Anti-Loosing Performance of Special Bolts and Nuts Having Enhanced Fatigue Life by Introducing Pitch Difference


A slight pitch difference is considered between the bolt and nut in this study. Here, the pitch of nut is α μm larger than the pitch of bolt. For four different levels of α , the loosening experiment is performed. Considering both the antiloosening ability and the clamping ability of the nut, the desirable range of α is discussed. Based on the loosening experimental results, several levels of α are selected in order to clarify the effect of the pitch difference on the fatigue life of bolt. The most desirable pitch difference is discussed in terms of improving both anti-loosening and fatigue life.本研究では微小ピッチ差を設けたボルト・ナット締結体の緩み止め効果の向上を目標としている.ピッチ差によるプリペリングトルクの発生位置を実験と理論的な方法で求めた.また,軸力とプリペリングトルクの関係について実験で求めた.これらの結果をもとに緩み試験を行って,耐緩みの最適なピッチ差を求めた.


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  • Accession Number: 01665025
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: Mar 30 2018 4:32PM