ABRASIVE USER'S NEW FAX

Now in its sixteenth year, News Fax is a subscription service providing information on current events, research, publications, resources or news related to abrasives and their application to metalworking and machining of ceramics. Contact Abrasives User's News Fax for subscription information and sample issues.


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SAMPLES NEWS ITEMS

Excerpted from various issues over the last several years

NEW BOOKS

___Handbook of Machining with Grinding Wheels$135 plus shipping from the Abrasives Mall. --the first significant book on applications of grinding wheels in more than a decade. It’s not a rehash of older sources but an entirely new work by an international group of experts who cite references written in the last decade. The authors are all recognized experts, many with awards from such renowned organizations as CIRP. With three of its five authors residing outside the US, the book is a clear indicator that abrasives technology is becoming an imported resource. The emphasis of this book is upon grinding wheels, production grinding, and “ why things happen as they do, rather than a how-to-do-it approach.”(Preface) The many details in application examples give a refreshing insight into the most important issues faced by end users.Though there is slight emphasis upon superabrasives, the book is not a promotion for any one type of abrasive. A section on grinding titanium, for example, illustrates the importance of chemical reactivity between abrasive and work material and why SiC continues to be the abrasive of choice in many applications, Contact News Fax for more information.
___Hand Deburring:Increasing Shop Productivity--$125 plus shipping (subject to change) ---a unique book of data compiled in 37 years of experiences by La Roux Gillespie.What's right about hand deburring, common practices, tools, equipment, inspection equipment, management issues, and more in a 468-page book filled with photos and illustrations. Hand deburring out numbers all other processes for removing burrs by a factor of 20 to 1. Details include selection and use of metal tools and abrasives, troubleshooting and ways to improve existing deburring operations.
___Surfaces and Their Measure Materials--An updated and less expensive book that gives an inside look at the complicated world of surface metrology. Does it need to be so complex? No, says Whitehouse in his very readable textbook that nonetheless is a technical masterpiece. See the book commentary on this website
___Precision Machining of Advanced Materials--Edited by L. Zhang, Trans Tech Publications, $79.50--- The latest in a series of compilations edited by Dr. Zhang, professor of Mechanical Engineering at the University of Sydney. As volume 196 of the Key Engineering Materials series published by TransTech Publications, this 202-pagebook reflects the state-of-the-art of machining of advanced materials in China. The book contains over 100 technical paper organized in major classes that include:• Mechanism — CMP, Grinding Burn, and Grinding of Ceramics; • Friction and Wear —ELID and Diamond Tools; and• Methods — Wheel Topography, Abrasive Jet, Diamond Tools,
Contact the Abrasives Mall for full issue in Vol. 5 - Extra No. 1

TRAINING/EVENTS CALENDAR

___Metalworking Fluids Management Certificate Program of SME, November 13-15, at the Mazak National Technology Center, Florence, KY, Brochures for this and future events at www.sme.org. Instructors include John Burke, Houghton International Fluidcare Division. Neil Canter, Chemical Solutions, and Frederick Passman, PhD.
___Grinding Principles and Practices seminars: Next dates May 8-10, 2007. Also Centerless Grinding Principles, March 20-22, 2007. See machining courses at www.techsolve.org
___The Practical Applications Research Consortium and seminar is sponsored by WPI Surface Metrology Lab and CAAP. Title of the Applied Grinding Research Seminar: Troubleshooting and Solutions for Production Environments. For information call Jim Camp at 508-754-2739 or email to smilkman@wpi.edu

INDUSTRY NEWS

___The price of abrasive products from China is going up. In January 2007, the Chinese government agencies applied a 10% export customs duty on fused aluminum oxide to divert more alumina production to China’s domestic use. Despite a 22% increase in alumina production in 2006, China imported 7 million tons to meet domestic demand according to China’s National Bureau of Statistics. Also, prices will increase because of changing exchange rates. The exchange rate of the Renminbi (RMB), Chinese Yuan currency, is expected to appreciate in 2007 by 5% to 7.44 Yuan to one US dollar, according to a Xinhua Economic Analysis Report. The report is based upon reviews of the China’s key economic and financial sectors by a team of 80 economic analysts. The declining value of US dollar saw an accelerating rate of change in 2006 beginning at 0.66 percent in early 2006 and ending at 1.15 percent. The Xinhua report says new rates, which make Chinese exports more expensive to foreign buyers, will cause small export-driven companies in China to lay off employees or close.
__Abracol, S. A., manufacturer of coated and bonded abrasives for the South & Central American, Mexican, and Caribbean markets is finishing construction on a new facility that will boost coated abrasives capacity by 150% and produce 54" jumbo rolls.  Also Abracol recently upgraded and expanded resin and vitrified bond production with state-of-the-art machinery and technology. With these additions and a recent free-trade agreement between Colombia and the United States, Abracol is poised to increase marketing presence in the U. S. A.  Contact Donald Barrett at 512 280 4687or email: abraexp@abracol.com.co.
___The honing industry is in a state of flux. Changes reported in past issues of News Fax included the Darmann Abrasive Products acquisition of Phoenix Metallurgy, and Bates Technologies reestablishing its name with the acquisition of Micromatic Textron product lines. Recently two new companies have entered the business, both operated by people with considerable experience in honing stones, tools and related equipment: Ohio Tool Works Inc, Ashland OH and Advanced Honing Supplies, St. Paul, MN 55110. Industry changes may be driven by the boom in the oil and gas industry and greater demand for pumps and hydraulic assemblies. www.ohiotoolworks.com and www.honingsupplies.com
___In a momentous change for the US abrasive industry, Unova has sold Landis Grinding Systems to Groupe Fives-Lille, an engineering group based in France. The price was $80 million plus other considerations including medical and pension obligations. Pending approval by European regulatory agencies, Landis will become part of the Cinetic group, which serves automotive and manufacturing industries. With the sale of the Cincinnati Lamb Group to MAG Industrial Automation earlier this year, Unova has disposed of its industrial automation businesses and will now concentrate on its identification and bar coding business, which press releases say is thriving. In an open letter to clients, Landis CEO Daniel Pheill wrote “Although the ownership of Landis Grinding Systems will change, our people, our operations, our famous brands and our commitment to customer service will remain the same.” The change is momentous because it includes several well known companies under the Landis Grinding Systems umbrella including Landis, manufacture of center type grinding systems; Landis Gardner, maker of precision single and double disc grinders; Landis Cincinnati, maker of the Cincinnati centerless grinders; Gardner Abrasives, manufacturer of grinding wheels and other abrasive products; Citco , manufacturer of superabrasive grinding wheels, dressing tools, and other products; and Cranfield Precision , a precision machine tool maker and research firm in the UK. Although executives offered no comment on prospects for those companies, there is an air of uncertainty about their future under the new French ownership. Press release and other details available.
___Service Network Inc, Worcester, MA, has expanded its manufacturing facilities by 50% to meet worldwide demand for their ID and OD grinders, retrofit packages for Heald machines and new products. The new space includes dedicated assembly lines for SNI’s newest production grinders, the SN600-I and SN600-E. Temporary offices for engineering and management have been set-up awaiting completion of facilities. Production and construction was interrupted by a major flood that sweep through area October 15th, but Vice President Brad Klar reports that with efforts of employees, government agencies and othersproduction is now back at 100%.
___Bryant Grinder Corp has been purchased by Vermont Machine Tool following negotiations with BF Associates who out bid others in recent bankruptcy proceedings. Contact the Mall for details.
__Cone Blanchard and Motch are notclosing after announcements are posted on respective website by DeVieg Bullard.
___Saint-Gobain Abrasives, Inc. announced that it has acquired Merit Abrasives, a manufacturer of specialty coated abrasive products (e.g., quick-change discs, flap discs,flap wheels and contour sanding heads). Merit Abrasives employs about 180 people worldwide with plants in Compton, CA (headquarters); Brookville, OH; Glasgow, Scotland; and Tijuana, Mexico. The Compton operations are being transferred to Ohio and Mexico. Saint-Gobain had supplied jumbo rolls of coated abrasives to Merit, which used them to manufacture products for Saint Gobain. Merit’s management would remain with the company. www.meritabrasives.com.


RESEARCH

---Grinding of ceramics is part of programs at North Carolina State University’s Precision Engineering Center founded in 1982. Eight industrial affiliates (eg. 3M and Rank Taylor Hobson) offer resources and research projects for the Center. Noteable work: computer modeling for contour grinding and studies in virtual reality that yielded a virtual simulation grinding.


---Thomas Dow, director of the Center, is founder of the American Society for Precision Engineering. Technical papers and presentions reflect his research on diamond turning, precision grinding and control of fracture in ceramics, and cup wheel geometry. Ronald Scattergood also works at the Center researching wear and fracture processes of ceramics. His efforts concentrate on precision grinding of ceramics, electrolytic in process dressing, and process modeling. For technical papers, reports, and Center information see their website at http://www.mae.ncsu.edu/Centers/PEC. or call News Fax. PEC:(919) 515-3096

___Notable among research programs in grinding technology is the work at Purdue University, West Lafayette, IN, under the leadership of Professors S. Chandrasekar, W.D. Compton and Thomas N. Farris. Much of the current research is done by the University’s Materials Processing and Tribology Research Group, a cross-disciplinary organization that combines staff, facility and student resources from the School of Industrial Engineering and the School of Aeronautics and Astronautics. Many of past students in PhD and Masters degree programs for grinding technology now hold prominent positions in the manufacturing industry and government agencies. Past research topics have covered surface damage in ceramics, heat in grinding, free abrasive machining, lapping and polishing, centerless grinding and high speed surface grinding of steels and ceramics; modeling for grinding forces, form generation, burn and residual stress; and evaluation of grinding wheel wear. Among the currently active programs are studies of forces and material removal mechanisms in lapping, polishing and superfinishing; surface finishing process for thermally sprayed coatings and related grinding damage; and unlubricated finish machining of hardened steels with CBN tools. Contacts: chandy@ecn,purdue.edu or (765) 494-3623.

TECH NOTES

GRINDING CHEMISTRY --- While much of the research on grinding focuses on physical and mechanical characteristics of grinding, chemistry of interactions among abrasive, workpiece and grinding fluid may play an increasingly important role in understanding and controlling grinding processes. That’s what engineers at Benz Oil, Milwaukee, WI believe from various studies they have conducted. A recent study at Benz Oil comparing the use of straight oil and water-based coolants with CBN points to the chemical reaction between CBN and water as the reason why wheels last up to forty times longer with oil-based coolants. Based upon a long-understood reaction that yields ammonia and boric acid, the chemical process produces18.6 kcals/mole of Gibbs Free Energy in a favorable chemical reaction. Reaction rates increase by orders of magnitude with increases in temperature, and though insignificant at room temperatures, deterioration of CBN in the grinding zone, where temperatures can reach over 800°C, becomes significant. .. Contact News fax for full article from Vol 4 no. 20.

FROM THE LITERATURE

___The introduction of new pre-alloyed sintered bonds and metal powders will likely increase the number of options for end users of superabrasive tools. Developments in powder binders comes on the heals of advances in particle sizing technology and a growing need to find alternatives to cobalt, which has had wildly fluctuating prices over the last decade. Manufacturers such as Union Miniere, Belgium, have pursued other bonding agents to reduce dependence on cobalt as well as develop formulations better suited for tailoring tools to specific needs. They have found alloys containing 70% iron and 10% cobalt, for example, that yield 8% lighter and significantly cheaper tools. Illustrating the trend, Dr. Frisch Metal Powders, Fallbach, Germany now offers a line on powders containing proprietary blends of metals under the Diabase tradename. Details in articles from Finer Points and IDR magazines.

See also other notes on News Shorts


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rev 2/1/2012