Edge Contour Measurement of Single Point Diamond Cutting Tools by an Optical Probe
This paper presents an optical probe employed for edge contour measurement of single point diamond cutting tools. The laser beam from a laser diode (LD) is focused by an objective lens to form a small light spot with a radius of approximately 20 μm, and is then received by a photodiode (PD) after passed through the focal point of the objective lens. The cutting edge of the tool, which is placed on a line with the LD and the PD, is inserted into the laser beam section. At an each X-position, the output of the PD is recorded while the light spot is moved along the Z-direction, scanning across the cutting edge of the tool with its rake face aligned in the XZ plane. The Z-position of the cutting edge is evaluated by determining a specific value from the obtained outputs of the PD. The edge contour of the diamond cutting tool can thus be measured by repeating the Z-scanning at different X-positions. Computer simulation was carried out to investigate the influences of error factors on the evaluation of the cutting edge. Experiments were also carried out to measure a round nose of a tool with nominal nose radius of 2 mm.
Tojiro Aoyama, Hideki Aoyama, Atsushi Matsubara, Hayato Yoshioka and Libo Zhou
S. H. Jang et al., "Edge Contour Measurement of Single Point Diamond Cutting Tools by an Optical Probe", Key Engineering Materials, Vols. 523-524, pp. 925-931, 2012