Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
권호 표지
DOI QR코드

DOI QR Code

Design Improvement of Front-End Loader for Tractor to Reduce Stress Concentration and Evaluation of Impact Safety

응력집중 저감을 위한 트랙터용 프론트 로더의 설계개선 및 충격 안전성 평가

  • Lee, Boo-Youn (Dept. of Mechanical & Automotive Engineering, KEIMYUNG UNIV.)
  • 이부윤 (계명대학교 기계자동차공학전공)
  • Received : 2018.02.22
  • Accepted : 2018.03.14
  • Published : 2018.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

The purpose of this study is to evaluate the structural safety of the front-end loader for the 90 kW class of agricultural tractors in impact test conditions. Deformation and stress on the loader under the impact test conditions are analyzed using the commercial finite element analysis software ANSYS. In previous research dealing with the initial design of the loader, the maximum stress occurred in the mount and exceeded the yield strength of the material. In this paper, an improved design of the mount of the loader was proposed to reduce the stress concentration in the initial design. The safety of the improved design was verified by performing rigid-body dynamics analysis, transient structural analysis, and static structural analysis under three impact test conditions: a drop and catch test, a corner pull test, a corner push test. It was found that the local stress concentration in the mount that appeared in the initial design was greatly reduced in the improved design, and that the maximum stresses occurred in the three impact test conditions are smaller than the yield strength. It is expected that the design improvement of the mount proposed in this study and the method of analysis may be effectively used to enhance structural safety in the development of new model front loaders in the future.

Keywords

References

  1. Cho, B. J., Ahn, S. W., Lee, C. J., Yoon, Y. H., Lee, S. S. and Kim, H. J., "Improved Design of Hydraulic Circuit of Front-end Loader for Bump Shock Reduction of an Agricultural Tractor," Journal of Drive and Control, Vol. 13, No. 2, pp. 10-18, 2016. https://doi.org/10.7839/KSFC.2016.13.2.010
  2. Lim, G. S. and Lee, B. Y., "Study on the Impact Analysis of Front Loader for Tractor," Journal of Korea Academia-Industrial Cooperation Society, Vol. 16, No. 8, pp. 5051-5059, 2015. https://doi.org/10.5762/KAIS.2015.16.8.5051
  3. Ahn, S. W., Kim, H. J., Lee, S. S. and Choi, D. S., "Study on Driving Shock Reduction of a Front End Loader by Accumulator," Proc. of Spring Conference of Korean Society for Agricultural Machinery, Vol. 19, No. 1, pp. 91-92, 2014.
  4. Cho, H. D., "Development of Loader with Four Wheel Driving and Four-Type Wheel Steering System," Journal of Korean Society of Manufacturing Process Engineers, Vol. 3, No. 3, pp. 71-78, 2004.
  5. Go, K. E., Kim, H. W., Bae, J. G., and Yoo, W. S., "Dynamic Analysis of an Wheel Loader Manipulator by Experimental Data," Proc. of the KSME 2004 Spring Annual Meeting, pp. 881-886, 2004.
  6. Chung, W. J., Oh, J. S., Park, Y., Kim, D. C., and Park, Y. J., "Optimization of the Suspension Design to Reduce the Ride Vibration of 90kW-Class Tractor Cabin," Journal of Korean Society of Manufacturing Process Engineers, Vol. 16, No. 5, pp. 91-98, 2017. https://doi.org/10.14775/ksmpe.2017.16.5.091
  7. Park, J. Y., Yoo, W. S., Kim, H. W., Hong, J. M. and Ko, K. E., "Three Dimensional Modeling and Simulation of a Wheel Loader," Proc. of the KSME 2004 Spring Annual Meeting, pp. 870-874, 2004.
  8. Han, Y. H., "Development of the Wheel Loader Front Linkage Retaining High Breakout Force and Small Angle Change of an Attachment," A Thesis for MS, Seoul National University, Republic of Korea, 2012.
  9. Cho, J. U., Min, B. A. and Han, M. S., "Basic Study on Impact Analysis of Automobiles," Journal of Korean Society of Manufacturing Process Engineers, Vol. 8, No. 1, pp. 64-70, 2009.
  10. Kwon, G. B. and Shin, D. Y., "Optimum Design of Mini Loader Using the Design of Experiment", Transaction of Korean Society of Mechanical Engineers A, Vol. 35, No. 6, pp. 693-699, 2011. https://doi.org/10.3795/KSME-A.2011.35.6.693
  11. Park, Y. J., Shim, S. B. and Nam, J. S., "Experimental Study on Driving Shock Reduction of a Front End Loader by Accumulator," Journal of Biosystems Engineering, Vol. 41, No. 3, pp. 153-160, 2016. https://doi.org/10.5307/JBE.2016.41.3.153
  12. ANSYS, ANSYS Workbench User's Manual, Revision 11.0, ANSYS Inc. 2007.
  13. Rockey, K. C., Evans, H. R., Griffiths, D. W. and Nethercot, D. A., The Finite Element Method, Crosby Lockwood Staples, pp. 216-220, 1975.