• 제목/요약/키워드: CBN 연삭숫돌

검색결과 15건 처리시간 0.031초

LM가이드 내경연삭을 위한 CBN 숫돌 선정 (Selection of CBN-Wheel for Internal Grinding of LM-Guide)

  • 구양;허정식
    • 한국기계가공학회지
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    • 제2권4호
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    • pp.40-45
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    • 2003
  • In this paper, to choose the optimum CBN wheel for Internal Grinding at LM Guide, among 7 types of CBN-wheels, the 2 types of CBN-wheels, which were the macrofracture CBN wheel and the microfracture CBN wheel, have been used, and the SCM420H have been used as the workpiece. The working conditions in the grinding experiments were depth-of-cut, table speed, and spindle speed for 4 types of the CBN grinding wheels, 2 types of the lubrications. By the experiments, the loading effect of the microfracture types of the CBN-wheel needed a short dressing interval and resulted in grinding wheel wear and bad surface roughness. However, a macrofracture type of CBN-wheel with the concentration of 100, CB120Q100V showed the best surface roughness quality at a low table speed for internal grinding at LM-guide.

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전착 CBN 반구형 숫돌에 의한 측면 연삭가공 (The Side-Cut Grinding by the Electrodeposited CBN Wheel of a Hemispheric Type)

  • 서영일;김창수;이종찬;정선환
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1995년도 추계학술대회 논문집
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    • pp.38-42
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    • 1995
  • In this paper, a theoretical analysis is presented on the mechanics for the side-cut grinding by electrodeposited CBN wheel of a hemispheric type. Each of the grinding force components is calculated by using the geometrical model. It is also presented that experimental results show grinding forces for grinding variable such as wheel speed, feed speed,depth of cut, and grinding wheel positions. The experimental results are found to be in good agreement with those predicted by the analytcal calculation.

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CBN 숫돌에 의한 측면연삭가공에 관한 연구 (A Study on the Side-Cut Grinding using the CBN Wheels)

  • 이충석;김창수;박원규;이종찬;최환
    • 한국기계가공학회지
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    • 제11권3호
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    • pp.98-103
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    • 2012
  • One of the problems in the grinding process using the machining center(MC) with a small diametric wheels is machining error due to decrease of the quill diameter. In this thesis, side-cut grinding is performed with a vitrified bonded CBN wheel on the machining center to establish the basis of the grinding using MC. The grinding force and machining error are investigated experimentally for the change of the machining condition. It is possible to estimate the machining performance by the ratio of the setting depth of cut and actual depth of cut. In addition, the relation between normal grinding force and machining error is presented by the experimental formula.

MC를 이용한 측면 연삭에 관한 연구 (A Study on the Side-cut Grinding using the Mactining Center)

  • 김창수;서영일;정선환;이종찬
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1997년도 춘계학술대회 논문집
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    • pp.900-904
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    • 1997
  • A problem in the grinding process using the machining center(MC) with a small diametric wheel is the machining error due to due to decrease of quill diameter. In this paper, a side-cut grinding is performed with a vitrified bonded CBN wheel by the MC, and the relation between grinding force and machining error for grinding conditions is investigated experimentally. It is show that the normal force has a significant effect on the machining error.

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CBN과 WA숫돌에 의한 연삭에서 연삭력과 표면거칠기 특성 (Characteristics of Grinding Force and Surface Roughness by CBN and WA Wheel)

  • 하만경;곽재섭;양재용;정영득;심성보;류인일
    • 한국공작기계학회논문집
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    • 제11권1호
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    • pp.26-31
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    • 2002
  • In this study an experimental investigation was conducted to find the grinding characteristics of ceramics, STD11 and STS304 materials. The grinding force and the microscopic observation of the workpieces were obtained in surface grinding. Grinding characteristics of ceramics were inspected through the microscopic examination the cutting force, and the surface roughness. It has been found that the finding force of ceramics is relatively low as compared to that of steels and that CBN wheel has an excellent performance. The surface roughness was measured according to the feedrate and the depth of out.

CBN 연삭숫돌의 초음파 인프로세스 드레싱 기법 (A Study on the Ultrasonic In-Process Dressing Method of CBN Grinding Wheel)

  • 이석우;정해도;최헌종
    • 한국정밀공학회지
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    • 제17권2호
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    • pp.43-50
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    • 2000
  • A CBN wheel was used for the highly efficient and precision grinding of the mold material(STD11). The grinding form accuracy by a CBN wheel is very excellent due to its low wheel wear, but grinding fragments resemble fine powders rather chips. A fine powders by this fragmentation can easily get attached to the wheel surface and therefore causing a loading. In order to prevent this fragmentation phenomena, the alumina stick is use to processing. Because the dressing with alumina stick should be interrupted for a processing, the automation of the processing and high productivity was very difficult. The investigation on the effect of Ultrasonic In-Process Dressing(ULID) on the grinding characteristics focuses in this Paper. This ULID method is that ultrasonic vibration in my Position of wheel is used to remove impurities on the wheel surface. Finally, the rate of surface roughness change in grinding by the ULID method was less than grinding without ultrasonic vibration. Loading phenomena by the ULID method were more prevented than grinding without ultrasonic vibration.

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내면 플런지 연삭에 있어서 연삭력 특성에 관한 연구 (A Study on the Grinding Force Characteristics in the Internal Plunge Grinding)

  • 서영일;허만승;최환;이종찬;정선환
    • 한국정밀공학회지
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    • 제16권12호
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    • pp.54-59
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    • 1999
  • High precision internal plunge grinding is difficult because of the decrease in the quill stiffness due to the small diameter of wheel. In this paper, the characteristics of internal plunge grinding were investigated. Grinding experiments were performed at various grinding conditions with vitrified bonded CBN wheels. The grinding period was assumed to be consisted of rough grinding and fine grinding. The classification of grinding was determined int terms of the normal grinding forces and actual depth of cut. The experimental results indicate that the higher depth of cut and infeed speed result in the longer rough grinding time. The maximum normal grinding force was nearly equal to the static force and it decreases exponentially as the grinding continues.

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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.

CBN 숫돌을 이용한 연삭에서 표면거칠기와 연삭력 평가 (Evaluation of Surface Roughness add Grinding Force Using CBN Wheel)

  • 하만경;곽재섭;이영석;구양;윤문철
    • 한국정밀공학회지
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    • 제19권2호
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    • pp.58-64
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    • 2002
  • In these days, according to increasing the technical development, the dimension of a product goes up for ultra-precision. For the net shape manufacturing, grinding is a important process that influences directly the accuracy and the integrity of produced products. In this study, an experimental evaluation was carried out. Workpiece materials were used STD11, SUS304, and STB2 in accordance with varing condition of feedrate and depth of cut. From measuring the grinding force and the surface roughness, material characteristics of grinding by using CBN wheel were examined.

CBN 숫돌을 이용한 연삭에서 공작물의 표면성상 분석 (Analysis on Surface Characteristics of the Workpiece in the Grinding by CBN Wheel)

  • 이영석;곽재섭;하만경;구양;윤문철
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2001년도 춘계학술대회 논문집
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    • pp.1105-1108
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    • 2001
  • In these days, according s the increase of technological development the part demension goes up for ultra-precision. It is grinding behavior that is important processing which directly influences by machining accuracy at product quality with the net shape manufacturing. In this study, by using CBN wheel an analysis carried out for workpiece's profiles and its characteristics by measuring grinding force and surface roughness. Workpiece materials were used STD11, SUS304 and STB2 varing condition of feedrate and depth of cut.

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