A dimensional chain has been developed that reflects the interaction of the toothed profiles of the rotors of an orbital hydraulic motor, and the controlled parameters that determine the manufacturing error of these rotors have been substantiated. Therefore, control over the manufacturing accuracy of the rotors of these hydraulic machines is relevant. Like any positive displacement hydraulic machine, an orbital-type hydraulic machine is a rather complex mechanism with parts representing a precision connection. Analysis of the graph of transient processes allows us to conclude that the proposed method fully satisfies conditions.
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The mathematical model was created for calculating the transient start (braking) process in the Matlab mathematical modeling package for optimal control over the swing mechanism. The necessity of joint use of the mechanism for changing the boom outreach as the second control action, which, according to the derived law, changes the radius of rotation of the load suspension point for damping the deflection angle's normal component, has been substantiated. It is shown that the law of change in the dynamic torque of an electric drive obtained using the Pontryagin maximum principle ensures the damping of the load oscillations by the end of the transient process the turning mechanism and to minimize the duration of these processes. The article concerns the optimal control on the swing mechanism regarding speed and simultaneous damping of load oscillations.
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Modern production is impossible without developing and improving lifting and transport mechanisms, which is indispensable for various technological processes. The assumption about the rational area of using this design of the backlash-free transmission for the rotary table at low gear ratios and the use of quadric-thread worms is substantiated. An analytical apparatus for determining the main parameter of the worm gear by the minimum wear criterion is created. The authors conclude that using sliding supports will reduce the time for adjusting machine tools and make the process of manufacturing housing parts more economical. The concept of increasing the resource of a mechanical transmission due to the availability of gapless contact between the worm and the wheel is analyzed. A mathematical model of a two-parameter problem of optimizing the wear rate using Lagrange multipliers is formed. The phenomena associated with a decrease in the intensity of wear and arising in the engagement of a worm gear with limitations on rigidity are investigated. The effectiveness of the proposed method for compensating the gap due to the worm displacement relative to the wheel is substantiated. A design scheme is proposed, and the efforts required to create a guaranteed hard contact are determined. A spatial model of a rotary table with a gap compensation mechanism as sliding supports in the integrated CAD KOMPAS-3D environment has been developed.
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This work is devoted to the research of circular feed devices for a metal-cutting machine with backlash-free worm gear of increased wear resistance. It is also intended to facilitate communication and collaboration between different groups working on similar topics and to offer a bridge between academic and industrial researchers. Gathering the best papers presented at the 3rd Grabchenko’s International Conference on Advanced Manufacturing Processes (InterPartner-2021), held in Odessa, Ukraine, on September 7–10, 2021, this book offers a timely overview and extensive information on trends and technologies in manufacturing, mechanical, and materials engineering, and quality assurance. It also covers cutting-edge heat and mass transfer technologies and energy management methods. It describes tribology and functional analysis of coatings, separation, purification and filtration processes, as well as ecological recirculation and electrohydraulic activation, highlighting the growing role of digital twins, optimization and lifecycle management methods, and quality inspection processes. It focuses on laser, ultrasonic, and combined laser–ultrasonic hardening treatments, and dispersion hardening. It covers a wide range of manufacturing processes, such as grinding, boring, milling, turning, woodworking, coatings, including additive manufacturing.
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This book offers a timely snapshot of innovative research and developments at the interface between manufacturing, materials and mechanical engineering, and quality assurance.