HANDBOOK OFADVANCED CERAMICS MACHINING I docx

[...]... machine tool to achieve ductile grinding of ceramics is accurate positioning capability and high repeatability to constantly control the grinding condition within sp s < sf and d dc (Figure 1.1) 1.5.2 Key Technologies of a Ductile Microgrinding Machine Tool As described in several publications,17 the ultraprecision machine tool must have a structure of high thermal rigidity (or low thermal expansion),... University, Kumamoto, Japan Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C000 Final Proof page xiii 18.10.2006 6:35pm Contents 1 Ductile Grinding of Ceramics: Machine Tool and Process 1 H Eda 2 Ductile-Mode Ultra-Smoothness Grinding of Fine Ceramics with Coarse-Grain-Size Diamond Wheels 29 H Yasui 3 Mechanisms for Grinding of Ceramics 55 S Malkin and T.W Hwang 4 Grinding... Laufer Institute for Machine Tools and Factory Management, Technical University of Berlin, Germany A Makinouchi Materials Fabrication Laboratory, RIKEN, Saitamaken, Japan Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C000 Final Proof page xii 18.10.2006 6:35pm S Malkin Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst I. D Marinescu Precision Micro Machining. .. digit better than conventional machine tools However, the dynamic rigidity is less important and still acceptable even if it is one digit lower For example, the compliances of Cr ¼ 0.1 mm=kgf in radius direction, Ca ¼ 0.03 mm=kgf in axial direction, and Cc ¼ 0.1 mrad=kg m in rotational direction are sufficient for the main spindle whereas the error motions of 50 nm in both radius and axial directions... Superabrasives of Engis Co., Wheeling, Illinois R Coman Precision Micro Machining Center, College of Engineering, University of Toledo, Ohio N.-A Daus Institute for Machine Tools and Factory Management, Technical University of Berlin, Germany G Dontu Diamond Abrasive Company, New York, New York H Eda Saint Gobain Abrasives Company, Romulus, Michigan M Hitchiner Saint Gobain Abrasives Company, Romulus, Michigan... line in (a) (b) Undeformed chip thickness 0.5 µm Undeformed chip thickness 1 µm FIGURE 1.5 Result of simulation obtained by taking into account the effect of atmospheric gas Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof page 8 6.10.2006 2:05am Handbook of Advanced Ceramics Machining 8 Tension Compression FIGURE 1.6 Stress distribution in the workspace during cutting... standard deviation of 0.5 kgf=mm in the normal direction (perpendicular to the grinding direction) and the dynamic rigidity kvd % 10 kgf= mm with a standard deviation of 2 kgf=mm These values indicate that the rigidity is one digit smaller than that of conventional machine tools Futhermore, the tangential dynamic rigidity is about kdt % 10 kgf=mm (standard deviation 0.2 kgf=mm) and kw % 2 kgf=mm is quite standard... nm, in which no brittle behavior is 1.10 1.00 0.90 FIGURE 1.4 Cluster density distribution taken as a snapshot during cutting (normalized by the bulk value) Undeformed chip thickness is 1 mm Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof Ductile Grinding of Ceramics: Machine Tool and Process page 7 6.10.2006 2:05am 7 observed The density distribution of the silicon atom... mode to the perfect ductile mode, the specific energy for brittle grinding mf should agree with the condition sp < s < sf shown in Figure 1.1, and the specific energy for ductile grinding mp should take a value equivalent to hardness H If the grinding speed is as Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof Ductile Grinding of Ceramics: Machine Tool and Process page... SK7 d −4/3 (nm−4/3) FIGURE 1.16 Specific grinding energy vs dÀ4=3 1.5 1.5.1 Machine Tools for Ductile Grinding of Ceramics Design Criteria of Ductile Microgrinding Machine Tool Generally, microgrinding is referred to as the material removal rate (MRR) ranging from 0.1 to 0.0001 mm3=mm sec, which includes the process Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof page 19 . for identification and explanation without intent to infringe. Library of Congress Cataloging-in-Publication Data Handbook of advanced ceramics machining / edited by Ioan D. Marinescu. p. cm. Includes. that this is a promising technology, which may allow grinding of ceramics with high productivity and high accuracy at the same time. Ioan D. Marinescu /Handbook of Advanced Ceramics Machining 3837_C000. method that is new and not very familiar to the industry: belt centerless grinding of ceramics materials using special diamond belts. This method is used mainly for high-efficiency grinding applications