Research on Gas Pore Prediction Method Based on Sand Core Characteristic Time

DOI

説明

In the production of castings, gas pores are a prevalent defect, particularly in components where air-tightness is crucial, such as cylinder blocks and heads. These defects primarily arise from the intrusion of gases into the casting during the combustion of resin in the sand core. Due to the complexity of the sand core's gas evolution and venting process, predicting gas pores using numerical simulation poses significant computational and time challenges. This paper introduces a rapid prediction method for gas pores based on the characteristic time of the sand core. By setting the heat transfer boundaries, initial conditions, and termination criteria for computation, the thermal conductivity of the sand core is adjusted. The termination computation time is used as the characteristic time of the sand core. This time is then compared with a critical characteristic time to predict the distribution of gas pores. As the analysis of more sand cores is incorporated, the precision of the critical characteristic time improves, leading to more accurate predictions of gas pores in castings.

収録刊行物

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詳細情報 詳細情報について

  • CRID
    1390581456538618624
  • DOI
    10.5954/icarob.2024.os24-4
  • ISSN
    21887829
  • 本文言語コード
    en
  • データソース種別
    • JaLC
    • Crossref
  • 抄録ライセンスフラグ
    使用不可

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