X線CTデータを用いた鋳造部品の鋳巣体積算出法 A Method for Calculating Volume for Casting Defects Using X Ray CT Data

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Author(s)

Abstract

Calculating volume of defects in casting objects is important for high quality manufacturing. It can be estimated by using X-ray CT scanner that is a non-destructive measurement device. However, conventional methods cannot detect tiny defects based on simple thresholding method. This is because not only their CT values do not fall down to the value of background but also they appear like one set in CT images. As a result, we do not take into account such tiny defects and their calculation accuracy is comparatively low. In this paper, we propose a more accurate method to calculate casting defects' volume. We define two types of defect by their size and apply different calculation models to each defect. We propose a method to separate each defect from the set of defect based on assumption that a tiny defect is approximation of sphere. Our contribution is to detect tiny defects which are not detected or calculated correctly in conventional method and to calculate their volume. This paper also demonstrates more accurate estimation of defects' volume using measured CT data.

Journal

  • Journal of the Japan Society for Precision Engineering

    Journal of the Japan Society for Precision Engineering 76(8), 960-965, 2010

    The Japan Society for Precision Engineering

Codes

  • NII Article ID (NAID)
    130000421900
  • NII NACSIS-CAT ID (NCID)
    AN1003250X
  • Text Lang
    UNK
  • ISSN
    0912-0289
  • NDL Article ID
    10802522
  • NDL Source Classification
    ZN12(科学技術--機械工学・工業--精密機械)
  • NDL Call No.
    Z16-466
  • Data Source
    NDL  J-STAGE 
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