Заглавие:Пресмятане на зъбни колела от вискозоеластични материали
Автор:Сгурева, Иванка Николаева; Sgureva, Ivanka Nikolaeva; Христова, Евелина Любчова; Hristova, Evelina LyubchovaДата:1995Резюме: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 ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Пресмятане на гъвкави тръбопроводи от полимерни материали
Автор:Сгурева, Иванка Николаева; Sgureva, Ivanka Nikolaeva; Христова, Евелина Любчова; Hristova, Evelina LyubchovaДата:1995Резюме: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 ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Изследване на новосинтезирани съединения като стабилизатори за LLDX - композиции
Автор:Аламинов, Александър Христов; Alaminov, Alexander Hristov; Албадауи, Вержиния Петрова; Albadaoui, Verginia Petrova; Маринова, Атанасия Тодорова; Marinova, Atanasia TodorovaДата:1995Резюме: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 ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Радиационна модификация на изолационни поливинилхлоридни композиции
Автор:Маринова, Атанасия Тодорова; Marinova, Atanasia Todorova; Аламинов, Александър Христов; Alaminov, Alexander Hristov; Албадауи, Вержиния Петрова; Albadaoui, Verginia PetrovaДата:1995Резюме: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 ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Брикетиране на дървесно-лигнинови смеси за пречистване на утайки от ПСОВ, използувани при компостиране
Автор:Камбуров, Валентин Вълков; Kambourov, Valentin Valkov; Маринова, Светла Гарванска; Marinova, Svеtla Garvanska; ДимитроВа, Виолета Димитрова; Dimitrova, Violeta Dimitrova; Романски, Иван Генчев; Romansky, Ivan GenchevДата:1995Резюме: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, ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Зони на разпространение на атмосферни замърсители при бензиностанции със системи за възстановяване на бензинови изпарения
Автор:Романски, Иван Генчев; Romansky, Ivan Genchev; Камбуров, Валентин Вълков; Kambourov, Valentin Valkov; Цанков, Любен Иванов; Tzankov, Lyuben Ivanov; Шипчанова, Ирена Александрова; Shipchanova, Irena AlexandrovaДата:1995Резюме: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 ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Размишления върху компютърния анализ и синтез на динамични модели с половин степен на свобода
Автор:Стоев, Теодоси Манолов; Stoev, Teodosi ManolovДата:1995Резюме: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 синтезБиблиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Синтез на коляно-мотовилков механизъм при строги изисквания за скорост и ускорение на изпълнителното звено
Автор:Гарабитов, Стефан Ангелов; Garabitov, Stephan Angelov; Христов, Веселин; Christov, VeselinДата:1995Резюме: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 ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Синтез на примкообразуващо устройство
Автор:Тодоров, Тодор Стоилов; Todorov, Todor StoilovДата:1995Резюме: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 ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Възможности за рекуперация на кинетична енергия с многодисков рекуператор и степенна трансмисия
Автор:Маринов, Филип Павлов; Marinov, Philip PavlovДата:1995Резюме: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 ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Кинематични съображения при синтез на трансмисии с плавно изменение на предавателното отношение
Автор:Маринов, Филип Димитров; Marinov, Philip Dimitrov; Живков, Венелин Стоянов; Jivkov, Venelyn StoyanovДата:1995Резюме: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.Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Масова конфигурация на равничен механизъм с минимална вариация на кшетичната енергия
Автор:Вълчев, Иван Георгиев; Valtchev, Ivan GeorgievДата:1995Резюме: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 ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Сравнителен геометричен анализ на профилите на генераторни гърбици за вълнови предавки
Автор:Гълъбов, Витан Борисов; Galabov, Vitan Borisov; Андонов, Аспарух Любомиров; Andonov, Asparuch LubomirovДата:1995Резюме: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 evolutesБиблиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Изследване на демпфирането в опорите на вретената на металорежещи машини
Автор:Борисов, Борислав Стоянов; Borisov, Borislav StoyanovДата:1995Резюме: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 ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Изследване на устойчивостта на металорежещи машини на ocнoвaтa на линейни и нелинейни математични модели
Автор:Борисов, Борислав Стоянов; Borisov, Borislav StoyanovДата:1995Резюме: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.Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Елементи на изрязвания слои метал при фрезоване с профилни фрези с конструктивно подаване по профила на зъбите
Автор:Данаилов, Панчо Костов; Danailov, Pancho KostovДата:1995Резюме: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 ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Профилна фреза с конструктивно подаване по профила на зъбите
Автор:Данаилов, Панчо Костов; Danailov, Pancho KostovДата:1995Резюме: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 ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Експериментално изследване на силите нл рязане при нестационарен процес на фрезоване
Автор:Георгиев, Иван Андонов; Georgiev, Ivan Andonov; Петров, Димитър Крумов; Petrov, Dimilar KrumovДата:1995Резюме: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 simulationБиблиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Моделиране силите на рязане при нестационарен процес на фрезоване
Автор:Петров, Димитър Крумов; Petrov, Dimilar Krumov; Георгиев, Иван Андонов; Georgiev, Ivan AndonovДата:1995Резюме: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 ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Третиране на стъпални свредла на установка "УЛТРАМИТ"
Автор:Македонски, Александър Иванов; Makedonski, Alexander IvanovДата:1995Резюме: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 ...Библиотека: