Analysis of a no-till toolbar for a two wheeled tractor

Fraser, Mark John (2008) Analysis of a no-till toolbar for a two wheeled tractor. [USQ Project]

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Abstract

Currently there is a research project being undertaken by Mr R.J Esdaile of Tamworth, New South Wales, in conjunction with the Australian Centre for International Agricul-
tural Research on the development of a No Tillage Seed Drill for uses in third world countries. This project involves the development of low-cost no tillage seed drills to be made available to farmers in South East Asia.

A prototype seed drill has been designed and manufactured. However there was no rigorous analysis of the structural integrity of the steel frame (toolbar) and tine design.
The aim of this research project is therefore to analyse the current design and to make recommendations that may improve the product as a whole.

In order to determine the forces that the toolbar may encounter, tractive force predictions were calculated, along with a sensitivity study of the impact of extra wheel
weights. It was found that when compared to the fundamental Bekker model, a more reasonable result is obtained by the empirical Gee Clough tractive force prediction
model. The predicted tractive force is approximately 1.5 kN. It was also found that the rake angle of the tine should be reduced from 55 to 30 degrees in order to minimise
the draft force being produced.

Using the predicted tractive force, analysis of key components of the toolbar was also undertaken using the Finite Element software COSMOSWorks. It was found that
the strength of original design is more than adequate for the designed purpose. It is therefore suggested to decrease the current wall thickness of the square hollow section
from 4mm to 3mm.


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Item Type: USQ Project
Item Status: Live Archive
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Supervisors: Chen, Guangnan
Date Deposited: 06 Jun 2014 05:36
Last Modified: 06 Jun 2014 05:36
Uncontrolled Keywords: seed drills; toolbar; tractors
Fields of Research : 09 Engineering > 0999 Other Engineering > 099901 Agricultural Engineering
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070399 Crop and Pasture Production not elsewhere classified
URI: http://eprints.usq.edu.au/id/eprint/25274

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