The subject of the research is the optimization of the mechanism of the cross planer. In the article, on the basis of the condition of closed contours, the equations of the projection of the links on the corresponding coordinate axes are compiled. A functional relationship has been established between the kinematic parameters characterizing the movement of the input and output links of the mechanism. The obtained numerical calculations are presented in the form of graphic dependences. The aim of the work is the optimal metric synthesis of the mechanism of a cross-planer, with parametric restrictions. The conclusions obtained in the article can be used to improve and design modern technological equipment with mechanisms similar to the mechanism of a cross-cutting machine.
Different compositions of mixtures of sand and clay with medium-grade bentonite for molding of critical large parts of a freight car bogie are examined in the article. Different compositions to improve bentonite’s physical and mechanical properties, such as gas permeability and compressive strength with the addition of soda ash, are considered. As a material for the study of sand and clay mixtures were taken quartz sand grade 1K2O2025, medium strength bentonite Navbaharskogo birthplace, and for improving the physical and mechanical properties of bentonite - soda ash. One possible way to increase bentonite's stability at high temperatures is to treat it with sodium-containing powder like soda ash. The treatment is performed by adding soda ash in powder form to dried bentonite. Experimental results are given in the form of tables and diagrams. Experimental studies were carried out in the production conditions of the central plant laboratories at ES “Liteyno-mechanical plant”. The experiments were carried out following the normative documents. The basis of the results was plotted, and the assumed composition of sand and clay mixtures was established.
There are no optimal vibration damping designs for safe movement at the present stage of the development of high-speed rail transport. The purpose of improving existing structures is their ability to simultaneously dampen both longitudinal and transverse vibrations. For dynamic research, an analytical method has been developed for calculating the stresses and deformations of the sidewall of the frame of an electric locomotive bogie in motion, taking into account the unevenness of the joints. The result of the work on creating a new design of a two-axle bogie of a railway vehicle, with additional damping elements of the vibration damping system, is the Patent of the Republic of Uzbekistan for the invention No. IAP 06498 [1]. The considered design is universal and suitable for a subway car, motor locomotive, or railcar.
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