Researchers have developed a device which could revolutionize the way cutting, drilling and milling is done in manufacturing.
The tool makes working on difficult-to-cut materials like aerospace-grade composites so easy it is like ‘cutting through butter’.
It involves a technique called ultrasonically-assisted machining (UAM), which uses a specially designed piezoelectric transducer working in tandem with a traditional turning, drilling or milling machine.
The device creates ultrasonic vibrations at anything between 20kHz and 39kHz, and the machining technique makes the composite material so ‘soft’ in the area being worked on that much less force is needed from the cutting tool, resulting in less damage, less waste, and a better finish.
“Ultrasonically assisted drilling has shown significant improvements in drilling carbon/epoxy composites with significantly reduced damage in the machined composite.
“This is particularly interesting, as any kind of machining of brittle composites can damage the composite material.
“The challenge is to minimise this and, if possible, completely eliminate damage due to drilling. Ultrasonic drilling has shown excellent damage mitigation with remarkable drilling force reductions.”
The technique is currently being extended into biomedical applications such as drilling holes in bones for orthopedic surgery.
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