Grinding of Gears with Vitreous Bonded CBN-Worms

Among the industrial gear grinding processes, continuous generating grinding allows the highest material removal rates due to its kinematics. The process capabilities can be further increased by using CBN as a more efficient abrasive material. The research work described in this paper proves the high potential of vitreous bonded CBN grinding worms. Compared to corundum worms, the CBN tools offer significantly better behavior with regard to process stability, gear quality and residual stress on the machined gear tooth flanks. The results also show that a well adapted dressing technology is not only an important prerequisite for the efficient application of CBN worms but it also offers excellent and further possibilities to increase the grinding process performance. Dressable CBN grinding worms have not yet been introduced to industrial gear grinding processes. The paper gives an insight into the preparation and application of these innovative tools not only for academia but also for industry.