METHOD FOR MONITORING THE RUNNING OF A TOOL OF AN NC MACHINE TOOL AND NC MACHINE TOOL WITH RUNNING CONTROL

摘要

The method according to the invention for monitoring the concentricity of a tool (3) of an NC machine tool (1) rotatable about the Z axis by means of a proximity sensor (4), the tool (3) and the proximity sensor (4) being moved relative to one another along the X axis. , Y and Z axes are movable, includes the following steps:(A) recording a distance characteristic (8) of the proximity sensor (4) to the tool (3) at a predetermined Z position (Z 0) of the tool (3) by relative method of the tool (3) and proximity sensor (4) in one to the tool axis (Z) right-angled direction (Y);(b) positioning the tool (3) to the proximity sensor (4) at a predetermined measuring position (X 0, Y 0, Z 0) and storing the measuring signals of the proximity sensor (4) or the distances determined from these measuring signals on the basis of the distance characteristic (8) the tool (3) to the proximity sensor (4) in a plurality of different rotational positions of the tool (3) as reference signals or as reference distances; and(c) for a concentricity control of the tool (3):repositioning the tool (3) to the proximity sensor (4) at the predetermined measuring position (Xo, Yo, Zo),Determining a runout ("d) from the difference between the current measurement signals of the proximity sensor (4) in the several different rotational positions of the tool (3) and the stored reference signals based on the distance characteristic (8) or from the difference between the current measurement signals based the distance characteristic (8) determined actual distances of the tool (3) to the proximity sensor (4) in the several different rotational positions of the tool (3) and the stored reference distances,andChecking the tool (3) if a specified runout is exceeded.