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| The latest information on hydraulic and
pneumatic motion control.
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April 6, 2009
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Keeping up with the
community
We at H&P truly believe that the fluid power community is a
strong, growing community. Despite a struggling economy, and slowing
sales, fluid power users and suppliers are still actively engaged in
promoting and learning about the industry. Several shows and conferences
are still being held in the next few months with record exhibition space
and attendee numbers, including Hannover Fair in Germany, OTC in
Houston, and ICUEE in Louisville in the fall.
We too are hoping for a better-than-ever Fluid Power
Conference & Expo in June as well. This time, we're co-locating with
Waste Expo on
June 8-11 in Las Vegas. The event offers an extensive conference
program. We will return again with popular information sessions on
hydraulic troubleshooting, safety, and more.
Attendees can see all exhibits in both shows, plus attend any and all
Fluid Power Conference & Expo seminar sessions. The cost is only $75 for
one day, and $150 for two days! Register here and click on “Non-Member Registration” to
get started. (To get the $75 or $150 price, be sure to register for
“Fluid Power Conference & Expo.”) For more information on the Fluid
Power Conference and Expo, contact Michael Ference or call
(216) 931-9352. For more information on WasteExpo, contact Rita Ugianskis or call (813)
994-4654.
- Mary C. Gannon
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Simulation of an HST undergoing inertial
testing
Because it is relatively inexpensive to determine the suitability of
a given system design before any hardware is acquired and before
prototype systems are assembled, simulation is one of the most important
implementations of mathematical models. Furthermore, competing designs
and hardware choices can be evaluated and compared. To illustrate the
steps in conducting a simulation, a hydrostatic transmission has been
modeled using the proposed Type 1 models for the pump and motor.
Simulation will be used to study the dynamic details of the transmission
during cyclic life testing. The hydrostatic transmission model, as
simulated, is shown in Figure 1.
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Hydraulic Replacement Seals Available
from ExpresSeal®
in 24 to 48 Hours
 ExpresSeal®
can replace your existing hydraulic or pneumatic seal with near replicas
or replacements of the original manufacturer seal in 24-48 hours.
Popular materials include Polyurethane, Buna, EPDM, Viton, HNBR, Teflon,
filled-Teflon, Silicone and engineered plastics (special compounds are
available). As the fastest way to get the seal you need, ExpresSeal®
delivers off-the-shelf solutions from an extensive inventory of standard
seal profiles or instant prototypes. Seals for emergency replacement can
be produced and quickly shipped in virtually any standard
profile.
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Web Exclusive: Rodless air cylinder keeps
conveyor trim and compact
Manufacturing and packaging facilities may move and sort tons of
bulk on conveyors, but the sorters, diverters, and pull-offs that route
products to their next destination must be as trim as possible to make
the most of valuable floor space. Engineers at Hytrol Conveyor Co.,
Jonesboro, Ark., needed such a space-saving solution when designing a
diverter for an overhead pull-off system that would divert 150-lb boxes
to a different conveyor line. For help with the solution, Hytrol turned
to Tolomatic of Hamel, Minn., manufacturer of rodless-style actuators.
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Making a leaner, meaner excavator
It's not often you can increase the power output of a machine while
also making it more fuel efficient. But that's just what engineers have
accomplished with the CX800B excavator from Case Construction. Of
course, power and efficiency are closely tied to the engine. But because
virtually all mechanical output of the machine comes from hydraulics,
power and efficiency are also closely tied to those of the hydraulic
system.
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Engineering hose assemblies for safe and
reliable performance
Hose assemblies simplify many issues when designing, building, and
maintaining hydraulic equipment. Flexible hoses are easier to route and
install, compared with rigid tubing and pipe. They lessen vibration and
noise, dampen pressure surges, and permit movement between parts.
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Honing tools
MMT superabrasive and diamond honing tools for hydraulic valves from
Sunnen deliver five times longer tool life and micron-level accuracy.
They are suited for bore sizes from 4 to 65 mm. Custom-engineered for
high-volume, high-precision honing with minimum burr condition, they
feature a body and feed wedge made from hardened tool steel and produce
accuracies of 0.0006 mm for diameter, roundness, straightness, and
taper. Design options include one- to 12-stone versions, designed for
use with metal-bond diamond or CBN superabrasives. Retention springs
hold the honing stones firmly in place.
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Refrigerated extractor dryer
Refrigerated extractor dryers from Laman Corp. provide reduced
dewpoint temperatures and air line filtration all in one unit for
compressed air applications. It uses cold coalescing to continuously
remove condensed liquids. Refrigeration cools the air to condense
aerosols into liquid contamination. It is used in the cold circuit to
remove liquid contamination where it is formed and it also filters solid
particles down to 5 µm. Clean dry air is then reheated to a useable
temperature prior to exiting the device, resulting in compressed air
that is clean and dried to eliminate any condensation downstream.
Features include lighted power on/off switch, refrigeration circuit
condition indicator, and a condenser panel filter.
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Hydraulic fittings
Custom designed fittings from Parker Page International can be
produced with special grooves, threads or other modifications that
enhance compatibility to applications. Combination hose fittings and
flanges were created with location pins or notches making an assembly
unique to ensure assemblies were not used interchangeably on different
models of equipment. PVDF or FEP coatings can be applied to stock
fittings to aid in food processing, eliminating downtime from build up
on normal materials saving time and money. They are available in carbon
steel, stainless steel, and special alloys, such as Monel, Hastelloy or
Iconel. Sizes range from 1/8 to 4 in.
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Suction cups
Duraflex friction cups from Piab grip oily and wet surfaces. Grip
pattern enables operators to safely and reliably move slippery metal
goods without slowing production lines, helping to reduce product
droppage and lower scrap rates. Rough cleat surface and sharp cleat
edges and channels create high friction and strong hold. Duraflex
polyurethane will not break or crack after exposure to ultraviolet
light, heat or ozone. Soft lip molds easily to curved surfaces for less
vacuum leakage and stronger grip. Models include BFF for handling
concave and convex surfaces and FCF for handling larger metal sheets.
Oval shape is available for products with narrow surfaces. They operate
in temperatures between 10º to 40º C.
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Energy Efficiency Web Conference & Expo –
May 14
Do you know you can get in-depth education on energy-efficiency and all
the benefits of an in-person trade show without ever leaving your desk
or spending a dime?
The intelligent use of energy is making headlines. Product designers and
manufacturers are striving to deliver products that consume less power,
extend battery life, generate less heat, or work from alternative energy
sources. Our Energy Efficiency Web Conference and Expo will
educate design engineers, product developers, and managers on how to
make the best use of energy-efficient product innovations and devices,
and on how to arrange them in systems to lower power consumption and
stay "green." This special one-day event will include sessions
on such areas as:
- Power-efficient drive techniques for lighting
- ROI for high-efficiency capital equipment
- Energy monitoring and energy standards
- Designing for SEMI S23 and the Energy Act of 2007
- Working with alternative power and battery technology
Make plans now to attend the Energy Efficiency Web Conference and Expo. The
event offers a full day of live webinars and interactive booths, along
with a Resource Center where visitors can download or link to additional
materials.
Register Now!
Machine Design Video Spotlight
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High-flex silicone
flat cable |
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A silicone injection molding process
developed by Cicoil Corp. embeds wires, coax, fiber optics, and even
piping into a single highly flexible flat cable for industrial
applications. |
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.
Multiple Path Navigation
Find content your way. Improved site navigation creates multiple ways to
find the content you are looking for.
Supercharged Search
The search function has been highly improved and tested to provide the
most effective results for engineers.
Highlighted Resources
Looking for CAD drawings? Find them in our CAD Library.
Download whitepapers in the Whitepaper
Library. Valuable educational content is featured in the eBook
section. Check out the latest in editorial and sponsored video
in the Video
section.
UPCOMING WEBCASTS
Design Essentials for Plastic Gear Peformance
Sponsored by Thermotech
DATE: April 9th, 2009
TIME: 2:00pm ET/11am PT
Engineers are focused on creating cost effective, energy efficient
designs that offer performance and high value to the end customer.
Luckily, advancements in design, materials, manufacturing and inspection
have made it possible to meet product development goals and expand
plastic gear applications.
The webinar presents a unique approach to plastic gear development
including:
Critical gear design principles
Performance requirements to determine optimal materials
selection
Overview of tooling optimization technique
Metrology methods for plastic gears
Live question/answer session with presenters
Click here to register!
Efficiency in Fractional HP Motors & Gearmotors
Sponsored by Groschopp
DATE: April 16th, 2009
TIME: 2:00pm ET/11am PT
Efficiency is often one of the last factors that design engineers think
about when specifying for an OEM application, yet it is critical to a
successful, optimized design in many ways. Join Groschopp engineers Ron
Didier and Jared Birk for an overview of efficiency as it relates to
other design considerations such as power source, operating cost,
temperature, purchase cost and size.
Webcast attendees will receive an early release download of the new STPe
desktop design tool that allows engineers to calculate operating cost
based on speed, torque and power requirements and local kwh energy
costs.
Click here learn more and to register!
Improving Collaboration with Customers and Suppliers
Sponsored by PTC
DATE: April 23rd, 2009
TIME: 2:00pm ET/11am PT
The need to respond and capitalize on new customer requirements is more
important than ever during the current economic downturn. However, the
pressures of globally distributed design teams and more stringent time,
cost, regulatory and quality requirements continue to complicate the
product development process. In order to succeed, Small and Medium
Organizations need to collaborate across project teams more efficiently
to bring the right products to the marketplace at the right time.
In this live webcast, you’ll learn best practices to effective
collaboration:
- Enabling concurrent engineering with members of a distributed
design team
- Conducting efficient design reviews across the value chain
network
- Creating a controlled collaboration environment
- Proving secure collaboration to the design team and
suppliers
Learn how to build an engineering collaboration framework that’s best
suited for your business
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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Kurt Hydraulics
The number 1 hydraulic hose and coupling alternative. Over 1500 coupling
models and over 3 million feet of hose. interchangeable with other
popular brands and meet SAE specifications.
www.kurthydraulics.com
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Contact Information
Editorial questions: Mary Gannon
216-931-9498
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Machine Design
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