Abstract
This article notes that most of the soil-cutting working bodies wear out their socks a lot, as a result of which their limiting state is reached. Despite the fact that other parts of the working body are still workable and the stock of metal for wear is still sufficient, the working body is completely rejected. In this regard, it is emphasized that increasing the durability of the nose parts leads to an increase in the durability of the entire working body. To determine its parameters, the condition for leveling the resources of socks and other parts of the soil-cutting working bodies is considered. When determining the length of the nose of the bits, an analytical dependence is recommended, taking into account the geometric parameters of the bit and the plowshares welded to it. To obtain self-sharpening in the process of bit nose wear, it is recommended to use a new two-faceted profile. The rational values of the length, the angle of the wedge and the sharpening of the nose are determined, equal to 90 mm, 100 and 350-400, respectively. Based on the condition of rational combinations of strength and self-sharpening characteristics of the toes of bits, the thickness and width of the latter were determined, equal to 22.3 mm and 30 mm, respectively.
Highlights
For deep soil cultivation, a significant increase in durability is achieved through the use of chisels that facilitate the wear conditions of the working bodies
Based on the studies carried out, it can be noted that to ensure the equal resource of the bit nose and the plow blade, the wedge angle and the length of the bit nose, respectively, should be at least 10o and 9o mm
Sufficient strength of the toes of chisels during deep tillage is ensured with their thickness and width, respectively, not less than 22.3 and 30 mm
Summary
A significant decrease in tractive effort during soil cultivation is possible due to preliminary loosening of the soil in front of the main working body, [1,2,3,4] that is, creating an opportunity for the main working body to perform unlocked cutting [5, 6], creating a decompacted zone as well as preliminary loosening of the soil by the working body in front or its nose part, reduces its wear capacity as a result of reducing the contact load of the parts. The nose parts of the working bodies to one degree or another facilitate the conditions of their work, that is, they loosen the soil and thereby reduce the wear of the adjacent parts of the parts [7]. In this regard, it can be noted that by increasing the durability of the nose parts, the durability of the entire working body can be increased. The nose parts of the working bodies make changes in the wearing capacity of the soil, thereby creating conditions for better and longer performance of the parts of their service functions [8]. The work of the plow with plowshares, whose socks are worn out, is unacceptable, since it does not penetrate well, plows unevenly in depth, its resistance increases, and, fuel consumption per hectare of plowing increases and productivity decreases [10]
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