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New 'breathable' rupture disk tech provides overpressure and vacuum relief

To increase equipment safety and reliability, a new rupture disk technology activates at a set burst pressure, but it can also "breathe" to relieve minor pressure fluctuations. The patent-pending, dual-function device from BS&B Safety Systems is ideal for use on low-pressure vessels that are susceptible to ambient temperature changes.
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Engineer's Toolbox: 9 considerations for specifying a slewing ring bearing

In applications that require a bearing to support a structure while it rotates (e.g., cranes, radar, tank turrets), premature bearing failure can put people and equipment at risk. While slewing ring bearings have proven themselves countless times in such applications, designers must consider many factors when specifying them. According to engineers at Kaydon, the bearing's support structure, mounting (including bolt strength, tensioning, and hole patterns), installation, and even storage are all factors in a bearing's success or failure.
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ClampDisk micro fastener is new alternative for automotive and consumer electronics

Designed as a unique alternative in assemblies for the automotive and consumer electronics markets, the ClampDisk Press-on Fastener is a new offering from PennEngineering that delivers a fast, simple way to achieve sheet-to-sheet clamped fastening while replacing the use of standard screws, nuts, and adhesives. The most common challenges that can be eliminated or reduced by using ClampDisk include over installation, cross threading, stripped screw heads, broken screws, and damaged product. This fastener can be removed easily with a sharp-edged tool.
Learn more and see how ClampDisk works.

New nylon constant torque hinge

Southco has expanded its line of E6 Constant Torque Hinges with a compact, nylon version designed for small applications. The newest addition to the company's E6 50 Constant Torque Position Control Hinge series measures 45 mm with a torque range of 4 to 16 in./lb and is 65% lighter compared to the standard E6 50 Hinge. It provides constant resistance throughout the entire range of motion, enabling users to easily position doors, display screens, and other mounted components and hold them securely at any desired angle.
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What injection molding material do I use?

How do you decide what type of plastic to use for your next injection molding project? Xometry can help you narrow your choices. Discover the different strengths and applications for materials that could be ideal for your application by learning about the most common plastic injection molding materials in detail.
Read this detailed Xometry article.

What are carbon composite bellows springs?

The Carbon Composite Bellows Spring (CCBS) from MW Components is a system of carbon fiber elements that combine to work as a high-performance, lightweight, and design-flexible compression spring meant to replace coil springs or metallic Belleville disc springs. A functional spring is made from several individual elements paired and joined to make a stack. The stack spring rate is determined by the number of elements, the base rate of each element, and their series or parallel orientation in the stack. Applications include motorsports, aerospace, and high-performance activities.
Learn more.

Conductive Brush Ring overcomes current leakage in EV powertrains

SKF's new Conductive Brush Ring paves the way to greater reliability and longer life in high-performance electric vehicle powertrain systems. Using pure carbon fiber bristles, it provides a reliable electrical connection between an EV eAxle rotor shaft and its housing. When used in combination with SKF Hybrid ceramic ball bearings, it helps to alleviate parasitic current effects that can lead to premature failure in bearings and other components. Available in different configurations for wet (oil-lubricated) motor designs -- and soon for dry (sealed) applications.
Learn more.

hyperMILL 2024 CAD/CAM software suite

OPEN MIND Technologies has introduced its latest hyperMILL 2024 CAD/CAM software suite, which includes a range of powerful enhancements to its core toolpath capabilities, as well as new functionality for increased NC programming efficiency in applications ranging from 2.5D machining to 5-axis milling. New and enhanced capabilities include: Optimized Deep Hole Drilling, a new algorithm for 3- and 5-axis Rest Machining, an enhanced path layout for the 3D Plane Machining cycle, better error detection, and much more.
Learn more.

One-part epoxy changes from red to clear under UV

Master Bond UV15RCL is a low-viscosity, cationic-type UV-curing system with a special color-changing feature. The red material changes to clear once exposed to UV light, indicating that there is UV light access across the adhesive material. Although this change in color from red to clear does not indicate a full cure, it does confirm that the UV light has reached the polymer. This epoxy is an excellent electrical insulator. UV15RCL adheres well to metals, glass, ceramics, and many plastics, including acrylics and polycarbonates.
Learn more.

SPIROL Press-N-Lok™ Pin for plastic housings

The Press-N-Lok™ Pin was designed to permanently retain two plastic components to each other. As the pin is inserted, the plastic backfills into the area around the two opposing barbs, resulting in maximum retention. Assembly time is quicker, and it requires lower assembly equipment costs compared to screws and adhesives -- just Press-N-Lok™!
Learn more about the new Press-N-Lok™ Pin.

Why hybrid bearings are becoming the new industry standard

A combination of steel outer and inner rings with ceramic balls or rollers is giving hybrid bearings unique properties, making them suitable for use in a wide range of modern applications. SKF hybrid bearings make use of silicon nitride (twice as hard as bearing steel) rolling elements and are available as ball bearings, cylindrical roller bearings, and in custom designs. From electric erosion prevention to friction reduction and extended maintenance intervals, learn all about next-gen hybrid bearings.
Read the SKF technical article.

3M and Ansys train engineers on simulating adhesives

Ansys and 3M have created an advanced simulation training program enabling engineers to enhance the design and sustainability of their products when using tapes and adhesives as part of the design. Simulation enables engineers to validate engineering decisions when analyzing advanced polymeric materials -- especially when bonding components made of different materials. Understand the behavior of adhesives under real-world conditions for accurate modeling and design.
Read this informative Ansys blog.

New FATH T-slotted rail components in black from AutomationDirect

Automation-Direct has added a wide assortment of black-colored FATH T-slotted hardware components to match their SureFrame black anodized T-slotted rails, including: cube connectors (2D and 3D) and angle connectors, joining plates of many types, brackets, and pivot joints. Also included are foot consoles, linear bearings in silver and black, cam lever brakes, and L-handle brakes. FATH T-slotted hardware components are easy to install, allow for numerous T-slotted structure configurations, and have a 1-year warranty against defects.
Learn more.

Weird stuff: Moon dust simulant for 3D printing

Crafted from a lunar regolith simulant, Basalt Moon Dust Filamet™ (not a typo) available from The Virtual Foundry closely mirrors the makeup of lunar regolith found in mare regions of the Moon. It enables users with standard fused filament fabrication (FFF) 3D printers to print with unparalleled realism. Try out your ideas before you go for that big space contract, or help your kid get an A on that special science project.
Learn more.

Break the mold with custom injection molding by Rogan

With 90 years of industry experience, Rogan Corporation possesses the expertise to deliver custom injection molding solutions that set businesses apart. As a low-cost, high-volume solution, injection molding is the most widely used plastics manufacturing process. Rogan processes include single-shot, two-shot, overmolding, and assembly. Elevate your parts with secondary operations: drilling and tapping, hot stamping, special finishes, punch press, gluing, painting, and more.
Learn more.

Electrostatic spacesuits may repel lunar dust for astronauts

Artemis virtual background of an Artemis crew member analyzing lunar regolith. [Image credit: NASA]

 

 

By Gregory Fischbach, Hawaii Pacific University

NASA's Artemis endeavor aims to make history in 2029 by landing the first woman and first person of color on the Moon, marking a phenomenal return to lunar exploration after over 50 years since NASA's last landing on the Moon. The Artemis endeavor signifies a substantial leap forward in space exploration, enabled by a host of new technology.

However, one persistent challenge NASA faces is lunar dust. Despite sounding mundane, lunar dust poses serious risks to both astronauts and the equipment on the lunar surface. According to NASA, lunar dust is composed of crushed rock, and this fine, abrasive, sharp dust can damage lunar landers, human lungs if inhaled, and interfere with instruments and mechanisms. Lunar dust even causes radiators to overheat and can destroy spacesuits. It also carries solar radiation on the sun-facing side of the Moon, making it cling to everything, compounding its potential risks.

To address this challenge, NASA established the Lunar Surface Innovation Initiative (LSII) in 2019. The LSII aims to stimulate interest and innovation in novel technologies for lunar exploration, with lunar dust being one of the key problems it actively seeks to resolve for the benefit of future generations of space travel.

Hawaii Pacific University (HPU) Assistant Professor of Engineering Arif Rahman, Ph.D., could have the answer that NASA is seeking with his innovative grant proposal to utilize liquid metal to repel lunar dust.

A $50,000 grant was recently awarded to HPU by MUREP Partnership Annual Notification (MPLAN), providing Rahman with the funds to build a LiqMEST (Liquid Metal Electrostatic Protective Textile) fabric at HPU that will actively repel lunar dust on demand, while being flexible and stretchable, ensuring enhanced safety and functionality in lunar environments.

HPU Assistant Professor Arif Rahman (right) with HPU student Greg Ball (left) in an electrical engineering laboratory at HPU. [Credit: Hawaii Pacific University]

 

 

"During my research career, I have worked with liquid metals like gallium alloys, which have the unique capability to be turned on and off, allowing them to appear and disappear based on specific conditions. I am well-acquainted with these dynamic properties," said Rahman. "So, when I learned that NASA has a problem with lunar dust sticking to the surfaces and posing a significant threat to the equipment and to the astronauts, it occurred to me that liquid metals might offer a potential avenue for developing an electrostatic or electrodynamic shield to mitigate these issues with lunar dust."

The LiqMEST technology used in the grant will utilize electrostatic forces to repel lunar dust, serving as an outer layer for NASA's spacesuits.

"The technology is designed to be stretchable, and when activated, it generates an electric field that repels lunar dust, preventing the dust from adhering to the LiqMEST fabric. This strategy can be applied both to spacesuits and fabric covers for lunar equipment during moon missions," said Rahman.

The HPU team working on the grant includes Rahman and engineering students. HPU engineering student Greg Ball was chosen first by Rahman to work on the grant with the goal to produce a prototype by the end of May 2024.

Once Rahman successfully creates a prototype next year, he plans to submit a full grant proposal to NASA to create a LiqMEST product for NASA for the development of a LiqMEST product for space use. This technology, developed in the labs and classrooms of HPU, has potential applications in future NASA missions exploring extraterrestrial landscapes.

Published November 2023

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