The Abrasion Mechanism of a Diamond Grinding Wheel with Resin Cured by Ultraviolet Light

摘要

Ultraviolet light (UV)-cured abrasive tools have been studied and proven to have substantial advantages over conventional abrasive tools, not only in low energy cost and high efficiency when manufacturing the tool itself, but also in better performance when machining some materials. However, very little research has been done to study the mechanism of UV cured abrasive tools. Nevertheless, many researchers have investigated the performances of such tools compared with some conventional tools. A mechanism of UV cured, resin bonded, diamond wheel was proposed as the hybrid of grinding and lapping, which is called as grind/lap (G/L) process. In the paper, the proposed mechanism was verified by comparing the experimental results of three processes. Three wheels were used to simulate grinding, lapping and G/L operation separately under the same experimental setting. The results showed that the average surface roughness (RA) obtained by G/L wheel decreased to a value between those gained by grinding and lapping operations after 10 minutes and it became the lowest of the three as time increases. The RA and material removal rate (MRR) of three processes indicated that at the beginning of operation, the abrasives in G/L wheel are fixed by the cured resin, and as machining time increases, the small grains get released from the wheel and act as loose abrasives. Therefore, the mechanism of the UV cured resin bonded diamond wheel is verified as the dominant grinding at the beginning and lapping at the end, which was also illustrated by the surface profile of machined part.