| 摘要 |
In a method for measuring a rotary tool use is made of a measuring device, which has an optoelectronic image acquisition device with optics alignable with the rotary tool and an image processing device for the computer-aided evaluation of acquired images. For measurement purposes a section of the rotary tool is brought into the image area of the optics and the rotary tool is rotated about its rotation axis. During rotation a sequence of frames of the rotating rotary tool is acquired. An evaluation of the frames is carried out with respect to at least one image parameter, which represents a measure for the positioning of the tool contour relative to the sharpness zone of the optics. By computer-aided selection a selection is made of the particular frame in which the image parameter corresponds to a positioning of the tool contour in the sharpness zone of the optics. This selected frame is used for determining at least one tool parameter characterizing the tool contour. The method according to the invention permits a precise, high speed tool measurement and there is no need for a (manual) focussing of the tool cutting edge.
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