September 20, 2016 Volume 12 Issue 35

Mechanical News & Products

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New 3D-printing resin creates static-dissipative parts

The new xESD resin from Nexa3D, a leading maker of ultrafast professional and industrial polymer 3D printers, is a rigid photoplastic material with a stable carbon nanotube dispersion that delivers optimal static-dissipative performance and isotropic mechanical properties, which are required by the electronics manufacturing industry. The xESD resin allows users to create custom jigs, fixtures, grippers, assembly aides, and enclosures in hours without the risk of ESD damage to high-value electronic components. Available for NXE Pro series printers and the XiP desktop 3D printer.
View the video and learn what else is new from Nexa3D.


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.


Next-gen controlled pneumatics from Festo

Festo's controlled pneumatics combines proportional technology, sensors, and control algorithms to form a control loop. These are mechatronic pneumatic systems with innovative valve and communication technologies that enable digital influence in conjunction with closed-loop control based on a sensor variable. This creates new areas of application, especially for pressure and flow control. Learn about digitized pneumatics in tire manufacturing and how piezo technology increases valve life in wafer manufacturing.
Read the full Festo applications article.


Standard parts in hygienic design from JW Wico

JW Winco has developed a complete product family of special standard parts that combine minimal contamination tendency with optimum cleaning ability to meet the highest sanitary standards. The new GN 6226 spacers, which avoid duplicate mounting surfaces, join the existing range of knobs, U-handles, hand levers, indexing plungers, latches, cover sleeves, leveling feet, and screws. In all cases, stainless steel with vibratory finished or polished surfaces is used as the material.
Learn more.


Small valves prevent big blowups

Smart Products USA says their best example of a true relief valve can be found in Models #103 and #109. Available as a 1/8" Male NPT style, these valves are easily placed into plastic, metal, or other materials with absolutely no tubing involved. While the majority of the company's valves function as both a check and pressure-relief flow control option, Models #103 and #109 are more suited to only relieve pressure. When pressure builds to a designated PSI level, this spring-loaded valve responds and allows flow of liquids/gasses slowly to prevent blowups or damage.
Learn more.


Great Resources: EXAIR Case Study Library

Learn how EXAIR compressed air-operated products improved production rates, lowered defects, increased safety, and provided quick ROI. Each of the more than 40 studies includes an application goal, the process problems before EXAIR, and the final improvements achieved. EXAIR's real-world gains include dollars saved, SCFM saved, decibels lowered, quality improvements, and more.
Check out the case study library.


New igus polymer spherical ball strengthens food safety

To make food-processing facilities and machinery even safer, igus, the Germany-based manufacturer of motion plastics, has launched a new standard in the form of the high-performance plastic iglide A181 as a spherical ball material for the igubal Food Contact (FC) joint system. Moving on stainless steel shafts, the spherical cap is three times more wear resistant than the previous version made from iglide FC180. It also costs 25% less and is self-lubricating, maintenance-free, and FDA and EU 10/2011 compliant.
Learn more.


Photo-chemical etching: What design engineers need to know

Dr. Angel Lopez, director of Business Development at micrometal GmbH, one of Europe's leading photo-chemical etching providers, discusses what considerations design engineers need to bear in mind when working with this versatile and sophisticated metal machining technology that produces complex and feature-rich metal parts and components that are burr and stress free.
Read the full article.


Honing a life-saver for aerospace component maker

Fuse pins are designed to hold a jet engine on a wing, but to break away in emergency situations, allowing the engine to separate from the wing to prevent catastrophic structural failure and fires. Learn how Sonic Industries relies on Sunnen's SV-1000 honing system to produce the 5- to 7-micron ID tolerance and proprietary finish critical to this part's performance. The CNC-controlled SV-1000 allowed Sonic to meet ramped-up customer demand when it replaced a manual honing system, decreasing cycle times dramatically and increasing part production.
Read the Sunnen case study.


Adhesives for titanium: Lap shear strength tests

When it comes to bonding titanium to itself or to other substrates, Master Bond has formulated a range of reliable, high-strength adhesives that yielded excellent results when tested for their lap shear strength using titanium substrates. Titanium is known for its high strength, corrosion resistance, and heat transfer properties. See the results of which epoxies performed the best when also considering different processing and operation conditions.
Read the Master Bond results.


One Touch Fasteners slash set-up times

Quick-release One Touch Fasteners from Fixtureworks provide quick and easy locking and unlocking for fixture plates, covers, machine components, and more. These quarter-turn clamping fasteners have clearly visible ON and OFF markings and are ideal for fast-changeover applications and frequent disassembly, providing reliable hold up to 100 lb. Lots of versions available, including standard, retractable, heavy duty, and knob- and button-locking pins.
Learn more and see case study examples.


Desktop Metal qualifies nickel alloy Inconel 625 for 3D printing on Studio System 2

3D-printer maker Desktop Metal has qualified the use of the nickel alloy Inconel 625 (IN625) for its Studio System, an office-friendly metal additive manufacturing system that prints high-performance metal parts in low volumes for pre-production and end-use applications. IN625 is a high-performance alloy known for high levels of strength, temperature resistance, and corrosion resistance.
Read the full article.


6 advanced FDM 3D-printing tips when adding metal parts to your build

Fused Deposition Modeling (FDM) 3D-printing machines use thermoplastic resins and strong, tough materials for real applications. Learn from the experts at TriMech how to prepare for incorporating metal parts such as bushings, hex nuts, roller chain, and rods into FDM builds to create complicated parts that need to stand up to repeated use.
View the TriMech video.


Electromagnetic interference O-rings case study

Specialty Silicone Products (SSP) recently supplied hot vulcanized EMI (electromag-netic interference) O-rings to a company that needed to replace EMI gaskets that had failed EMC testing. EMI O-rings made of electrically conductive silicones combine reliable environmental sealing and broad temperature resistance with proven levels of shielding against EMI. Learn how hot vulcanizing with a conductive adhesive, the joining process that SSP uses, eliminates EMI leakage and a "hard spot" where ends are joined using a non-conductive adhesive.
Read this informative SSP case study.


5 new manufacturing options from Xometry

Get the parts you need made fast and at a great price. Xometry has added five new manufacturing options to their quoting engine: Die Casting, Metal Extrusion, Metal Stamping, Laser Tube Cutting, and Tube Bending. Experts will manually quote these options and work closely with you to ensure the best outcome and success. Get your quote today, and get started on your next metal production order.
Learn more.


Army's next-gen hand grenade comes with options -- just hit the switch

By Eric Kowal, Picatinny Arsenal

The first new lethal hand grenade in more than 40 years is designed to give greater flexibility to the warfighter. [Photo Credit: U.S. Army]

 

 

Engineers at Picatinny Arsenal in New Jersey are working on the first new type of lethal hand grenade in more than 40 years, which is designed to give greater flexibility to the warfighter.

The multi-purpose hand grenade design will provide both fragmentation and blast overpressure more effectively and safely than its legacy counterparts. Once fielded, Soldiers will be able to select and use a hand grenade with different effects simply by flipping a switch.

Over the past five years, Picatinny engineers have been collaborating with Infantry School representatives, hand grenade cadre, as well as active-duty Soldiers and Marines, to determine warfighter needs regarding hand grenades.

American warfighters lost the capability of using an alternate lethal hand grenade when the MK3A2 concussion grenade was taken out of service in 1975 due to an asbestos hazard, leaving the M67 fragmentation grenade.

The grenade development at Picatinny is being performed by engineers with the U.S. Army Armament Research, Development and Engineering Center, or ARDEC.

Science and technology funding has allowed ARDEC to spearhead the design effort to develop the Enhanced Tactical Multi-Purpose (ET-MP) hand grenade, the Army's next-generation lethal hand grenade. The grenade will be designed to meet performance requirements necessary for close combat engagements in which the effects must be lethal.

ARDEC is working in cooperation with the Maneuver Center of Excellence at Fort Benning, and the Program Manager for Close Combat Systems, to insert critical technologies with Soldier-centric designs to improve safety and ease of use.

Soldiers, Marines, and engineers gather to evaluate and down-select various grenade body and arming designs. Photo by Herbert Wortmann. [Photo Credit: U.S. Army]

 

 

According to Jessica Perciballi, ARDEC Project Officer for ET-MP, U.S. Army, Grenades & Demolitions Division, ET-MP represents the first hand grenade that can be tailored to the mission.

"Soldiers will not need to carry as many types of hand grenades," she said.

"They are currently carrying one M67 grenade that provides lethal fragmentation effects. With the new multi-purpose grenade, they can carry one ET-MP grenade and have the ability to choose either fragmentation or concussive effects desired for the situation," Perciballi said.

Another feature is that the grenades are designed for ambidextrous use, meaning that they can be thrown with either hand. Current grenades require a different arming procedure for left-handed users.

"Not only will ET-MP provide additional capabilities and lethality to the warfighter, it will also be the first Army Fuze Safety Review Board and Insensitive Munition-qualified lethal grenade in the Army's portfolio," Perciballi added.

A Soldier at Fort Benning throws a prototype, inert grenade from the kneeling position. Photo by Herbert Wortmann. [Photo Credit: U.S. Army]

 

 

According to Matthew Hall, Grenades Tech Base Development Lead, "The request for a multi-purpose grenade came from the warfighter in 2010. Research began almost immediately. The science and technology funding to move forward with a project came in fiscal year 2013."

"We received direct input from the Army and Marine Corps early on, which was critical in ensuring the new arming and fuzing design was user friendly," Hall said.

"With these upgrades in the ET-MP, not only is the fuze timing completely electronic, but the detonation train is also out of line," Hall added. "Detonation time can now be narrowed down into milliseconds, and until armed, the hand grenade will not be able to detonate."

According to Hall, the current plan for ET-MP is to transition the new grenades to Project Manager Close Combat Systems in Fiscal Year 2020. That organization is also located at Picatinny Arsenal.

Published September 2016

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