Experimental study on truing of bronze-bonded diamond wheels with coarse abrasive grits using a novel hybrid method

The application of metal-bonded super abrasive wheels has provided a solution for grinding of hard and brittle materials. However, the high strength of metal bond of wheels made their truing extremely difficult. Normally metal-bonded wheels with fine grits can be trued using mechanical truing, electro-chemical truing and laser truing. For coarse wheels, due to their relatively large grits, truing can' t be completed only using any individual method mentioned above efficiently. This paper reports a hybrid method, i. e. combining electrical discharge and mechanical truing for bronze-bond diamond wheels, and clarifies its truing mechanism; additionally, the relation between the discharge gap and electrical parameters is studied and applied in the truing of bronze-bonded diamond wheels. The experimental results show that bronze-bonded diamond wheels with coarse abrasive grits can be trued efficiently by this novel hybrid method, and the truing precision can be up to 6 μm or so