Abstract
Helical scan grinding has been found to improve the ground surface roughness and decreases the value of roughness to one seventh of that by plunge grinding (K. Suzuki et al, Proceedings of the International Conference On Machining of Advanced Materials, NIST, Gaithersburg, USA, 1993, pp. 12–20). In the present work an analytical model of ground surface texture was proposed for helical scan grinding, and the results of the analysis were compared with experimental results. Both experiment and analysis show that the ground surface roughness decreases with helical angle and reaches a limiting surface-roughness value at a critical helical angle, which latter is dependent on the speed ratio. Increasing the speed ratio increases the critical helical angle and then decreases the limiting surface roughness. The theoretical model also shows that the critical helical angle is dependent on the wheel diameter and the abrasive size of the wheels. The helical scan grinding method is more effective in improving ground surface roughness, for large and/or coarse wheels than for small and/or fine wheels.
Published Version
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