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The assessment of the probability of tool failure is based on determining the statistical characteristics of the strength of the tool material - the mathematical expectation of the yield strength and its standard deviation, as well as the maximum principal stress of the tool in the contact zone. The probability of failure of PcBN based tools during impact oblique cutting with a radius cutting edge was calculated. It was established that the presence of an impulse load during impact processing of hardened steels significantly increases the probability of brittle failure of tools. The use of angles λ = 40–50° during impact cutting significantly reduces the probability of brittle failure of PcBN based tools during intermittent machining.

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Probability of Cutting Tool Failure in Intermitten Machining

  • 会议论文

  • 发表日期：

    2025年

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  • Artem Naidenko,
  • Serhii Riabchenko,
  • Oleg Golovatenko,
  • Kateryna Kamchatna-Stepanova

摘要

The assessment of the probability of tool failure is based on determining the statistical characteristics of the strength of the tool material - the mathematical expectation of the yield strength and its standard deviation, as well as the maximum principal stress of the tool in the contact zone. The probability of failure of PcBN based tools during impact oblique cutting with a radius cutting edge was calculated. It was established that the presence of an impulse load during impact processing of hardened steels significantly increases the probability of brittle failure of tools. The use of angles λ = 40–50° during impact cutting significantly reduces the probability of brittle failure of PcBN based tools during intermittent machining.