APPLICATION TECHNOLOGY
TaTrim enhances wheel nut security
Ferodom s.r.o and security of bolted joints have long been synonymous and a symbol of progress in fastener technology.
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wards at Fastener Fair Stuttgart and in Fastener Technology International, as well as in professional journals in Europe, USA, Turkey, Russia and in Taiwan confirm it.
Ferodom has now brought to market the new FEM optimalised
locking system TaTrim. This is not only a clear indicator of nut location but also an effective, simple and inexpensive resister of spontaneous self-loosening of bolted joints. It is inserted manually, without special tools, on the tightened nut or bolt head, then pushed to the support or face to face to finish. TaTrim minimises the risk of dangerous self-loosening of bolted joints. TaTrim’s locking effect was tested on the axial pulsator EDYZ
(M20, frequency 4.6Hz, amplitude 0.4mm, variable axial force 1.5kN – 11kN) and compared with the DIN 934 nuts. Ferodom highlights that while the bolted joints with the normal nut had
already relaxed with 2 million cycles, the nuts fitted with TaTrim showed no evidence of loosening even after 10 million cycles. Testing for radial vibration using Junkers equipment also gave excellent results. Typical applications for TaTrim are Renault or Iveco trucks
with M22 x 1.5 wheel nuts but the system is applicable to other trucks and trailers. The product can also be used in in a wide range of other applications, including buses, tractors, rail transportation, machinery, and cranes. “TaTrim’s contrasting colour is highly visible making for
easy control and is, therefore, appreciated by truck drivers. It is recognised that the first 100Km after reinstallation of a wheel are critical and statistics demonstrate there have been many cases of wheels loosening during driving, often with tragic results. Fitting TaTrim ensures greater attention is paid to wheel security.”
NORMA Group composes engine sound
On behalf of a sports car manufacturer NORMA Group AG, a global market and technology leader for engineered joining technology, has developed its first pipe system designed to transmit engine sounds.
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rivers of a new upgrade edition of a sports car due to be launched on the German market in the spring will actually be able to hear the high engine power although modern technology and insulation typically shield passengers from engine noises even with high performance. The sound tube will meet a sports car driver’s desire to listen to the engine working, thus enjoying the added muscle of the car whenever they like. The specifically designed NORMAFLUID sound system is an acoustic application that amplifies the sounds of an
Hall: 21 Stand: D52
eight-cylinder engine via a so-called Sound Symposer. Plastic tubes serve as acoustic channels of the exhaust system transmitting the sound from the engine into the cabin. These pipe systems contain membranes and controllable valves that can be activated or deactivated to experience the engine sound by the push of a button located on the centre unit. Werner Deggim, CEO of NORMA Group, says: “Developing engine-sound pipe systems for sports cars has been an exciting
challenge. This is the first time we are using our joining technology for transporting sounds - instead of fluids and gases. We look forward to developing this product further going forward as we have already received requests for additional models.”
www.normagroup.com
Specialised PEMSERTER® PennEngineering says that its specialised PEMSERTER®
time and money. This can be accomplished using manual tooling or automatically with in-die equipment. Using this method, PEM Type S nuts with thread sizes ¼-20, -18, M6, and M8 and with a two shank length can be installed
W 5/16
successfully in aluminium sheets. Sheets must be between 0.059 inches /1.5mm and 0.79 inches/ 2mm in thickness and no harder than HB 79.7 (HRB 40). When in-die equipment
hen used properly and meeting key application criteria, the tooling and fastener will pierce the mounting hole during the fastener installation process and yield associated savings in production
tooling tooling introduces a newly developed
capability to install PEM® Type S self-clinching nuts permanently in thin aluminium sheets, without the usual need to pre-punch a mounting hole in a separate operation.
is not used, a fixture, template, or other location device is recommended to ensure that the fastener is consistently located in the proper position on the sheet. PennEngineering highlights that the engineering of the new
tooling integrates a special modified punch and anvil to deliver the benefits. A ‘raised ring’ on the anvil allows the fastener to pierce its own mounting hole and then assists in the final clinching process. The feature also creates an embossment in the panel allowing sub-flush fastener installation on the shank side of the sheet and contributing ultimately to a clean installation.
140 Fastener + Fixing Magazine • Issue 74 March 2012
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