Abstract. As the title implies the article describes how to optimize the construction of a combined cutting tool on the example of developed design of the face milling cutter with regulable rigidity of damping elements in order to improve the vibration resistance of the cutting process. RecurDyn is proposed, which is widely used for creating models of different mechanical systems, their analysis and optimization of construction, uses the ideology of visual object-oriented programming and computer research of volume solid-state models. Much attention is given to the description of the mechanical and mathematical model of the face milling cutter in RecurDyn and the results of mathematical modeling of the face milling cutter with damping elements, consisting of individual elements, with the possibility of program controlling its operation in the process of cutting. The applying of RecurDyn made it possible to carry out a complex assessment of influence of separate elements of a design of the combined cutting tool on quantitative and qualitative parameters of milling process and to define optimal values of the input and output parameters of technological process of machining for various damping elements. The modeling of mechanical systems in RecyrDunOne of the most important stages in the design of cutting tools is the development of their mathematical models and subsequent modeling for a preliminary assessment of the quality of functioning, in order to determine the degree of influence of the produced structural or technological changes on the qualitative and quantitative parameters of the cutting process.In RecyrDun the ideology of visual object-oriented programming is used. This software is designed to create models of various mechanical systems, their analysis and optimization.The core module of the RecyrDunProfessional consists of Body, Joint, Force and Contact.Body makes it possible to include solid bodies of correct geometric shape in the structure (ellipsoid, cylinder, parallelepiped, torus, cone). Mass geometric characteristics are determined by body sizes and material densities, which are set by the user. Joint contains a set of connections providing various movements of the connected system bodies relatively each other. Force allows to describe the various forces acting on the bodies of a mechanical system (the elastic force of Spring with a given rigidity and damping, the force of Axial, acting in the given direction and described by the analytical expression, and many others). The great advantage of RecyrDun in comparison with the most known programs for modeling multibody mechanical systems is the possibility of describing contacts between the bodies of the system without an analytical description of this interaction. Contact gives us this possibility.The interface of contact interaction allows setting the direction of force interaction, stiffness, and damping. Another advantage of RecyrDun is the possibility to include the deforming finite element bodies in the structure of solid bodies system, to mak...
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