December 04, 2018 Volume 14 Issue 45

Mechanical News & Products

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How to choose the best online CNC machine shop

Sourcing professionals, engineers, and designers alike need to have parts produced through technologies like CNC machining, turning, and milling. In development, the requirements may be loose to get a product validated. And in production, the expectation is that parts are made consistently, on time, and to specifications. But it is sometimes difficult to navigate through all the Internet searches and buzzwords to determine the best fit for your needs. Greg Paulsen from Xometry provides a useful guide on what to look for when selecting a machine shop.
Read the Xometry blog.


Hinge Selection Guide online app

The super-helpful Hinge Selection Guide online app from Reell Precision Manufacturing introduces a user-friendly resource to pinpoint ideal hinge and torque insert product solutions matching application requirements. This easily accessible tool opens an interactive window to designate an application's parameters, calculate the torque and rotational angle required for the hinge or torque insert, and ultimately identify the Reell products best suited for the job. The tool also enables users to access Reell's standard catalog products.
Click here to learn more.


How to choose an anti-backlash lead screw nut

Lead screws are the norm for today's linear motion applications, but despite their advantages over competing technologies (i.e., affordability, precision, the ability to design with freedom, reduced maintenance, etc.), lead screw systems do have a certain amount of "play." An important design consideration for utilizing a lead screw is the amount of backlash your system can tolerate and still achieve its goal. The big question is: Which lead screw nut will help you in the battle against backlash? By Christopher Nook, Helix Linear Technologies
Read this informative blog.


First semi-transparent polyamide good for car interior lighting

The BASF product Ultramid Vision has been used in a car interior for the first time. The semi-crystalline polyamide is employed in the window regulator module of a German automobile manufacturer. Compared to opaque standard polyamides, Ultramid Vision displays very high light transmission with low light scattering, which makes it a perfect choice for use with the illuminated symbols on the window regulators and for setting the exterior mirrors. The requirement was to allow as much light to pass through as possible, with high color fidelity.
Learn more.


Spinning flare nuts eliminate loose fasteners in thin metal sheet applications

PEM SFN spinning flare nuts from Penn-Engineering become permanently captivated upon installation in thin metal sheets and, when paired with a self-clinching stud or other fixed externally threaded hardware, can eliminate all loose fasteners (including flange nuts) in attachment applications. These one-piece, flanged hex nuts additionally will spin freely in a sheet enabling quick attachment to mating hardware. Their use ultimately promotes savings in assembly time and costs.
Learn more.


New 3M metal bonding adhesive

3M Scotch-Weld Metal Bonder Acrylic Adhesive DP8407NS delivers strength, corrosion resistance, and reliable performance for bonding metal without extensive surface prep. This high-strength, fast-curing structural adhesive offers high peel and durability, and maintains its strength at temps as low as -40 F. With the ability to bond active metals like steel, copper, brass, and bronze, 3M's Metal Bonder is ideal for a wide range of assemblies in metal fabrication, transportation, specialty vehicle, architectural panels, appliances, and office furniture. It bonds plastics and composites for multi-material bonding and is also well suited for bonding metals prior to powder coating and paint processes.
Click here to learn more.


Using CAD-CAM-CNC to produce aerospace parts

DMG MORI manufactures a wide variety of conventional chip-cutting and ultrasonic machining centers for OEMs and production job shops serving the aerospace industry. On two recent applications, DMG MORI turned to long-time business partner Siemens for assistance. By offering a total package of CAD-CAM-CNC hardware, software, and engineering services, Siemens was able to help this machine builder substantially improve every aspect of part production for a reverse thrust component for a jet engine and an aerospace impeller fan.
Read the full article.


SOLIDWORKS 2020 is here! TriMech recaps launch and runs through best new features

SOLIDWORKS hosted a live streaming event Sept. 18 to introduce the world to SOLIDWORKS 2020. Even if you missed it, you're in luck. The incredibly knowledgeable people over at SOLIDWORKS specialist TriMech have put together a comprehensive rundown of what the new product offers, including a video highlights reel, "Top 10 New Features" infographics, and a prep guide to learn about licensing and such. Learn about all the new "almost magic" tools and enhancements.
Read the TriMech recap blog.


Springs made of high-performance, engineered plastic provide tons of options

Lee Spring's LeeP plastic composite compression springs molded from Ultem resins provide critical advantages over traditional metal alloy springs. They feature high strength-to-weight ratio, no magnetic interference, high corrosion resistance, and dielectric insulation for non-conductive applications. They are stocked in a variety of standard sizes, each available in a "rainbow" of strengths formulated from different Ultem resins. They were designed to meet a wide range of spring applications where non-corroding, non-metallic, inert materials are preferred including medical, aerospace, marine, food prep, pharmaceutical, communications, and more.
Learn more.


Etched and formed micro metal parts

Tech-Etch combines photochemical etching with precision metal bending to create extremely small formed features in thin metal parts. State-of-the-art techniques are used to form features down to .003" in a wide variety of metals. Parts range in thickness from .0005" and up. The result is that engineers get the freedom to design features in thin metal parts with few limitations. While providing quick turnaround and low tooling costs, photo etching produces burr-free parts with intricate and complex shapes. Prototypes can be delivered in five days.
Learn more.


Injection Molding: 9 tips for designing multipart assemblies

Finding creative solutions to multipart assemblies can be tricky, but fortunately there are many different ways to approach product designs that involve multiple components. To keep things cost effective and efficient, simplify your design, don't make what you can buy off the shelf, explore all of your manufacturing options, and understand the rules of each part of the process. But like most design challenges, it's not as easy as it sounds. Great info from Protolabs.
Read the full article.


igus ball transfer units ease move of high loads

igus has introduced new ball transfer units that allow lubrication-free and smooth transport with a dramatic increase in load-bearing capacity. Ball tables are used if delicate or heavy goods are to be transported in different directions. The ball transfer units from igus are manufactured with the high-performance plastic xirodur B180, which absorbs loads up to 500 N (112 lb). The ball transfer units are lubrication and maintenance free. They also include stainless steel balls inside the roller to allow for smooth running. Based in Germany, igus runs its North American operations out of Providence, RI.
Learn more.


Replace traditional fasteners: 50+ retaining ring applications

The benefits of a Rotor Clip Retaining Ring are simple: The ring is made from less material than traditional fasteners, eliminating machined shoulders, threads, cover plates, and heat-formed studs -- so you save. Using a retaining ring to fasten your assembly instead of a traditional fastener not only reduces your costs, but also saves the environment. Fewer parts and less material means cost savings for you and less waste for the planet. This quality part offers lot traceability. Want to know what you can do with a Rotor Clip Retaining Ring?
View more than 50 application examples.


Onshape includes PennEngineering PEM hardware

Onshape, a next-gen cloud CAD and data management platform that speeds up product development, has partnered with PennEngineering, a global leader in the fastening industry, to include PEM hardware as a built-in standard for its 3D CAD models. Onshape will initially include PEM brand self-clinching nuts and self-clinching standoffs, and plans to add additional PennEngineering products to its Standard Content library in the future. PEM fasteners are typically used when a component must be readily replaced and where loose nuts and hardware aren't accessible during the final assembly process. By embedding a threaded nut into a piece of metal mechanically, it saves time and reduces post-manufacturing assembly processes. This efficiency is especially important when producing large quantities of parts.
Learn more.


Problem-Solving Tips: Screw tightening control methods

Although the main role of screws (bolts) is fastening objects using the axial force generated from tightening in actual work, there are many people who control the torque by tightening with a torque wrench, because it is difficult to directly monitor the axial force, and so guarantee the axial force that way. However, there are other methods of control for tightening screws (bolts), such as using "elastic region tightening" and "plastic region tightening."
Read this NBK technical blog.


Researchers find intrinsic 'fingerprints' that could detect tampered steel parts

David Mascarenas, a research and development engineer at Los Alamos National Laboratory, used Barkhausen noise to find unique-looking "fingerprints" in steel that could help to verify weapons treaties and reduce the use of counterfeit bolts in the construction industry.

 

 

 

 

Researchers using magnetic signals have found unique "fingerprints" on steel that could help to verify weapons treaties and reduce the use of counterfeit bolts in the construction industry.

"Magnetic signals provide a wide range of possible national security applications," said David Mascareñas, a research and development engineer at Los Alamos National Laboratory and lead author of the study published recently in the journal Smart Materials and Structures. "It's a promising phenomenon that we hope to leverage to uniquely identify different pieces of artillery."

In the research, funded by the U.S Department of State, researchers applied Barkhausen noise, a magnetic phenomenon, to two types of steel -- conventional steel and an abrasive-resistant type of steel used in mining equipment. A sensor measured electromagnetic signals by repeatedly scanning the different kinds of steel over a period of time. Researchers compared the signals from those two sets of scanned images and found signatures that were instrinsic to each type of steel.

The variations that occur from the production of various kinds of steel are reflected as distinct fingerprints. "They seem to be repeatable," said Mascareñas.

That intrinsic signature could help to discover counterfeit or low-grade steel parts in construction by looking for differences in the electromagnetic signatures. "It could also help solve that big problem in that industry," said Mascareñas.

Future research could involve studying other types of steel and developing a handheld sensor for treaty verification.

Publication: "Barkhausen noise as an intrinsic fingerprint for ferromagnetic components, in Smart Materials and Structures. Authors: David Mascareñas, Michelle Lockhart, Thomas Lienert.

Source: DOE/Los Alamos National Laboratory

Published December 2018

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