February 15, 2022 Volume 18 Issue 07

Mechanical News & Products

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10 design tips for sheet metal bending from Xometry

Sheet metal bending is one of the most commonly used methods to form sheet metal fabricated parts. The costs and quality depend on various factors, including setup costs, material costs, and design complexity. To ensure an optimum bend and to avoid deformation, the experts at Xometry recommend following certain design tips for every type of sheet metal part feature.
View this informative Xometry video.


CNC: Reduce runout with ANCA's new complete tool runout compensation

Manufacturing high-quality, high-performance tools requires the Total Indicator Runout (TIR) to be perfect or minimal for overall tool life and surface finish. Runout can cause shortened tool life and poor surface finish, and in drills and reamers can result in oversized holes. A new option in ANCA's ToolRoom cures runout woes and helps to increase tool life and productivity.
Read the full article.


Fluke 831 Laser Shaft Alignment Tool

Misalignment causes at least half of all damage to rotating machinery, but instead of fixing the problem, teams often just treat the symptoms by replacing bearings, couplings, and seals. The new Fluke 831 Laser Shaft Alignment Tool makes shaft alignment easy with an intuitive guided user interface that enables quick and complete shaft alignment without advanced training or complicated programs.
Learn more.


Flame-resistant composites for EV applications

IDI Composites International has introduced a new thermoset composite material delivering critical performance benefits for electric vehicle (EV) applications, FLAMEVEX™ is a flame-resistant lightweight composite that has been used on battery packs, which have passed the stringent Chinese Standard GB/T 31467.3 test, commonly known as the China bonfire test. This material offers designers a strong, lightweight, and cost-effective alternative to steel and aluminum materials traditionally used to enclose battery packs in EV applications. Flame performance levels can be tailored.
Learn more.


New high-performance hollow shaft gear unit for heavy-duty applications

Harmonic Drive has released its HPF series of hollow shaft gear units designed for heavy-duty industrial applications. These advanced gear units offer high torque outputs and flexible installation options, and they provide exceptional torque density and positional accuracy. Industrial applications include robotics, packaging, and material handling.
Learn more and get all the specs.


Electrically insulative toughened epoxy meets NASA low outgassing specifications

Master Bond Supreme 42HT-2ND Black is a two-part, non-drip epoxy system designed for bonding, sealing, and coating applications. It is capable of withstanding temps up to 450 F (232 C), meets NASA low outgassing standards, and is recommended for applications that require vacuum compatibility. This epoxy is electrically insulative and withstands rigorous thermal cycling. It offers a high strength profile and a forgiving mix ratio.
Learn more.


High-end precision guide rollers -- new design

Guide rollers may seem like simple, standard parts, but these rollers with ball bearings are in exceptionally high demand. JW Winco has expanded its guide roller offering to include the standard part GN 753.1. With its entirely new design, these guide rollers have a special deep groove ball bearing of hardened roller bearing steel. They are available in six sizes, from 0.866 to 1.969 in. (22 to 50 mm) outer diameter. The bearing features permanent lubrication and a typical 2Z seal to protect against dust and dirt (in other words, the bearing is covered on both sides by metal disks).
Learn more from JW Winco.


VariBlast Precision Safety Air Gun is the People's Choice

EXAIR's VariBlast® Precision Safety Air Gun has won the 2022 People's Choice award from Professional Tool and Equipment News (PTEN). These safety air guns provide a focused blast of air capable of handling tough jobs with remarkable strength while minimizing air consumption and noise. This OSHA-safe air gun employs an engineered, full-finger, variable-flow trigger. The VariBlast is available with a standard 12- or 20-in. extension that can also be outfitted with type 316 stainless steel or PEEK thermoplastic air nozzles for non-marring applications.
Learn more.


Stacked conveyor system supercharges tea company production

Watch how Bosch Rexroth's VarioFlow plus conveyor system, designed using a stacked configuration, moves products smoothly and quickly within a narrow footprint at the Yamamotoyama of America tea company in Pomona, CA. The facility operates multiple tea bag manufacturing and carton machines, each of which can produce 300 tea bags (which is 18 full cartons of tea bags) per minute. VarioFlow plus is a flexible, modular plastic chain conveyor system used for moving high-volume packaged goods. The solution has been a huge success for the facility, increasing production speed without damaging products.
View the video.


New sizes: SureFrame cut-to-length T-slotted rails

Automation-Direct has added new 30 x 60 mm and 60 x 60 mm profiles to its SureFrame 30 Series lineup of cut-to-length T-slotted extruded aluminum rails. These structures are lightweight, economical, versatile, and easy to construct, with uses ranging from stands that hold barcode scanners and label applicators to OEM machines made entirely of T-slotted aluminum rail. The rails are available in the most popular profiles and dimensions, are compatible with many other brands, and can be cut to your specified lengths in increments of 0.001 in. with no cutting fees.
Learn more.


Siemens offers Virtual Product Expert for CNC

Siemens has introduced the Virtual Product Expert (VPE), a new online support program for its CNC machine tool users, machine builders, dealers, and importers. Through the VPE program, customers can interact directly with a SINUMERIK CNC product expert and have their specific operation and programming questions answered, from the basic functions of the control to the most advanced machining technology aspects of the hardware and software suites. Best of all, this service is offered to all Siemens CNC community members at no cost.
Learn more.


Create your perfect parts: Xometry Manufacturing Design Guides

Need to order parts and get it right the first time? Xometry provides more than 17 manufacturing processes, including CNC machining, 3D printing, injection molding, sheet cutting, and more. Get in-depth design-for-manufacturing tips, specs, and best practices for Xometry's services. Optimize your designs, reduce manufacturing time, and lower your costs. Case studies available too.
View the Xometry Manufacturing Design Guides.


How slip clutches can help maximize your designs

The way they see it over at Polyclutch, there aren't a whole lot of problems you can't solve with a slip clutch. Way beyond using them for overload protection, there are a surprising number of other applications for these versatile and valuable components. From increasing machine speeds and applying constant tension on wire to indexing a conveyor and automatic screw assembly, slip clutches just may provide the design leverage you've been seeking.
Read the full article.


New high-performance metals for 3D printing

3D Systems has added two new materials to its materials portfolio. Certified HX is a high-performance nickel alloy that contains a higher percentage of molybdenum (up to 9.5%) vs. other nickel alloys, which enhances strength and resistance to corrosion, creep deformation, cracking, and oxidation in hot-zone environments. Certified CuCr2.4 is a high-strength, corrosion-resistant copper alloy that is significantly stronger than pure copper and easier to process. Both materials are certified for use with the company's DMP Flex 350 and DMP Factory 350 3D printers. Applications include industrial gas turbines, consumer goods, aerospace and defense, and automotive.
Learn more.


COMSOL Multiphysics Version 6.1 is here!

COMSOL has released the latest version of its modeling and simulation software. COMSOL Multiphysics version 6.1 is full of feature additions and workflow enhancements. "This version provides our users with powerful multiphysics simulation tools in areas of highly competitive R&D, like audio technology and vehicle electrification," says Bjorn Sjodin, VP of product management at COMSOL. "We have also strengthened the software's foundation with new capabilities for optimization and the modeling of turbulent flow and mechanical contact."
Learn more.


Scientists investigate where special metal alloys get their strength

This transmission electron microscopy image shows clustered atoms in aged chromium-cobalt-nickel, a medium entropy alloy. [Image credit: Lawrence Berkeley National Laboratory]

 

 

Metal alloys are materials that contain two or more atomic metal elements. They often have one primary element and smaller amounts of other elements. Scientists recently discovered a new class of alloys that have several elements combined in equal amounts. Researchers call these materials "medium entropy alloys."

These alloys are very strong, but researchers did not fully understand the reasons for this strength. When the alloys are examined in a conventional microscope, the atoms from the different elements seem to be uniformly distributed in the material. However, when examined in a high-resolution microscope, scientists observed unexpected clustering of the atoms. These atomic-scale clusters are the source of the alloys' high strength.

Scientists are extremely interested in understanding why medium entropy alloys are so strong and ductile. New research conducted at the Lawrence Berkeley National Laboratory observed a compositional non-uniformity at the atomic level of the atoms in a medium entropy alloy. The researchers showed that this clustering structure is responsible for the alloy's behavior. This new understanding might allow researchers to design advanced structural materials with targeted properties.

Medium entropy alloys are metal alloys with three or more elements, generally with the three elements combined in approximately equal proportion and mostly "solid solution" (homogeneous structure that is all one phase). Until now, scientists did not fully understand the source of their unusual mechanical properties. Microscopic studies of the materials did not show anything out of the ordinary.

Recently, though, scientists used the high-resolution transmission electron microscopy at the Molecular Foundry, a Department of Energy user facility, to image the structure of the alloy with atomic-level resolution. An analysis of the images showed that, although the three elements initially appeared to be randomly mixed, some elements were grouped together in very small clusters of just a few atoms. This is termed "short range order" (SRO).

The scientists determined that the degree of SRO could be manipulated through thermal treatments of the alloy. Mechanical testing showed a clear correlation between the strength of the alloy and the degree of SRO. Researchers can use this new understanding of the relationship between microstructures and their mechanical behavior to design new alloys with targeted mechanical properties.

Want more details? See "Short-range order and its impact on the CrCoNi medium-entropy alloy" published in Nature.

Source: Lawrence Berkeley National Laboratory

Published February 2022

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