Papers by Keyword: Equipment

Abstract: As with any measuring device, it is important to install and operate water meters that are calibrated within an acceptable international standard (ISO) and regulatory acceptable relative error, in accordance with the requirements of the international standard. The article deals with the issue of correct installation of measuring devices during operation and checking on high-precision equipment. Production In order to increase the technical level and meet people's needs, there is a need to use the latest modern measuring tools of equipment and technology in the economy and production. For this reason, it is important to provide citizens with new measuring devices and provide them with regular technical service in our country. It is necessary to create modern equipment and laboratories for checking measuring instruments. As the devices are used, their life ends after a certain period of time, and they need to be checked. A malfunctioning device leads to incorrect information, incorrect calculations and losses, depending on where it is used for its intended purpose. By checking the measuring devices in modern laboratories with high accuracy, removing the defect and re-using it after calibration, we get correct calculations, correct information exchange, and elimination of losses. For example, the correct installation of water measuring devices was also checked on the error determination stand, and the results of their errors at different values ​​were automatically displayed in the error curve table.

Abstract: This paper examines and analyzes the domestic and foreign regulatory framework, guidelines and technical documents, information brochures, manuals, handbooks, test reports and other literary sources as well as information on the Internet. In the countries of the European space, fire safety requirements have been established for roofs and roofing materials, both for roofing materials and for roofs as part of structures, which helps to limit the spread of fire in buildings and structures during a fire. It has been proven that there is a need to create equipment for testing resistance to external fire exposure in accordance with DSTU CEN/TS 1187:2016 (method 2) of coverings of buildings (roofs) and establishing fire classification according to DSTU EN 13501-5:2016. A registration certificate, a technical description, an operating manual, and a program and methodology of the test bench verification have been developed. The initial verification of the test bench was carried out and it was put into operation. Approbation of the test method was carried out on the created test bench through experimental studies of five types of roofing materials being widely used on construction works in Ukraine using two bases (substrates) of combustible and non-combustible materials at air flow speeds of 2 m/s and 4 m/s above the specimen surface. According to the results of this work, it was established that the maximum relative deviation of the result of measuring the length of the damaged (charred) part of the specimens was in the range of 1.2 % to 23.3 % for the roof and 0.7 % to 27.5 % for the base.

Abstract: This study is to explore the changes in the performance of sports equipment under the action of carbon fiber reinforced epoxy composites. This paper studies the effects of carbon fiber reinforced epoxy composites in pole vault, bicycle, and tennis. The research results show that the performance of sports equipment based on carbon fiber reinforced epoxy composite materials has been greatly improved, with outstanding effects in terms of thermal properties, interface properties, mechanical properties, and fatigue resistance. Carbon fiber reinforced epoxy composite material damage expansion is divided into five stages: matrix cracking, interfacial degumming, delamination, fiber fracture, fracture. Therefore, carbon fiber reinforced epoxy composite materials are comprehensive for the improvement of sports equipment, which has greatly promoted the further development of sports. Carbon fiber reinforced epoxy composite materials can be promoted in other fields, thereby obtaining greater progress with help of high technology. The study of carbon fiber reinforced epoxy composites in this paper has a positive effect on subsequent research.

Abstract: The paper presents the results of experimental development of the technology of friction stir welding to obtain a nonseparable connection of a special aerospace aluminum, titanium and magnesium alloys, high-temperature steels. Regularities and models of heat balance in the welding zone have been determined, which make it possible to predict the technological possibilities of high-speed friction welding. It is established that high-speed friction welding by mixing allows to obtain a high-quality connection at lower loads on the design of the equipment. On the basis of studies of macro-and microstructure, microhardness, level of residual stresses and strength tests, technological recommendations on the choice of welding conditions and conditions were obtained. Presented of experimental and industrial development of special equipment, high-speed friction welding, design and manufacturing of high hardness tools of complex spatial shapes for welding aircraft materials.

Abstract: The results of the process experimental studies of titanium alloys transverse rolling bars are presented. The efficiency of using such a process for reducing the surface roughness is shown. The samples were tested after rolling on corrosion-resistance resistance, ultrasonic testing, and also the study of the metal microstructure was made. For the bars transverse rolling in industrial conditions, a tooling was developed and created, intended for installation on operating centerless lathes instead of tooling with a cutting tool. Production tests of new equipment has shown its good performance.

Abstract: The article analyses corrosive stock in an oil and gas field, and the protection method for the equipment in boreholes and in oil pipelines is discussed. Subsurface pumping equipment corrosion rate monitoring method has been improved. In an oil and gas field, the inhibitor is pumped into the oil pipeline directly into the oil-gathering line and into the production boreholes with different dosages. Pilot testing was carried out to optimize the corrosion inhibitor dosage.

Abstract: Heat-resistant alloys are the basic material of gas turbine engine (GTE) design. Fine-grained structure in these alloys can be formed by isothermal forging and then different axisymmetric GTE components as wheels, shafts, rings can be superplastic roll formed. Examples of the superplastic and isothermal deformation use for manufacturing components out of superalloys and steels for critical applications are given. The possibility of roll forming parts as rings with a diameter up to 800 mm and as flange - cone with a diameter up to 600 mm out of superalloys (Inconel 718, EK79, EP741NP), accordingly, on SRZHD-800 and modified PNC-600 mills were showed. The macrostructure investigations of the components after the roll forming showed that the homogeneous structure was formed. The microstructure at the flange portion was fine-grained and at membrane zone was coarse-grained. Cone part was roll formed at isothermal condition from pre-stamped chromium martensitic steel sheet. Manufacturing technology of roll forming was tested by computer and physical simulation. Service properties of components were obtained by subsequent heat treatment. The effectiveness of the technology associated with increased service properties of components and decreases the labor content by automated equipment.

Abstract: Getting a new generation of materials, advancing by its qualities world counterparts, among the most important objectives of the creation of scientific and technical groundwork in various fields of science and technology. Particular attention is paid to technological metals and their alloys; materials having the fine and ultrafine structure, single crystal, amorphous and powder materials. The preparation of such materials is possible thanks to new production technologies, modern equipment and the use of costly additives or use of technologies with application of complex measures for these materials. One way to obtain the desired technological properties is the use of complex natural materials. This method is cheaper compared to other costs, and requires no additional equipment, as well as lower costs of preparatory. For more efficient use of these components is necessary to preliminary processing, which will improve the effect of the use of steel in the modification. The type of treatment can be varied by mechanical activation powder to extract individual components. As a result of a series of studies on the impact modifiers to change the structure and properties of steel were detected changes in the structure; in particular the number of non-metallic inclusions was reduced.Heat treatment allows improving effect of modifying the structure of steel and the items received.

Abstract: Upon the attainment of independence many African countries emerged with a new spirit of entrepreneurial governance and domestic industrialization. However with time, most of the state owned enterprises (SOEs) set up have been privatized largely because of mismanagement, huge deficits and operational inefficiencies created by many factors. In all material moments, the objective of divesture of SOEs was to stimulate efficiency, productivity and relieve the state of the huge financial burden they bring. Our study examines the methods of privatization of healthcare technology and equipment SOEs in Africa and their impact on post-divestiture productivity based on cases from Ghana, Nigeria, Tanzania and Kenya.We simultaneously collect and model privatization data from International Monetary Fund (IMF) and the World Bank relating to Ghana, Nigeria, Tanzania and Kenya. These were data submitted to the IMF and World Bank as part of the measures to implement the different forms of economic recovery and structural adjustment programs in the respective countries. Our empirical strategy follows the broader literature in estimating reduced form equations for firm performance as a function of ownership, while trying to account for potential problems of heterogeneity (observed and unobserved) and simultaneity bias. We note the insider/employee shareholding accounted for only 23.6 percent of privatization of healthcare equipments and technology manufacturing enterprises on average while mass privatization program accounts for 18.2 percent of the privatization mode. We note that each of these methods yield positive post divestiture labour productivity. However privatization of healthcare equipment and technology manufacturing enterprises by block sale to outside investors generated the highest form of labour productivity.

Abstract: The current cutting equipment and methods cannot meet the demand of offshore wind cut jacket. In order to solve this problem, we develop a new suit of offshore wind jacket intersecting line cutting equipment. In this paper, detailed structure and operating guide of the equipment have been presented. The characteristics and application range are also included. The new equipment is simple and practical.