Influence of Configuration Error in Bolted Joints on Detection Error of Clamp Force Detection Method
Shinji Hashimura*,, Hisanori Sakai*, Kai Kubota*, Nozomi Ohmi*, Takefumi Otsu**, and Kyoichi Komatsu***
*Shibaura Institute of Technology
3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan
**Oita University, Oita, Japan
***Tohnichi MFG. Co., Ltd., Tokyo, Japan
Clamp force errors in bolted joints often cause accidents in various mechanical structures. Therefore, the clamp force must be controlled accurately and maintained for securing the reliability of mechanical structures such as vehicles. However, the clamp force cannot be controlled easily during tightening. Moreover, it is difficult to detect the clamp force after tightening. We previously proposed a method to easily detect the clamp force of a bolted joint that has been tightened. In that method, the bolt thread protruding from the nut is pulled while the nut’s upper surface is supported. The relationship between tensile force and displacement at the pulling point where the tensile force is applied differs before and after the tensile force reaches the clamp force. The method detects the tensile force at the point, where the relationship changes, as the clamp force. In this study, we investigate the influence of squareness error on the bearing surface of the clamped part in a bolted joint on the detection error of the method using experiments and finite element (FE) analysis. The experimental results show that the squareness error has an influence on the detection accuracy. The average detection error in the experiments increases by approximately 10% with an increase in the squareness error. To understand the cause of this phenomenon, we investigate the effects of backlash between mating thread surfaces of bolts and nuts on the detection error. The results show that the error decreased because of the backlash. Consequently, it is assumed that the error is caused by the non-separation of the mating thread surfaces when the tensile force reached the clamp force. Furthermore, the FE analysis results show that the squareness error on the bearing surface of the clamped part has an influence of the squareness error on the detection accuracy. The results indicate that we should control the tolerance of squareness errors on the bearing surface of the clamped part when the clamp force detection method is applied to bolted joints.
-  M. Hagiwara and T. Kawamura, “Development of a Solid Bolt/Nut Model Utilized in 3D-FE Structural Analysis for Bolted Joints,” J. of Advanced Mechanical Design, Systems, and Manufacturing, Vol.12, No.1, pp. 1-11, 2018.
-  J. H. Bickford, “Mechanical Engineering: An Introduction to the Design and Behavior of Bolted Joints No 70, 2nd Edition, Revised and Expanded,” pp. 127-131, Marcel Dekker Inc., 1990.
-  Verein Deutscher Ingenieure, “VDI 2230 Part 1,” 2014.
-  S. Hashimura, “Influences of Various Factors of Bolt Tightening on Loosening-Fatigue Failure Under Transverse Vibration,” SAE 2007 Trans. J. of Materials and Manufacturing, Vol.116, No.5, pp. 262-270, 2007.
-  S. Hashimura and D. F. Socie, “A Study of Loosening and Fatigue Failure of Bolted Joints Under Transverse Vibration,” Trans. of the Japan Society of Mechanical Engineers, Part C, Vol.72, No.716, pp. 1297-1304, 2006.
-  Asahi Shimbun, News Paper Morning Edition, March 19th 2002, 35, 2002 (in Japanese).
-  Ministry of Land, Infrastructure, Transport and Tourism, “Press Release Report: The Number of Accidents that Wheels Fallen off by Wheel Bolt Failure in 2010” (in Japanese). http://www.mlit.go.jp/report/press/jidosha09_hh_000039.html [Accessed November 30, 2013]
-  Japanese Standard Association, “General rules for tightening of threaded fasteners” Japanese Industrial Standard (JIS), B 1083, 2008.
-  M. Zhang, Y. Jiang, and C.-H. Lee, “An Experimental Investigation of the Effects of Clamped Length and Loading Direction on Self-Loosening of Bolted Joints,” J. of Pressure Vessel Technology, Vol.128, No.3, pp. 388-393, 2006.
-  Y. Jiang, J. Chang, and C.-H. Lee, “An experimental study of the torque-tension relationship for bolted joints,” Int. J. of Materials and Product Technology, Vol.16, Nos.4-5, pp. 417-429, doi: 10.1504/IJMPT.2001.001264, 2001.
-  K. Mori, S. Hashimura, Y. Murakami, and K. Mineki, “A New Tightening Method for Bolted Joints by Simultaneous Application Torque and Compressive Force,” SAE 2001 Trans. J. of Materials and Manufacturing, Vol.110, No.5, pp. 818-824, 2001.
-  S. A. Nassar, G. C. Barber, and D. Zuo, “Bearing Friction Torque in Bolted Joints,” Tribology Trans., Vol.48, No.1, pp. 69-75, doi: 10.1080/05698190590899967, 2005.
-  Q. Zou, T. S. Sun, S. A. Nassar, G. C. Barber, H. El-Khiamy, and D. Zhu, “Contact Mechanics Approach to Determine Effective Radius in Bolted Joints,” J. of Tribology, Vol.127, No.1, pp. 30-36, doi: 10.1115/1.1829717, 2005.
-  M. Hagiwara and N. Ohashi, “A New Tightening Technique for Threaded Fasteners,” J. of Ocean, Offshore and Arctic Engineering; Vol.116, No.2, pp. 64-69, 1994.
-  T. Fukuoka and T. Takaki, “Mechanical Behaviors of Bolted Joint during Tightening Using Torque Control,” Trans. of JSME, Series A, Vol.63, No.609, pp. 205-210, 1997 (in Japanese).
-  Q. Zou, T. S. Sun, S. A. Nassar, G. C. Barber, and A. K. Gumul, “Effect of Lubrication on Friction and Torque-Tension Relationship in Threaded Fasteners,” Tribology Trans., Vol.50, No.1, pp. 127-136, doi: 10.1080/10402000601105490, 2007.
-  D. Croccolo, M. D. Agostinis, and N. Vincenzi, “Influence of tightening procedures and lubrication conditions on titanium screw joints for lightweight applications,” Tribology Int., Vol.55, pp. 68-76, 2012.
-  D. Croccolo, M. D. Agostinis, S. Fini, and G. Olmi, “Tribological properties of bolt depending on different screw coating and lubrications: An experimental study,” Tribology Int., Vol.107, pp. 199-205, 2017.
-  K.-Y. Jhang, H.-H. Quan, J. Ha, and N. Y. Kim, “Estimation of clamping force in high-tension bolts through ultrasonic velocity measurement,” Ultrasonics, Vol.44, pp. e1339-e1342, 2006.
-  N. Hosoya, T. Hosokawa, I. Kajiwara, S. Hashimura, and F. Huda, “Evaluation of the Clamping Force of Bolted Joints Using Local Mode Characteristics of a Bolt Head,” J. of Nondestructive Evaluation, Vol.37, No.4, 75, 2018.
-  S. Hashimura and K. Komatsu, “Development of New Detecting Method of Clamping Force of Bolted Joint,” Proc. of the 14th Asia Pacific Automotive Engineering Conf. (APAC14), 07APAC-347, 2007.
-  S. Hashimura, Y. Sekido, and K. Komatsu, “Development of Clamp Force Detection Wrench for Bolt/Nut Assemblies,” Proc. of the 6th JSME/ASME 2017 Int. Conf. on Materials and Processing (ICM&P2017), ICMP2017-4315, 2017.
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