Grinding Quality Study of Metal-bonded CBN Grinding Wheel with Laser Assisted Dressing

Metal-bonded CNB grinding wheels are widely applied in today's grinding industries due to its advantages such as long tool life, low wearing effect, fine dimensional stability etc. The quality of the surface finish during grinding is important as it influences the performance of the finished part to great extent. The preparation of metal-bonded grinding wheels by dressing has a large influence on the grinding performance. However, a low efficient dressing device cannot produce sufficient protrusion of cutting grain edges and dressing of metal-bonded grinding wheel is low efficiency by conventional dressing method. In this paper, laser assisted dressing technique for metal-bonded CBN grinding wheel is developed, and experiment results demonstrate the proposed laser-assisted dressing technique is greatly improving dressing efficiency, reducing dressing time, extending the life of diamond dresser comparing to conventional dressing method. Key parameters of straightness, cylindricity and roughness of Crankshaft between before and after dressing operation is contrasted, the results proves that in the practical grinding process, the laser assisted dressing technique has similar quality in contrast to conventional diamond dressing method and highly promotes the dressing efficiency.