| 摘要 |
A method of performing an operation on a workpiece comprising the preparatory steps of simultaneously positioning and clamping a workpiece by a bearing surface thereof onto a receiving surface of a clamping body with the aid of complementary positioning devices provided in the bearing surface and receiving surface and which enable the workpiece and the clamping body to be clamped together. The clamping body has, at a predetermined position relative to its positioning devices, reference features which are detectable by measurement techniques. At least one co-ordinate measure of a reference co-ordinate system is definable in the plane of the receiving and is derivable from the positioning devices.
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