A laser touch dressing process for single layer electroplated diamond tools producing positive clearance angles on most of the diamond grains was developed, using an ultra-short pulsed laser with 10 ps pulse duration and 10 W average power. Extensive 3D topography measurements of the abrasive covering were carried out and analysed using a specially developed algorithm, to confirm the presence of a clearance face on the cut grains. The positive effect of the clearance angles on the tool is highlighted by dressing experiments on vitrified bond corundum where the laser dressed tools are compared to conventionally dressed tools.
The topographical analyses of the abrasive covering show, on average, a positive clearance face on the cut grains of 2.4°. Force measurements during dressing experiments show a reduction in processing forces of up to 70% for laser touch dressed tools compared to conventionally dressed tools.
The paper presented at the Schweizer Schleif-Symposium 2016 can be found here (German).