March 04, 2014 Volume 10 Issue 09

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Key factors for ball screw applications

Learn the six key factors that should be considered when specifying ball screw assemblies in motion control applications. PCB Linear gathered a panel of experts in the field of linear motion to concentrate on this important topic -- particularly when it comes to the company's new miniature ball screw product line. Learn about precision and accuracy, orientation, speed and acceleration, duty cycle, linear motion travel, and load capacity. Podcast available too.
Read the PCB Linear blog.


3D printer uses pellet extrusion system instead of filament

The latest addition to 3D Systems' industry-leading portfolio of EXT Titan Pellet systems is the EXT 800 Titan Pellet. With a build volume of 800 x 600 x 800 mm, this thermoplastics 3D printer harnesses the speed, reliability, and efficiency of the company's large-format pellet systems in a more compact unit with lower upfront investment. Use this machine to fabricate more modestly sized functional prototypes, tooling, fixtures, sand casting patterns, thermoforming molds, and end-use parts. Markedly faster than competing FFF and FDM printers, and up to 10X reduced material costs compared to filaments.
Learn more.


Test your knowledge: High-temp adhesives

Put your knowledge to the test by trying to answer these key questions on how to choose the right high-temperature-resistant adhesive. The technical experts from Master Bond cover critical information necessary for the selection process, including questions on glass transition temperature and service temperature range. Some of the answers may surprise even the savviest of engineers.
Take the quiz.


World's first current-carrying fastening technology

PEM® eConnect™ current-carrying pins from Penn-Engineering provide superior electrical connections in applications that demand high performance from internal components, such as automotive electronics. This first-to-market tech provides repeatable, consistent electrical joints and superior installation unmatched by traditional fastening methods. Features include quick and secure automated installation, no hot spots or poor conductivity, and captivation options that include self-clinching and broaching styles.
Learn more about eConnect pins.


New flat quarter-turn clamping fastener

IMAO Fixtureworks has expanded its One-Touch Fastener lineup to include a new quarter-turn clamping fastener that features an innovative flat design and is ideal for clamping in limited spaces. The QCFC flat quarter-turn fastener features a recessed body that protrudes only 2 mm from the mounted surface, a knob that rests flush inside the body, visible ON and OFF markings for safety, and an audible click when fully turned to clamped or unclamped position.
Learn more.


Bellows and disc couplings with higher torque capacity

Ruland Manufacturing now offers bellows and double disc couplings with bore sizes up to 1-3/4 in. or 45 mm for use in systems with torque up to 1,400 in.-lb (158 Nm). High-torque applications in precision semiconductor, solar, conveyor, and factory automation applications often use these shaft sizes. Ruland disc and bellows couplings accommodate all forms of misalignment, are zero-backlash, and have a balanced design for reduced vibration at speeds up to 10,000 rpm.
Learn more.


Simplify your designs with slewing ring bearings

According to Kaydon Bearings, "A slewing ring bearing has rolling elements designed to create a reactive moment within the bearing's dimensions envelope to oppose applied (overturning) moment load," so you can use one bearing instead of two, reducing the height requirements, and even improve performance. Slewing ring bearings can also simplify a drive system by utilizing gear teeth on the inner or outer race. Learn all about slewing ring bearings in this informative article.
Read the Kaydon whitepaper.


Jet valve for ultra-small dispensing

DELO's DELO-DOT PN5 LV pneumatic jet valve is designed for micro-dispensing low-viscosity adhesives and other media in miniaturized applications. Thanks to its compact design, it also requires very little space to install in production systems. Interchangeable nozzles with different diameters and a flexible, adjustable plunger stroke ensure precise and reliable applications at different droplet sizes. Volumes of as low as 1 nl can be achieved, which corresponds to droplet diameters of 250 µm or less.
Learn more.


Stainless steel constant-torque flush-mount hinge

Southco has introduced a flush-mount version of its popular and durable E6 constant-torque hinge. Its low-profile, corrosion-resistant package makes it an ideal solution for maximizing security, longevity, and aesthetics. It offers high torque for demanding applications while maintaining its low profile. Lots of uses.
Learn more.


Claw vacuum pump for industrial applications

Vacuum expert Leybold has added a new model to its proven CLAWVAC dry claw vacuum pump series: the CLAWVAC CP B. This innovative, rough vacuum pump, designed for robust processes including food processing, material handling, and environmental industries, is powerful, energy efficient, and easy to clean. The intuitive handling of this unit is mainly due to its functional design, which features a pair of claws that rotate in the cylinder with no contact or wear. Its separate gearbox prevents oil contamination. The design ensures short downtimes and long service intervals: 20,000 hr between oil changes and up to 48,000 hr between general overhauls.
Learn more.


DualVee linear guides and tracks used in warehousing

See how Bishop-Wisecarver's DualVee® motion tech can add huge benefits to warehousing operations. This video highlights two applications: a manual storage and retrieval system and an automated storage and retrieval system of long aerospace-grade carbon fiber in sub-zero temps. Patented DualVee guides and tracks keep operations running smoothly.
View the video.


Build-to-order knobs and hand hardware

Rogan Corp.'s innovative use of two-shot plastic injection and insert molding has been providing customers with high-quality plastic clamping knobs, levers, and control knobs for almost 90 years. Rogan offers concurrent engineering, product design, and assistance in material selection to ensure customer satisfaction for standard or customized parts, with a focus on cost optimization and on-time delivery. Custom colors, markings, decorative inlays, or engineered materials to meet special requirements, such as adding extra strength or utilizing flame-retardant material, are all offered.
Learn more.


Slewing ring bearing made of wood and plastic

The PRT-02-30-WPC slewing ring bearing is another step forward by igus toward integrating renewable raw materials into industrial production. Made of 50% wood and 50% high-performance plastics, the cost-effective and lubrication-free slewing ring bearing balances strength and durability with a proven low CO2 footprint. The materials incorporate solid lubricants, making the new slewing ring bearing smooth running and maintenance-free.
Learn more.


Flex Locators for quick fixture changeover

Flex Locators from Fixtureworks are designed for quick changeover of small and large fixtures, automation components, and more. They are ideal for applications that require frequent disassembly, providing excellent repeatability for locating and clamping in a single operation. Manual and pneumatic versions are available. Just turn the handle, knob, or screw!
View the video.


Copper foam -- so many advantages

Copper foam from Goodfellow combines the outstanding thermal conductivity of copper with the structural benefits of a metal foam. These features are of particular interest to design engineers working in the fields of medical products and devices, defense systems and manned flight, power generation, and the manufacture of semiconductor devices. This product has a true skeletal structure with no voids, inclusions, or entrapments. A perennial favorite of Designfax readers.
Learn more.


Cummins-Peterbilt SuperTruck gets Modine waste heat recovery heat exchangers

Modine Manufacturing Company, a world leader in thermal innovation, is developing a series of compact heat exchangers designed to capture waste heat from the exhaust stream of a diesel engine and convert this heat into useful power to improve engine efficiency and reduce CO2 emissions.

As part of this development effort, Modine has been involved in a Department of Energy-sponsored program called SuperTruck and has provided these heat exchangers to a Cummins-Peterbilt concept vehicle for comprehensive road testing. During this road testing, the vehicle achieved 10.7 mpg. The truck also demonstrated a 75 percent increase in fuel economy in head-to-head testing over a 24-hr time period compared with a 2009 baseline truck. These results translated to a 43 percent reduction in greenhouse gas emissions and an 86 percent gain in freight efficiency. The vehicle was on display at a recent event in Maryland where President Obama announced that work would begin on the next phase of national greenhouse gas and fuel efficiency requirements for commercial trucks.

The Department of Energy (DOE) initiated the multi-year SuperTruck program in 2010 with the goal of designing a heavy-duty Class 8 truck that achieves a 50 percent improvement in overall freight efficiency. That increase in fuel economy would save about $25,000 annually based on today's diesel fuel prices for a long-haul truck traveling 120,000 miles per year. The DOE set the goal of attaining part of the overall efficiency gains from engine improvements, with the remaining gains coming from other vehicle improvements such as aerodynamics, use of lighter-weight materials, and reduction of friction in the drive train. Class 8 trucks represent only about 4 percent of the on-road vehicles in the United States but are responsible for almost 20 percent of the country's on-road fuel consumption.

The Cummins-Peterbilt collaboration was one of several DOE-selected partner projects. The objectives of this partnership were to develop and demonstrate a highly efficient and clean diesel engine, an advanced Rankine-based waste heat recovery system, an aerodynamic Peterbilt tractor-trailer combination, and an auxiliary power unit (APU) to reduce engine idling. Cummins and Peterbilt selected Modine to provide the heat exchangers for the waste heat recovery system.

The Rankine-based waste heat recovery system operates similarly to a conventional stationary power plant. A power fluid is boiled using the heat from the diesel engine exhaust and is sent to a turbine, which converts this heat into mechanical energy. By recovering this energy from the exhaust, the diesel engine uses less fuel and CO2 emissions are reduced. Multiple heat exchangers are required for this system to operate efficiently.

However, unlike a conventional power plant, these heat exchangers must be miniaturized to fit under the hood and on the chassis of a conventional Class 8 truck. "Our research engineers utilized Modine's technology building blocks to develop highly compact heat exchangers to meet the thermal management and space requirements of this new challenge," says Lawrence Gabbey, Modine Research Engineering Section Manager and Program Manager for the SuperTruck program. "Leveraging the success of this demonstration program, Modine continues to develop this waste heat recovery technology in preparation for future commercial opportunities around the globe in the commercial vehicle and automotive markets."

The Modine SuperTruck front-end cooling module consists of a radiator, charge-air cooler, air-conditioning condenser, and new waste heat recovery condenser. Lower left (in front of the module): stainless steel EGR Boiler-Superheater for the engine. Lower right: aluminum Recuperator. Both additional heat exchangers are part of the waste heat recovery system. This photo depicts six Modine heat exchangers in all. Modine also provides a tailpipe boiler.

 

 

 

 

"Fuel economy and the reduction of CO2 emissions are two strong technology drivers that will create many opportunities for Modine heat exchanger technology in the future," says Jonathan Wattelet, Modine's Global Director of Research and Technical Services. "The SuperTruck public-private partnership sponsored by the Department of Energy has been an excellent opportunity to leverage our research in areas where longer-term research is too risky to undertake alone. Working with engine and commercial vehicle leaders such as Cummins and Peterbilt has been an outstanding opportunity for Modine to obtain much-needed engine test cell and road testing experience for our newly developed heat exchanger technology."

Want to know more details about the Cummins/Peterbilt SuperTruck project? You can view an in-depth 2012 presentation (PDF) by clicking here.

 

 

Source: Modine

Published March 2014

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