High-Performance Composites is read by qualified composites industry professionals in the fields of continuous carbon fiber and other high-performance composites as well as the associated end-markets of aerospace, military, and automotive.
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Center of Gravity Acceleration Effects Suspension Movement Always innovating For its advanced Pivot System, BMC analyzed the inertial loads that compress the suspension unit���s shock-absorbing system and used the data to precisely locate the system���s pivot points, such that it enables the chain tension to compensate for the acceleration effect. Thus, more of the rider���s energy is converted into propulsion with less energy loss while maintaining optimal rider comfort and tire traction. Instant Balance Center Power Zones Source: BMC Source: BMC Tube production begins with a mandrel, referred to by BMC as the ���soul.��� Previously aluminum, it is now a glass-���ber composite. ���The soul,��� says Kaenzig, ���is the skeletal center of the mandrel. It does not have any geometry features.��� The tube���s geometry is, instead, shaped into a silicone overlay that BMC calls the ���core.��� As will be made clear, the twostage construction permits easy mandrel extraction. And because the resin won���t adhere to silicone, the core provides its own mold release, saving a process step. The soul/core is ���tted into a workpiece carrier that will enable mandrel transport, by means of specialized industrial robots, through computer-controlled and individually sealed braiding, molding, trimming, painting and assembly work cells, which are separated by automated guillotine doors. Each carrier contains a digital tag with its identi���cation number and programs that activate and control each machine as it moves through the process stages. The computerized system also commands the handling robots and records relevant data for each workpiece. Thus, each tube is made-to-measure per speci���cation, with accuracy veri���ed within 0.1 mm (4 mils). As processing begins, a robotic arm removes the workpiece carrier from the production line���s shuttle and feeds it into a radial braiding machine made by August Herzog Maschinenfabrik GmbH & Co. KG (Oldenburg, Germany). The data matrix for the part is read from the workpiece digital tag, and the braider draws carbon ���ber tow supplied by Toho Tenax Europe GmbH (Wuppertal, Germany) from more than 100 bobbins as it begins weaving it along sinusoidal paths to produce a seamless braided tube or sleeve on the mandrel. The mandrel shape and rate of advance in the radial braider determines the density and arrangement of the carbon tows. When the braid is complete, robots cut the sleeve free, withdraw the workpiece carrier from the braider and replace it in the shuttle, which then proceeds to the RTM cell. BMC claims theirs is the ���rst fully automated composites RTM station in the world. A robotic arm transfers and locates the braided sleeve into a corresponding female matched metal mold, which is made from hot-formed steel. A special two-component nano-toughened Tuned tubes and carefully crafted connectors Tubes shape and cross section varied to optimize loadbearing requirements Belastungsgerechte Rohrformen per frame location Optimierte Kraft��bertragung The impec���s two main technologies are braided carbon fiber tubes made using the Load Specific Weave (LSW) process and injection molded carbon fiber Shell node Concept (SnC) connectors. S Connector nodes formed as half shells Interiors ribbed for accurate tube location (Step 5) Das shell node concepte erlaubt eine pr��zise Kontrolle der Verbindungselemente innen und aussen de���nierten Kraft���uss HT Stiffness Unterrohr nahe dem Steuerrohr Querschnitten Das Rohrpro���l ist h��her als breit f��r eine hohe Lenkkopfstei���gkeit Constant fber angle Querschnitt Optimum stiffness angle BB Stiffness Optimierte Biegestei���gkeit Variable Querschnitt cross section Unterrohr nahe dem Tretlager Das Rohrpro���l ist breiter als hoch f��r eine grosse Tretlagerstei���gkeit Trouble-free transition Nahtloser ��bergang CS Stiffness Left half Kettenstreben Das Rohrpro���l ist optimiert f��r beste Kraft��bertragung Right half Constant fber angle remains throughout transition Optimierte Torsionsstei���gkeit Optimum angle for torisonal strength january 2013 | 35