05.00.00 Technical science
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EFFECT OF PROCESSING TIME OF GLUE IN A MAGNETIC FIELD AND TEMPERATURE ON HARDNESS OF WOOD JOINTS
DescriptionThe article presents the results of experimental studies on the effect of exposure time by a magnetic field and temperature on the properties of adhesive used for wood gluing
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Description
Based on the analysis of the phase composition, the average grain size measured by high resolution electron microscopy and multifractal parameterization structure shows the relationship of coating properties with their structural-phase state. The regularities of the evolution of the structural parameters and multifractal characteristics of the surface layers of materials with shape memory can predict the properties of the composition of the "steel-coating". On the basis of experimental studies, it has been shown that mechanical activation of powders of materials with shape memory effect based on TiNiTa makes it possible to create an effective technology training sprayed material which will generate nano-structured surface layers by high-speed flame spraying. The influence of the mechanical activation of TiNiTa powder on the quality of surface layers formed by high-speed flame spraying was investigated, and a significant improvement in the structure of the surface layer was found, with reduced porosity, high adhesion, and, consequently, increased functionality and mechanical properties. The evolution of the structure at all stages of surface modification based on the fractal approach multifractal parameterization method, which is based on qualitative analysis and instrumental methods in addition to classic microstructure parameters like grain size and specific area related to the physical and mechanical properties, is quantitative information. It was established experimentally that after high-speed flame spraying, the performance characteristics of mechanically activated shape memory TiNiTa powder improved: cyclic durability under high-cycle fatigue increased by about 35.6%, and the wear resistance increased by 3.6 times
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Description
The article contains a block diagram of the mechanical activation process of multicomponent shape memory materials, taking into account the variety of influencing factors. We have proposed to evaluate the reactivity of the sprayed material using the energy criterion (energy intensity), determined by the additivity concept as an energy amount of the raw material and energy accumulated during mechanical activation. Power consumption of the raw material depends on the chemical and phase composition and is determined based on the similarity between the melting energy, plastic deformation and fracture on the thermodynamic characteristics and diagrams of the systems. The energy stored in the MA is determined on the basis of X-ray structural analysis. We have demonstrated that with increasing of grinding precision there is growth in the number of active centers, which enables nanostructurization of surface layers in high-velocity oxygen-fuel spraying (HVOF). According to the study, we have developed practical recommendations for effective implementation of mechanical activation of the shape memory material
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THE DEFORMATION EFFECT OF VM SLIDER MULTI COMPLEX MACHINE SERIES ON PRECISION MACHINING
DescriptionThe article is devoted to the problems of increasing the economic growth of the Russian Federation, the development of high-tech knowledge-intensive manufacturing industries on the basis of a fundamentally new technological order, new unmanned technologies. The measures to improve the accuracy of manufacturing of complex and large-sized parts. Currently, the technical level of many sectors of the economy is largely determined by the level of production of means of production. The basis of these means is the machine tool industry. On the basis of machine tool development we handle a comprehensive mechanization and automation of production processes in industry, construction, agriculture, transport and other industries. We completed a comprehensive analysis of the errors affecting the manufacturing precision parts. The activities for improving the accuracy of manufacture based on VM 32 multi-machine complex series were proposed. We made the analysis of the cutting forces influence and the cross-sectional shape of the slide on its deformation for various types of processing. We determined the optimal shape of the cross section of the slider to increase stiffness and reduce deformation of the slide in metal cutting
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INFLUENCE OF PULP LOGS LENGTH ON THE SIZE DISTRIBUTION OF WOODEN CHIPS MANUFACTURED BY DISK CHIPPER
DescriptionThe pulp logs length influence on geometrics parameters of wooden chips manufactured with a disc chipper with a gravity input is under theoretical discussion in this article
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Description
Based on a mathematical model of the functioning of the universal soil-processing instrument, the problem of optimization of its kinematic parameters was solved. We have also measured the influence of the mechanical properties of soils on the quality of the formed planting spot
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THE INFLUENCE OF RECIPES COMPONENTS IN FORMED PRESERVES ON THEIR REOLOGICAL PROPERTIES
DescriptionThe investigation results in influence of recipes components of different kinds minces on their structurally-mechanical properties are presented
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INFLUENCE OF HILLY TERRAIN SLOPE ON THE VOLUME OF ROAD EARTHWORK
DescriptionThe analytic dependence for slope correction calculation is obtained. This correction is introduced in the formula for calculating the area of earth roadbed cross-section. It allows detailing the volume of road earthwork at the design stage. The correction size depends on the slope steepness as well as cross-sectional parameters of the earth roadbed. The calculations show that the correction size is essential if ratio of slope is 25 or less
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INFLUENCE OF CRYOPROTECTORS ON ACTIVITY OF YEAST CELLS AT FREEZING OF BAKERY HALF-FINISHED PRODUCTS
DescriptionIn the article we consider a possibility of use of pectin on new appointment, as a cryoprotector. In the test with a pectin addition, there is a fermentation process that goes faster and more intensively, it accelerates the process of proofing. At the expense of functional properties of pectin it is possible to provide the ability to live of yeast cells and to provide quality of bread
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INFLUENCE OF RADIANT ENERGY ON THE WORK OF THE ELECTRO-OZONIZER MADE FOR STERILIZING SUBSTRATES
DescriptionThe thermal balance of an electro-ozonizer is presented in this article. As the share of radiant energy having impact on heating of the generator of ozone is defined and the way of decrease in this influence is offered