July 2009
Download the July 2009 Issue in PDF format
Features
An International Wind Turbine Gearbox Standard
Industrial gear standards have been used to support reliability through the specification of requirements for
design, manufacturing and verification.
The consensus development of an
international wind turbine gearbox
standard is an example where gear
products can be used in reliable
mechanical systems today. This has
been achieved through progressive
changes in gear technology, gear
design methods and the continual
development and refinement of gearbox
standards.
Practical Magic - Metrology Products Keep Pace with Machine Technology
Gear metrology is a revolving door of software packages and system upgrades. It has to be in order to keep up with the productivity and development
processes of the machines on the
manufacturing floor. Temperature
compensation, faster inspection times
and improved software packages are
just a few of the advancements currently in play as companies prepare for new opportunities in areas like alternative energy, automotive and aerospace/defense.
Technical Articles
The Effect of Manufaturing Microgeometry Variations on the Load Distribution Factor and on Gear Contact and Root Stresses
Traditionally, gear rating procedures consider manufacturing accuracy in the application of the dynamic factor, but
only indirectly through the load distribution are such errors in the calculation of stresses used in the durability and gear strength equations. This paper discusses how accuracy affects the calculation of stresses and then uses both statistical
design of experiments and Monte Carlo simulation techniques to quantify the effects of different manufacturing and
assembly errors on root and contact stresses.
Extending the Benefits of Elemental Gear Inspection
It may not be widely recognized that most of the inspection data supplied by inspection equipment, following the
practices of AGMA Standard 2015 and similar standards, are not of elemental accuracy deviations but of some form of composite deviations. This paper demonstrates the validity of this “composite” label by first defining the nature of a true
elemental deviation and then, by referring to earlier literature, demonstrating how the common inspection practices for involute, lead (on helical gears), pitch, and, in some cases, total accumulated pitch, constitute composite measurements.
Departments
Crossroads and Transitions - Part II (Publishers Page)
The auction has been held. The warehouse is bare. The computers
and furniture are being packed, and Cadillac Machinery, the company
started by my father in 1950, and of which I was president for more
than 25 years, is close to being no more.
Optimization through Customization (Voices)
Many engineers and purchasing agents think it is more expensive to custom design a component or assembly these
days when often customization can save on total costs.
Gear Milling on Non-Gear Dedicated Machinery (Product News)
Imagine the flexibility of having one
machine capable of milling, turning,
tapping and gear cutting with deburring
included for hard and soft material. No, you’re not in gear fantasy land. The technology to manufacture gears on non gear-dedicated, mult-axis machines has existed for a few years in Europe, but has not yet ventured into mainstream manufacturing. Deckel Maho Pfronten, a member of the Gildemeister Group, took the sales plunge this year, making the technology available on most of its 2009 machines.
Product News (Product News)
The complete Product News section from the July 2009 issue of Gear Technology.
Calendar (Events)
The technical calendar of upcoming events from the July 2009 issue of Gear Technology.
Sigma Pool Encourages Collaboration at 2009 U.S. Gear Seminar (Events)
In the past, the coffee breaks and
dinner events at Sigma Pool’s gear
seminars have often triggered future
process development and product
improvements. This was still the case
during the 2009 installment where
customers and suppliers talked shop
inside and outside the banquet hall on the new market and technology challenges currently facing the gear industry.
ASM Bringing the Heat to Gear Expo (Events)
Gear making and heat treating pair
together like a fine cabernet and filet
mignon. Now for the first time, the two
industries are embracing this symbiotic
relationship by co-locating their industry events this fall in Indianapolis. ASM International’s 2009 Heat Treating Society Conference and Exposition and Gear Technology’s favorite trade show, Gear Expo, are teaming up September 14–17 at the Indiana Convention Center in Indianapolis.
Industry News (Industry News)
The complete industry news section from the July 2009 issue of Gear Technology.
You Want It When (Addendum)
What do glam and avant garde rock star Brian Eno, AGMA and Seattle Gear Works have in common? Admittedly, not much. But there is a connection of sorts.