The object of the research of the presented article is the internal axisymmetric cylindrical flanging. This work is intended to improve the quality and accelerate the development of technology for flanging round holes from sheet blanks and designing tooling by improving the accuracy of calculating the diameter of the flanging holes in the automated mode for constructing three-dimensional models of a blank and a flanged product. Formulas are proposed that increase the accuracy of calculating the diameter of the hole for flanging. The accuracy of calculating the diameter of the flange hole according to the proposed formulas is determined by comparing the mass of the workpiece with the mass of the flanged part. The algorithm for the automated construction of a sketch of a flanged part and the determination of technological parameters is implemented in KOMPAS-3D. The constructed models allow making changes to their parameters and to provide automatic presentation of the calculation results, as well as their correct graphical interpretation. A discussion of the results of the work allows drawing conclusions about the correctness of the proposed mathematical model and its applicability to the automated construction of three-dimensional models of flanged parts, which will simplify the development of technological and design documentation with a simultaneous increase in their accuracy and reduce the cost of preparing the production.

The present paper considers a hydraulic unit of high-pressure plunger pump that relates to the main types of equipment for oil-and-gas well drilling, completing or repairing. The problem of fatigue breakdowns of hydraulic units of high-pressure plunger pumps is posed in the paper. According to the leading pump manufacturers, the main source of stress concentration in a valve casing of a pump is the edgings of crossing of cylindrical surfaces of seating fits, valves or plunger bores. The value of stresses in the concentrator zone was assessed, and values of safety coefficients of fatigue strength depending on geometric parameters of stress concentrators were compared. To solve the problem set by the leading manufacturers of pumps, the full-scale model of hydraulic unit was elaborated, stress condition and its effect on fatigue parameters of valve casing of hydraulic unit of oilfield high-pressure plunger pump were analyzed. The obtained calculation results quantitatively clarify the pattern of stress distribution in zones of stress concentration in a valve casing of hydraulic unit of a high-pressure plunger pump. Certain conclusions were made on how the parameters under consideration affect the values of fatigue stresses and on priority research directions for the problem under study.

АннотацияВ статье представлено описание автоматизированной разработки в программе КОМПАС-3D библиотеки трехмерных моделей одной из составных частей приводов -ременной передачи. Ременную передачу широко применяют в различных машинах, в том числе сельскохозяйственного назначения. При проектировании приводов на этапе эскизного проекта часто необходимо с целью его оптимизации осуществить выбор двигателя (его тип, мощность, частоту оборотов), параметров ременной передачи: ремней, шкивов. Целесообразно варьирование при выборе элементов передачи выполнять в компоновочном режиме с использованием трехмерных моделей. Это позволяет выбрать наиболее удачный вариант расположения составных частей с точки зрения функциональных и эксплуатационных характеристик, а также экономической целесообразности. Для решения этой задачи необходима библиотека элементов привода, предпочтительно представленных в виде трехмерных моделей. Такой подход обусловлен тем, что компоненты данной передачи стандартизованы либо полностью, либо их форма и размеры. В работе представлена автоматизация создания библиотеки с использованием ресурсов (окно и таблица переменных) системы КОМПАС-3D. Ключевые словаБиблиотека компонентов, трехмерные модели, автоматизированная разработка, КОМПАС-3D, окно и таблица переменных, компоновочный режим. AbstractIn article, the description of the automated development is presented in the KOMPAS-3D program of library of threedimensional models of one of components of drives -the belt drive. The belt drive is widely used in various cars, including agricultural purpose. At design of drives at a stage of the outline sketch it is often necessary to carry out for the purpose of its optimization the choice of the engine (its type, power, frequency of turns), parameters of the belt drive: belts, pulleys. It is expedient to carry out variation at the choice of elements of transfer in the layout mode with use of three-dimensional models. It allows to choose the most successful option of an arrangement of components from the point of view of functional and operational characteristics and also economic feasibility. The library of the elements of the drive which are preferably presented in the form of three-dimensional models is necessary for the solution of this task. Such approach is connected with the fact that components of this transfer are standardized or completely, or their form and the sizes. In work automation of creation of library with use of resources (a window and the table of variables) of the KOMPAS-3D system is presented. KeywordsLibrary of components, three-dimensional models, the automated development, KOMPAS-3D, a window and the table of variables, the layout mode.

Трапезонд и Остролист, что позволит получить сырье высокого качества с пониженной токсичностью, а также снизить энергозатраты на его производство.

The article provides analysis of existing structures of lock supports for fixation of plug-in rod-type downhole pumps. Based on the analysis, the connection of the lock support elements and the pump is evaluated. Description is given of the new structure of the lock support equipped with a set of spring-loaded and radially extendable sliders. The latter have conical surfaces interacting in forward and reverse directions with pump armature. The proposed design has high variability, which allows to perform modeling of the product both at the stage of design and at the stage of implementation.