Researchers from the Fraunhofer institute have cut friction by 20% by applying ultrasonic vibrations at 500Hz during the deep drawing metal manufacturing process, according to a patent filed by the researchers.
Reducing friction in this way could allow for a deeper single-stage draw, as well as protecting tool life and making more efficient use of lubricants, as the process generates less heat.
Deep drawing metal from flat sheets uses a punch and forming die, but puts huge stresses on the metal and tools involved.
Applications could include ammunition casing and beverage cans.
