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 In this issue of the Mechanical
Monthly Newsletter there are articles on a new internal-combustion
engine, how to care for cables, and on mechanical brakes.
The products highlighted in this issue are metric gears and three-port
valves.
Be sure to check out the industry update to find out about the Power
Transmission Distributors
Association (PTDA) Industry Summit in October.
Thanks for reading and have a great day!
-- Julie Kalista
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Researchers use model to redesign
internal-combustion engine
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Researchers at Purdue University have built the first model that tracks
engine performance from one combustion cycle to the next. One of its
first tasks will be analyzing an engine design that eliminates the
mechanism linking the crankshaft and camshaft, and controls the valves
independently. The valves would, therefore, be more finely tuned for
efficiently burning diesel, gasoline, and alternative fuels, since
piston movement would not restrict timing. The concept, known as
variable-valve actuation, could also handle homogeneous
chargecompression ignition (HCCI).
Full Article
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Machine tools, coordinate-measuring machines, palletizers, robots,
ship-to-shore cranes, and laboratory medical equipment are just some of
the applications for cable carriers. Cable carriers keep cables and
hoses on translating and rotating axis from tangling and exceeding
minimum bend radii. Carriers also help expel debris and prevent cable
and hose jackets from touching the machine itself. A cable carrier
consists of hinged plastic or metal links that articulate as a machine
axis moves. The most common carrier arrangement is horizontal and
unsupported. This configuration works well for short travel distances
and gives the longest possible service life.
Full Article
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Components for Drivelines: Mechanical
brakes
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Brakes absorb energy and convert it to heat. Thus, prime concerns in
a brake are: 1. Generating a force capable of retarding a rotating
shaft. 2. Dissipating or absorbing the heat generated in the process.
Mechanical brakes all act by generating frictional forces as two
surfaces rub against each other.
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More than 3,700 metric gears and related products are detailed in a
528-page catalog. The "Elements of Gear Technology" reference section
covers the principles of involute gearing, gear dimension calculations,
definition of back lash, plastic gear design, elements of gear accuracy,
principles of surface contact, methods of lubrication, and
noise-reduction methods. Product sections give detailed specifications
of available products. The products come in sizes from module 0.5
through module 10 in alloy steel, carbon steel, stainless steel, cast
iron, aluminum bronze, brass, cast bronze, nylon, and acetal.
More Information:
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The Series VV061-Cube manifold comes in 6-mm widths with three port
valves that can be used to operate small bore cylinders or as a pilot
valve to operate air operated valves. It combines valve, PCB, base, and
fittings as one unit for space saving. Valves have two voltage options:
24 or 12 Vdc. The 6-mm-width valve Series uses 0.55 W in standard
configuration and 0.23 W with power-saving circuit and has a response
time of 10 msec. The Cube manifold is available in four and eight
station configurations and comes with two types of pipe connections:
barb fitting to accept 4-mm OD tubing or 2-mm one-touch fitting. Valves
are available with two optional seal material FKM and HNBR and the whole
manifold complies with RoHS, CE, UL, and CSA standards. The standard
valve has a Cv of 0.004 (0 to 100 psi) and 0.008 in the low-pressure
version suitable from vacuum to 44 psi pressure. The Cube manifold is
available with 300, 600, or 1,000-mm connector-cables.
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Introducing Engineering TV, an innovative online video program
by engineers for engineers. Twice a week, each 5-8 minute episode shows
cutting-edge technology in
action and looks behind the scenes as today's engineers shape tomorrow's
breakthroughs. Brought to you by the Penton Media Design and Electronics
Engineering groups.
View
Videos
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Experience National Instruments
Technologies From the Comfort of Your Own Computer!
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With more than 200 on-demand webcasts, videos, interactive turorials
and demos available for users of any experience level, it is easier than
ever to learn about the newest products and features available from
National Instruments.
Begin your search here with a collection of webcasts specifically chosen
for design and automation engineers.
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ARCHIVED WEBCASTS AVAILABLE FOR FREE
VIEWING
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Click Here for a list of archived Machine Design webcasts.
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Sponsored
by:
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Search for products and manufacturers
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October 18-20, 2007
The PTDA Industry Summit will focus on leadership and talent management
skills, developing value selling techniques, and strengthening business
relationships. It combines targeted educational
programming, networking with corporate decision-makers, and a blend of
social events. There is a version for distributors and for
manufacturers.
More Information:
PDTA
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ServoClass Couplings meet the precision positioning requirements of
AC and DC servomotor applications. Featuring zero backlash, flexible
metal disks in both
single and double disk designs. Ideal for up to 10,000 RPM applications
and torque capability up to 885 lb-in. They also provide high torsional
stiffness, low
inertia, clamp-type hubs, bore sizes from 4mm to 35mm.
More info at: www.zero-max.com
Free online sizing and selection software or request FREE CD at: www.sizingcd.com
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Big 6 Dos and Don'ts Booklet from
UFE
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UFE's FREE Parts SmartsTM booklet "The Big 6 Design Dos and Don'ts"
addresses fundamental considerations for engineers who design, specify,
or purchase injection molded parts. Download your copy today!
Big6PR.ufeinc.com
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Contact Information
Editorial questions: Julie Kalista
216-931-9458
Advertising/sponsorship opportunities: Rick Seibt 216-931-9652
Machine Design
1300 E. 9th St.
Cleveland, OH 44114
©2007 Penton Media, Inc. All rights reserved.
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