| 摘要 |
In effecting two-sided surface grinding for surface-grinding the opposite surfaces of a workpiece (17) simultaneously by a pair of oppositely disposed grinding wheels (12) and (13), infeed grinding is performed by oscillating the workpiece (17) within the range where the surfaces to be ground (17a) of the workpiece (17) do not stick out from the inner and outer peripheries of the grinding wheel surfaces (12a) and (13a) of the grinding wheels (12) and (13), and then through-grinding is performed by feeding the workpiece (17) to allow the surfaces to be ground (17a) to pass along the inner and outer peripheries of the grinding wheel surfaces (12a) and (13a). As a effect, worn wheel edges or the like can be prevented from being formed in the inner and outer peripheral edges, that grinding wheel surfaces can be maintained in proper shape for a prolonged time, that the grinding accuracy is better, and that dress interval can be prolonged, thus improving the life of grinding wheels.
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