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Stopping the flow of counterfeit
components
In the 1980s, defective fasteners on Army tanks, Navy ships, and
interstate highway bridges caught the attention of Congress. A study of
the U.S. fastener industry by the House Subcommittee on Oversight and
Investigations documented inadequate standards and quality control. It
also found that imported, low-grade parts were being passed off as
high-strength fasteners. The end result was the 1990 Fastener Quality
Act (FQA), which set guidelines for inspecting and labeling fasteners
and accrediting test facilities.
Today, counterfeit fasteners are a negligible problem in the U.S. When
issues have come up since, fastener industry leaders gather quickly to
confer, develop logical solutions, and then widely broadcast the
suggestions. And they keep appropriate government representatives in the
loop to clearly show the industry is regulating itself. Any industry
facing quality issues (counterfeiting being one aspect) should follow
the fastener industry’s lead.
Read thefull article.
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Understanding the nut factor
Measuring torque when installing threaded fasteners is the best
indicator of future joint performance, right? Actually, bolt tension is
a better performance indicator, but measuring torque is far easier to
do.
Bolt tension is created when a bolt elongates during tightening,
producing the clamp load that prevents movement between joint members.
Such movement is arguably the most common cause of structural joint
failures. The relationship between applied torque and the tension
created is described by the relationship:
T = K × D × F
where T = torque, K = nut factor, sometimes called the friction factor,
D = bolt diameter, and F = bolt tension generated during tightening.
Read the full article.
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Getting a grip with suction cups
Companies in the highly automated metal-fabricating industries are
going through tough times, making efficient production and fast assembly
lines crucial. And plants that can’t keep up will quickly
disappear.
Metal fabrication often involves station-to-station handling of
slippery, oily metal sheets or blanks. Suction cups are the most common
tools used to handle and move such sheets. But as production speeds
accelerate, suction cups must also become more capable of handling these
speeds and loads. Fortunately, friction cups, suction cups with
specialized surfaces, gives companies a viable way to handle today’s
and tomorrow’s higher speeds and feeds.
Read the full article.
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Hydraulic flange seals
A new series of hydraulic flange seals, manufactured from high-grade
polyurethane, are for aggressive and heavy-duty applications. The
material provides added resistance to extrusion and compression set over
–40 to 230°F and a pressure rating of up to 6,000 psi.
Unlike common O-rings, the seals are specifically designed to fit SAE
standard location groove on the underside of a flange. The seals
custom-manufactured rectangular cross section is formed and sized to
accurately locate within the flange machined housing. The seals are
available in six standard sizes to fit flanges from ½ to 2 in.
Pirtek USA
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Hygienic sealing materials
Ethylene propylene diene monomer (EPDM) E7502, fluorocarbon (FKM)
V8605, and FKM V8T41 sealing materials are for hygienic-design
couplings. They have less than 10% volume swell in 21 common
cleaning-in-process (CIP) media.
EPDM E7502 has high chemical resistance to polar solvents, steam, hot
water, and alkaline cleaning fluids. FKM V8605 withstands high
temperatures and contact with high-fat media such as edible oils or
cosmetics. FKM V8T41 has hot-water and steam resistance up to 338°F. It
also gives high performance in contact with dry and liquid products in
the meat, poultry, dairy, pharmaceutical, and bioprocessing
industries.
All three materials comply with FDA, 21 CFR177.2600, 3-A, USP Class VI,
USP and DIN EN ISO 10993-5, and EC 1935/2004. Gaskets and O-Rings come
in ISO 2852, DIN 11864, DIN 32676, and custom sizes.
Trelleborg Sealing Solutions
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Thermal-management epoxy
EP30BN two-part, boron-nitride epoxy adhesive helps with thermal
management for aerospace, defense, and microelectronic assemblies. The
epoxy's medium viscosity lets it flow in bonding, sealing, and potting
applications.
It has a specific gravity of 1.1 and cures at room temperature or
elevated temperatures. The epoxy works between -60 and 300°F. Its
volume resistivity is over 1014 ohm-cm, and it has a thermal
conductivity of 24 BTU/hr/ft2/°F/in.
Master Bond
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Check Out the New EET Website
Are you looking for more information on energy efficiency? EETweb.com
features the latest efficiency updates, information on the basics of
energy efficiency and products available for energy efficient designs.
Click here to
visit the site and learn more!
Machine Design Video Spotlight
 |
Learn more about Proto
Labs |
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See how Proto Labs, through its First
Cut and Protomold services, provides new product designers and engineers
with the easiest, fastest and least-expensive way to obtain real parts,
really fast. |
Now Available On-Demand
The Energy Efficiency Web Conference & Expo
Engineers saw and heard great educational content at the Energy
Efficiency Web Conference and Expo. If you missed the live virtual
event, don’t despair! An archive of the full day’s agenda is now
available.
Design engineers are required to integrate energy efficiency into their
designs while maintaining lower costs, the highest reliability or both.
The editors of Machine Design understand these challenges
and have developed this conference to help engineers understand the
recently imposed energy mandates. The information presented at this
educational event will help engineers compare the different technologies
and product related to energy efficiency. Attendees will gain access to
the technical information needed to help them make the best decisions
without having to travel or take time away from current projects.
Visit the archive to:
- View informative webinars on energy efficiency
- Visit interactive booths where you can contact suppliers
- Peruse the Resource Center where you can download or link to
additional pertinent energy efficiency information
Register Now!
UPCOMING WEBCASTS
Optimizing Mechatronic Systems Using Simulation
Sponsored by The MathWorks
DATE: September 10th, 2009
TIME: 2:00pm ET/11am PT
Are you encountering integration errors in mechatronic systems late in
development during hardware prototyping?
Simulating mechatronic
systems in one environment that combines mechanical, electrical, and
control system modeling makes it easier to find performance errors early
in your development process. In addition, current simulation technology
allows integration of engineering data from different CAE tools, such as
CAD and EDA, reducing translation errors.
Attend this live webcast and learn how simulation can help you:
- Build multidomain mechatronic system models
- Predict and optimize system performance
- Understand and manage complex system interactions
- Detect design inefficiencies and integration errors during
development
- Verify and test mechatronic systems before building hardware
prototypes
Click here learn more and to register!
How to Select the Right Dispense Valve
Sponsored by EFD
DATE: September 17th, 2009
TIME: 2:00pm ET/11am PT
This webinar will provide an overview of the different types of dispense
valves and review criteria for matching valves to specific fluids and
applications.
Topics will include:
- Common types of assembly fluids
- Fluid/valve compatibility
- Matching the valve to the application
- Choosing a fluid reservoir
- Benefits of using a dedicated valve controller
Click here learn more and to register!
ARCHIVED WEBCASTS AVAILABLE FOR FREE VIEWING
Click
Here for a list of archived Machine Design webcasts.
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LPKF
Laser plastic welding supplier LPKF will unveil its LQ-Vario RT
compact laser welding machine at this year's Fakuma in Friedrichhafen,
Germany, October 13 to 17. 2009. The system, for small and medium
production runs, loads with an integrated rotary table or with loading
robots.
The company debuted its LQ-Spot laser-staking system in the spring. An
integrated system for feeding riveting materials into the process will
be available after Fakuma.
For more information, contact LPKF.
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ASG at AT Expo
ASG, a division of Jergens, Inc., will display
its products for light assembly and CE-certified industrial tools for
fastening, cutting, finishing and tool storage at the Assembly
Technology Expo (AT Expo) September 22-24 in Rosemont, Ill.
New products featured at the show include the patent-pending GEN-II
Pneu-Aira error-proofing system for pneumatic assembly tools. The
product works with push-to-start, auto-shut-off pneumatic screwdrivers.
The company will also display its Production and Professional
series of pneumatic industrial tools.
For more information, contact ASG.
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Editorial questions: Jessica Shapiro
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