Кафедра "Інтегровані технології машинобудування ім. М. Ф. Семка"

Постійне посилання колекціїhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/3115

Офіційний сайт кафедри http://web.kpi.kharkov.ua/cutting

Від 2005 року кафедра має назву "Інтегровані технології машинобудування" ім. М. Ф. Семка, попередня назва – "Різання матеріалів та різальні інструменти".

Кафедра заснована в 1885 році. Свої витоки вона веде від кафедри механічної технології (у подальшому – кафедра загального машинобудування, кафедра холодної обробки матеріалів, кафедра різання матеріалів та різальних інструментів).

Засновником і першим завідувачем кафедри був фундатор технологічної підготовки інженерів-механіків в ХТПІ Костянтин Олексійович Зворикін.

Кафедра входить до складу Навчально-наукового інституту механічної інженерії і транспорту Національного технічного університету "Харківський політехнічний інститут і є провідним науково-дослідним і освітнім центром України в галузі високих інтегрованих технологій у машинобудуванні. У науковій школі кафедри різання матеріалів підготовлені 18 докторів технічних наук і 104 кандидата технічних наук.

У складі науково-педагогічного колективу кафедри працюють: 3 доктора технічних наук, 9 кандидатів технічних наук; 3 співробітника мають звання професора, 6 – доцента.

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2020 - 20224

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Автор: search.filters.author.Vaysman, V. O.

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Зараз показуємо 1 - 4 з 4
  • Ескіз
    Документ
    The effect of elastic recoil of closed-type lifting ropes after their manufacture and drawing
    (Національний технічний університет "Харківський політехнічний інститут", 2022) Kurgan, V. O.; Sydorenko, I. I.; Vaysman, V. O.; Pavlyshko, A.; Litvinov, V. F.; Vovk, V.
    A study was made of stresses and factors of internal forces in the elements of ropes of a closed structure during their manufacture. It is established that when twisting a rope of closed construction, its shaped wires suffer from bending deformation, twisting and stretching. In this case, the shaped wires are subjected to a complex load with the concomitant rotation of the axes of the stress tensor. The stresses in the elastic cross-sectional area of the rope wire are considered and its limit is determined for shaped cross-sections and for asymmetric shaped cross-sections. Formulas for approximate determination of tangential and normal stresses in the elements of a closed rope of noncircular profile are obtained: (wedge-shaped, zeta-shaped and x-shaped).
  • Ескіз
    Документ
    Improving grinding of gear wheels applied in gearboxes of power engineering
    (Національний технічний університет "Харківський політехнічний інститут", 2021) Yakimov, O.; Uminsky, S.; Klimenko, N.; Kirkopulo, K. G.; Pavlyshko, A.; Vaysman, V. O.
    Development of modem power engineering follows the line of continuous increase in speed, coefficient of corrosive action and capacity of units. Gears and reducers are responsible parts of modem machinery and occupy an important place in the domestic power engineering construction. Durability and wear resistance of gears, apart from the design factors, also depends on the technological methods of treatment. The final stage of production of such wheels is the operation of gear grinding. In the process of gear grinding in a thin surface ball there are complex thermomechanical processes. As a result of short-time heating to high temperatures, structural transformations, burns, and in some cases even micro- and macro-thicknesses occur in such a surface bail. In addition, there are cases of making tooth wheels with adjacent defects grinding (for example, the appearance of the surface of the ball teeth of large tensioning forces), which reduces the life of the work, and in some cases causes a breakdown of the teeth in operating conditions. Development of effective measures to ensure the quality ofthe surface of the ball on the operation of grinding baggage in part depends on the possibility of predicting (or calculation) of temperatures and residual loads on the depth of the cemented teeth ball. The method of calculation of internal surplus Toads occurring during grinding of wheels with cemented steels is suggested. On the basis of the performed calculations and experiments the ways to improve the quality ofproduction of working surfaces of gears, which are used in the wits ofthermal and nuclear power plants are suggested and grounded.
  • Ескіз
    Документ
    Influence of the geometric characteristics of the discontinuous profile working surfaces of abrasive wheels for precision and temperature when grinding
    (Національний технічний університет "Харківський політехнічний інститут", 2021) Yakimov, A.; Bovnegra, L.; Tonkonogyi, V.; Vaysman, V. O.; Strelbitskyi, V.; Sinko, I.
    Grinding is the most common finishing method for hardened steel parts. Grinding is accompanied by a large heat release in the cutting area, under the influence of which structural changes appear in the thin surface of the processed parts, tensile stress and even microcracks, which significantly reduce the operational reliability of machines that include these parts. The use of abrasive wheels with an intermittent working surface makes it possible to reduce the temperature in the area of contact of abrasive grains with the material of the workpiece and, as a consequence, stabilize the quality of the surface layer of the workpieces. High-frequency vibrations in the elastic system of the machine, accompanying the work of an intermittent wheel, are a positive factor that reduces the energy consumption of the grinding process. However, under certain conditions of dynamic interaction of the tool with the workpiece, parametric resonance may occur, which worsens the geometric and physical-mechanical parameters of the quality of the surface layer of the processed part. The aim of the work is to realize the possibility of predicting the quality parameters of the surface layer of parts during intermittent grinding by studying the influence of the design features of the macrotopography of the working surface of abrasive wheels and processing modes on the nature of the dynamic interaction of the tool with the workpiece and the heat stress in the cutting area. It was found that the parametric vibrations of the elastic system of the machine tool can be shifted to a more stable area, due to an increase in the number of interruptions of the working surface of the abrasive whee l with a constant ratio of the length of the protrusions and depressions. The increase in the number of breaks on the wheel also contributes to a decrease in temperature in the cutting area. It was found that to maintain the stable operation of the elastic system of the machine, it is necessary to reduce the number of cavities on the grinding wheel with an increase in the cutting speed. However, both of these actions are accompanied by an increase in the heat stress of the grinding process. It has been experimentally established that for ordinary (pendulum) grinding, it is possible to achieve an increase in processing productivity by increasing the speed of the longitudinal movement of the table.
  • Ескіз
    Документ
    Mathematical modeling of transmission start with an asynchronous electric motor
    (Національний технічний університет "Харківський політехнічний інститут", 2020) Kurgan, V. O.; Sydorenko, I. I.; Litvinov, V. F.; Vaysman, V. O.; Kirkopulo, K. G.; Kulik, V. P.
    The most difficult moment in the work with an asynchronous motor is the launch. And the more powerful drive is the more difficult launch. This is due to certain features of the asynchronous motors: a limited starting torque and starting throws of the current of the stator motor chain. The mathematical modeling of oscillating process of actuation of the actuator with an asynchronous motor, which includes an elastic coupling with nonlinear mechanical feedback, is carried out. The influence of the type of elastic characteristics of the coupling on the magnitude of the amplitude and frequency of the oscillation process and its time was studied. A single-mass rotational system model was used for the studies. According to the Runge-Kutta method, the oscillation processes of starting the transmission of a machine unit with an induction motor were investigated. To determine the coefficient of vibration isolation, a system with an elastic coupling having a linear elastic characteristic was calculated. A study was also conducted in the case where the coupling determines the elastic characteristics of the Duffing type "soft" and "hard" type.