Проектирование технологического процесса изготовления цилиндра и оснастки

РЕФЕРАТ Выпускная квалификационная работа 98 с., 12 рис., 27 табл., 7 источников, 6 прил. Ключевые слова: цилиндр, оснастка, литье, сверление, приспособление, технологический процесс. Объектом исследования является проектирование технологического процесса изготовления цилиндра Цель работы: проектирование технологического процесса изготовления цилиндра и оснастки В процессе исследования проводились анализ технологического процесса, технико-экономическая анализ, конструирование приспособления для сверления В результате выполнения работы был разработан технологический процесс изготовления детали цилиндр и сконструировано приспособление для сверления Основные конструктивные, технологические и технико-эксплуатационные характеристики: сконструированное приспособление для сверлABSTRACT Final qualifying work 98 p., 12 Fig., 27 tab., 7 springs, 6 ADJ. Key words: cylinder, tooling, casting, drilling, fitting, process. The object of study is (are) the Design of technological process of manufacturing of cylinder Goal – to Design the technological process of manufacturing of cylinder and snap In the process of investigation the analysis of the technological feasibility analysis, designing fixtures for drilling The result of the work was developed technological process of manufacturing parts and the cylinder fixture is designed for drilling The basic constructive, technological, technical-operational and features: the fixture is Designed for drilling consists of a casing, rod rack, cover, cylinder, prisms and the plate conductor. Level of implementation: the te

Araracuara, un nuevo género de Rhamnaceae de la Amazonía colombiana

Se describe e ilustra Araracuara Fern. Alonso, un nuevo género de la familia Rhamnaceae conocido tan sólo de las mesetas de arenisca de la Amazonía colombiana. Se discuten sus posibles afinidades en la familia y se sugiere que estaríamos ante un género relíctico, relacionado con el pantropical Colubrina y en menor medida con el amazónico Ampelozizyphus. Se incluye una clave para los géneros de Rhamnaceae de Colombia y un apéndice con una muestra representativa de especies de los géneros estudiados, algunos de ellos pobremente documentados de territorio colombiano.Peer reviewe

Information Subsystem of Shadow Economy Deactivation

The article presents information subsystem of shadow economy deactivation aimed at minimizing negative effects caused by its reproduction. In Russia, as well as in other countries, efficient implementation of the suggested system of shadow economy deactivation can be ensured by the developed information subsystem

The fracture behavior of Cr2AlC coatings

The erosion - and self-healing - behavior of Cr2AlC MAX phase coatings has been investigated [1]. It is well known that Cr2AlC coatings can be deposited at temperatures of around 450 °C [2], which is significantly lower than for other MAX phase systems, which often require growth temperatures around 900 °C [3]. To further explore the applicability of the Cr2AlC system in harsh environments, it is necessary to determine its mechanical response. Recent advances in micromechanical testing allow investigating the mechanical properties of hard coatings, especially the fracture behavior, which is of particular interest for several thin film applications. Furthermore, it is possible to deposit the Cr2AlC system with different microstructures, e.g. nanocrystalline or amorphous [2]. Preliminary results revealed a fracture toughness of ~2 MPam1/2 for a coating with columnar morphology. In this investigation, the effect of morphology and microstructure on the fracture toughness of Cr2AlC coatings will be presented. References [1] D. Eichner, A. Schlieter, C. Leyens, L. Shang, S. Shayestehaminzadeh, J.M. Schneider, Solid particle erosion behavior of nanolaminated Cr2AlC films, Wear. 402–403 (2018) 187–195. doi:10.1016/j.wear.2018.02.014. [2] C. Walter, D.P. Sigumonrong, T. El-Raghy, J.M. Schneider, Towards large area deposition of Cr2AlC on steel, Thin Solid Films. 515 (2006) 389–393. doi:10.1016/j.tsf.2005.12.219. [3] P. Eklund, M. Beckers, U. Jansson, H. Högberg, L. Hultman, The Mn+1AXn phases: Materials science and thin-film processing, Thin Solid Films. 518 (2010) 1851–1878. doi:10.1016/j.tsf.2009.07.184