Global Journal of Science Frontier Research, D: Agriculture and Veterinary, Volume 23 Issue 4

Evaluation of the Effectiveness of using the Plowshare K K Nuriev, M K Nuriev α & M A Bakhronova σ Annotation- The article analyzes the "life" cycle of the plowshare and shows an effective solution to increase the resource. The analysis of complex factors affecting the wear of the ploughshare emphasizes their main ones. The working condition of the ploughshare is evaluated and the essence of the influencing forces on its wear is revealed. A mathematical model for determining the ploughshare resource is derived. Having solved the model using the example of a plowshare for different values of their components, it is determined that the resource of the plowshare decreases with increasing width and angle of the occipital chamfer, and at the same time, with increasing width, especially in hard soils, the resource decrease is observed at a more intensive rate. It is established that an increase in the width of the rear chamfer by 1 mm and the angle by 10 reduces the life of the plowshare by 33% and 12%, respectively, and an increase in the plowing depth by 1 cm reduces the life of the plowshare by 16%. It is proved that the reason for the plow surfacing due to an increase in the soil reaction is an increase in the parameters of the rear chamfer. A method of reducing the magnitude of the soil reaction is recommended. I. I ntroduction s is obvious, the work of the plow is evaluated by its plowshare. Since when the plowshare is worn out and the agrotechnical indicators for the depth of plowing are not provided, the work of the plow stops. When the plowshare is restored or replaced with a new one, only then is the plow allowed to continue working. Therefore, when the plowshare is inoperable, the plow is also considered inoperable. From this it can be concluded that the operational and technological indicators of the plow are determined by the ploughshare, which are considered its working body. II. T he S tate of the I ssue U nder S tudy In order for the plow to consistently fulfill the agrotechnical requirement (ATT) for plowing, its plowshare must be constantly sharp – self-sharpening. (A ploughshare is considered sharp when the thickness of the edge of its blade does not exceed 1 mm, the chamfer parameter formed from the rear side should have a minimum permissible value for these operating conditions, the angle of sharpening should not exceed 1.5-2 times the initial values). The main issue here is to ensure that the sharpness of the blade is preserved for the longest time, i.e. the maximum resource of the ploughshare, since the productivity of the ploughshare unit is directly proportional to the resource of the ploughshare. Therefore, ensuring its high resource is considered very important. III. M ethods and R esults of the S tudy To develop a way to increase the resource of a plowshare used in production, consider the period of its “life” cycle. As you know, the work of the plow can be stopped mainly according to three criteria: • Technical (arrival of the ploughshare parameters to the limit values); • Technological (non-ploughshare ploughshare ATT); • Economic (sharp increase of zartat when using a plow). Of these three criteria evaluating the quality of the work of the ploughshare from an agro-technological point of view (in terms of the quality of work), we choose the second one. For this criterion, the main indicator is to ensure the depth of plowing. If by this indicator, having studied the work of a serial plowshare, we determine its resource by taking the change in the depth of plowing according to ATT equal to σ = ± 2 cm and taking into account the results of long-term research by scientists and expressing the change in the resource of serial and proposed plowshares with a curved graph, they can be studied and evaluated together (Figure 1). As is known, always in the initial period of time, both variants of the Т 1 and Т 1 1 ploughshares have working surfaces in which intensive wear occurs. Then comes the second period where the wear process of the serial plowshare slows down and normal operation begins with a stable wear intensity during time Т 2 , until the thickness of the cutting edge exceeds the maximum permissible value of The period Т 3 characterizes the work with a blunted blade. Thus, the time period Т 2 can be considered as the main stage of the plowshare life cycle, after which it is necessary to replace it. A Author α : Gulistan State University, Republic of Uzbekistan, 4th microdistrict, Gulistan, Syrdarya region, 120100, Republic of Uzbekistan. e-mail: karimnuriyev0@gmail.com Author σ : Tashkent Institute of Irrigation and Agricultural Mechanization Engineers National Research University, Tashkent, Uzbekistan. e-mail: makhliyo_0787@yahoo.com Global Journal of Science Frontier Research ( D ) XXIII Issue IV Version I Year 2023 5 © 2023 Global Journals α пр .