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Etude Experimentale De Lusinage En Finition Des Formes Complexes
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Book Synopsis Etude expérimentale de l'usinage en finition des formes complexes by : Mohamed Boujelbene
Download or read book Etude expérimentale de l'usinage en finition des formes complexes written by Mohamed Boujelbene and published by . This book was released on 2002 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Une analyse technico-économique du processus de fabrication des empreintes des moules et en particulier des moules pour l'injection plastique, secteur à très forte valeur ajoutée, est développée. L'état de l'art concernant les matériaux à usiner, et en particulier l'acier SP 300 prétraité à 300 HB et 1000 MPa, est résumé ainsi que les fraises de forme - matériau et revêtement, géométrie-, et les machines-outils multi-axes appropriées. La précision de l'usinage d'une part, et l'amélioration de l'état de surface des surfaces usinées en finition en vue de la minimisation des opérations de polissage après fraisage pour l'obtention d'un fini industriel d'autre part, sont parmi les objectifs principaux à atteindre dans le cas de l'usinage des formes complexes caractéristiques des moules et matrices. Le résultat des travaux réalisés montre que la précision d'usinage et l'amélioration de la qualité d'état de surface dépendent à la fois des paramètres opératoires d'usinage (avance, vitesse de coupe, profondeur de passe axiale, profondeur de passe radiale, stratégie d'usinage...), des interactions entre le matériau usiné et l'outil coupant, du comportement de la machine-outil et du mode de génération de la trajectoire de l'outil. Par ailleurs, le résultat de l'analyse tridimensionnelle de l'état de surface des pièces usinées de formes gauches montre que les défauts micro-géométriques générés par une programmation de trajectoires continues en tangence sont nettement moins élevés que ceux obtenus avec les trajectoires classiques à base d'interpolations linéaires. Ces travaux ont confirmé aussi que le fraisage multi-axes à grande vitesse améliore considérablement la qualité d'état de surface en assurant la précision géométrique et la précision dimensionnelle.
Book Synopsis Contribution à l'étude expérimentale et à la modélisation de l'usinage des pièces de grandes dimensions by : Naoual Sabkhi
Download or read book Contribution à l'étude expérimentale et à la modélisation de l'usinage des pièces de grandes dimensions written by Naoual Sabkhi and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le travail de recherche réalisé dans le cadre de cette thèse introduit une nouvelle approche thermomécanique pour la modélisation du procédé de taillage à la fraise-mère et la maitrise de la précision géométrique et la qualité des pièces fabriquées. Le processus de coupe de la génération des dentures des couronnes de grandes dimensions a été simulé pour la prédiction des efforts de coupe. Le calcul de ces efforts s'est basé sur trois phases : une phase de simulation de l''intersection géométrique entre l'outil et la pièce moyennant une simulation de la cinématique du procédé par le logiciel CATIA, une phase de simulation numérique ALE (Approche Eulérienne-Lagrangienne) 2D de la coupe orthogonale, et une dernière phase dite 'simulation mécanistique' qui utilise les résultats des deux premières phases pour la prédiction des efforts de coupe. La présente approche conduit à un modèle de prédiction des efforts de coupe 3D pour le processus de taillage et apparaît comme une alternative intéressante à l'approche classique de la littérature qui nécessite beaucoup d'essais expérimentaux pour déterminer les coefficients spécifiques de coupe caractéristique du matériau usiné. Nous avons également proposé une approche prédictive basée sur une modélisation analytique de l'interaction arête-copeau lors d'une opération de taillage en finition. La démarche proposée présente l'intérêt de s'affranchir des essais d'usinage, souvent longs et couteux, dans le cas de cette opération complexe (gabarit et géométrie des pièces, cinématique, formation de copeau, etc.). Enfin, le modèle proposé a été appliqué pour analyser le taillage des grandes couronnes (plusieurs mètres) en phase de finition.
Book Synopsis Etude experimentale de l'usinage a haute vitesse des pieces a parois minces by : Jean-Pierre Michaud
Download or read book Etude experimentale de l'usinage a haute vitesse des pieces a parois minces written by Jean-Pierre Michaud and published by . This book was released on 2007 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Specifiquement, ce memoire vise l'amelioration de la qualite du fini de surface et l'optimisation du taux d'enlevement des operations d'usinage (ebauche et finition) d'une piece typique a parois minces en alliage d'aluminium 7050 T7451. Les travaux experimentaux executes consistent en l'usinage a haute vitesse de blocs d'aluminium dans lesquels trois plans d'experiences factoriels sont utilises pour analyser les effets et les influences des parametres d'usinage sur le fini de surface. L'analyse de ces effets permet conjointement l'optimisation du critere de la qualite du fini (Ra et Rvk) et du critere de productivite.
Book Synopsis Adhesion between polymers and concrete / Adhésion entre polymères et béton by : H. R. Sasse
Download or read book Adhesion between polymers and concrete / Adhésion entre polymères et béton written by H. R. Sasse and published by Springer. This book was released on 2013-11-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preface Adhesion is a phenomenon architects and civil engineers are not very familiar with. In other disciplines knowledge about surface properties and the background of bonding energies is also far from satisfactory; nevertheless there are many important· applications in concrete engineering, where adhesion is necessary for success and durability. These include: - coating and painting - repair of concrete surfaces - bonding of fresh to old concrete - crack injection - glueing of precast elements - glueing of steel to concrete, etc. In 1981 RILEM established the technical committee 52-RAC 'Resin Adherence to Concrete'. The main aims of the committee's work were - to collect research results and practical experiences - to initiate and coordinate research programs - to develop, on a scientific base, test methods for field and for laboratory purposes. One of the results of the committee's work is a state-of-the-art report, which will be presented orally as a General Report at the International Symposium ISAP '86, and will be printed either in the RILEM journal Materials and Structures or separately. Several test recommendations have been elaborated and will be prepared as drafts for the participants ofISAP '86. These are: - direct tensile test - pull-off test - direct shear test - slant shear test - four-point bending test - dynamic loading test - thermal compatibility test (two versions) - injectibility test.
Author :Norberto Lopez de Lacalle Publisher :Springer Science & Business Media ISBN 13 :1848003803 Total Pages :456 pages Book Rating :4.8/5 (48 download)
Book Synopsis Machine Tools for High Performance Machining by : Norberto Lopez de Lacalle
Download or read book Machine Tools for High Performance Machining written by Norberto Lopez de Lacalle and published by Springer Science & Business Media. This book was released on 2008-10-01 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Machine tools are the main production factor for many industrial applications in many important sectors. Recent developments in new motion devices and numerical control have lead to considerable technological improvements in machine tools. The use of five-axis machining centers has also spread, resulting in reductions in set-up and lead times. As a consequence, feed rates, cutting speed and chip section increased, whilst accuracy and precision have improved as well. Additionally, new cutting tools have been developed, combining tough substrates, optimal geometries and wear resistant coatings. “Machine Tools for High Performance Machining” describes in depth several aspects of machine structures, machine elements and control, and application. The basics, models and functions of each aspect are explained by experts from both academia and industry. Postgraduates, researchers and end users will all find this book an essential reference.
Download or read book Titanium Alloys written by Maciej Motyka and published by BoD – Books on Demand. This book was released on 2019-11-27 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Titanium alloys, due to unique physical and chemical properties (mainly high relative strength combined with very good corrosion resistance), are considered as an important structural metallic material used in hi-tech industries (e.g. aerospace, space technology). This book provides information on new manufacturing and processing methods of single- and two-phase titanium alloys. The eight chapters of this book are distributed over four sections. The first section (Introduction) indicates the main factors determining application areas of titanium and its alloys. The second section (Manufacturing, two chapters) concerns modern production methods for titanium and its alloys. The third section (Thermomechanical and surface treatment, three chapters) covers problems of thermomechanical processing and surface treatment used for single- and two-phase titanium alloys. The fourth section (Machining, two chapters) describes the recent results of high speed machining of Ti-6Al-4V alloy and the possibility of application of sustainable machining for titanium alloys.
Book Synopsis Machining of Titanium Alloys and Composites for Aerospace Applications by : Redouane Zitoune
Download or read book Machining of Titanium Alloys and Composites for Aerospace Applications written by Redouane Zitoune and published by Trans Tech Publications Ltd. This book was released on 2013-07-31 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Special topic volume with invited peer reviewed papers only
Author :International Livestock Research Institute Publisher :ILRI (aka ILCA and ILRAD) ISBN 13 :9789291460038 Total Pages :268 pages Book Rating :4.4/5 (6 download)
Book Synopsis Livestock Policy Analysis by : International Livestock Research Institute
Download or read book Livestock Policy Analysis written by International Livestock Research Institute and published by ILRI (aka ILCA and ILRAD). This book was released on 1995-01-01 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Policy concepts; Identification of policy issues; Production systems, supply and demand; Market, price and trade policies; Marketing and distribution systems; Budget and manpower planning; Land tenure police for the livestock sector; Policy analysis report writing and communication; Livestock production and marketing in alphabeta - a case study.
Book Synopsis Technology Of Machine Tools by : Arthur R. Gill
Download or read book Technology Of Machine Tools written by Arthur R. Gill and published by McGraw-Hill Education. This book was released on 2010-01-28 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technology of Machine Tools 7e provides state-of-the-art training for using machine tools in manufacturing technology, including up-to-date coverage of computer numerical control (CNC). It includes an overview of machine trades and career opportunities followed by theory and application. The text is structured to provide coverage of tools and measurement, machining tools and procedures, drilling and milling machines, computer-aided machining, and metallurgy. There is expanded coverage of computer-related technologies, including computer numerical control (CNC) and computer-aided design and manufacturing (CAD/CAM). New to the Seventh Edition of Technology of Machine Tools In addition to updating the text to reflect changes in the modern business/manufacturing world today – such as direct digital manufacturing,nantotechnology, and IDI – an entirely new section on Lean Manufacturing (Section 15) has been added to focus on this industry‐prominent philosophy. Units include: Continuous Improvement: Kaizan Pull (Kanban) Systems Total Productive Maintenance Value Stream Mapping Workplace Organization
Book Synopsis The Story of Crass by : George Berger
Download or read book The Story of Crass written by George Berger and published by . This book was released on 2009 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: In-depth interviews with the main movers in the punk rock movement--Crass members Penny Rimbaud, Gee Vaucher, and Steve Ignorant--detail the face of the revolution founded by these radical thinkers and artists. When punk ruled the waves, Crass waived the rules by putting out their own records, films, and magazines and setting up a series of situationist pranks that were dutifully covered by the world's press. Not just another iconoclastic band, Crass was a musical, social, and political phenomenon: commune dwellers that were rarely photographed and remained contemptuous of conventional pop stardom. As detailed in this history, their members explored and finally exhausted the possibilities of punk-led anarchy. This definitive biography of the band not only gives backstage access to their lives, philosophies, and the movement that followed, but also to never-before-seen photographs and rare dialogues.
Download or read book Transactions of ASME. written by and published by . This book was released on 1897 with total page 1288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis CIRP Annals by : International Institution for Production Engineering Research
Download or read book CIRP Annals written by International Institution for Production Engineering Research and published by . This book was released on 1988 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Methods in Industrial Forming Processes by : J. F. T. Pittman
Download or read book Numerical Methods in Industrial Forming Processes written by J. F. T. Pittman and published by . This book was released on 1982 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tropical Agriculturist and Magazine of the Ceylon Agricultural Society by :
Download or read book Tropical Agriculturist and Magazine of the Ceylon Agricultural Society written by and published by . This book was released on 1988 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water and Tribal Settlement in South-East Arabia by : J. C. Wilkinson
Download or read book Water and Tribal Settlement in South-East Arabia written by J. C. Wilkinson and published by Georg Olms. This book was released on 2013-05 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a study of the traditional relationships that exist in Oman between land and social organization, and how they have evolved. The author starts with the theme of aridity and, using the extensive literature of the 1200 year old Ibadi community to supplement his field work, shows how the techniques of water exploitation have influenced the country’s social organization and its political ideology. He describes how the settlement organization has evolved in two stages; the first in the years before Islam when the Persians irrigated the land using aflaj or horizontal water channels; the second after the Arabs had overthrown the Persians and, influenced by Ibadism, established a more democratic society dominated by a strong tribal structure in the villages. The tribal structure is then examined in detail and the author shows how close the links are between the Islamic ideology, land use, and social organization. As a contribution to the human geography of Oman as well as to general knowledge of the Middle East the book will interest Arabists, Islamic historians and social anthropologists, as well as hydrologists and geographers.
Book Synopsis Diffusion in Materials - DIMAT 2011 by : Igor Bezverkhyy
Download or read book Diffusion in Materials - DIMAT 2011 written by Igor Bezverkhyy and published by Trans Tech Publications Ltd. This book was released on 2012-04-12 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Conference on Diffusion in Materials (DIMAT) is the benchmark conference series for diffusion in solids. DIMAT 2011 was organized by the University of Bourgogne in association with CNRS, Dijon (France). The conference showcased new results concerning theoretical tools as well as applied research approaches. Diffusion processes affect all types of materials: nanomaterials, materials for energy, metallurgy, glasses and ceramics, but each requires its own numerical tools. Volume is indexed by Thomson Reuters CPCI-S (WoS). This volume comprises most of the contributions presented at DIMAT 2011: 4 plenary lectures delivered by famous high-level scientists plus 88 contributions in the form of keynote lectures, talks and posters.
