SEP 2018


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NEWS 63 His company is also developing inline inspection. "We will have a thermographic cell just after the induction welding head and check the weld using live thermography," says Raynal. Van Tooren is also pursuing in-situ process monitoring and inspection, but using fiber-optic sensors, including the ODiSI system from Luna (Roanoke, VA, US), which provides more than 1,000 sensor points per meter. TPRC and van Tooren each have ongoing projects to develop inline process control for induction welding of large, curved struc- tures and varying thicknesses, including ply buildups and drop-offs in stringers. Van Tooren is also developing induction welding under a vacuum bag. "It becomes like soft tooling for compression of the two surfaces being welded," he says, and is currently aimed at potential repair applications (see Learn More). Van Engelen's list of KVE future developments also includes TPC repair, induction welding of glass fiber TPCs, nonaerospace applications and flux concentra- tors. "We are developing reflective materials to concentrate the CW senior editor Ginger Gardiner has an engineering/ materials background and more than 20 years of experience in the composites industry. Read this article online | Read more online about Fokker's production of welded TPC structures | Read about qualification of TPC welding in the CW Blog | electromagnetic field at the weldline," he explains. "You want to put the energy here instead of at the part's outer surface. With these flux concentrators, you direct the energy, similar to how you direct fiber where you want, using automated placement." "We are still developing all of the welding technologies," Offringa sums up, "and exploring new ones. Most importantly, we don't think there is a single technology with the most promise, but that each has its place." Wijskamp notes that with the recent Clean Sky 2 calls for proposals, it has become clear that Airbus wants to use welded TPCs in large airframe structures. "But we have seen this already in our 19 partners that have joined since 2009," he adds. Van Tooren believes that a welded, fastenerless, large compo- nent, if not a full fuselage, is within reach. "Preferably, on the Boeing New Midsize Airplane, but definitely the next aircraft." Welding Thermoplastics WHAT YOU VALUE MOST, WE'LL GET YOU MORE OF. LIGHTER. STRONGER. FASTER. TOUGHER. LOWER-COST. Our braiding and overbraiding technologies can produce most complex parts in near-net-shape form with dramatic improvement in the performance measure that means the most to you. Learn how today at VISIT OUR BOOTH AT THESE UPCOMING SHOWS: SPE Automotive Composites, Sept. 5-7: Booth 416 CAMX 2018 Exposition, Oct. 16-18: Booth J37 129 Business Park Drive, Statesville, NC 28677 • 1-704-924-3090

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