Abstract
Here, a new truing method for small-diameter CBN wheels is proposed. Truing of CBN wheels by polycrystalline diamond (PCD), which has excellent wear resistance, was performed and correlations between truing force, grinding force, and surface roughness were examined. In internal grinding of holes 4-mm in diameter with quills 3-mm in diameter, the main results obtained were as follows: (1) Truing force was less than 0.1 N and grinding force was less than 1.13N, and it did not affect the flexure of the quills. (2) Regardless of the use of abrasive grain #80/100, the average surface roughness Ra was less than 0.1 μm. (3) The accuracy of sharpness control of grain cutting edges was improved compared to conventional truing tools. In addition, it was verified experimentally that the new truing method is applicable for quills 3 – 0.6 mm in diameter.
