Journal of Biosystems Engineering

Korean Society for Agricultural Machinery (한국농업기계학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on Rotary Weeding Blade Installation Angle for Reduction of Hand Vibration in Working Type Cultivator

  • Kwon, Tae Hyeong (Dept. of Biosystems Engineering, Seoul National University) ;
  • Kim, Joonyong (Dept. of Biosystems Engineering, Seoul National University) ;
  • Lee, Chungu (Dept. of Biosystems Engineering, Seoul National University) ;
  • Kang, Tae Gyoung (Dept. of Agricultural Engineering, National Academy of Agricultural Science, Rural Development Administration) ;
  • Lee, Byeong-Mo (Dept. Of Organic Agriculture, National Academy of Agricultural Science, Rural Development Administration) ;
  • Rhee, Joong-Yong (Dept. of Biosystems Engineering, Seoul National University)
  • Received : 2013.11.20
  • Accepted : 2014.02.19
  • Published : 2014.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

Purpose: Walking type cultivator used for weeding generated excessive handle vibration as well as bouncing motion depending on the weeding speed. This research was conducted to define a design factor of the rotary weeding blades for reducing soil reaction forces as well as hand vibration. Methods: The motion and forces acting on the rotary blades were reviewed to find out the most influencing parameter on hand vibration. The installation angle (IA) of the blade was selected and analyzed to determine the condition of no reaction force less. For removing the unnecessary upward soil reaction, the design factor theory of weeding blade was suggested based on geometrics and dynamics. For evaluation of design factor theory, the experiment in situ was performed base on ISO 5349:1. The vibration $a_{hv}$ and theoretical value $X_{MF}$ were compared with two groups that one was positive group ($X_{MF}$ > 0) and the other was negative group ($X_{MF}$ < 0). Results: $X_{MF}$ was derived from rotational velocity, forward velocity, disk diameter, weeding depth, blade's width and IA of blade. Two groups had significant difference (p < 0.05). In aspect of the group mean total exposure duration, positive group was 17.53% bigger than negative group. When disk radius 100, 150 and 200 mm, minimum IAs were $4{\sim}27^{\circ}$, $3{\sim}15^{\circ}$ and $2{\sim}10^{\circ}$, respectively. A spread sheet program which calculated XMF was developed by Excel 2013. Conclusions: According to this result, minimum IA of weeding blade for soil reaction reduction could be obtained. For reduction hand-arm vibration and power consumption, minimum IA is needed.

Keywords

References

  1. Asl, J. H and S. Singh. 2009. Optimization and evaluation of rotary tiller blades: Computer solution of mathematical relations. Soil & Tillage Research 106(2009):1-7. https://doi.org/10.1016/j.still.2009.09.011
  2. Benny, J. M and D. C. P. Khoo. 1970. Preliminary Investigations into the Performance of Different Shaped Blades for the Rotary Tillage of Wet Rice Soil. J. agric. Engng Res. 15(1):27-33. https://doi.org/10.1016/0021-8634(70)90107-1
  3. Dytran. 2013. Dytran Iinstruments Incorporated. Available at: www.dytran.com.
  4. ISO. 2001. Mechanical vibration - Measurement and evaluation of human exposure to hand-transmitted vibration. ISO 5349-1:2001(E).
  5. Jeong, H. K and J. K. Jang. 2012. Analysis of consumption of homemade organically processed food. Korean journal of organic agriculture 20(1):1-19 (In Korean, with English abstract).
  6. Kim, C. K., H. K. Jeong and D. H. Moon. 2012. Production actual condition and market outlook of internal and external environmental friendly agricultural product. Agricultural Focus of Korea Rural Economic Institute Vol. 14 (In Korean).
  7. Kim, K. B., E. K. Chung, K. H. You and J. K. Jang. 2012. Assessment on the actual vibration exposure of workers engaging in vibration induced works. Transactions of the KSNVE, 22(10):940-948 (In Korean, with English abstract). https://doi.org/10.5050/KSNVE.2012.22.10.940
  8. Kim, S. S and N. W. Paik. 1996. Assessment of vibration produced by pneumatic hand tools used in automobile assembly. Korean Ind. Hyg. Assoc. J. 6(1):1-16 (In Korean, with English abstract).
  9. KOSHA. 2012. A guideline for measurement and evaluation of part vibration. KOSHA GUIDE: H-77-2012 (In Korean).
  10. MAFRA. 2002. Development of tractor rotary blade for energy saving. Final Research Report. Ministry of Agriculture, Food and Rural Affairs (In Korean).
  11. NI. 2013. National Instruments Corporation. Available at: korea.ni.com.
  12. Noh, K. K and P. Park. 2009. A study on measurement and assessment of local vibration by walking-type cultivator. Journal of Korea Safety Management & Science 11(1):67-73 (In Korean, with English abstract).
  13. Park, H. S and S. M. Huh. 2004. A study on measurement and analysis of local vibration induced by the powered hand tools used in automobile assembly lines. IE Interfaces 17(3):375-383 (In Korean, with English abstract).
  14. Park, Y. J and K. U. Kim. 2002. Analysis and isolation of waling-type cultivator vibration transmitted to operator's hands. Journal of Biosystems Engineering 27(4): 273-283 (In Korean, with English abstract). https://doi.org/10.5307/JBE.2002.27.4.273
  15. Park, Y. J., Y. S. Lee and K. U. Kim. 2004. Vibration reduction of walking-type cultivator's handle using modal analysis and operational defection shapes techniques. Journal of Biosystems Engineering 29(2): 101-108 (In Korean, with English abstract). https://doi.org/10.5307/JBE.2004.29.2.101
  16. R Core Team . 2013. R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. Available at: www.Rproject.org.
  17. Yim, S. H., H. S. Park and J. I. Yang. 2002. A study on the assessment of vibration produced by the powered hand tools used and hand-arm vibration syndrome prevalent in the shipbuilding industry. Journal of the Ergonomics Society of Korea 21(4):25-45 (In Korean, with English abstract).
  18. Yoo, D. K. 2011. A study on strategy development for stabilization of developing new markets for organic products. Journal of Research Institute of Social Science 18(1):5-39 (In Korean, with English abstract).

Cited by

  1. Development of Rotary Cultivator for Poultry Farm vol.17, pp.2, 2018, https://doi.org/10.14775/ksmpe.2018.17.2.060