Download or read book Wire Electrical Discharge Truing of Metal Bond Diamond Grinding Wheels written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cylindrical wire EDM profile truing of the metal bond diamond wheel for precision form grinding of ceramics is presented in this report. First a corrosion-resistant, precise spindle with the high-electrical current capability for wire EDM truing of grinding wheel was fabricated. An arc profile was adopted in order to determine form tolerances capabilities of this process. Results show the wire EDM process can generate[micro]m-scale precision form on the diamond wheel efficiently. The wheel, after truing, was used to grind silicon nitride. Grinding forces, surface finish of ground components, and wheel wear were measured. The EDM trued wheel showed a reduction in grinding force from that of the stick dressed wheel. Surface finishes between the two truing methods were similar. In the beginning of the grinding, significant wheel wear rate was identified. The subsequent wheel wear rate stabilized and became considerably lower.

Download or read book Cylindrical Wire Electrical Discharge Truing of Metal Bond Diamond Grinding Wheels written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this research was to use the wire Electrical Discharge Machining (EDM) to profile a metal bond diamond grinding wheel, and then study the wear and grinding performance of the EDM trued wheel. Diamond wheels are known to exhibit low wheel wear for precision grinding of ceramics but create difficulty in creating precision trued forms. With the increased use of hard engineering ceramics in mechanical design, new methods of truing these wheels had to be investigated. In profiling a vitrified bond diamond wheel, a Computer Numerically Controlled (CNC) single point diamond or a diamond crush roll is often used. However, due to the high strength of the metal bond matrix, these methods cannot be implemented with a metal bond diamond wheel. Instead of applying a mechanical force, Wire Electrical Discharge Truing (WEDT) process utilizes electrical sparks to erode the metal matrix, which allows the non-conductive diamonds to simply fall away. A precision spindle was first built to rotate the wheel inside a traditional wire EDM machine. Once the process proved feasible, grinding studies were developed to compare the performance of a WEDT wheel against a diamond rotary trued/stick dressed wheel. Grinding force, surface finish of the ground silicon nitride parts, and wheel wear were all examined. The surfaces of both truing methods were compared using Stereo-Scanning Electron Microscopy to measure the protruding diamonds' height and identify the wear mechanism. Result of the research shows promise for the future use of WEDT as a truing method for metal bond wheels.

Download or read book Cylindrical Wire Electrical Discharge Truing of Metal Bond Diamond Grinding Wheels written by Brian Keith Rhoney and published by . This book was released on 2001 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: WEDM, profiling, precision, wheel truing, metal bond diamond wheel.

Download or read book Cylindrical Wire Electrical Discharge Machining of Metal Bond Diamond Wheels Part II Wheel Wear Mechanism written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of stereo scanning Electron Microscopy (SEM) to investigate the wear mechanism of the wire EDM true metal bond diamond wheel for ceramic grinding is presented. On the grinding wheel, a wedge-shape removal part was machined to enable the examination and measurement of the worn wheel surfaces using the stereo SEM. The stereo SEM was calibrated by comparing results of depth profile of a wear groove with the profilometer measurements. On the surface of the grinding wheel after wire EDM truing and before grinding, the diamond protruding heights were measured in the level of 35[micro]m, comparing to the 54[micro]m average size of the diamond in the grinding wheel. The gap between the EDM wire and rotating grinding wheel is estimated to be about 35 to 40[micro]m. This observation indicates that, during the wire EDM, electrical sparks occur between the metal bond and EDM wire, which leaves the diamond protruding in the gap between the wire and wheel. The protruding diamond is immediately fractured at the start of the grinding process, even under a light grinding condition. After heavy grinding, the grinding wheel surface and the diamond protrusion heights are also investigated using the stereo SEM. The height of diamond protrusion was estimated in the 5 to 15[micro]m range. This study has demonstrated the use of stereo SEM as a metrology tool to study the grinding wheel surface.

Download or read book Wire Electro Discharge Machining of Advanced Engineering Materials written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this research was to create models and guidelines for Wire Electrical Discharge Machining (WEDM) of new advanced engineering materials and for truing of metal bond diamond grinding wheels. The development of new advanced engineering materials and the need to meet demand for precise and flexible prototype and low-volume production of components has made WEDM an important manufacturing process. One goal of this research is to investigate the effect of spark on-time duration and spark on-time ratio, two critical WEDM process parameters, on truing of metal bond diamond grinding wheels and machining of three types of new advanced engineering materials; porous metal foams, sintered Nd-Fe-B magnets, and carbon-carbon composite fuel cell bipolar plates. An envelope of feasible process parameters for material removal rate is developed for each material, according to machine, tooling, and physical limitations. This envelope is then applied to cut sections of carbon-carbon bipolar plate and sintered Nd-Fe-B magnet to minimum thickness. Effect of process parameters on limit of thickness of the sintered Nd-Fe-B magnet is discussed. The surfaces machined by WEDM were qualitatively studied using Scanning Electron Microscopy to observe surface features and characteristics. Experiments were conducted to measure temperatures generated during the EDM process using infrared spectrometry on three different materials; 1. metal bond diamond grinding wheel, 2. WC-Co, and 3. copper.

Download or read book Performance Properties of Superhard Grinding Wheels in Erosive Dressing Processes written by Marcin Gołąbczak and published by Springer Nature. This book was released on with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Special Wire Guide for On machine Wire Electrical Discharge Dressing of Metal Bonded Grinding Wheels written by Eduardo Weingärtner and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tribology and Fundamentals of Abrasive Machining Processes written by Bahman Azarhoushang and published by William Andrew. This book was released on 2021-11-10 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition draws upon the fundamentals of abrasive machining processes and the science of tribology to understand, predict, and improve abrasive machining processes. Each of the main elements of the abrasive machining system is looked at alongside the tribological factors that control the efficiency and quality of the processes described. The new edition has been updated to include a variety of industrial applications. Grinding and conditioning of grinding tools are dealt with in particular detail, and solutions are proposed for many of the most commonly experienced industrial problems, such as poor accuracy, poor surface quality, rapid tool wear, vibrations, workpiece burn, and high process costs. The entire book has been rewritten and restructured, with ten completely new chapters. Other new features include: - Extensive explanations of the main abrasive machining processes such as grinding (including reciprocating and creep-feed grinding, high-speed high-efficiency deep grinding, external and internal cylindrical grinding, and centerless grinding), honing, superfinishing, lapping, polishing, and finishing - Discussions of the new classes of abrasives, abrasive tools, and bonding materials - New case studies and troubleshooting on the most common grinding practices - New coverage on grinding tool conditioning, mechanical dressing, and nonmechanical dressing processes - Detailed explanations of the effects of process input parameters (such as cutting parameters, workpiece material and geometry, and abrasive tools) on process characteristics, workpiece quality, tool wear, and process parameters (such as cutting forces and temperature as well as achievable material removal rate) - Updated topics regarding process fluids for abrasive machining and fluid delivery

Download or read book Advanced Machining Processes written by Prof. Vijay Kumar Jain and published by Allied Publishers. This book was released on 2009 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electrical Discharge Dressing and Its Influence on Metal Bonded Diamond Wheels written by Eduardo Weingärtner and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Use of In process EDM Truing to Generate Complex Contours on Metal bond Superabrasive Grinding Wheels for Precision Grinding Structural Ceramics written by and published by . This book was released on 1997 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents recent work performed at Lawrence Livermore National Laboratory to develop cost-effective, versatile and robust manufacturing methods for grinding precision features in structural ceramics using metal-bond, superabrasive grinding wheels. The developed processes include utilizing specialized, on-machine hardware to generate precision profiles onto grinding wheels using electrical-discharge machining (EDM) and a contoured rotating electrode. The production grinding processes are described, which were developed and used to grind various precision details into a host of structural ceramics such as Al2O3, Si3N4, and BeO. The methodologies, hardware and results of both creep-feed and cylindrical grinding are described. A discussion of imparted grinding damage and wheel wear is also presented.

Download or read book In process Electrochemical Discharge Dressing of Metal bonded Diamond Grinding Wheels written by Andi Sudiarso and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tribology of Abrasive Machining Processes written by Ioan D. Marinescu and published by William Andrew. This book was released on 2012-12-07 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book draws upon the science of tribology to understand, predict and improve abrasive machining processes. Pulling together information on how abrasives work, the authors, who are renowned experts in abrasive technology, demonstrate how tribology can be applied as a tool to improve abrasive machining processes. Each of the main elements of the abrasive machining system are looked at, and the tribological factors that control the efficiency and quality of the processes are described. Since grinding is by far the most commonly employed abrasive machining process, it is dealt with in particular detail. Solutions are posed to many of the most commonly experienced industrial problems, such as poor accuracy, poor surface quality, rapid wheel wear, vibrations, work-piece burn and high process costs. This practical approach makes this book an essential tool for practicing engineers. Uses the science of tribology to improve understanding and of abrasive machining processes in order to increase performance, productivity and surface quality of final products A comprehensive reference on how abrasives work, covering kinematics, heat transfer, thermal stresses, molecular dynamics, fluids and the tribology of lubricants Authoritative and ground-breaking in its first edition, the 2nd edition includes 30% new and updated material, including new topics such as CMP (Chemical Mechanical Polishing) and precision machining for micro-and nano-scale applications

Download or read book Advances in Grinding and Abrasive Technology XIII written by Guang Qi Cai and published by Trans Tech Publications Ltd. This book was released on 2006-02-15 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume is indexed by Thomson Reuters CPCI-S (WoS). This work is the result of a careful selection made from more than 300 extensively peer-reviewed papers treating recent advances in the field of abrasive technology.

Download or read book Proceedings of the ASME Manufacturing Engineering Division written by and published by . This book was released on 2003 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fabrication of Complex Optical Components written by Ekkard Brinksmeier and published by Springer Science & Business Media. This book was released on 2012-09-13 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: High quality optical components for consumer products made of glass and plastic are mostly fabricated by replication. This highly developed production technology requires several consecutive, well-matched processing steps called a "process chain" covering all steps from mold design, advanced machining and coating of molds, up to the actual replication and final precision measurement of the quality of the optical components. Current market demands for leading edge optical applications require high precision and cost effective parts in large volumes. For meeting these demands it is necessary to develop high quality process chains and moreover, to crosslink all demands and interdependencies within these process chains. The Transregional Collaborative Research Center "Process chains for the replication of complex optical elements" at Bremen, Aachen and Stillwater worked extensively and thoroughly in this field from 2001 to 2012. This volume will present the latest scientific results for the complete process chain giving a profound insight into present-day high-tech production.

Download or read book FUNDAMENTALS OF MODERN MANUFACTURING written by Mikell P. Groover and published by JOHN WILEY & SONS, INC.. This book was released on 2002 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt: