June 28, 2022 Volume 18 Issue 24

Mechanical News & Products

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Custom maintenance-free toothed belt pulleys delivered in just 48 hr

Motion plastics leader igus has expanded its 3D-print and online ordering offering to include custom-format toothed belt pulleys. Toothed belt pulleys are a common component in many machines and are widely used in linear drives of printers, robots, and packaging machines. However, if an individual variant is required, developing a custom component can take days or even weeks. igus now offers manufacturing by 3D printing, reducing delivery times from several weeks to just 48 hours.
Learn more.


Machine-ready blanks from TCI Precision Metals

TCI Precision Metals will be showing its precision Machine-Ready Blanks capabilities to customers at IMTS 2022 this September. Machine-Ready Blanks of aluminum, stainless steel, and other alloys help shops shorten setup time, reduce scrap, and increase overall throughput up to 25% by eliminating material prep. These blanks are guaranteed to arrive machine-ready for production, with standard-size blanks in low quantities ready for immediate shipping, Custom blanks in production quantities can be ordered for quick turnaround.
Learn more.


Engineer's Toolbox: How to pin a shaft and hub assembly properly

One of the primary benefits of using a coiled spring pin to affix a hub or gear to a shaft is the coiled pin's ability to prevent hole damage. Another is the coiled pin absorbs wider hole tolerances than any other press-fit pin. This translates to lower total manufacturing costs of the assembly. However, there are a few design guidelines that must be adhered to in order to achieve the maximum strength of the pinned system and prevent damage to the assembly.
Read this very informative SPIROL article.


Xometry launches Industrial Buying Engine: Access 500,000 top suppliers

Xometry had a lot of news to share on June 16, including the launch of its Industrial Buying Engine on Thomasnet, where enterprise customers can source and purchase from more than 500,000 top suppliers. The new capability digitizes the request-for-quote process, condensing to just hours or minutes what once took days or weeks to complete. Buyers can request quotes for products and services from trusted, high-value suppliers, and they can also access the Xometry Instant Quoting Engine for more immediate transactions. Learn all about it -- and Xometry's other manufacturing news -- in this on-demand webinar.
Watch the Xometry presentation. No registration required.
Read about the new Xometry capabilities.


Knob with a twist makes for easier operation

Created with ergonomics in mind, Rogan's new ST series clamping knobs feature a contoured design that allows for more comfortable operation and ease of function. Perfectly engineered for applications in industrial, medical, lawn and garden, and consumer, ST knobs are made of glass-reinforced polypropylene with zinc-plated brass inserts or zinc-plated steel studs. Available in black, grey, white, blue, yellow, green, or red. Completely customizable too.
Learn more.


Tech Tip: Wave spring vs. coil spring -- what's the difference?

The key advantage of using a wave spring is in the axial space savings. Whether it is a static or dynamic application, a wave spring can provide the same force and deflection as a coil spring -- but in considerably less space. There are many other advantages of using wave springs, including cost savings when considering the whole assembly.
Learn more in this informative Smalley blog.


Turn any pipe or hose into a conveyor! Now with custom options

EXAIR's Line Vac Air Operated Conveyors provide an efficient method of converting ordinary pipe, hose, or tubes into powerful in-line conveyors. EXAIR can customize Line Vacs to different specs, such as unique sizes, shapes, and materials, for the perfect system fit. Even smaller sizes can be created while still offering the same quality of conveyance. In applications where stock aluminum or 303 and 316 stainless steels won't work, alternate materials are available. Prices start at just over a hundred bucks.
Learn more.


Slash setup times with One Touch Sliding Locks

One Touch Sliding Locks from IMAO Fixtureworks provide quick and secure positioning and locking. Users can prevent misalignment and quickly lock with a quarter turn of the knob or handle. Ideal for slide position adjustment with a sliding bar or a slotted hole, these easy-to-use sliding locks reduce set-up times in a wide variety of applications. They feature secure locking with a wedge mechanism.
Learn more.


What's a magnetic GHOST fastener?

PEM® GHOST™ Fastening Technology from Penn-Engineering uses a fully concealed pinch-lock mechanism to create a secure and sleek lock with zero visible evidence of disassembly once engaged. Using a magnetic release tool on the concealed fastener actuates the internal components, unlocking the pinch-lock grip and instantly releasing the pin from the fastener. From automotive interiors to access control systems, this clever fastening tech is adaptable to many applications.
View the video.


Torque transducers and test machinery use Zero-Max CD Couplings

Torque transducers and test machinery experience extreme demands, including high torque loads and high operating speeds that cause stress on connected components. To assure these systems generate accurate test data, system designers specify CD Couplings from Zero-Max. Using Zero-Max's proprietary Composite Disc-Pack (CD), CD Couplings provide the ideal combination of high torque capacity, high torsional stiffness, and low reaction loads under misalignment.
Learn more.


Desktop Metal introduces robotic sand 3D-printing system

Desktop Metal has launched the automated ExOne S-Max Flex large-format binder jetting system that 3D prints sand tooling, which foundries can use to cast complex metal designs for the aerospace, automotive, and energy industries, among others. Sand binder jet 3D printing has been used in foundries for more than two decades to create metalcasting tooling cost effectively and with low turnaround times.
Read the full article.


Friction bearing universal joints for packaging

Friction bearing universal joints are available from Ruland in a wide variety of sizes, styles, and materials, giving packaging equipment designers more than 3,000 standard options to choose from. These components are selectively heat treated and ground for higher strength compared to competitor units. Single universal joints are best suited for space-constrained applications with angular misalignment up to 45 degrees; double for applications with a wide distance between shafts or those in need of extreme angular misalignment accommodation up to 90 degrees. Can be equipped with nitrile boot covers for abrasion and oil resistance.
Learn more.


NASA partners with Xometry to fast-track critical life support systems on the ISS

Xometry was chosen to help produce mission-critical parts for NASA's Environmental Control and Life Support Systems team at the Marshall Space Flight Center. This video features air purification units designed by NASA engineers and manufactured with Xometry's large-format CNC machining capabilities. Watch to see how Xometry and NASA overcame challenges to build spaceworthy parts for the International Space Station (ISS).
View the video.


Sealing fasteners can optimize your designs

Highly specialized sealing fasteners include sealing screws, sealing nuts, sealing bolts, and sealing washers. Unlike ordinary fasteners, sealing fasteners are configured with a rubber O-ring (or a rubber element) that, when squeezed, permanently seals out a wide range of contaminants from entering and damaging equipment while preventing leakage of toxins into the environment. ZAGO sealing fasteners are designed to withstand harsh weather and extreme temperatures and are vibration and pressure resistant.
Learn all about ZAGO's wide selection of sealing fasteners.


Case studies demonstrate Xometry's CNC capabilities

Xometry's comprehensive CNC machining service empowers engineers, designers, and entrepreneurs around the world. Check out some of their recent CNC machining case studies to see what new heights you can reach with Xometry's help. Examples include NASA life support systems, a robotic BattleBot, and air-purifying respirator parts.
Check out the Xometry case studies.


Scientists craft living human skin for robots

In a culture medium, a robotic finger is covered with human living skin that gained a self-healing property after researchers covered a wound on it with a collagen sheet. [Credit: Shoji Takeuchi]

 

 

From action heroes to villainous assassins, biohybrid robots made of both living and artificial materials have been at the center of many sci-fi fantasies, inspiring today's robotic innovations. It's still a long way until human-like robots walk among us in our daily lives, but scientists from Japan are bringing us one step closer by crafting living human skin on robots. The method developed, presented June 9 in the journal Matter, not only gave a robotic finger skin-like texture, but also water-repellent and self-healing functions.

"The finger looks slightly 'sweaty' straight out of the culture medium," says first author Shoji Takeuchi, a professor at the University of Tokyo, Japan. "Since the finger is driven by an electric motor, it is also interesting to hear the clicking sounds of the motor in harmony with a finger that looks just like a real one."

Looking "real" like a human is one of the top priorities for humanoid robots that are sometimes tasked to interact with humans in healthcare and service industries. A human-like appearance can improve communication efficiency and evoke likability. While current silicone skin made for robots can mimic human appearance, it falls short when it comes to delicate textures like wrinkles and lacks skin-specific functions. Attempts at fabricating living skin sheets to cover robots have also had limited success, since it's challenging to conform them to dynamic objects with uneven surfaces.

"With that method, you have to have the hands of a skilled artisan who can cut and tailor the skin sheets," says Takeuchi. "To efficiently cover surfaces with skin cells, we established a tissue molding method to directly mold skin tissue around the robot, which resulted in a seamless skin coverage on a robotic finger."

To craft the skin, the team first submerged the robotic finger in a cylinder filled with a solution of collagen and human dermal fibroblasts, the two main components that make up the skin's connective tissues. Takeuchi says the study's success lies within the natural shrinking tendency of this collagen and fibroblast mixture, which shrank and tightly conformed to the finger. Like paint primers, this layer provided a uniform foundation for the next coat of cells -- human epidermal keratinocytes -- to stick to. These cells make up 90% of the outermost layer of skin, giving the robot a skin-like texture and moisture-retaining barrier properties.

Researchers at the University of Tokyo developed a method to cover a robotic finger with living human cells. [Credit: Matter/Kawai et al]

 

 

The crafted skin had enough strength and elasticity to bear the dynamic movements as the robotic finger curled and stretched. The outermost layer was thick enough to be lifted with tweezers, and it repelled water, which provides various advantages in performing specific tasks like handling electrostatically charged tiny polystyrene foam, a material often used in packaging. When wounded, the crafted skin could even self-heal like human skin with the help of a collagen bandage, which gradually morphed into the skin and withstood repeated joint movements.

"We are surprised by how well the skin tissue conforms to the robot's surface," says Takeuchi. "But this work is just the first step toward creating robots covered with living skin." The developed skin is much weaker than natural skin and can't survive long without constant nutrient supply and waste removal. Next, Takeuchi and his team plan to address those issues and incorporate more sophisticated functional structures within the skin, such as sensory neurons, hair follicles, nails, and sweat glands.

"I think living skin is the ultimate solution to give robots the look and touch of living creatures," says Takeuchi.

Source: Cell Press

Published June 2022

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