für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Rezhushchaya sposobnost` shlifoval`nogo kruga snizhaetsya s uvelicheniem narabotki vsledstvie zatupleniya i zasalivaniya ego rabochey poverkhnosti. Naibolee intensivno krug teryaet rezhushchuyu sposobnost` vsledstvie zasalivaniya pri shlifovanii zagotovok iz plastichnykh materialov, poskol`ku osnovnoy prichinoy zasalivaniya yavlyaetsya nalipanie chastits materiala (metalla) zagotovki na abrazivnye zerna, a protsess nalipaniya intensifitsiruetsya s uvelicheniem plasticheskikh svoystv materiala zagotovki. Privedeny novye teoreticheskie polozheniya o fiziko-mekhanicheskom vzaimodeystvii ob`ektov, kontaktiruyushchikh pri shlifovanii zagotovok iz plastichnykh staley i splavov. Razrabotany fizicheskie i matematicheskie modeli protsessa shlifovaniya zagotovok iz plastichnykh materialov. predlozheny novye tekhnologicheskie metody povysheniya i stabilizatsii rezhushchey sposobnosti kruga putem minimizatsii ego zasalivaniya. Kniga prednaznachena dlya nauchnykh i inzhenerno-tekhnicheskikh rabotnikov, spetsializiruyushchikhsya na reshenii problem shlifovaniya zagotovok, i budet polezna aspirantam, magistrantam i studentam mashinostroitel`nykh spetsial`nostey vysshikh uchebnykh zavedeniy. ····· 103615222
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray V monografii rassmotreny osnovnye printsipy upravleniya sovremennym mashinostroitel`nym proizvodstvom i v pervuyu ochered`, tekhnologicheskimi marshrutami v ramkakh ERP- i MES- sistem. Rassmotrena metodologiya avtomatizirovannogo formirovaniya al`ternativnykh variantov tekhnologicheskikh marshrutov po integral`nym pokazatelyam na etapakh proektirovaniya, planirovaniya i podgotovki proizvodstva s uchetom tekhnologii informatsionnoy podderzhki izdeliy (CALS-tekhnologii). Predlozheno primenenie intellektual`nykh modeley dlya upravleniya organizatsionno-tekhnologicheskoy sistemy proizvodstva na osnove bazy znaniy. Predstavlena metodika formirovaniya proizvodstvennogo raspisaniya na osnove bazy pretsedentov i pravil dlya postroeniya dereva variantov i posleduyushchego vybora optimal`nogo iz nikh po proizvodstvenno-ekonomicheskim pokazatelyam. ····· 103615209
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray V knige privedeny raschetnye modeli protsessov formoobrazovaniya tonko-stennykh tsilindricheskikh obolochek na valkovykh mashinakh. V pervoy glave privedeny uravneniya izgiba tremya valkami pri bol`shikh peremeshcheniyakh tsentral`nogo valka. Rassmatrivayutsya uprugaya, uprugoplasticheskaya i zhestkoplasticheskaya stadii protsessa do obrazovaniya `plasticheskogo sharnira`. Vo vtoroy glave privedena model` formoobrazovaniya tsilindricheskoy obolochki na trekhvalkovoy mashine s nepodvizhnymi osyami opornykh valkov. V etom protsesse smeshchenie tsentral`nogo valka periodicheski chereduetsya s vrashcheniem valkov. Pri vykhode iz zony izgiba zagotovka poluchaet ostatochnuyu kriviznu posle uprugoy razgruzki. V tret`ey glave privedena model` formoobrazovaniya tsilindricheskoy obolochki na chetyrekhvalkovoy mashine s dvumya tsentral`nymi valkami, obespechivayushchimi skhemu blizkuyu k `zashchemleniyu` zagotovki, i dvumya bokovymi valkami s podvizhnoy os`yu, kotorye vypolnyayut `podgib` kontsov zagotovki s maloy kriviznoy. Razrabotannye modeli mogut byt` poleznymi inzheneram pri konstruirovanii valkovykh mashin i razrabotke programmnogo obespecheniya dlya upravleniya protsessom formoobrazovaniya obolochki. ····· 103615076
für 80.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Vibroudarnaya tekhnika i tekhnologii shiroko primenyayutsya v gornom dele, stroitel`stve, energetike, mashinostroenii, kommunal`nom khozyaystve. Praktika ikh sozdaniya i sovershenstvovaniya trebuet primeneniya rezul`tatov nauchnykh issledovaniy v oblasti teorii udara i udarnykh protsessov. V sushchestvuyushchikh uchebnykh kursakh eti teorii izlagayutsya ochen` kratko, i otsutstvuet uchebnaya literatura, obobshchayushchaya nakoplennye k nastoyashchemu vremeni rezul`taty i metody issledovaniy v etom napravlenii. Kniga yavlyaetsya popytkoy v kakoy-to mere vospolnit` etot probel. V ney rassmatrivayutsya modeli i metody rascheta razlichnykh udarnykh sistem, naibolee udobnye dlya primeneniya v inzhenernoy praktike. Privodyatsya primery ispol`zovaniya etikh metodov dlya rascheta udarnykh sistem buril`nykh i otboynykh mashin. Avtor nadeetsya, chto kniga budet polezna dlya studentov i aspirantov, izuchayushchikh distsipliny `Analiticheskaya dinamika i teoriya kolebaniy`, `Dinamika mashin`, a takzhe dlya molodykh uchenykh i inzhenerov, zanimayushchikhsya sozdaniem i issledovaniem vibroudarnykh mashin i tekhnologiy. ····· 103614945
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray V monografii izlozheny printsipial`no novye ponyatiya teorii kinematicheskikh par, osnovannye na predstavlenii geometricheskikh elementov zven`ev v vide poverkhnostey, otlichayushchikhsya ikh gaussovoy kriviznoy. Pokazan algoritm obrazovaniya kinematicheskikh par, opredeleny parametry ikh klassifikatsii i sozdany tablitsy kinematicheskikh par. Monografiya prednaznachena dlya studentov mekhanicheskikh spetsial`nostey, izuchayushchikh kurs teorii mekhanizmov i mashin v polnom ob`eme, a takzhe dlya aspirantov i inzhenerov mekhannikov. ····· 103614941
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Tsel`yu izdaniya yavlyaetsya oznakomlenie chitatelya v oblasti diagnostiki neftegazovogo oborudovaniya, dlya chego izlozheny bazovye polozheniya o konstruktsionnykh materialakh, klassifikatsiya defektov, metody i sredstva tekhnicheskoy diagnostiki, a tak zhe voprosy nerazrushayushchego kontrolya i otsenki sostoyaniya uzlov (detaley) neftegazovogo oborudovaniya. Poluchennye znaniya mogut byt` polezny kak obuchayushchimsya v vysshikh uchebnykh zavedeniyakh, tak i spetsialistam v oblasti promyshlennoy bezopasnosti pri prakticheskom ispol`zovaniya v inzhenernoy praktike. ····· 103614851
für 32.31€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Ce sujet a été mené au cours d`un projet dans l`organisme SNTRI tunisie , il s`agit de faire une implantation d`un banc d`essai d`injecteurs électronique pour les moteurs à essence des véhicules afin de le mettre en marche dans les condition nécessaire (électriquement,mécaniquement) pour tester le fonctionnement des injecteurs et définir leur état a partir des courbes simulé par l`oscilloscope et les valeur dégagé a fin de ce test . ····· 103614754
für 44.91€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray L`une des difficultés majeures de la technique de production des monocristaux réside dans le contrôle de l`homogénéité du champ hydrodynamique et thermique au voisinage de l`interface solide-liquide. Les inhomogénéités locales dans le cristal solide nuisent la qualité du produit. Dans ce travail, nous examinons les instabilités du champ de l`écoulement lors du changement de phase. Alors, nous considérons une cavité rectangulaire rempli d`un métal liquide, en cours de changement de phase et exposée à un champ magnétique externe uniforme de différentes orientations et intensités. L`approche numérique de résolution est basée sur la méthode des volumes finis. L`instabilité de l`écoulement dans la partie fluide de la cavité se manifeste par la formation des cellules principale et secondaires, et sous forme des oscillations régulières du champ de vitesse/thermique. Le champ magnétique provoque un changement notable de la structure de l`écoulement, et de température. La variation du nombre de Grashof critiques et les fréquences dominantes (critiques) des oscillations en présence du champ magnétique constituent les diagrammes de stabilité magnétique. ····· 103614733
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Defective products are mostly delivered from production process. These products must be rejected or reworked. But the worst thing is when the rejected amount is excessive as it causes unproductiveness, drop off the market competency due to higher customers dissatisfaction. There are many causes for the occurrence of defective products. Thus to avoid any further spoilage corrective measures should be taken. The main theme of this book is to increase market competency and productivity as well as to enhance profit by minimizing defective products in Ethiopian manufacturing industries. In the investigation, core quality related problems and the causes of excessive defects in Gafat Engineering Factory , which is taken as a case for the study, have been found out. And ultimately, new manufacturing practices are recommended as a means for alleviating the problem. It is also examined its impact on the profit of manufacturing industries by producing quality products. ····· 103613745
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray There are current worldwide pressures and the challenges facing industrial organizations is to reduce manufacturing costs in order to compete effectively. Maintenance cost forms an enormous part of the manufacturing cost, and this has led to the continuous search for a cost-effective maintenance practice such as condition-based maintenance. This book therefore provides a stepwise approach for the determination of the need for condition monitoring, the selection of equipment to be monitored, the implementation of a complete condition monitoring system as well as operating the condition monitoring system. It also provides details on how to identify the different faults associated with different machine components, with special reference to Cement and Coal Plants. This book should be useful especially to professionals in the field of maintenance or anyone else who may be interested in fully implementing Condition-based maintenance. ····· 103613738
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Variable compression ratio is becoming increasingly desirable as oil prices increase and car buyers have an increased interest in fuel economy. The cylinder head can be altered by using a hydraulic system which is connected to the crank shaft and responds according to the load and acceleration required. Increasingly stringent emissions and fuel economy standards have long remained a source of challenges for research in automobile engine technology development towards the more thermally efficient and less polluting engine. Spark ignition (SI) engines have lower part-load efficiency when compared with the diesel engines. The greatest opportunity for improving SI engine efficiency is by way of higher compression ratio, variable valve timing, low friction, reducing throttling losses, boosting, and down-sizing. Variable compression ratio (VCR) technology has long been recognized as a method for improving the fuel economy of SI engines. The concept of variable compression ratio (VCR) promises improved engine performance, efficiency, and reduced emissions. ····· 103613594
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In a world economy where globalization reaches almost every corner, the need for a company to attain flexibility has acquired tremendous importance to remain competitive and profitable. This study is about explaining what constitutes flexibility in manufacturing systems along with its different ramifications, it is about showing the importance of flexible systems and its benefits in the manufacturing industry focusing primary in the Auto Industry. This study would present the importance of flexibility in times of uncertain conditions (natural and socio-economic), it would present an analysis of the struggle of Toyota Motors Manufacturing Texas and one of its on-site suppliers Futaba Industrial Texas FIT to attain Manufacturing Flexibility through different economic crisis and a natural disaster presenting its strategies to mitigate economic losses and cope with the turbulent environment by developing robust systems. ····· 103613278
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The selection of small-diameter propellers for Micro-Air Vehicle (MAV) applications are usually carried out arbitrarily due to non-existence of performance data. The presence of vast performance data for larger propellers cannot be applied to these small-diameter propellers that operate at low Reynolds numbers, and the aerodynamic performance data at these low Reynolds numbers seldom exists. Analytical method such as momentum-blade element theory together with computational methods such as CFD can be relied upon to design and optimise the performance of propellers of any class. In the current work, the design and performance evaluation of a propeller applicable to a MAV is carried out for a given thrust of 1 N, diameter of 120 mm and speed of 10,000 rpm. The design was based on one-dimensional momentum theory. Design modifications were done by varying the blade setting angle at 75% radius to enhance the performance of the propeller. As a result, the maximum efficiency was obtained for a blade setting angle of 40°. Experimental data available in the literature were used to validate the CFD solution procedure applied to predict the performance characteristics of the propeller. ····· 103613161
für 55.71€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Welding is an important and versatile fabrication process that is used in almost all the industries. There are several welding processes which are being used one of them is the friction welding, which is now extensively considered by many industries for its possible use for many specialized purposes. Friction welding has many advantages over the other welding processes such as low production cost, ability to weld dissimilar metals, as well as plastics, non requirement of filler metal and less heat effected zone. A friction welding setup was fabricated with appropriate modifications on a conventional lathe machine. The main objective of present study is to optimize the process parameters for achieving reliable friction welds between Mild Steel bars. Two process parameters namely rotational speed and axial pressure were selected for optimization after a comprehensive literature review. Friction welded specimens were made on the setup using 25mm, 30mm and 34mm diameter MS rods by application of several combinations of the axial pressure and speed of rotation. Axial pressures were applied in the range of 60-135kg/cm² whereas rotational speed was varied in the range of 520-1200rpm. ····· 103613154
für 35.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray En este trabajo se estudiaron las fibras de bambú (Guadua angustifolia), con el propósito de conocer su potencial como refuerzo mecánico en materiales compuestos poliméricos. Los haces vasculares fueron extraidos del culmo mediante una digestión química alcalina y un proceso kraft. Posteriormente, fueron sometidos a ensayos de tensión para determinar su resistencia y rigidez. Estas propiedades fueron caracterizadas de forma probabilística. Se implementó un modelo numérico para encontrar las propiedades mecánicas de los materiales compuestos reforzados con fibras orientadas aleatoriamente. Finalmente, se hicieron simulaciones que permitieron validar el modelo y predecir el comportamiento mecánico de los materiales compuestos poliméricos reforzados con fibras de guadua. Los resultados de las simulaciones evidenciaron que dichas fibras tienen un gran potencial para ser utilizadas como refuerzo de polímeros. La rigidez de los materiales simulados resulta comparable a la de los compuestos reforzados con fibras de vidrio, siempre y cuando la participación volumétrica de fibras sea inferior a 50%, aproximadamente. ····· 103613145
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Esta obra pretende guiar al lector en el diseño de un modelo de sistema dinámico, utilizando un lenguaje basado en el método de los elementos finitos. El propósito es demostrar la potencia de la herramienta de los elementos finitos para resolver problemas dinámicos complejos próximos a la realidad, argumentando las decisiones tomadas en cada paso, estudiando los resultados obtenidos y extrayendo conclusiones importantes de los ensayos. ····· 103612997
für 35.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray En el libro se presenta información sobre el impacto de los cojinetes de rodamientos en la industria y en la economía mundial, destacándose estos elementos de máquinas como uno de los componentes mecánicos con mayores y múltiples aplicaciones en la industria y en el transporte. Además, se refiere la importancia de la normalización internacional en la promoción del uso de los rodamientos y son estudiadas las bases de la selección de los cojinetes de rodamiento fundamentadas en la elección del tipo y el tamaño.La elección del tipo de rodamiento se presenta en el libro con orientación a la magnitud y dirección de las cargas, la capacidad de autoalineación, el montaje y desmontaje, las exigencias en dimensiones radiales y axiales, la velocidad de rotación nominal, el tipo de lubricación, la necesidad de desplazamiento de los apoyos y el costo. El libro está dirigido a profesionales y personas en general con interés de actualización en los procedimientos internacionales de selección de cojinetes de rodamientos y es de utilidad para ingenieros y diseñadores mecánicos, tecnólogos vinculados al cálculo y selección de rodamientos y profesores de cálculo de elementos de máquinas. ····· 103612934
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Este estudio pretende determinar en qué medida las variables del proceso afectan el anodizado del aluminio Al3003 y Al6063. Para ello, se realizaron estudios de la microdureza, rugosidad, espesor de capa y porosidad de la superficie anodizada, utilizando la metodología de análisis experimental multifactorial y diseño robusto. Se establecieron los siguientes rangos de las variables: temperatura [15°C, 25°C], tiempo [30min 60min], concentración de electrolito [1,2M 2M], densidad de corriente [1Amp/dm2 3Amp/dm2], aluminio [3003,6063], y como variable de ruido, la deformación plástica [0%,10%,20%,30%]. A los resultados se les realizó un análisis de varianza (ANOVA), para determinar los factores significativos, la probabilidad de que los efectos se deban a otros factores de ruido, y la robustez de los efectos independientemente de la variabilidad de los factores del proceso. ····· 103612785
für 62.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray El presente trabajo expone un procedimiento de diseño y optimización de procesos combinados de deformación plástica multietapa denominados embutición, reembutición y estirado, independientes en su definición y formulación científica. La combinación de los mismos dependerá tanto de la geometría de la pieza a obtener como del material a emplear en su fabricación. Así mismo, diferentes subprocesos y fenómenos se toman en cuenta para la definición de los mismos. El trabajo aporta también un sistema integrado, implementado en una herramienta informática desarrollada en el entorno de Java, que proporciona una solución científica básica y analítica de las etapas intermedias que conforman el proceso, desde el material de partida hasta el producto final, optimizando a su vez la energía consumida en el proceso, el tiempo de fabricación y los costes. ····· 103612631· 1 · ::::: · 76 ·· 77 ·· 78 ·· 79 ·· 80 ·· 81 ·· 82 · ::::: · 83 ·
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