surface quality and grinding characteristics of stainless steel grinding using intermittent grinding wheel. The characteristics of intermittent grinding system improve surface quality, low grinding temperature and low loading.

A Study on the Surface Integrity of Grinding of Ceramics

  • Lee, Jongchan;Whan Chio;Woojin Sim;Yongky Kang;Eunha Hwang;Lee, Taewon;Sangbaek Ha;Kim, Sunghun
    • 한국공작기계학회논문집
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    • 제10권3호
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    • pp.90-96
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    • 2001
  • Experimental investigations were carried out to find the characteristics of grinding of ceramics. Grinding mechanisms of ceramics were inspected through the microscopic examination. It has been found that the specific grinding energy of ceramics is relatively low as compared to that of steels. The specific grinding energy affects the surface roughness and the residual stress of ground surface. the experimental results indicate that the rougher surface finish and higher compressive residual stress are obtained at lower specific grinding energy. The surface roughness and the residual stress of the ground surface have significant effects on the strength of ground piece of ceramics.

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평면 연삭에서의 연삭 숫돌 마모 추정 및 실험적 검증 (Estimation and Experimental Verification of Grinding Wheel Wear in Surface Grinding Process)

  • 주광훈;이응숙;김현수;홍성욱;박천홍
    • 한국정밀공학회지
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    • 제18권8호
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    • pp.150-156
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    • 2001
  • This paper deals with the theoretical estimation and its experimental verification of grinding wheel wear in surface grinding process. A theoretical formulation is provided to predict the grinding wheel wear in surface grinding. To validate the theoretical prediction, the grinding wheel wear is measured by using a laser scanning micrometer. The associated surface roughness and grinding farce are also investigated both theoretically and experimentally. Through a series of simulations and experiments, it is shown that the predictions are in good agreement with the experimental results.

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연삭동력에 의한 Grinding Burn 검지를 위한 기초적 연구 (A Basic Study on the Monitoring of Grinding Burn by Grinding Power Signatures)

  • 이재경
    • 한국생산제조학회지
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    • 제6권1호
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    • pp.18-26
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    • 1997
  • Grinding burn formed on the ground surface is related to the maximum temperature of workpiece surface and wheel tempertaure in the grinding process. The thermal characteristics of workpiece and grinding conditions on the surface tempertaure of the oxidation growing layer after get out of contact with the grinding wheel. The assumption used in grinding power signatures leads to the local temperature distribution between grinding wheel and workpiece, i.e., a single curve determines temperatures anywhere within the grinding wheel at anytime. This information is useful in the study of the grinding burn penetration into the wheel and thus provides an presentation of grinding trouble monitoring for the burning. On the basis of grinding power signatures in the wheel, thermally optimum grinding conditions are defined and controlled. To cope with grinding burn, the use of grinding power signatures is an effective monitoring systems when occurring the grinding process. In this paper, the identified parameters suggested in this study which are derived from the grinding power signatures are presented, and prediction model by grinding power utilized a linear regression algorithm is applied.

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대면적 TPS 강화 Cover Glass Grinding 공정 개발에 관한 연구 (A Study on Large Surface TPS Reinforced Cover Glass Grinding Process Development)

  • 이태호;송재철;이선희
    • 한국위성정보통신학회논문지
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    • 제10권3호
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    • pp.48-52
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    • 2015
  • 국내 및 국외 최초 대면적 TSP용 강화 Cover Glass Edge Grinding 공정을 개발하였다. 이를 위해 기존의 Cover Glass Grinding 공정에서 문제가 되고 있는 기술을 중점적으로 연구하여 해결하였고, 생산성 향상과 가공품질을 높이는데도 중점을 두어서 개발하였다. 개발 과정에서는 데모기기의 제작과 운영을 통해 전체 공정 기술을 개발하였다. 개발 결과 강화 Cover Glass Grinding 공정 기술, 영상처리기술, 기구 메카니즘 & 제어 알고리즘 확보하였다.

퀼축강성 변화가 측면 연삭가공에 미치는 영향 (The Effects on a Side-Cut Grinding depend on the Change of the Quill Rigidity)

  • 최환;김창수;박원규;이충석
    • 한국기계가공학회지
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    • 제12권5호
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    • pp.36-41
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    • 2013
  • One of the problems in grinding process using a machining center(MC) with a small diametric wheels is machining error due to decrease of the quill diameter. In this study, side-cut grinding is performed with a vitrified bonded CBN wheel on the machining center. Grinding experiments are performed at various grinding conditions including quill length, quill diameter and depth of cut. The effect on the grinding force, machining error and surface roughness due to the change of the quill rigidity are investigated experimentally. The slenderness ratio of the quill is significant factor to analyse the change of the grinding force and machining error.

머시닝센터를 이용한 내면 스러스트 연삭가공에 관한 연구 (A Study on the Internal Thrust Grinding by Machining Center)

  • 최환;서창연;박원규;이충석
    • 한국기계가공학회지
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    • 제14권4호
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    • pp.55-61
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    • 2015
  • In this paper, the grinding characteristics of internal thrust grinding were studied with vitreous CBN wheels using a machining center. Grinding experiments were performed according to grinding conditions, such as wheel feed speed and depth of cut, workpiece speed, and rate of grinding width. Additionally, the grinding force and grinding ratio were investigated though these experiments. Based on the experimental results, the grinding characteristics of internal thrust grinding were discussed.

한, 일산 연삭 숫돌의 연삭 성능 평가에 관한 연구 (A study on the Grinding Ability Evaluation of Grinding Wheel made in Korea and Japan)

  • 강재훈
    • 한국생산제조학회지
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    • 제5권1호
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    • pp.51-57
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    • 1996
  • Although the system for establishing grinding operation standards mainly depends on the simulation method, it is desirable to obtain highly reliable grinding data and to develop experimental technology, And, it also needs to modify the simulation models if the simulation results do not coincide with special situation due to the difference of grinding machine, wheels and workpiece materials. If simple tests are carried out to evaluate these specificity, the reliability and utility of the system can be raised higher. Therefore, it is required for evaluating wheel ability and confirming the validity of the experimental methods as well as the possibility of exchanging the experimental data between Korea and Japan to preform several kinds of grinding experiments. In this paper, experiments of cylindrical plunge grinding were conducted using the wheels of the same specification made by three typical grinding wheel manufacturers both in Korea and Japan, respectively. The grinding power consumption grinding force, the ground surface roughness, and wheel wear were measured under the same dressing the grinding conditions. The average value and standard deviation of the experiment results were calculated to compared the grinding performance of the wheels made in both countries. The experiment results show that the grinding wheel performance of Korea's is nearly equal to that of Japan's for general purpose of grinding operation. In conclusion, it is possible to exchange the experimental data between Korea and japan.

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LSM을 이용한 연삭 숫돌 마모 모니터링 (Monitoring of Grinding Wheel Wear Using Laser Scanning Micrometer)

  • 주광훈;김현수;홍성욱;박천홍
    • 한국정밀공학회지
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    • 제17권12호
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    • pp.82-87
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    • 2000
  • This paper deals with monitoring of grinding wheel wear in grinding process. A monitoring system is developed in which a laser scanning micrometer is used to measure the circumferential shape as well as the axial shape of grinding wheel. The monitoring system is applied to grinding machines. The experiment results show that the monitoring system is useful not only for monitoring the amount of wear in grinding wheel but also for measuring the apparent diameter of the grinding wheel.

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