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Implementation of Lean Concepts to increase OEE of Critical Machines

für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray
In today s competitive world, Companies expect the improvements for growth with SMART (Specific, Measurable, Achievable, Realistic, Timed) objectives. Many KPI s have been developed among which, Equipment measurement is one of the important factors to decide the overall plant performance. For the above measurement, a quantifiable indicator is Overall Equipment Effectiveness (OEE) which should be 85% as per World Class Manufacturing. Equipment Effectiveness influences productivity, costs and quality. Higher values of equipment effectiveness indicate plant has minimized or eliminated wastages that arise from equipment related problem resulting in better productivity. This Book focuses on improving of OEE by addressing & solving of six major losses with proper methodology & corrective action methods. This book emphasizes on Problem Analysis with QC and Management Planning tools such as Root cause analysis, 5 Why analysis, Cause & Effect diagram, problem solving methodologies, Implementation of Maintenance systems, Standardized work and Low cost automation techniques. ····· 1036198830

Diagnostics and Prognostics

für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray
In recent decades, condition-based maintenance (CBM) is acknowledged a cost-effective and widely used maintenance program for engineering systems. Diagnostics and prognostics are critical components of CBM responsible for offering information about present and future system conditions. These two components are respectively an integrated process covering several aspects that are essential for successful implementations of diagnostics and prognostics. For diagnostics, data to be used should be clean and useful. Data cleaning can provide clean data by removing outliers caused by noise, while feature selection can select useful characteristic features for fault classification. For prognostics, noise may appear in condition indicator values. Using such noisy values may result in unreliable predictions for prognostics. A method is thus demanded to provide predictions without noise effects. Support vector machine (SVM), a machine learning method, is recognized having good generalization ability and an effective tool for classification and prediction needed by diagnostics and prognostics. This book explores the potentials of SVM for addressing above problems in diagnostics and prognostics. ····· 1036198756

Low Temperature Combustion Diesel Engines

für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray
Diesel engines are the most common type of internal combustion engines due to their prolific usage in the transportation and power generation industries. This widespread use has led to a large push within the engine industry to improve emissions and efficiencies through novel combustion methods. Low temperature combustion methods have shown great promise in the ability to decrease nitric oxide and soot emissions from diesel engines. This study develops an engine model for the analysis of low temperature combustion operating modes within a diesel engine. It is used to conduct parametric studies on the use of exhaust gas recirculation and injection timing to determine the most efficient combinations for low temperature combustion. A challenge associated with low temperature combustion is increased pressure rise rates inside the cylinder. This can cause increased engine noise and possible damage to the cylinder. This study also analyzes methods that decrease the cylinder pressure rise rates that can be present during low temperature combustion. All of this combined allows for an efficient low temperature combustion mode that leads to decreased emissions for engine applications. ····· 1036198734

Pull Production Implementation

für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray
The concept of Pull production means to respond to the needs of customers. Lean companies design their operations to be more responsive to the varied and changing needs of their customers. Lean companies that are able to create such an operation can avoid the more traditional batch-and-queue method, which is generally acknowledged to be the worst way to process material through a factory. A more continuous flow results in items being moved immediately from one workstation to the next as soon as they are ready. Planning for the delivery of a product to customers becomes more efficient and demand from customers becomes more stable. ····· 1036198726

Structured uncertainty modelling for robust control

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In safety-critical applications it is expected that stability and performance are guaranteed even if the system dynamics are subjected to disturbances and uncertainties. Mu-synthesis methods are well known, powerful tools of designing robust feedback controllers for complex systems where uncertainties are modelled by structured sets. The book extends the Mu-synthesis framework by addressing the problem from the data-based modelling side. The book tries to characterize the way how to arrive at an efficient description of structured uncertainties and disturbances for complex systems that is not in-validated by experimental data, and is optimized for robust performance. The book leads the reader to the fields of research known as robust control, and iterative identification and control. Based on these disciplines it develops an optimization technique which facilitates both uncertainty modelling and robust feedback control design in order to achieve improved robust performance of the controlled system. ····· 1036198687

Abrasive Electrical Discharge Machining (AEDM)

für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray
Modern industrial applications are increasing rapidly leading to the development of advanced materials such as metal matrix composites (MMCs). Machining of MMCs via conventional machining is often difficult. Thus, non-conventional machining methods like electric discharge machining (EDM), a thermal process, is being successfully employed for easy machining of MMCs. The EDMed top surface layer comprises of recast (white) layer which is generally removed by supplementary processes such as hand polishing, etching etc, leading to increased cost and time. Abrasive Electrical Discharge Machining (AEDM), is a hybrid process, in which free abrasive grains are mixed in the dielectric fluid. It is characterized by the mutual assistance of mechanical interaction (abrasion) and thermal interaction (electrical spark erosion). The present work presents the details of an experimental investigations carried out on 6061Al-Al2O3p-20% MMCs using the machining mechanisms with conventional EDM and AEDM with the addition of SiC abrasive powder in the dielectric and using copper tool electrode, so as to compare the benefits of hybrid process. ····· 1036198657

Shape memory alloys under multiaxial loadings

für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray
The interest in the mechanical behavior of shape memory alloys (SMAs) is rapidly growing with the increasing number of potential industrial applications. In most applications, SMAs experience general non-proportional thermo-mechanical loadings. Thus, according to experimental observations, the so-called variant reorientation should be considered in the constitutive model development. In this monograph, the SMA behavior under multiaxial loadings at small and finite deformations is investigated. It is shown that most available SMA models are basically the same under proportional loadings while they yield different results under non-proportional loading conditions. Based on the multiplicative decomposition of the deformation gradient into elastic and inelastic, several finite deformation SMA constitutive models are proposed. A model which utilizes interesting properties of the logarithmic strain is also introduced. A part of this monograph is devoted to numerical implementation of the proposed constitutive models. Several SMA-based applications, i.e., an SMA spring, a Nitinol stent and a smart micro-gripper are simulated. ····· 1036198593

Development and Design Optimization of Laminated Composite Structures

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This book is written from the research work carried out for Doctoral research studies of Dr.G.Narayana Naik at the Indian Institute of Science, Bangalore, India. The composite materials has been widely used in all fields of Engineering such as Aerospace, Automobile, Civil, Mechanical, Chemical, Electrical, Electronics, Medical, Nanotechnology, Biotechnology etc. The failure in a composite is a complex process because failure is mainly based on the initiating failure mechanisms. No single failure criterion predicts all the initiating failure mechanisms in a composite subjected to loadings. Hence, development of new failure criterion called the Failure Mechanism Based Failure Criterion is presented in this book. Additionally, design optimization of composite structures using nature inspired optimization techniques such as Genetic Algorithms and Particle Swarm Optimization are presented in this book. This book deals about the comparison of different failure criteria, development of new failure criterion, design optimization of composites. Hence, this book will be useful for graduate students, researchers, practising professionals, faculties etc. ····· 1036198592

Effect Of Geometry On Quality Of Casting In Gravity Casting Process

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As in any Casting process, Gravity die casting process has a significant rejection due to defective casting process. There are many factors which affects these defects in the component. One of the main reasons is the improper design of the component itself. If the component geometry is properly studied and analyzed, it can effectively reduce the defects arising in the casting of a component. Design For Manufacturability (DFM) during the component design stage eliminates the need for tool correction and re-tooling at the later stage of product life cycle which will indirectly increase the cost of the end product. The main objective of this research work is to study the geometry of the Gravity Casting Part , understand the defect pattern using Non destructive testing and thermal analysis and relate the geometry parameters to the induced defect in the casting. The idea is also to prepare a set of recommendation as a tool for Design for Manufacturability for Gravity Casting Process. ····· 1036198567

Tribology of Metal Matrix Composites

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In today s world low weight and high efficiency with no compromise to mechanical properties is the main area of attention of researcher s. In this arena design of composite materials is emerging as the challenging field of research. With the design of Metal Matrix Composites (MMC s) one can achieve tailor made properties, which otherwise are impossible to achieve out of single material. In this book, liquid metallurgy technique has been suggested to develop Aluminum-Silicon Carbide (Al-SiC) Metal Matrix Composite (MMC s). Then emphasis has been made to characterize the tribological properties of the MMC s with its focused application in the automobile sector. ····· 1036198516

Air Flow Patterns in Coal Mines

für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray
Coal has been and remains an important source of energy for the generation of electricity worldwide. It is extracted from the ground by various mining techniques and currently presents one of the most dangerous working environments for humans. Accidents in coal mines are reported with alarming regularity in media. The two main factors that are directly linked to the dangers in mining of coal are the risk for explosions and inhalation of gases such as methane and coal dust. In light of the hazards with airborne pollutants, it is critical to ensure an adequate and efficient ventilation of the mine. From a safety point of view, one should ensure that there is a high exchange rate of air in every passage in the mine to keep the concentration of pollutants to a minimum however, from an economical point of view, the cost in doing so would be prohibitive. This project addresses the ventilation of mines from a modeling and simulation point of view: After a literature review of various ventilation systems and existing models for ventilation in a coal mine, the author will derive a simple yet efficient model that can be solved for a mine after calibration. ····· 1036198513

Creep

für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray
This monograph deals with various aspects of creep of AISI 310S stainless steels. All the chapters have been developed with utmost care for the easy understanding of the researchers and practicing engineers. Inclusion of plenty of figures, well documented tables and all equations of models is the salient feature of this book. The real objective of this book could be honestly fulfilled when the research students of Materials, Metallurgical and Aerospace faculty s right fully exploit the resourceful content of this book, to the maximum best. In its organization, the book looks like a textbook on high temperature materials and so, universities can implement the ideas enlisted in this book. Chapters on modeling are available dealing mechanisms of deformation and fracture and phase stability. Mathematical analysts in application oriented aspects can pick up models discussed in this book and go deep in this matter. This book is written based on a work on the creep of a super-alloy stainless steels and so provides information to augment creep research in these materials. ····· 1036198502

Surface Partitioning for 3+2-axis Machining

für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray
Despite the inbuilt advantages offered by 5-axis machining, the manufacturing industry has not widely adopted this technology due to the high cost of machines and insufficient support from CAD/CAM systems. Companies are used to 3-axis machining and the operators are in many cases not yet ready for 5-axis machining in terms of training and programming. An effective solution for this 5 axis problem is a graduated migration through the use of 3+2-axis machining. The objective of this research is to develop and implement a machining technique that uses the simplicity of 3-axis tool positioning and the flexibility of 5-axis tool orientation, to machine complex surfaces. This work presents the application of well known methods from Pattern Recognition and newly developed methods by the current author that were adapted for surface machining. This work includes an explanation of the procedures required to determine an appropriate tool orientation, feed direction, tool path trajectory and tool parameters for patch-by-patch machining. These parameters are determined independently for each patch and aim at reducing the time required to machine a surface while maintaining the surface specific. ····· 1036198324

Otsenka i snizhenie mekhanicheskikh poter` v porshnevykh dvigatelyakh

für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray
V knige izlozheny sovremennye nauchnye predstavleniya o prirode vozniknoveniya mekhanicheskikh poter` v porshnevykh dvigatelyakh, opisany metody teoreticheskogo analiza i rascheta sil treniya i iznosa v osnovnykh dvizhushchikhsya sopryazheniyakh. Izlozheny ranee ne publikovavshiesya metody izmereniya malykh izmeneniy mekhanicheskikh poter`, printsipy sozdaniya energosberegayushchikh konstruktsiy i materialov, privedeny vzaimosvyazi mekhanicheskikh poter` s opredelyayushchimi pokazatelyami dvigatelya. Dany realizovannye na praktike primery snizheniya mekhanicheskikh poter`. Tsel` nastoyashchego izdaniya predostavit` chitatelyam rasshirennyy i uglublennyy material po mekhanicheskim poteryam, sposobam ikh rascheta, izmereniya i snizheniya v porshnevykh mashinakh. Istochnikom svedeniy, izlozhennykh v knige, yavilis` sobstvennye issledovaniya v oblasti rascheta i optimizatsii tribologicheskikh protsessov, opyt raboty na Vladimirskom traktornom zavode, sotrudnichestvo s AMO `ZiL` i otdeleniem porshnevykh kompressorov firmy `LG Electronics`, materialy vypolnennykh dissertatsiy, polozhitel`nye rezul`taty ispol`zovaniya v proizvodstve rekomendatsiy i avtorskikh tekhnicheskikh resheniy na urovne izobreteniy. ····· 1036192595

Synthesis, Simulation and Sensitivity Analysis Of Quick Return Mechanism

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In this Book, mathematical approach is discussed to synthesize the Quick Return Mechanism for desired output and specified input. The effect of variation in link length/s on the performance of Quick Return Mechanism is also discussed. The approach also helps in identification of most sensitive link/s in the mechanism. Computer programme in C sharp is also developed for the synthesis of Quick Return Mechanism, along with the optimized scheme of tolerance for desired permissible variation in the Stroke length (output). An optimum combination of linkages helps in selection of type of machine required for machining operation. The approach will also help in reducing the cost of manufacturing by providing optimum set of tolerance on individual link/s. ····· 1036192529

Friction Surfacing of Aluminium Alloys

für 29.61€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray
Friction surfacing is a solid state technique that aroused interest, special to process thermo-sensitive materials, since it avoids the melted phase preventing the formation of intermetallics at in interface and the variation of the base material properties due to heat affection. These features make this technology suitable for hardfacing or corrosion protection coatings, as well as for repairing worn parts. The present study analyzed the influence of operating processing parameters in the production of coatings, using AA6082-T6 rods, over AA2024-T3 substrates. A metallurgic and mechanical characterization was carried out revealing a fine equiaxial grained microstructure with enhanced mechanical properties. When compared to the as received rod material, the ultimate tensile strength improved by 25%, while the strain increased by 42% and the wear rate was reduced by 24%. ····· 1036192416

Static Recovery of a Clad Aluminum Alloy After Cold Rolling

für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray
This book presents an experimental study of the evolution of microstructure and mechanical properties of a clad aluminum alloy during post-deformation heat treatment processes. The clad aluminum alloy studied is a popular automotive aluminum alloy called Fusion, manufactured by Novelis Inc. The alloy system includes a core AA6XXX heat treatable aluminum alloy clad with a softer AA3003 series alloy. Microstructural parameters are studied using a novel X-ray diffraction peak broadening method. Evolution of microstructural parameters and mechanical properties during heat treatment schedules is observed in order to characterize the static recovery behaviour of the alloy. Very different recovery behaviours are observed at the inter-alloy region and in the monolithic layers. Through-thickness variation in recovery behaviour of the alloy is explained from a physical metallurgical stand point. Although the recovery behaviour of different monolithic aluminum alloys is well investigated, but similar study at the inter-alloy region of a composite aluminum alloy is a novel approach, and presented here for the first time. A Master s dissertation by Debartha Bag, Queen s University, Canada. ····· 1036192371

Heuristic for Reverse Logistics of non-conform Material

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In any company where supply of materials exists, the decisions of recovering non-conform materials are relevant. This paper studies these decisions in an aerospace company, which its finished product has a long production and supply cycles with a high cost, what demands that the time of this recovery be as short as possible. The non-conform material has different destinies, being recovered through the return to the supplier or authorized workshop, or still to be destroyed. This paper uses the knowledge of the Reverse Logistics as a support for that recovery decision, however under the customer s point of view and not of the supplier as most of the literature presents. A lot of times, the cost of that recovery is much larger than the one of a new acquisition and in that specific type of industry 95% of the bought material is imported turning the reverse logistics still more difficult. This work proposes the use of a heuristic model, which decides the destiny of the non-conform materials. The parameters for measures of acting of that model are the comparison of data of the report of items recovered by the company studied against the data obtained by the heuristic model. ····· 1036192364

Spectral-RaNS Method

für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray
Direct numerical simulation of turbulence is usually carried out using spectral-Chebyshev method. However, Chebyshev basis are not optimal in any sense, therefore, one has to use a certain number of modes to obtain reasonable results and this number of modes increases as Reynolds number increase. This would have never been an obstacle if there exist a set of functions that are ordered in turbulent kinetic energy sense, i.e, the lower mode contains most of the energy and so forth. The only available mathematical method to extract such an optimal basis is the POD method. However, POD method needs the two-point correlation of the entire flow field to be implemented. This book introduces a new method to extract such optimal basis from spectral equations that govern the flow field. Moreover, the book describes how this method can be used to model turbulence. This book will interest mechanical, chemical, aerospace, civil, and environmental engineers. Applied mathematicians and physicists who are interested in turbulence will find the book helpful as well. ····· 1036192316

Position Control of Ultrasonic Linear Motor

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An ultrasonic linear motor has many excellent performances such as high precision, quick response, hard break with no backlash, high power to weight ratio and negligible EMI. A variety of ultrasonic linear motors have been developed and used as an actuator in motion control systems. In recent years, a number of control schemes have been proposed to control the position of ultrasonic linear motors, such as fuzzy reasoning control, neural network and adaptive control. However, these control schemes are complex and hard to apply to actual implementation. Hence, this book presents two-degree-of-freedom position control schemes for ultrasonic linear motor using pseudo-derivative control with feedforward gains (PDFF) controller and I-PD controller incorporating with an input shaper, both designed by the coefficient diagram method (CDM), which is an efficient and simple method to design the parameters of controllers. The effectiveness of the proposed control schemes is demonstrated by the several simulations and experiments. ····· 1036192265

Abrasive Water Suspension Jet Machining

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Rapid growth of high performance materials which are difficult to machine and the products with complex shapes necessitate the development of non-traditional machining process like Abrasive Water Jet(AWJ), since conventional machining of such materials are not technically/economically feasible. In AWJ material removal occurs due to erosion caused by the impact of high velocity abrasive particles entrained in waterjet. To enhance the cutting capability of AWJ, Abrasive Water Suspension Jet (AWSJ) is developed in which the machining is achieved by high velocity suspension jet of polymerized water and abrasives. To derive the potential benefits of this technology in machining wide range of materials and to enhance the field of application, there is a need to optimize the process settings which will reduce machining cost. This book provides information on experimental study of the combined effect of process parameters on the machining performance of AWSJ using new Zycoprint polymer for suspension preparation and parameter optimization using Taguchi designs. This book should be useful to waterjet professionals, researchers and academia who are interested in conducting experimental work. ····· 1036192182

ANFIS Control for Robotic Manipulators

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Robots are highly reliable, dependable and technologically advanced factory equipment. The basic architecture of most commercial robots is fundamentally the same, consists of digital servo controlled electrical motor drives on serial-link kinematic machines, usually with no more than six axes (degrees of freedom). All are supplied with a proprietary controller. Virtually all robot applications require significant design and implementation effort by engineers and technicians. Each robot is unique considering the manner in which the components are put together to achieve performance that yields a competitive product. The most important considerations in the application of an industrial robot center on two issues: manipulation and integration. Through the years considerable research effort has been made in their controller design. In order to achieve accurate trajectory tracking and good control performance, a number of control schemes have been developed. Amongst these, ANFIS (Adaptive Neuro-Fuzzy Inference System) has provided best results for control of robotic manipulators as compared to the conventional control strategies. ····· 1036192045

A Text Book of Statistical Quality Control

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In the 1980 s, the issue of Quality Control (QC) became a national concern in the United States. Quality is a challenge that must be taken up by Quality Engineer. The Quality Engineer needs a thorough knowledge of the Statistical Methods to control the quality. The object of this book is to enrich the knowledge of Quality Engineer in Statistical Methods of Quality Control. In this Text Book basic statistical methods are addressed it include those associated with statistical process control and capability analysis. The book gives some background of process control, explains several important concepts such as special and common causes of variation, and introduces the control chart, a very effective tool for process control. The book also describes the construction and use of control charts for variables data (quantitative data, or measurements) - X-bar & R charts, X & MR charts, median charts. ····· 1036191991

Electrochemical Machining of Internal Conical Shapes

für 49.41€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray
Electrochemical machining of internal conical shape (ECMICS) is one of non-conventional machining processes. The main application of ECMICS is for making small, accurate and high surface finish internal tapers for many applications such as the orifice of the fuel injectors and the hard metal which cannot be machined by any other machining process. A laboratory for ECMICS was started in Minia Univ. comprising principally of electrochemical machining unit with the necessary instruments. Sodium Chloride solution of 200 gm/liter concentration was selected as a working electrolyte Specimens were subjected to practical trials to explore the various operating parameters governing the process and their relations. This book shows the optimum conditions for ECMICS. Furthermore, it gives a helpful guide for the scientific researchers and the industrial units to optimize their experiments and decrease the production costs through many estimated-parameters and results- relations which could be applied in many fields. ····· 1036191915

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