APPLICATION TECHNOLOGY
Lesjöfors moves into the fast lane
In close cooperation with Öhlins racing, Lesjöfors has designed innovative chassis springs to the dampers of the newly released Lamborghini Aventador.
L
amborghini Aventador is a brand new sports car model characterised by modern design and lightweight technology. The 6.5 litre V12 motor gives an effect of 700bhp and the Aventador achieves 0-100km/h in 2.9 seconds. Top speed is 350km/h and the price estimates to about 3 million SEK (324,000 euros).
Innovative chassis springs for dampers The chassis springs give the car good driving qualities at the same time as they manage the loads that are transferred from the
wheels into the car. The Aventador also has a new type of lifting system for levelling of the front of the car that puts extra demands on the springs. Lesjöfors has in a close cooperation with Öhlins Racing designed two types of springs with different rigidity, one front spring and one back spring, that live up to the Volkswagen Group´s high demands for the Aventador´s shock absorption system. In the coil over dampers used in the Aventador, the springs are placed on the outside of the damper. The spring is an open, uncut spring with an unusual end fitting. A shim in rubber is placed between the spring and the spring seat to avoid noise. Manufacturing is carried out at the factory in Lesjöfors, Sweden.
Cooperation with extreme demands A comprehensive, 28 page demand specification was the base for design and
testing of the chassis springs. Construction and testing were carried out during 2.5 years in close teamwork with Öhlins. Among others, wide-ranging tests to verify the springs fatigue strength and the corrosion resistance of the surface treatment were carried out. At some stages, extreme short manufacturing processes and deliveries were required, with Lesjöfors living up to the high standards. “We are highly satisfied with our cooperation with Lesjöfors. Quick responses and innovative problem solving are qualities we have experienced and appreciated much in our contacts with the company,” commented Rade Catovic, project manager for the Lamborghini damper at Öhlins Racing.
ITW Plexus co-exhibits with ITW WindGroup
ITW Plexus, a European structural adhesives manufacturer, once again exhibited at JEC Composites in Paris and this year the company shared its stand with its newly formed wind energy group, known as ITW WindGroup.
T 98
he recently formed ITW WindGroup manufactures and supplies adhesives, tapes, sealants, foundation systems, coatings, and other solutions to the wind energy market. These products provide the wind industry with
solutions for blade assembly, maintenance and repair, tower manufacturing and assembly, and nacelle and hub assembly. At the show Plexus also highlighted the benefits and
savings that major transportation, marine, automotive and engineered construction manufacturers are achieving by using the company’s latest high performance range of methacrylate adhesives to bond many dissimilar materials. Plexus explained to visitors how its adhesives are facilitating faster and easier
Fastener + Fixing Magazine • Issue 69 May 2011
assembly, and produce durable high-strength bonds to virtually all resins and gel coats, as well as most thermoplastics and metals. An example is in boat building applications where there are
problems caused by having wood beneath the water line. Plexus says it has eliminated these problems by introducing composite stringer and liner assemblies. Also, unlike marine putties, Plexus adhesives chemically fuse FRP and composites. They produce bonds so strong that the substrates will delaminate before the bond fails. Plexus also points out that because its adhesives eliminate surface preparation and cure rapidly at room temperature, they dramatically simplify and shorten assembly times, taking cost out of the finished product.
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