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Design and Performance Test of Locking Curved-Nut

풀림방지 Curved-Nut 설계 및 성능 시험

  • Received : 2016.08.22
  • Accepted : 2016.11.05
  • Published : 2017.03.01

Abstract

Many types of locking nut are commercializing in the various industries where has heavy vibration. Because nut's loosing causes a serious accident. But the most locking nuts are too expensive as the complicate manufacturing process. In this study, we design the new type of locking nut, "Curved-Nut" that is relatively simple making process. We study a relation between the elastic energy and the nut loosing mechanism. So it is analysed, the elastic energy of Curved-Nut comparing with the locking test. The Curved-Nut was manufactured on the commercial nut using a milling tool with horizontal cutting, one or two time under the nut. As the result, the more elastic energy the more prevent the loosing of the nut. We verified the performance of the loosing nut using the vibration testing equipment (NAS3350).

Keywords

Locking Nut;Curved-Nut;Elastic Energy;Friction Energy

References

  1. NASA, "NAS(National Aerospace Standard)3350 Manual," 2015, Standards Industry 3. Requirements, 3.4.2.9.
  2. Jung, S.P., Park, T.W., Chung, W.S. and Song, H. S., 2009, "Optimum Design of the Shape of the Spring for a Loose-proof Lock Nut," Proceedings of the KSPE Spring Conference, pp. 149-150.
  3. ANSEL C. UGURAL, 2012, "MECHANICAL DESIGN An Integrated Approach," McGrawHil, pp. 600-627.
  4. Lee, C.W. and Kim, H.J., "Characteristics of Tightening Torque of Self-locking Nuts for KTX Trains," Proceeding of the KSME Fall conference, pp. 3638-3639.
  5. Kim, S.H. and Seok, C.S., "The Comparative Evaluation for Factors Effecting on Anti-loosening of Bolt," Proceeding of the KSME Fall conference, pp. 226-227.