Methodological aspects of determination of resultant force acting on the cultivator spring tines

Krzysztof Lejman, Zygmunt Owsiak, Krzysztof Pieczarka, Franciszek Molendowski

Abstract


This paper presents aprocedure for determination of the tilt angle of the resultant force and the point of its application on the cultivatorspring tine. These parameters include the temporary value of horizontal and vertical force, moment of force and cutting depth. Numerical methods were applied to determine the point of application of the resultant force as an intersection point of the resultant force direction and the circuit described on the cultivator point curvature. Calculation algorithms include changes in the position and geometry of the cutting system caused by a dynamical load of a tool. Tests were carried out in field conditions in the sandy clay of 11.2% density moisture. Two depths of cutting with four tines, which differ with flexibility coefficients, were applied. It was stated that the setting parameters of the resultant, calculated with the use of the presented method, have low-value standard deviations. It was also found out that the tine flexibility and cutting depth positively influence the tilt angle of the resultant and the tine flexibility affects only the distance of the point of the resultant force application on a tool from the bottom of a furrow.

Keywords


soil; spring tine of a cultivator; resultant force

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ISSN: 2083-1587 (print)
ISSN: 2449-5999 (online)

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