• 제목/요약/키워드: Compensation of Machining Error

검색결과 96건 처리시간 0.03초

PNN을 이용한 가공오차 보상에 관한 연구 (A Study of Machining Error Compensation Using PNN Approach)

  • 서태일;박동삼;홍연찬;조명우;배종석;신장순;김유진
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2006년도 춘계학술대회 논문집
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    • pp.581-582
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    • 2006
  • This paper presents an integrated machining error compensation method based on PNN(Polynomial Neural Network) approach and inspection database of OMM(On-Machine-Measurement) system. To efficiently analyze the machining errors, two machining error parameters are defined and modeled using the PNN approach, which is used to determine machining errors for the considered cutting conditions. Experiments are carried out to validate the approaches proposed in this paper. In result, the proposed methods can be effectively implemented in a real machining situation, producing much fewer errors.

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기상측정시스템과 오차보정을 이용한 가공정밀도 향상 (Machining Accuracy Improvement by On Machine Part Measurement and Error Compensation)

  • 최진필;민병권;이상조
    • 한국정밀공학회지
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    • 제20권12호
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    • pp.34-41
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    • 2003
  • This paper suggests a methodology fur improving the machining accuracy by compensating for the machining errors based on on-machine measurement process. Probing errors and machine tool errors included in the measurement data were calibrated or compensated to obtain the actual machining errors. Machine tool errors were modeled in forward and backward directions according to the axis movement direction to consider the effects of backlash errors on the measurement data, and model parameters were determined by measuring a cube array artifact. A rectangular workpiece was machined and then measured with a touch probe as a verification experiment. Machining experiments showed that the machining errors were reduced to within the designated tolerance after compensating for the actual machining errors by modifying the original footpath for the next-step machining.

축대칭 렌즈 코어의 초정밀 보정가공에 관한 연구 (A Study on the Ultra-precision Compensation Machining of Axisymmetric Lens Core)

  • 강상도;김우순;장광호;박순섭;김동현
    • 한국공작기계학회논문집
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    • 제14권1호
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    • pp.108-114
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    • 2005
  • Code V was used to make a plan for collimator lens with aspherical surface in the present study. The acquired optical design data were applied for ultra-precision machining. The optimum properties were determined to find ways to compensate the tool positioning error allowance during the ultra-precision machining. In ultra-precision aspheric machining, figure tolerance corrected by tool positioning error be improved by compensation cycle number.

마이크로 엔드밀링에서 공구변형 가공오차 보상에 관한 연구 (A Study on Compensation for tool deformation machining errors in micro end-milling)

  • 손종인;송병욱
    • Design & Manufacturing
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    • 제17권4호
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    • pp.24-32
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    • 2023
  • In this study, we introduce research aimed at minimizing machining errors without compromising productivity by compensating for the machining errors caused by tool deformation. Our approach experimentally establishes the direct correlation between cutting depth and machining error, and creates predictive models using mathematical functions. This method allows for the prediction of compensated cutting depths to obtain the desired cutting profiles, thereby maximizing the compensation of machining errors in the cutting process.

머시닝센터의 체적오차 보상을 통한 구면 가공형상 측정 OMM시스템 연구 (A Study of an OMM System for Machined Spherical form Using the Volumetric Error Calibration of Machining Center)

  • 김성청;김옥현;이응석;오창진;이찬호
    • 한국정밀공학회지
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    • 제18권7호
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    • pp.98-105
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    • 2001
  • The machining accuracy is affected by geometric, volumetric errors of the machine tools. To improve the product quality, we need to enhance the machining accuracy of the machine tools. To this point of view, measurement and inspection of finished part as error analysis of machine tools ahas been studied for last several decades. This paper suggests the enhancement method of machining accuracy for precision machining of high quality metal reflection mirror or optics lens, etc. In this paper, we study 1) the compensation of linear pitch error with NC controller compensation function using laser interferometer measurement, 2) the method for enhancing the accuracy of NC milling machining by modeling and compensation of volumetric error, 3) the spherical surface manufacturing by modeling and compensation of volumetric error of the machine tool, 4) the system development of OMM without detaching work piece from a bed of machine tool after working, 5) the generation of the finished part profile by OMM. Furthermore, the output of OMM is compared with that of CMM, and verified the feasibility of the measurement system.

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미세형상 가공을 위한 Micro Slot 가공에서의 공구변형에 의한 가공오차 보상 (Machining Error Compensation for Tool Deflection in Micro Slot-Cutting Processes for Fabrication of Micro Shapes)

  • 손종인;윤길상;서태일
    • 한국공작기계학회논문집
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    • 제17권2호
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    • pp.121-127
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    • 2008
  • Micro end-milling has been becoming an important machining process to manufacture a number of small products such as micro-devices, bio-chips, micro-patterns and so on. Despite the importance of micro end-milling, many related researches have given grand efforts to micro end-milling phenomenon, for example, micro end-milling mechanism, cutting force modeling and machinability. This paper strongly concerned actual problem, micro tool deflection, which causes excessive machining errors on the workpiece. To solve this problem, machining error prediction method was proposed through a series of test micro cutting and analysis of their SEM images. An iterative algorithm was applied in order to obtain corrected tool path which allows reducing machining errors in spite of tool deflection. Experiments are carried out to validate the proposed approaches. In result, remarkable error reduction could be obtained.

정밀 엔드밀링을 위한 실시간 공구처짐 보정시스템 (On-line Tool Deflection Compensation System for Precision End-milling)

  • 양민양;최종근
    • 대한기계학회논문집A
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    • 제21권2호
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    • pp.189-198
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    • 1997
  • This paper presents development of a practical tool deflection compensation system in order to reduce the machining error from the tool deflection compensation system in order to reduce the machining error from the tool deflection in the end-milling process. The devised system is a tool adapter which includes 1-axes force sensor for detecting tool deflection and 2-axes tool tilting device for adjusting tool position through computer interface on line process. Experimental in investigations for typical shaped workpieces representing various end milling situations are performed to verify the ability of the system to suppress the surface errors due to tool deflections. With the system, it is possible to get precise machining surface without any excessive machining error due to increased cutting force in more productive machining conditions.

수평 머시닝 센터의 준 정적 오차의 실시간 보정 (Real time compensation for quasistatic errors of a horizantal machining center)

  • 양승한
    • 한국정밀공학회지
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    • 제14권11호
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    • pp.154-162
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    • 1997
  • A real time error compensation system was developed to improve the quasistatic volumetric accuracy of a machining center by using sensing, metrology, modeling, and computer control techniques. Including thermal errors, 32 error components are formulated in the time-space domain. Fifteen thermal sensors are used to characterize the temperature field of the machine. A compensation controller based on the IBM/PC has been linked with a CNC controller to compensate for machine errors in real time. The maximum linear displacement error in 4 body diagonals were reduced from 140 ${\mu}m$ to 34.5${\mu}m$ with this compensation system, and the spindle thermal drift in space was reduced from 147.3 ${\mu}m$ to 16.8 ${\mu}m$.

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