Comparison of different blade shapes of translatory moving soil tillage tools

Abstract

BACKGROUND: The efficiency and energy capacity of translatory moving soil tillage tools are largely determined by the parameters of their blades. If the parameters do not match the specified operating conditions, clogging the working tools with plant residues becomes possible, and a less energy-consuming type of soil cutting — sliding — may be replaced with a more energy-consuming type — chopping cutting. In this regard, it is very important for scientists engaged in improving the designs of translatory moving soil tillage tools to have a method for assessing the shape of the blades.
 AIMS: Development of a method for comparative assessment of various blade shapes of translatory moving soil tillage tools.
 METHODS: For this study, the fundamentals of agricultural mechanics, higher mathematics, and theoretical mechanics were used. The objects of the study were the blades of various soil tillage tools, providing with sliding cutting of soil. The study was conducted at the Gorsky State Agrarian University in the period from 2022 to 2023. The calculations results were compared with the materials of the corresponding standards.
 RESULTS: The method that helps to determine the relative values and directions of the resultant force of soil cutting resistance with a translatory moving blade of a soil tillage tool having a diverse shape has been developed. An example of the application of the method for assessment the effectiveness of blades of a garden tool, the cutting part of which is described by the equation of a straight line, a circle, an Archimedes spiral, a logarithmic spiral, as well as an example of assessment of a curved blade for soil tillage tools of cultivators are given.
 CONCLUSIONS: The proposed method for assessing the influence of the shape of a translatory moving flat blade of the soil tillage tools on the value of soil cutting resistance forces is easy to use and can be the basis for further development in order to analyze the effectiveness of the knives’ blade shape performing a plane-parallel movement.