Introduction. One of the main components in the diet of farm animals is concentrated feed, which in Russia is grinded by shredders. At the same time, in the final product, there is a high dust content, which can be reduced by using grinders with a different principle of grinding. The design of a milling shredder, in which grains are crushed by cutting, is proposed. Aim of the Article. The article presents theoretical studies of the influence of design and technological parameters of a milling shredder on the conditions of grain motion along the tooth of the working body. Materials and Methods. The theoretical study of the developed shredder was carried out using averaged acceleration methods. The tooth surface of the working organ was studied. Results. As a result of theoretical studies, equations describing the motion of a particle along the working body tooth surface were obtained. There has been developed a program to facilitate the process of analyzing the influence of the structural and technological parameters of the shredder on the process of particle motion along the tooth surface. Discussion and Conclusion. There is a directly proportional decrease in the time of motion of the particle along the working body tooth surface with increasing the angular velocity. At the same time, increasing the angle leads to the increase of the time of the particle along the tooth surface. The increase of angular velocity values leads to decreasing particle displacement along the axis. At the angle of 45° displacement along the axis is 1.1‒1.5 times less than at an angle of 70°. At high angular velocities, the moving along the axis is minimal. The analysis, given the need to create a smoother motion of the particle along the helical line, shows that the most rational will be the following values: angle 70° and angular velocity of the working body 185‒206 rad/s.

The relevance of the chosen topic is formulated in the article, a milling grain shredder is proposed. calculations of the productivity of the milling grain shredder are given. Theoretical studies have determined the grain supply through the chopper loading window during the movement of the milling cutter tooth in the loading window area. Grain feed along the milling cutter axis is calculated. It was found out that the main limiting parameter in terms of productivity is the grain supply along the axis of the milling cutter. For the developed shredder, the theoretical productivity is calculated, which varies from 90 to 100 kg/h with an increase in the angular velocity of the cutter from 185 rad/s to 206 rad/s

Shredding is one of the most energy-consuming operations in the feed preparation process. Among the methods of shredder materials, precise cutting is a less energy-consuming process and provides a higher quality of the ready product. The efficiency of grain shredders is usually evaluated as a combination of qualitative and quantitative indicators. When improving the shredding process, it is necessary to ensure that the finished product meets the zoo technical requirements, and the shredder provides high productivity with minimal energy consumption. Quantitative indicators include the productivity of the shredder and specific energy consumption. In practice, it is necessary to separate the energy consumption of the shredding process and the energy consumption of the process, taking into account the degree of shredding. The design of a shredder capable of providing oblique cutting with greater efficiency is proposed. The shredder has a truncated rod that is located on a shaft inside a cylinder with longitudinal holes. In the longitudinal holes of the cylinder there are removable counter-cutting knives. The productivity of the given rod shredder generally depends on the mass of crushed particles passing through the hole per rotation of the rod; the frequency of rotation of the rod and the number of holes. As a result, an analytical formula is expressed that allows calculating the productivity of the rod shredder based on these parameters. The results obtained can be used in the design of shredding machines and will be used in the future when creating an experimental installation of a shredder.