Cutting corners

Article Abstract:

Waterjet cutting employs a high pressure jet of water directed by a nozzle which is only a fraction of a millimeter in diameter. The addition of abrasives to the water used allows the cutting of almost any material. Waterjet cutting is applied in the vehicle manufacturing industry because of its versatility and the different kinds of problems which it can solve. The Scania Trucks plant at Oskarshamm, Sweden employs a robotic waterjet cutting system for cutting interior wall panels for driver cabs on new Scania trucks.

Truck industry, Product information, Equipment and supplies, Machinery industry

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Cutting a link

Article Abstract:

Composites often cannot be machined using traditional tools and methods. A LINK project on the problem, begun in Feb 1990, is near completion. Pera International has managed the 400,000 pound sterling, three-year project. Standard twist drills seem to work well, given a stiff enough back-up for tool breakthrough. Radially split saws giving intermittent cuts also do well. Delamination, overheating, splitting and tool damage are the main concerns.

Composite materials, Machining

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In-flight cocktail

Article Abstract:

The US armed forces' F-22 fighter features a combination advanced materials that provides optimum balance between cost and weight. Titanium alloys are used in most parts of the aircraft due to its high strength-to-weight ratio and heat resistant qualities with the remainder made up of aluminum, steel and other materials. Titanium also accounts for one-third of the F-22's total weight while plastic-based composites account for about 27%.

Evaluation, Fighter planes, Materials, Airframes, F/A-22 (Aircraft)

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