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TECHNICAL UNIVERSITY - SOFIA: Recent submissions

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Title: Пресмятане на зъбни колела от вискозоеластични материали Author: Сгурева, Иванка Николаева; Sgureva, Ivanka Nikolaeva; Христова, Евелина Любчова; Hristova, Evelina Lyubchova Date: 1995 Abstract: Methods for calculating of polymeric materials gears,based on the hereditary theory of viscoelasticity has been developed. In the formulas for calculating of the contact strength and deformation of the gears,all the functions of elastic constants are replaced by corresponding operators. The methods has been applied for calculating of ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Пресмятане на гъвкави тръбопроводи от полимерни материали Author: Сгурева, Иванка Николаева; Sgureva, Ivanka Nikolaeva; Христова, Евелина Любчова; Hristova, Evelina Lyubchova Date: 1995 Abstract: Methods for calculating of flexible pipelines made of visco-elastic materials,based on the elastic solution for flexible fibers,has been proposed.The following cases have been considered handing up on the same or different levels with small and big slacks.The results have been compared with those,obtained from the evaluations for thick-walled ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Изследване на новосинтезирани съединения като стабилизатори за LLDX - композиции Author: Аламинов, Александър Христов; Alaminov, Alexander Hristov; Албадауи, Вержиния Петрова; Albadaoui, Verginia Petrova; Маринова, Атанасия Тодорова; Marinova, Atanasia Todorova Date: 1995 Abstract: Newly synthesized adducts of cyanuric acid, melamine and o-phosphoric acid have been studied. The static thermal stability and the kinetic of destruction have been determined in samples using thermogravimetric analysis. It was found that the additives, containing barium.zinc and cadmium in concentrations up to 3 vol % rize thermal stability ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Радиационна модификация на изолационни поливинилхлоридни композиции Author: Маринова, Атанасия Тодорова; Marinova, Atanasia Todorova; Аламинов, Александър Христов; Alaminov, Alexander Hristov; Албадауи, Вержиния Петрова; Albadaoui, Verginia Petrova Date: 1995 Abstract: Radiation-chemical modification of polymers is a present-day method for receiving electro insulating materials with enhanced operating properties and low prime cost Modification of model and industrial insulating PVC-compositions has been carried out using ionizing radiations - y - radiation “Co and radiation with accelerated electrons in ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Брикетиране на дървесно-лигнинови смеси за пречистване на утайки от ПСОВ, използувани при компостиране Author: Камбуров, Валентин Вълков; Kambourov, Valentin Valkov; Маринова, Светла Гарванска; Marinova, Svеtla Garvanska; ДимитроВа, Виолета Димитрова; Dimitrova, Violeta Dimitrova; Романски, Иван Генчев; Romansky, Ivan Genchev Date: 1995 Abstract: Composting is a cost effective and environmentally sound alternative for stabilization of a domestic waste water sludge. By possible utilization of those product in agriculture a sludge organic matter and nutrients could be recycled. A typical composting components are dewatered sludge mixed to a bulking agents consist of wood chips, straw, ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Зони на разпространение на атмосферни замърсители при бензиностанции със системи за възстановяване на бензинови изпарения Author: Романски, Иван Генчев; Romansky, Ivan Genchev; Камбуров, Валентин Вълков; Kambourov, Valentin Valkov; Цанков, Любен Иванов; Tzankov, Lyuben Ivanov; Шипчанова, Ирена Александрова; Shipchanova, Irena Alexandrova Date: 1995 Abstract: Air pollution within an area of petrol stations during filling of the station and cars is a problem for solving not only by petrol distribution companies but also by regional inspectorates of environment. A limitation of petrol vapors is connected to better air quality near to the station and fuel saving. On this way are also restricted ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Размишления върху компютърния анализ и синтез на динамични модели с половин степен на свобода Author: Стоев, Теодоси Манолов; Stoev, Teodosi Manolov Date: 1995 Abstract: Разгледани са динамични модели за приведени сили зависещи от положението и скоростта.Направен е анализ на известни и нови приблизителни методи.Показани са графики, получени от компютърен синтез Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Синтез на коляно-мотовилков механизъм при строги изисквания за скорост и ускорение на изпълнителното звено Author: Гарабитов, Стефан Ангелов; Garabitov, Stephan Angelov; Христов, Веселин; Christov, Veselin Date: 1995 Abstract: The case we are considering is an evahiation of the traditional method for synthesis of the crank mechanism with requirements about displacement, velocity and acceleration of the actuating link. With already definite parameters of the mechanism exact law of motion of the guide link is defined giving the velocity and acceleration of the ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Синтез на примкообразуващо устройство Author: Тодоров, Тодор Стоилов; Todorov, Todor Stoilov Date: 1995 Abstract: This paper presents a dimensional synthesis method for loop-forming device of machine for non woven textile coverings The output link displacement of this device is fulfilled by Watt six-link mechanism The loop-forming process is a result of synchronize motion of the output link and a transport link, which accomplishes uniform rotation. The ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Възможности за рекуперация на кинетична енергия с многодисков рекуператор и степенна трансмисия Author: Маринов, Филип Павлов; Marinov, Philip Pavlov Date: 1995 Abstract: A multiple flywheel with a conventional transmission has been studied for the purpose of storing and recuperating kinetic energy. A numerical algorithm to compute the recuperated energy by the system has been developed, and was applied to optimize the system. The real field, concerning the number of transmission stages and the number of ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Кинематични съображения при синтез на трансмисии с плавно изменение на предавателното отношение Author: Маринов, Филип Димитров; Marinov, Philip Dimitrov; Живков, Венелин Стоянов; Jivkov, Venelyn Stoyanov Date: 1995 Abstract: Continuously variable transmissions (CVT) composed of a differential gear and a variable-speed drive have been analysed. The possibilities for linking of a variable- speed drive with differential gear have been investigated and the gear ratio equations have been derived for every particular case. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Масова конфигурация на равничен механизъм с минимална вариация на кшетичната енергия Author: Вълчев, Иван Георгиев; Valtchev, Ivan Georgiev Date: 1995 Abstract: The papers deals with the problem of controlling the fluctuation of the kinetic energy of a linkage through redistribution of mass of links. A criterion for minimization is proposed, in a derived form of a superposition of first and second harmonics of each of controlled parameters. A computational procedure is realized, based on detached ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Сравнителен геометричен анализ на профилите на генераторни гърбици за вълнови предавки Author: Гълъбов, Витан Борисов; Galabov, Vitan Borisov; Андонов, Аспарух Любомиров; Andonov, Asparuch Lubomirov Date: 1995 Abstract: A complete geometrical analysis is done of the most spread profiles of generator cames for harmonic drives with the aim to control their elaboration and decoding (he existing cames. It is made a geometrical analysis of the came profiles by comparison of their extreme radii of curvature and the relations of the semi-axis of their evolutes Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Изследване на демпфирането в опорите на вретената на металорежещи машини Author: Борисов, Борислав Стоянов; Borisov, Borislav Stoyanov Date: 1995 Abstract: The paper deals with results of an investigation of the dam¬ping capacity of double-row plain roller bearings with adjustable radial clearance used as a machine tool spindle bearing in connection with its radial clearance/tightness. Damping capacity of spindle bearings is discussed taking into account type of the thrust bearing when spindle ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Изследване на устойчивостта на металорежещи машини на ocнoвaтa на линейни и нелинейни математични модели Author: Борисов, Борислав Стоянов; Borisov, Borislav Stoyanov Date: 1995 Abstract: A program package for machine tool dynamic stability investigation is created on the base of linear and non-linear mathematical models. The program package makes it possible to investigate the dynamic behavior of machine tool parts and the same of the machine tool as whole at the first stages of engineering design. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Елементи на изрязвания слои метал при фрезоване с профилни фрези с конструктивно подаване по профила на зъбите Author: Данаилов, Панчо Костов; Danailov, Pancho Kostov Date: 1995 Abstract: The cut and it* dimension* - local thickness of cut, width of cut and cross-sectional area of the cut ha* considered in Billing with a convex half-round Milling cutter with interrupted cuting edje* - constructive feed motion. The local thickness of cut (hi) ha* defined as a difference between spherical radius R and radius of curvature JO ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Профилна фреза с конструктивно подаване по профила на зъбите Author: Данаилов, Панчо Костов; Danailov, Pancho Kostov Date: 1995 Abstract: It has considered a convex half-round Billing cutter with interrupted cuting edjes, so called silling cutter with constructive feed notion along the tool profile. This silling cutter has changed and controllable diagraa of the cut - the profile diagraa has changed with serial one. The serial diagraa has realized with chip divide channels ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Експериментално изследване на силите нл рязане при нестационарен процес на фрезоване Author: Георгиев, Иван Андонов; Georgiev, Ivan Andonov; Петров, Димитър Крумов; Petrov, Dimilar Krumov Date: 1995 Abstract: Cutting forces at non-stationary milling process are defined using a new created method and statistical models for relative cutting forces are found. A trigonometric transform between cutting forces in fixed and moving coordinate systems is used and the theoretical model is verified using statistical simulation Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Моделиране силите на рязане при нестационарен процес на фрезоване Author: Петров, Димитър Крумов; Petrov, Dimilar Krumov; Георгиев, Иван Андонов; Georgiev, Ivan Andonov Date: 1995 Abstract: The cutting forces at non-stationary face milling are anaiized. At the each moment of cutting the cross section as well as the mean integral value of cutting metal depth are defined by computer simulation. It is assumed that the relative cutting forces are function of all the cutting process parameters. At the each moment of cutting both ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Третиране на стъпални свредла на установка "УЛТРАМИТ" Author: Македонски, Александър Иванов; Makedonski, Alexander Ivanov Date: 1995 Abstract: Treatment of step drills at "ULTRAMIT" stand Alexander Makedonski Under the actual conditions of production at "G. Kostov" Company - Sofia the tested meta 1-cuting tools are compared on their cuting possibilities, expressed by the durability T- respectively the number of the holes bored in the part "Body". The purpose of the test is that ... Library:
TECHNICAL UNIVERSITY - SOFIA