• 제목/요약/키워드: Roundness measurement

검색결과 47건 처리시간 0.027초

하이브리드 측정기의 개발 및 성능평가 (Development and Performance Evaluation of Hybrid Measuring Instrument)

  • 이영호;박기범;조영태;이응석;정윤교
    • 한국기계가공학회지
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    • 제16권3호
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    • pp.69-75
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    • 2017
  • There are two types of expensive measuring instruments currently on the market shape measurement and roundness measurement instruments. As they are very expensive, from tens of millions to more than 200 million won, buying them is economically burdensome for small companies or individuals. Therefore, in order to integrate the shape and roundness measurements into a single transfer device, this study aimed to reduce the trial and error by 3D modeling and simulation, and we confirmed the feasibility of operation. Based on these outcomes, a prototype hybrid measuring instrument was fabricated. As a result of performance evaluation and comparative evaluation, we verified the feasibility of implementation and application of the hybrid measuring instrument.

Rotational Accuracy Measurement of Scroll Compressor with D-type Sectional Shaft

  • Park, Sang-Shin;Kim, Gyu-Ha;Lee, Jin-Kab
    • 한국윤활학회:학술대회논문집
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    • 한국윤활학회 2002년도 proceedings of the second asia international conference on tribology
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    • pp.125-127
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    • 2002
  • This paper presents the measurement process of the rotational accuracy and the comparison with the theoretical results in the main bearing of scroll compressor. The main bearing is cylindrical oil proceeding bearing, but there are straightly cut used for oil supply. Therefore the roundness error is not a negligible quantity compared with the rotational accuracy. For this reason, three-point method is used in the experiment. The result of three-point method coincides with the theoretical value. So if the theory in this paper is used to the bearing design of scroll compressor, the efforts for testing and designing can be reduced.

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Development of a Laser-Guided Deep-Hole Evaluating Probe: Measurement of Straightness and Roundness

  • K, K.-Wong;Akio, Katuki
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2001년도 ICCAS
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    • pp.96.5-96
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    • 2001
  • The probe with a 110mm diameter is originated and fabricated to measure hole accuracies of extremely deepholes. It consists of a measuring unit, an actuator unit, an active rotation stopper and a feed unit. The rolling of the probe is restricted and adjusted by the active rotation stopper. The probe is fed by the feed unit. In this measurement, accuracies are measured by using a rolling proof apparatus and machine table of deep hole boring machine instead of the stopper and the feed unit, respectively. Straightness, roundness and a diameter of a 110-mm hole are measured by the probe and testers made for each measuring purpose ...

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CNC 공작기계 상에서 접촉식 측정 프로브를 이용한 홀 측정 프로그램 개발 (Development of Hole Inspection Program using Touch Trigger Probe on CNC Machine Tools)

  • 이찬호;이응석
    • 대한기계학회논문집A
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    • 제36권2호
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    • pp.195-201
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    • 2012
  • 다양한 소비자의 요구에 따라 가공된 제품을 좀더 신속하고 정확하게 측정할 수 있는 공작기계 내 자동계측장치를 적용하는 사례가 급격히 증가하고 있다. 자동 계측으로 가장 많이 활용되는 접촉식 측정 프로브는 주로 공작물의 가공 원점을 설정하고, 정확한 치수 검사를 통한 불량유무 판정 및 보상가공에 많이 활용된다. 따라서 본 연구에서는 기기상 자동계측장치인 접촉식 측정 프로브를 활용하여 가공된 형상을 신속하고 정확하게 측정하는 방법을 연구하였으며 이를 위하여 가장 많이 활용되는 홀 측정 사이클에 대한 매크로 프로그램을 개발하였다. 또한 측정 시 홀의 진원도 오차에 따라 발생할 수 있는 편심량을 시뮬레이션하여 분석하였으며 본 연구의 신뢰성을 높이기 위하여 기기상에서 개발된 홀 측정 매크로 프로그램을 이용하여 홀플레이트에 대한 측정이 이루어졌으며, 진원도 오차에 따른 편심량을 검증하였다.

백색광간섭계를 이용한 금형용 강재 구멍가공면의 조도 측정 (Roughness Measurement of Hole Processing Surface for Mold Steel Using White Light Interferometer)

  • 이승철;김경석
    • 비파괴검사학회지
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    • 제33권1호
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    • pp.73-79
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    • 2013
  • 본 실험에서는 NIMAX재료를 3차원 측정기 및 백색광간섭계를 이용, 진원도 측정과 표면조도 측정을 하여 다음과 같은 결과를 얻었다. 절삭특성은 재료의 경도가 큰 관계로 2F의 조건보다 4F의 조건에서 낮게 나타났으며, 주축 회전수 및 공구 이송이 낮을수록 양호하게 나타났다. 3차원 측정기를 통한 진원도 측정은 절삭분력과 같은 4F 조건에서 양호하게 나타났으며, 주축회전수 1,700 rpm, 공구이송속도 85 mm/min의 조건에서 진원도는 양호한 결과를 보였다. 가공면의 표면거칠기는 2F 조건보다 4F의 조건에서 양호하게 나타났으며, 주축회전수 1,700 rpm, 공구이송속도 55 mm/min의 조건에서 Ra $0.4025{\mu}m$값을 보였다.

원통 플런지 연삭시 연삭력에 관한 실험적연구 (Monitoring of Grinding Force in Plunge Grinding Process)

  • 박종판;박철우;이상조
    • 대한기계학회논문집A
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    • 제23권6호
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    • pp.881-894
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    • 1999
  • Cylindrical plunge grinding is widely used for final machining process of precision parts such as automobile, aircraft, measurement units. But in order to make parts which have high precision accuracy and high surface integrity, it is necessary to consider grinding characteristics due to accumulation phenomena of grinding wheel in plunge grinding process. In this study, in order to examine closely plunge grinding process, grinding power, grinding force, real depth of cut are monitored in transient state, steady state and spark out state. As the result, it is shown that grinding power and force are affected by dressing condition, depth of cut and speed ratio and that there exist threshold grinding force and it also affected by dressing condition. Also considered effects of grinding conditions on surface roughness and roundness of workpiece

자기베어링용 로우터의 형상 오차에 대한 실린더형 캐패시턴스 센서의 측정특성에 관한 연구 (A Study on the Measurement Characteristics of Cylindrical Type Capacitive Transducers to the Roundness Errors of Rotor for Magnetic Bearing)

  • Lee, S.H.;Jung, S.C.;Han, D.C.
    • 한국정밀공학회지
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    • 제12권3호
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    • pp.23-31
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    • 1995
  • The sending characteristics of the non-contact type displacement transducers can affect the performances of the magnetic bearing systems when they support the rotating shaft. The probe type displacement sensor detects not only the displacement of the rotor at the sensing position but also the surface irregularitis of the rotor such as surface roughnessand roundness errors. If there exist such measuring errors, the magnetic bearing can not apply proper force against the rotor displacements for the detected signal is the input to the magnetic bearing controllers. The cylindrical shape capacitive transducer can detect the rotor displacement by the integral sum of the charges which are formed between the sensor plates and rotor so that it can reduce the detecting errors induced by the surface irregularities of the rotor. By theore- tical analysis, we compared the sensing characteristics of the cylindrical shape capacitive transducers for the rotors that have some sinusoidal irregularities with that of the ideal probe type displacement transducers.

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모아레 원리를 이용한 스핀들의 반경방향 회전정도 측정 (Measurement of Radial Error Motions of a Rotating Spindle by Moire Topography)

  • 박윤창;김승우
    • 대한기계학회논문집
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    • 제17권11호
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    • pp.2723-2729
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    • 1993
  • Moire principles are applied to the measurement of the spindle radial error motion. As opposed to conventional techniques, no master cylinder or ball is needed in the measurement so that the offset and out-of-roundness errors of the master can be inherently eliminated. Two periodic circular gratings are used, one is made on the spindle and the other is held stationary on the reference frame. When the two gratings are seen superimposed during spindle rotation, an interference fringe pattern is observed from which the information on the eccentricity between the two gratings can be extracted with high precision. The optical design and fringe analysis techniques of a prototype measurement system are described in detail with exemplary measurement results.

피스톤 측정 시스템 개발에 관한 연구 (A Study on the Development of Pistion Measuring System)

  • 김경석
    • 한국생산제조학회지
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    • 제6권2호
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    • pp.19-25
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    • 1997
  • The purpose of this study is the development of professional measuring system of piston. Designed values are compared with values of measured data of oval shape piston and allowable range and deviation are printed out by using this system. Thereafter, it is able to measure ovality precisely and to estimate its quality rapidly.

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주축의 회전정도 측정시스템의 개발 (Development of the Measuring System of the Rotational Accuracy of main Spindles)

  • 신영재;박종권;이후상
    • 한국기계연구소 소보
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    • 통권20호
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    • pp.21-26
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    • 1990
  • In order to satisfy the industrial requirements to measure the rotational error motion of main spindles and to find out the source of the error motion, some measuring systems were made. Their measuring principle are based on the 3-point roundness measurement. In these measuring systems, the measurements are processed by digital calculation technique and the form error and the rotational error motion of main spindles are spearated. In the present paper, the principle of 3-point metnod is introduced and some application examples are shown.

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