SLOW TO THE GROUND THE TEETH OF THE WORKING UNIT IS ACROSS THE SOIL SOFTENING ZONE STUDY OF THE EFFECT OF SECTION AND ANGLE OF SHOT

Аннотация

One of the most important works in the whole complex of agro- technical measures to prepare the ground for sowing of cotton is harrowing. The article examines the impact of cross-sectional shape and angle of the tooth cusp of a new joint- spike-tooth harrow made of local recycled ferrous metal by casting. Examined the teeth of various cross-sections: square, oval, round. The teeth are wedge-square work surface and different value sharpening angle. The optimal value of the cross- sectional shape and angle of taper of the tooth. Kеywоrds: Cross-sectional surface, gear softening soil link, Deformation, rate of advance. Village household their crops in cultivation to the ground planting before processing to give many work and energy demand to do is an operation . T to the ground processing in giving important from the process considered toothed blizzards of the soil surface to the part processing give and give was of the soil surface part of softens and his/her natural humidity save to stay conditions creation with together , growing emerging stranger the grass loses and lands known to the extent smooths . Proposal being pushed plow local raw from the thing , that is secondary black from metal casting method with is prepared . Such toothed of the snowplow optimal parameters justification for , to take visited scientific and practical research as a result following situation being necessary was theoretical research issues come it turned out a ) K decimal section surface shape; b) Sharpening angle; c) Thickness; g) Tooth tip length, etc. In the article, gear softening soil cross section of the link the issue of justifying the shape of the surface was considered. The tines of the harrow grind the https://scientific-jl.com/wsrj 1 2 4 Volume-40_Issue-2_June-2025 World scientific research journal soil The soil is first compressed in the horizontal direction during the movement of the tooth, and then crushed when the deformation reaches a critical value . The degree of soil softening depends mainly on the deformation rate of the soil and the shape of the transverse cross-section of the tooth [1]. As the deformation rate increases, the stress concentration also increases. As a result, the quality of soil softening increases. We will consider the interaction of teeth with a circular, oval, and wedge-shaped cross-section, mounted vertically on a harrow, with the soil . When a circular tooth moves with a speed V its working surface is hit soil particles AV at the n , station (this on the ground   ,   don't move forward speed direction with 1 1 of the soil to the tooth beaten from the point around passed normal between corner,  -t is a noun steel with friction corner) only tooth way according to forward speed with will be pushed (this at the station   90   ) . V =V (1) a1 n However, this only occurs during the initial period of movement . Because in the AB section, a cone-shaped core is formed from soil particles [2]. Further deformation of the soil occurs through this core. As a result, the tensile resistance of the tooth increases, and the quality of soil loosening deteriorates . Because there, the friction of the soil on the steel is replaced by the friction of the soil with the soil, which leads to excessive energy consumption. Tooth A D and BC at the station tooth with meet soil the angle of friction of the particles on the circle normal moves in a direction that deviates from . This in motion (Figure 1, a) of the soil deformation this on earth  - the angle between the normal and the forward velocity direction 1 transferred to the circle . From formula (2) and Fig. 1, a, it can be seen that the soil deformation velocity in sections AD and BC is proportional to the forward direction of the aggregate movement. to the speed correct proportional being, soil particles contact point tooth from the arrow to move away looking at less is, that is  1 increase with decreases and   90 0 when it is to zero equal will be. 1 Thus, when a circular tooth is used, the deformation rate of the soil is not uniform along the thickness of the tooth , i.e. , it is greater than the maximum value https://scientific-jl.com/wsrj 1 2 5 Volume-40_Issue-2_June-2025 World scientific research journal corresponding to the axis of symmetry (V from speed) decreases to zero. n of the unit). This effect of the tooth on the soil reduces the concentration of stresses, as a result, the quality of soil softening decreases . In addition, the speed of the tooth deformation of the soil is small. or to zero equal was right on the part arrived lumps without crushing to the side pushed will remain. Oval Simon teeth both to the ground effect will be similar to circular teeth (Fig. 1 , b ). Soil deformation speed as follows: class  V  V , (3) this on the ground -t work exacerbation corner half. a n cos  (Fig. 1, c) and expression (3) show that the soil deformation rate is the same on all working surfaces of the conical tooth and deforms the soi