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With Memorial Day behind us, summer has officially begun. Kids are
graduating from school or at least itching for summer vacation to begin,
but those of us in the working world don't get to take a break from
learning about developments that affect our work.
Perhaps summer means more flexible work schedules or a more relaxed pace
at your job, or you're trying to stay current while looking for the next
opportunity. In any case, summer is the perfect time to learn something
new. Check out seminar offerings from professional societies you belong
to, register for an upcoming or archived webinar from
Machine Design,
or browse through past and present articles on our website.
You can start here, with articles on vibration
isolation, surface prep for medical
applications, and fastener trends, as well as
new product offerings, and the latest industry news.
As always, we are interested in hearing your comments on the Machine Design
website, on our discussion forums, or by email.
Happy summer,
Jessica Shapiro
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Negative stiffness a big positive for
vibration isolation
If you’re trying to isolate sensitive equipment from vibrations,
air tables and other pneumatic systems come to mind. The low-frequency
vibration isolation and precise control needed to support
state-of-the-art instruments for microelectronics fabrication,
industrial laser and optical systems, biological research, and other
areas may seem to call for expensive active vibration isolators, but
negative-stiffness vibration isolators can provide the necessary
protection at a reasonable cost.
Read the full article.
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Surface treatments for wettability
From Machine Design's sister publication Medical Design:
Advanced surface treatment techniques such as air plasma, flame plasma,
and chemical plasma discharges are playing key roles in the design and
development of medical devices comprised of such polymers as high
molecular weight polyethylene. The techniques alter the first few atomic
layers of the polymer so troublesome materials such as polyolefins,
silicones, and fluoropolymers can adhesively bond.
Read the full article.
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BobTail.® Huck’s next-generation
lockbolt system
 The advanced
BobTail® lockbolt system from Huck offers quick, quiet, two-second
installation for maximum productivity, with the same vibration-resistant
reliability Huck is known for. Patented BobTail Swageforward®
tooling, exclusive to Huck, is lightweight and ergonomically designed
for ease of use. Available in a wide range of sizes and grades, BobTail
fasteners and tooling are precisely matched to the application, offering
lower installed costs and increased user safety for both assembly and
repair.
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Trendspotting: Fasteners
Engineers and designers could draw some interesting conclusions by
using Google Trends (google.com/trends) to see how many Google searches
were done on the terms “bolts,” “rivets,” and “screws.” For
example, rivets don’t seem to get a lot of attention, but the
attention these fasteners do get is rock steady compared to that given
bolts and screws.
Read the full article.
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Rotating-component fasteners
The M-Type Shaftlock rotating-component fastener is used as a
locking device for rigidly mounting hubless gears, sprockets, pulley,
cams, or thinwalled components onto an inch or metric shaft. Tightening
the nut of the two-part fastener causes the slotted sleeve to contract
and grip the shaft, clamping the part to the sleeve at the same time.
Available sizes include 0.375, 0.5, 0.625-in. shafts, as well as 10, 14,
and 16-mm shafts.
Stock Drive Products
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Heat-insert driver
The Model HM manual heat insert driver installs heat and ultrasonic
style inserts into plastic assemblies. The driver’s ceramic-coated
shaft and Freelon bearings permit smooth operation.
The unit has a 10 in. × 12 in. base, 7.5-in throat clearance, and a
3.5-in. stroke. Operators pull a lever to move the driver’s tip. A
micrometer-style positive stop sets stroke stops with up to ±0.005 in.
accuracy.
Spirol International Corp.
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Spline shafts with mated bushings
Lightweight aluminum spline shafts are coated with low-friction TFE
and mated with a graphite and PTFE-filled thermoplastic bushing. The
bushing’s integral brass collar facilitates mounting without nut
distortion. Shaft straightness is 0.003 in./ft and radial and torsional
clearance between the shaft and bushing is 0.002 to 0.003 in. An
antibacklash assembly is available for additional stiffness.
Nordex Inc.
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Machine Design Video Spotlight
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Membrane Switches for
Harsh Environments |
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Joseph Schwartz from The Bergquist
Co. shows Lee Teschler of Machine Design magazine the advantages
of heat-sealed membrane switches over pressure sensitive adhesive (PSA)
membrane switches in harsh environments. |
Check Out the New Machinedesign.com
Our newly redesigned web site still features the best content and
information for engineers provided by engineers but with these new great
features.
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Find content your way. Improved site navigation creates multiple ways to
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in the Video
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UPCOMING WEBCASTS
Understanding Key Power Transmission Technologies:
Comparing Belt, Chain & Gear Drives for OEM Projects
Sponsored by Rexnord
DATE: May 28th, 2009
TIME: 2:00pm ET/11am PT
OEM design teams are under pressure to juggle technologies with
specifications with the outcome always being a great new or improved
product. Many of these projects have Power Transmission components at
their core and the wrong technology can really hurt the end product.
Dennis Missun and Nick Derus from Rexnord have gathered
information about the critical issues that need to be considered when
deciding between belt, chain and gear drive technologies for
applications requiring 5 lbs – 100 lbs of force.
The course will cover
- Torque Density: comparing key rating systems AGMA & ISO
- Application considerations: impact of thermals, friction and
vibration
- Basics of sizing & selection: information to right-size
components
- Other Project/End Customer Considerations
- Live question/answer session with presenters
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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GRK publishes data for concrete
screws
GRK, a manufacturer of industrial and construction fasteners, has
published technical data for its Caliburn Concrete Screw, its RSS
Structural Screw, and its R4 Multi Purpose Screw. Users can access the
data at the GRK website.
The company also has an instructional video covering the installation of the Caliburn
product.
For more information, contact GRK Fasteners.
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IRphotonics field trial
complete
Infrared-based materials and systems company IRphotonics announced
the completion of a field trial with ITF Labs for its iCure AS200
Infrared spot-curing system. The trial cured was 353ND adhesive on an
optoelectronics device where localized curing must be achieved without
heating adjacent components.
The iCure AS200 delivers infrared radiation to the cure location with
inline fiber optics. The focused radiation speeds cure, produces strong
bonds, and does not heat delicate electronics or materials near the cure
area. The system uses a 200-W lamp with up to 80 W/cm² and is
available benchtop or rackmount configurations.
For more information contact IRPhotonics.
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Editorial questions: Jessica Shapiro
216-931-9850
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216-931-9893
Machine Design
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