simulation

Computer simulation of dynamic processes in power skiving gear cutting

The paper presents the results of simulation of the dynamic processes during gear cutting using the power skiving method.  Oscillations in the elastic system of the machine tool have been studied using the Simulink Matlab system.  The closed dynamic system is represented as a series-coupled connection of the elastic system of the cutting process and the elastic system of the machine tool, which is assumed to be two-mass, with masses applied to the table assembly with the workpiece and to the tool spindle.  The input signals of the cutting process system – the thickness

DYNAMIC BEHAVIOR AND ENERGY DISTRIBUTION IN A CRANK-EXCITED THREE-MASS VIBRATORY SEPARATOR

This study presents the development and dynamic analysis of a mechanical model representing a multi-component vibratory system consisting of a feeder, a vibratory transporter, and a conveyor-separator. The main goal is to simulate the oscillatory response of a three-mass separator excited by a crank-slider mechanism and analyse its efficiency, focusing on the working body responsible for material separation. The vibratory system is modeled using a set of second-order linear differential equations derived via Lagrange’s second kind formulation.

INFLUENCE OF AXIAL TOOL FEED ON UNDEFORMED CHIP GEOMETRIES IN POWER SKIVING GEAR CUTTING

The purpose of this article was to formulate recommendations for developing strategies for multi-tool cutting of gear wheels that ensure a productive and reliable process for ensuring the accuracy and quality of machined surfaces.  The determination of the effective axial feed rate to achieve maximum productivity has not yet been fully explored. The objective of this article is to ascertain and examine the impact of axial feed on the chip formation process during the cutting of the gear rim.

MODELING AND PROTOTYPING OF AN ACOUSTOFLUIDIC SYSTEM FOR MICROPARTICLE SEPARATION

This article presents the results of numerical modeling and experimental prototyping of an acoustofluidic microchannel structure for the separation of microparticles suspended in a liquid medium. A two-dimensional model was developed to analyze the influence of geometric and physical parameters on the formation of the acoustic field within the microchannel and the efficiency of particle separation.

METHOD FOR RECONSTRUCTING 3D MODELS FROM IMAGES: A CASE STUDY USING THE SHAHED 136 DRONE

Method for reconstructing 3D models from images: a case study using the Shahed 136 drone. A study of the dimensional and proportional characteristics of the model is carried out. The main stages of model construction are considered. A block diagram of the image perspective transformation program is presented. The activity diagram given in the paper visualizes the steps required to perform an image transformation, including point selection, calculation, and generation of the final image.

DEVELOPMENT OF A PROGRAM FOR MODELING AND SIMULATING A COLLABORATIVE ROBOT WORKSPACE

The article presents the software development for modeling and simulating the workspace of a collaborative robot taking into account the presence of people. This is an important step in creating safe and efficient robotic systems within Industry 5.0 concept. The problem is posed by the need to ensure safety during the interaction of the robot with the operator, which is relevant for modern production processes with high human participation.

DETERMINATION OF GEOMETRIC PARAMETERS OF UNDEFORMED CHIPS AT THE STAGE OF CUT IN DURING MULTI-PASS CUTTING OF THE INTERNAL GEAR BY POWER SKIVING

The article presents the results of modeling and studying the processes of cutting internal gears by the power skiving method based on the previously developed graph-analytical model of cut layers. The results of the calculations of the geometrical parameters of undeformed chips can be used to calculate the forces that occur in the process of four-pass gear cutting and influence the parameters of this process.

INCREASE PRODUCTIVITY OF HARD-TO-MACHINE MATERIALS BY PREVENTIVE HEATING OF THE WORKPIECE

The possibility of increasing productivity by increasing the cutting parameters of difficult-to-machine materials, using expensive tool materials, etc. is an extensive trend of innovative improvement and is accompanied by high costs of operations and the need to provide expensive equipment. The article argues that a more effective method of improving machining operations is the use of the workpiece Turning with Preventive Heating (TPH) method.

STUDY OF THE CUTTING FORCE BASED ON THE OBTAINED UNDEFORMED CHIPS DURING CUT IN WHEN MACHINING AN INTERNAL GEAR BY POWER SKIVING METHOD

This article explores the formation of non-deformed chips during the cut-in of an internal toothed ring using the Power Skiving method. This pivotal stage of the cutting process poses significant hazards not only in gear cutting but also in any cutting operation. The study involved modeling the process at the initial stage for various technological parameters, including cut-in depth and number of working passes. To achieve non-deformed chips, a methodology developed for worm milling was applied.

ASSESSMENT OF RADIATION HAZARD OF CONCRETE AND BACKGROUND RADIATION INDOORS

Simulation of the dose rate of building materials γ-radiation in the premises of different designs has revealed the minimal levels of human exposure. It was determined that the exposure dose rate at the given points of a single room depends on the content of natural radionuclides in construction materials and the changing geometry of a person's exposure in the premises. When the exposure dose rate of γ-radiation above an individual plate is determined, it is conventionally divided into the discrete sources, the dose rate from several plates is summed up.