Abstract
Improper clamping of wiper arms can cause problems in the operation of the wiper. An excessive clamping force can cause damage to the wiper arm head. On the other hand, an insufficient clamping force can cause self-loosening of the nut. Given the lack of direct research on the clamping force of the fastener in wiper assembly, this study verifies the existing clamping performance of the fastener in windshield wiper assembly by theoretical and experimental methods. The theoretical calculation results show that all the clamping performance are satisfied under the general snow load condition. However, under the critical load condition, maximum assembly preload and safety margin against slipping are in disagreement with the standard values. This problem is solved by increasing the strength grade of the bolt. The experimental results show a reducing tendency of the clamping force during the snow durability test. However, this reducing clamping force during the 60,000 test cycles is acceptable. In the case of nut reusing more than two times possibly cause a problem of its loosening because of insufficient clamping force. Therefore, it is recommended that the nut should not be reused more than two times.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Bhattacharya, A., Sen, A. and Das, S. (2010). An investigation on the anti-loosening characteristics of threaded fasteners under vibratory conditions. Mechanism and Machine Theory 45, 8, 1215–1225.
Chang, H., Cho, S. and Lee, K. (2006). Procedure development for determination of optimal preload for engine connecting-rod bolts using CAE (Computer- Aided Engineering). Spring Conf. Proc., Korean Society of Automotive Engineers, 1248–1255.
Cho, H. K. (2009). Numerical analysis on the aerodynamic performance of windshield wiper. 2009 the Korean Society of Mechanical Engineers Spring Conf., 38–41.
Kim, D., Lee, K., Lee, S., Jeon, Y. and Oh, B. (2011). Evaluation of leadnut performance for driving seat using strain gauge. 2011 The Korean Society of Automotive Engineers Spring Conf., 81–85.
Kim, S. S., Lee, J. H., Seo, S. H. and Park, I. S. (2005). A study of reuse of plastic region tightening main bearing cap bolt for diesel engine. Fall Conf. Proc., Korean Society of Automotive Engineers, 1884–1890.
Kim, W.-H., Park, T.-W., Chai, J.-B., Jung, S.-P. and Chung, W.-S. (2010). Estimation of contact pressure of a flat wiper blade by dynamic analysis. Trans. Korean Society of Mechanical Engineers A, 34, 7, 837–842.
Lee, C.-H. (2008). Measurement of shear contact characteristics on mechanical joints. Trans. Korean Society for Noise and Vibration Engineering 18, 8, 849–855.
Lee, S. H., Lee, S. W., Hur, N., Choi, W.-N. and Sul, J.-H. (2011). Numerical study on aerodynamic lift on windshield wiper of high-speed passenger vehicles. Trans. Korean Society of Mechanical Engineers B, 35, 4, 345–352.
VDI Department of Product Development and Mechatronics (2003). VDI2230 Part 1: Systematic Calculation of High Duty Bolted Joints; Joints with One Cylindrical Bolt. Verein Deutscher Ingenieure, Düsseldorf.
Yoon, S. J., Yoo, Y. D. and Hong, S. G. (2010). Application of CAE analysis in vehicle wiper system. 2010 the Korean Society of Mechanical Engineers Spring Conf., 104–105.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Chung, J.H., Lee, K.H., Lee, C.H. et al. Clamping performance of fastener in windshield wiper assembly using theoretical and experimental methods. Int.J Automot. Technol. 17, 99–107 (2016). https://doi.org/10.1007/s12239-016-0009-x
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12239-016-0009-x