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Maybe it's the heat or the slightly relaxed summer schedule, but I
always feel my motivation slipping away and my brain turning to mush
this time of year. If you're in the same boat, why not challenge
yourself with a round of World's Smartest Design Engineer? You may learn
something new, or surprise yourself at how much you already know. If
you've been playing, remember that we're adding new questions all the
time, many based on content in Machine Design.
In this week's fastening and joining content:
Plus, scroll down for new products, news from
Machine Design,
and industry updates. Tell us what you're
doing to stay sharp during the dog days of summer at machinedesign.com,
on our discussion forums, or by email.
Jessica Shapiro
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Anaerobic adhesives seal and secure
assemblies
One type of fastening component can boost equipment lifetime and
reliability while cutting manufacturing, service, and warranty costs.
Sound like a pipe dream? For designs that have threaded joints, mating
flanges, or close tolerance shaft fits, anaerobic adhesives working as
threadlockers, thread sealants, retaining compounds, and gaskets might
do the trick.
One-size-fits-all adhesive threadlockers keep assemblies secure and
leakproof throughout service life. They completely fill voids between
interfacing threads with tough resin, providing 100% contact between
surfaces and preventing side-to-side movement, loosening, corrosion,
leakage, and galling.
Read the full article.
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PEM® MICRO STANDOFFS (TYPE MSO4™)
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 PEM® Type
MSO4™ self-clinching micro standoffs are used to stack or space
internal components and provide strong, permanent, and reusable
load-bearing threads in metal sheets as thin as .016” / 0.4mm.
Thread sizes have been developed as small as M1 and are available in
unified fastener lengths .094” and .125” and 2mm and 3mm in
metric.
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Power to the people, but in what
units?
Here’s an irony: Though power and energy regularly make the news,
few people know what these two entities are. Discussions of alternate
energy sources tend to mistakenly use the terms interchangeably. While
power and energy are related, each has a specific meaning.
Read the full article to review the basics.
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Load cell compression calibration
errors
Pulling a load cell (tension) results in an inherent axial alignment
with the force vector. But once you begin to reverse the force and push
(compression), the force vector doesn’t necessarily want to remain in
line with the object being pushed. It’s easy to see a rope buckle
under a compressive axial force, but it’s not so easy to see what’s
happening in a load cell. The load cell reacts to the applied force that
may or may not be in alignment with its axis.
The uncertainty of the measured result can become greater than that of
the load cell uncertainty when measured under ideal conditions. Thus, it
behooves the end user to understand the challenges of applying load
cells in compression and, more importantly, how the reliability of the
cell’s calibration data affects real-world measurements.
Read the full article.
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Cryogenic epoxy
EP29LPSP two-component epoxy adhesive/sealant withstands
temperatures down to 4 K and cryogenic shocks such as cooling from room
temperature to liquid helium temperatures in 5 to 10 min. It cures with
a low exotherm at room temperatures or at 130-165°F for 6-8 hr. The
epoxy bonds well to metals, glass, ceramics, and some plastics. It
resists chemical attack and is optically clear.
EP29LPSP has a tensile strength of 6.5 ksi and a tensile modulus over
375 ksi. The cured epoxy's volume resistivity is over 1015
ohm-cm, and its dielectric constant is 3 to 4. It has Shore D hardness
over 65. EP29LPSP has a mix ratio of 100:65 by weight and a mixed
viscosity of 400 cps. It comes in pint, quart, gallon, and 5-gal kits
as well as syringe applicators.
Master Bond, Inc.
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Infrared spot-curing power meter
The iCure P200 power meter is for measuring optical power from
thermal spot curing systems. The plug-and-play tool's power monitor and
power detector work with iCure AS200 thermal spot curing systems in
manufacturing environments. The compact meter measures power up to 15W
and can calibrate multiple systems using a preset power set-point.
IRPhotonics
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Spinning clinch bolt
PEM SCB and SCBJ spinning clinch bolts permanently captivate screws
in thin metal panels while letting them spin freely to eliminate loose
fasteners. SCB fasteners have an unthreaded neck for axial float while
and SCBJ hardware have a jacking feature. Both press into holes in
aluminum or steel sheets as thin as 0.040 in. The squeezing force
applied to the top of the screw head and the underside of the sheet
material forces the shoulder of the screw into the sheet and displaces
sheet material into the void under the head and shoulder of the screw,
permanently captivating the fastener.
PEM spinning clinch bolts come in various lengths and thread sizes from
#4-40 through #6-32 and M3 through M4. Detailed specifications and part
drawings for these RoHS-compliant fasteners are at www.pemnet.com.
PennEngineering
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Inaugural joining honor
awarded
Joining
Technologies, Inc. established the Thomas A. Edison Award for
Technology Innovation. The honor, to be awarded periodically to vested
associates of Joining Technologies and affiliate companies, focuses on
young engineers and inventors who develop influential technology. The
first recipient, Joining Technologies engineer Scott Boynton, developed
a laser cutting and welding system for splicing strip alloys.
Award guidelines are informal for now, according to company founder
Michael Francoeur. "I envision the incumbent award holder choosing the
next recipient. Perhaps in the future it will evolve to include young
inventors in the surrounding community.”
For more information, visit Joining Technologies.
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Plasmatreat opens U.S. technical
center
Plasmatreat, Steinhagen, Germany, opened a new U.S.
office and technical center in Elgin, Ill. The 5,000 ft2
facility contains an R&D laboratory with the company's Openair plasma
installations, industrial robot systems, printing and coating
capabilities, and facilities for testing adhesive bonding.
Customers and technical experts can scale processes up from the lab,
through pilot testing, to full-scale production. The Openair plasma
system safely plasma treats surfaces to improve bonding, finishing, and
printing in industrial applications.
For more information, visit Plasmatreat.
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iCure infrared spot curing selected
for medical devices
IRphotonics, Hamden, Conn., announced that a
U.S.-based medical-device manufacturer selected the iCure Spot curing
system to bond microelectronic components on a disposable medical
device. iCure streamlined the manufacturing process from a multi-step
batch process to single piece flow. Cycle time was shortened by 30
min.
The iCure AS200 delivers heat by infrared radiation from a portable unit
to a pinpoint cure spot via optical fiber. Applications include spot
curing of thermal epoxies, bonding and fixing of plastic and glass
components, temporary fixing of miniature components, precision
semiconductor assembly, microsoldering, and localized heat welding of
thermoplastics.
For more information, visit IRPhotonics.
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PennEngineering
PennEngineering, founded in 1942, provides fastener design and product
assembly solutions worldwide for diverse industries, including
electronics, computer, data/telecom, medical, automotive, marine,
aircraft, and general manufacturing.
www.pemnet.com
Hernon Manufacturing, Inc.
High Performance Adhesives, Sealants, and Precision Dispensing Solutions
– Single Source Solutions
hernon.com
New Loctite® Threadlockers
Loctite® 243™ Medium Strength Blue Threadlocker and
Loctite® 263™ High Strength Red Threadlocker provide:
• upgraded temperature resistance up to 360°F
• oil tolerant curing on as-received fasteners without cleaning
• primerless performance on both inactive and active metals
For a free sample and more info, go to www.useloctite.com/MA23
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