Capabilities

Ultrasonic Machining

SEM of a 0.64mm hole ultrasonically machined in an alumina substrate

Ultrasonic machining, also known as ultrasonic impact grinding, is the use of ultrasonically-induced vibrations delivered to a tool.

When combined with an abrasive slurry, ultrasonic machining allows the tool to create accurate cavities of virtually any shape in hard, brittle materials.

This machining process is nonthermal, nonchemical, and nonelectrical. It does not change the metallurgical, chemical or physical properties of the workpiece.

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The cutting vibration which Bullen uses in the ultrasonic machining process begins with converting a high-frequency electrical signal into an oscillatory mechanical motion. This motion is acoustically transmitted through a metal tool holder and cutting tool assembly. This linear oscillation is typically at a rate of 20,000 times per second, and, when used with an abrasive slurry flowing around the cutting tool, microscopic grinding occurs.

The machined area becomes counterpart of the cutting tool used. Using this technology, Bullen can offer you an almost limitless assortment of types and shapes of cuts to meet any design requirements you may have.