Method for evaluating the rotational speed of the tool mounted on the spindle for rotation of the machine tool and such a machine tool

摘要

In a machine tool (1) having a rotating spindle (2) and a vision system (7) for acquiring a plurality of images of a tool (3) mounted on the spindle, a nominal rotational speed value of the spindle An image acquisition period (TA) is determined for each value (VC) of a plurality of preselected rotation speed value intervals (ICN) centered on (VN). It is calculated for its preselected speed value, and is a multiple of the spindle rotation period (TR), in harmony with the vision system. In order to obtain an evaluation speed value (VS) associated with the nominal speed value by selecting a preselected speed value corresponding to a representative set of images that are most similar to each other based on a similarity rule, the spindle is nominal. While rotating at the upper rotational speed, a representative set of tool images with acquired image acquisition periods in time is acquired.