INFLUENCE OF CHANGE PARAMETERS OF TECHNOLOGICAL PROCESS ON COEFFICIENT OF DYNAMISM OF THE EQUIPMENT

The influence of changing the technological modes of rolling on the dynamic load of the coilers of rolling mills has been established. The functional equation of motion for strip winding has been determined, the solution of which makes it possible to establish the dependence of the elastic force moment on the strip winding time. The moment of elastic forces is used when calculating the dynamic factor, which characterizes the dynamic loads on the nodes of technological equipment. Investigated the change in the coefficient of dynamism at different thicknesses of the wound strip.

ENERGY EFFICIENT WATER-COOLED ELEMENTS FOR FOUNDRY CLASS ELECTRIC ARC STEELMAKING FURNACES

Possibility of a wide choice of original charge and variation of oxidation potential in melting process makes the electric arc furnace (EAF) a general-purpose unit in foundries. Energy-intensive classical technology with insufficient specific power of the transformer, irregular operation with forced downtime predetermine a low energy efficiency of foundry class furnaces [1,2]. Flat and shallow bath of the EAF enhances the problem.

OF PLASTIC PROPERTIES OF AISI 316L STEEL BY METHOD OF REGISTRATION OF MACROLOCALIZATION FIELDS

Selective laser melting is one of the modern methods of manufacturing parts in the production of machine-building equipment, a special place is occupied by complex technological processes used in the manufacture of high-load units of pneumatic-hydraulic system from heat-resistant alloys. The studies were performed on samples made of powder material AISI 316L stainless steel martensite class. Tests to determine the mechanical properties were performed in accordance with ISO 6892 on an INSTRON test machine. The control of the surface roughness was performed using a BioBase device. From microstructural analysis and testing the method of registration of macrolocalization fields of the working zone samples, it was found that the destruction began from the surface of the samples from the microconcentrators due to different roughness.

ASSESSMENT OF THE INFORMATION OF MATHEMATICAL EXPECTATIONS OF EXPERIMENTAL SAMPLES OF MEASUREMENTS WITH UNKNOWN STATISTICAL REGULARITIES

Technologies for recognizing samples of experimental measurements with the use of empirical decision rules based on probability distribution functions have been developed and studied. Based on the results of computational experiments, conclusions are made about the effectiveness of the proposed decision rules when applying them to short samples of experimental measurements.

INVESTIGATION OF HOT PLASTIC DEFORMATION OF LABORATORY AXIAL FLOATS

A review of research in the field of modeling experiments on heat treatment and pressure treatment of metal and the impact on the physical and mechanical properties of steel with a chemical composition of 0.59% C, 0.31% Si, 0.73% Mn. A mathematical model for calculating the physical and mechanical properties of steel in the process of hot plastic deformation has been developed and prospects for further development of research in this area have been identified. As a result of modeling, the following functions were obtained: the amount of deformation in the direction of the applied force divided by the initial length of the material. The coefficient of elongation of the material with the actual chemical composition at a temperature of 1250 ± 10 ° C, which was 0.32. When comparing the values of the load that was applied to the GPA in the laboratory and the results of calculations using the developed model, it was found that they have close values of about 45 MPa. This confirms the adequacy of the obtained model.A review of research in the field of modeling experiments on heat treatment and pressure treatment of metal and the impact on the physical and mechanical properties of steel with a chemical composition of 0.59% C, 0.31% Si, 0.73% Mn. A mathematical model for calculating the physical and mechanical properties of steel in the process of hot plastic deformation has been developed and prospects for further development of research in this area have been identified. As a result of modeling, the following functions were obtained: the amount of deformation in the direction of the applied force divided by the initial length of the material. The coefficient of elongation of the material with the actual chemical composition at a temperature of 1250 ± 10 ° C, which was 0.32. When comparing the values of the load that was applied to the GPA in the laboratory and the results of calculations using the developed model, it was found that they have close values of about 45 MPa. This confirms the adequacy of the obtained model.

MATHEMATICAL MODEL OF RAILWAY DYNAMICS AUTONOMOUS TRACTION MODULE

In the report the author offers a mathematical description of the model of the dynamics of the railway autonomous traction module. The autonomous traction module is a multi-mass complex system moving on a railway track. The mathematical model takes into account the parameters and types of connections between the solids of the system, as well as takes into account the sliding forces between the wheels and rails. The mathematical model developed by the author can be applied at theoretical researches of innovative designs of autonomous traction means on railway transport.

OPERATION MANAGEMENT IN A NET-TYPE INFORMATION SYSTEM: CONCEPT INTEGRATION

The analysis of perspective directions of creation of space information systems of network-type (satellite systems which realize information transfer on the basis of the Internet technologies, and also processing and storage of the information in space) is presented. A generalized approach to the management of many tasks that implement nodes of the information system of the network type (with emphasis on a special case of application of this scheme for the space information system) is proposed. In the general scheme of task management there are two main components (task management in the network node and control of the distribution of tasks between network nodes), as well as the basic principles of their implementation. The analysis of some separate cases of realization of the named principles of management of tasks in a networks of satellite systems is carried out.

SIMULATION AND OPTIMIZATION OF INTERACTION PROCESS PARAMETERS THREE ENTERPRISES IN A SINGLE PRODUCTION SYSTEM

The article presents a method of designing the process of interaction of three enterprises in a single production system. The matrix method of dynamic programming establishes calculation formulas for design parameters: the share of the flow of gross output, which is sent by enterprises for the development of their own production. The quadratic functional is accepted as a criterion of optimality, the physical meaning of which is the expenditure of funds to support the stable functioning of the process. In this case, the final product of the production system, sent to external consumption should be maximum. The software product is created and the optimum decision is received. Modeling in the modeling system of MVTP 3.7 of the process of interaction of three enterprises for three variants is performed. The option with optimal design parameters provides an increase in the production capacity of enterprises and corresponds to the area of rational values of the shares of intermediate products of enterprises, which is established by modeling.

MODERNIZATION OF LABORATORY ROLLING MILL 150 FOR THE FORMATION OF STUDENTS 'STUDIES OF AUTOMATION OBJECT RESEARCH.

It was fulfilled laboratory rolling mill 150 reconstruction for student’s investigation of rolling mill as automation object. For remote control screw down movement was mounted screw down auxiliary reductor with AC motor, screw down encoder, load cells, inverter with built-in PLC MS-300 and touch panel HMI DOP-103BQ. It was developed PLC and touch panel HMI software for control screw down movement. Software touch panel HMI provide with set point adjustment screw down movement and actual distance monitoring. Software inverter with built-in PLC MS-300 exercise control screw down movement and stopping in position set point without rundown. It was developed software for investigation of rolling force and electrical data’s of mill motor. Software provides measurement and memory of data’s and on-line graphic display. Measurement of rolling force and rolled metal thickness provides ability to build stand stiffness and rolled metal stiffness.

PARALLEL COMPUTING MODEL WITH CONTINUOUS TIME

The aim of this work is to construct a numerical-analytical method of designing efficient algorithms for solution of tasks having the parabolic type. Using a priori information about the smoothness of solutions, great attention is paid to the construction of solutions of high -order accuracy. Creation of parallel computing systems required the development of mathematical concepts for constructing parallel algorithms, i.e. algorithms adapted for implementation in these systems. As the basis for constructing the parallel algorithm we can take both: a sequential algorithm and the task itself as well. The most sensible at parallelization of sequential algorithm is pragmatic approach; actually sequential algorithms detect common elements which further are transformed to a parallel form. It is shown, that the algorithm of numerical - analytical vectorization has the maximal parallel form and, hence, minimally possible time for realization on parallel computing devices.