November/December 2016
Archive > 2016 > November/December 2016

Download the November/December 2016 Issue in PDF format
Feature Articles
2016 Buyers Guide
Your guide to the suppliers of machinery, tooling and services you need for gear manufacturing.
Gear Shop of Tomorrow
It's Monday morning, December
15, 2036. An autonomous vehicle
drops off two engineers in front of a gear manufacturing facility in Metro Detroit. They punch in for work on their wristwatches and pay Uber for the ride on a smartphone. One of the engineers begins walking the shop floor, monitoring a series of collaborative robots using a tablet
the size of a paperback novel. These
robots interact right on the floor with
the minimal staff scheduled to oversee
manufacturing operations. Another
engineer wears an interactive headset
and begins training a group of new engineers (in real time) from China using some form of augmented reality.
DIGITIZE or DIE
In a capitalist society, the way things usually work is that government
and academia focus on research and
development, while industry focuses
on commercialization. The result
is an increasingly wide disconnect in
the applied research sector, which deals
primarily with technology development
and demonstration.
Technical Articles
The Role of Natural Frequencies in Grinding Systems Vibration
Excessive machine tool vibration during a precision grinding operation can result in poor workpiece quality in the form of chatter, rough finishes, burn, etc. One possible reason for
excessive vibration is directly associated with the relationship
between natural frequencies of a machine tool system and the
operating speed of the grinding wheel spindle.
Calculation of the Tooth Root Strength of Worm Wheel Teeth Based on Local Stresses
How local stresses obtained from FEA can be used to determine fatigue strength of worm wheel teeth.
Influence of Topography Deviations on the Psychoacoustic Evaluation of Ground Bevel Gears
In the design process of transmissions, one major criterion is the
resulting noise emission of the powertrain due to gear excitation.
Within the past years, much investigation has shown that the
noise emission can be attributed to quasi-static transmission error.
Therefore, the transmission error can be used for a tooth contact
analysis in the design process, as well as a characteristic value for
quality assurance by experimental inspections.
Optimal Flank Forms for Large Bevel Gears
At first sight the appearance of 5-axis milling for bevel gears opens new possibilities in flank form
design. Since in comparison to existing machining methods applying cutter heads no kinematic
restrictions exist for 5-axis milling technology, any flank form can be machined.
Nevertheless the basic requirements for bevel gears did not change. Specifications and functional
requirements like load carrying capacity and running behavior are still increasing demands for design
and manufacturing. This paper describes the demands for gear design and gives an overview about
different design principles in the context of the surrounding periphery of the gear set.
Departments
Our Next Leader (Publishers Page)
No, not that president! I mean Matt Croson, the new president
of the American Gear Manufacturers Association, who
started in June and has been busy getting to know the gear
industry and AGMA's members.
AGMA Standards Committees Keep Industry in Business (Voices)
More than 100 years ago, gear
manufacturers were facing
a significant challenge from
industry. The incredible advances in
industrialization and transportation that
occurred at the turn of the 20th century
resulted in incredible growth for gear
makers, but there were significant technical
issues. "The lack of process and product
standardization was a continuing
problem in all U.S. industry. The lack
of industry-wide gear standards meant
there were no standard gear tooth sizes,
ratings, quality definition or consistent
manufacturing methods" (Celebrating
100 Years of Gearing, pg. 22).
Product News (Product News)
News about new Products in the Industry
Locating Multiple Bore Diameters Via Hobbing (Ask the Expert)
Attached photos (Figs. 1-2) show a
bushing to locate one single bore. This
will be used to locate one single bore
diameter of a gear wheel. What is (the
latest) technology for common clamping a
bushing to locate multiple bore diameters
in hobbing?
Calendar (Events)
Calendar of events
Industry News (Industry News)
News from around the Industry
Building Gears, Building Communities (Addendum)
Outside of our industry, there's a whole slew of hobbyists working with gears to make clocks, art pieces, watches and all manner of bizarrely shaped gears (you know, all the people that usually end
up featured right here in our Addendum section).