締結用ボルト軸方向の変形を利用したセルフロック構造の概念設計検討

抄録

Threaded fasteners using bolts are widely applied in industrial field as well as various fields, having loosening problems and causing many accidents. Nuts or the like with spring washers are used as countermeasures against loosening of the screw fastening bodies. However, there remains the problem that efficient loosening prevention method can’t be obtained in the case where increases in the kind of parts and lock nuts can’t be used. In this study, the purpose is to obtain self-loosening preventable threaded fasteners by introducing lateral cuttings on bolt structures. Different patterned lateral-cuttings as applied on bolt structures are introduced through three dimensional CAD modeling tools. Analytical approaches for evaluations on the self-loosening preventable effects of threaded fasteners and strength performance of lateral-cutting applied bolt structures were performed using finite element method and results are reported in this study. Comparing slackness test results with analytical results and more details on evaluating mechanical properties of lateral-cutting applied bolt structures will be executed in future study.