Study on wear characteristics of cultivator reversible shovels and its FEM analysis
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Date
2020-11
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
Cultivator is one of the most used agricultural implement by Indian farmers, they faces problem of wear in its working parts. The reversible shovels are mostly used cultivator shares and they are manufactured by local manufacturers without any standard in dimensions and material as well, that affects the operational life of the shovel. To know the wear characteristics of the commercially available reversible shovels, three different make shovels were selected and a study was conducted in the fields of HRC, Pantnagar by mounting them on a nine tyne spring cultivator. The study was carried out for 100 h and the wear was analyzed both gravimetric and dimensional for each time intervals of 10, 20, 40, 60, 80 and 100 h of operation. The study reveals that the shovel S3 shows low gravimetric wear followed by S1 and high for S2. The dimensional wear was high for S3 followed by S1 and low for S2 because S2 was thicker than other two shovels. In India, there are only few registered cultivator manufacturers and most of the cultivators are manufactured by local artisans which encounter problems of failure under different load conditions. The stress analysis of locally manufactured cultivator tyne was analyzed by FEM (static simulation) using SolidWorks 2016 parametric design software. The analysis shows that the locally manufactured tynes had minimum factor of safety of 18. In general, machine design was carried out with minimum factor of safety as 2, so the dimensions of the tyne should be reduced in order to save the material and energy related to it that helps in cost reduction of cultivator. The maximum displacement (deflection) was observed at tip of the shovel, this indicates that the tip of shovel is subjected for wear first and same was revealed from field studies.