Technology, energy, agriculture transport AIC

Vitalii YANOVYCH – Doctor of Technical Sciences, Professor of the Department of Agricultural Machinery and Equipment of Vinnytsia National Agrarian University (St. Soniachna, 3, Vinnytsia, Ukraine, 21008, e-mail: yanovichvitaliy@gmail.com, https://orcid.org/0000-0002-8152-7124).

Andrii SHTUTS - Candidate of Technical Sciences, Senior Lecturer, Department of Electric Power Engineering, Electrical Engineering and Electromechanics, Vinnitsa National Agrarian University (3, Soniachna st. , Vinnitsa, 21008, Ukraine, email: shtuts1989@gmail.com, https://orcid.org/0000-0002-4242-2100).

Iryna НUNKO – Candidate of Technical Sciences, Professor of the Department of General Technical Disciplines and Labor Protection of Vinnytsia National Agrarian University (3 Sonyachna St., Vinnytsia, 21008, Ukraine, e-mail: irynagunko@vsau.vin.ua, https://orcid.org/0000-0001-5470-7413).

Ludmila SHVETS – Candidate of Technical Sciences, Associate Professor, Department of Agricultural Engineering and Technical Service Vinnytsia National Agrarian University (3 Sonyachna St.,  Vinnytsia, Ukraine, 21008, e-mail: shlv0505@i.ua, https://orcid.org/0000-0002-4364-0126).

The article investigates the kinematics of forming agricultural machinery products during rolling stamping (RS), focusing on the peculiarities of local deformation of the workpiece material and the possibilities of controlling material flow. Rolling stamping of workpieces is an important non-stationary rotational process used for metal forming under pressure, particularly in the production of complex-profile products for agricultural machinery manufacturing. This process involves rotating rollers that act on the workpiece material in an axial or inclined direction, promoting its local deformation. The localization of the plastic zone allows reducing deformation forces, thereby improving forming processes. The essence of this process lies in the fact that the workpiece material is subjected not only to compression but also to stretching, allowing for the production of high-precision and complex-shaped products.
Controlling the direction of material flow is a crucial aspect of achieving the desired geometric and mechanical properties of products, as this factor determines the accuracy and quality of the finished parts. In agricultural machinery manufacturing, such parts must not only have complex geometry but also possess high-performance characteristics, which is critically important under agricultural production conditions where parts must withstand significant mechanical loads and harsh operating environments.
Using analytical geometry and theoretical mechanics, the kinematics of the RS process with a conical roller was modeled. It was found that the radial flow of the workpiece metal is caused by the action of the radial component of the sliding friction force, which arises due to the different orientations of the velocity vectors of the workpiece and the tool in the contact area. The direction and intensity of material flow are determined by the angle between these vectors. The main parameters influencing the direction of material flow during RS are the tilt angle of the roller axis α, as well as the magnitude and direction of the roller apex displacement δ relative to the workpiece rotation axis.
For a more detailed analysis, simulation modeling of the RS processes using the finite element method (FEM) was applied. A computational model was developed, consisting of a cylindrical tube workpiece, a deforming conical roller, a die, and a mandrel. The distribution of deformation intensity in the flange at various deformation stages was obtained. The modeling results enabled the development of models describing the influence of technological parameters on shape change and the stress-strain state of the workpiece.
The research confirmed the possibility of expanding the technological capabilities of the rolling stamping process by controlling the flow of the workpiece metal. The use of simulation modeling improves the accuracy of predicting the kinematics of product formation, which is important for optimizing production processes in agricultural machinery manufacturing.

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