Microscale fabrication of pin-shaped machine parts by a new centreless grinding technique Online publication date: Wed, 29-Nov-2006
by Yongbo Wu, Yufeng Fan, Masana Kato
International Journal of Nanomanufacturing (IJNM), Vol. 1, No. 1, 2006
Abstract: This paper proposes a new centreless grinding technique for the fabrication of microscale pin-shaped machine parts with large aspect ratio, and describes the design, construction and performance confirmation of the experimental apparatus which is composed mainly of an ultrasonic regulator used for controlling the rotation speed of the microscale workpiece. The regulator was constructed by bonding a plate-shaped piezoceramic device on an I-shaped metal body, on the end-face of which microscale ultrasonic elliptical vibration is generated. The structure and dimensions of a regulator were determined in detail by FEM analysis. Following workpiece rotation control tests using a special apparatus under a grinding-like configuration, a regulator was installed on an existing centreless grinder to perform actual microscale centreless grinding operations involving a tungsten carbide pin-shaped workpiece 0.6 mm in diameter and 15 mm in length. The experimental result gave a microscale workpiece 75 µm in diameter and 15 mm in length.
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