METHOD FOR MONITORING A MACHINE TOOL, IN PARTICULAR FOR TOOL FRACTURE

• Main Authors: LÜGERING, UWE, WITTKOWSKI, THOMAS, IMIELA, JOACHIM, BRINKHAUS, JAN-WILM
• Format: Patent
• Language: English; Polish
• Published: 25.07.2022

The invention relates to a monitoring method for monitoring a machine tool (10), comprising (i) a spindle (14), (ii) at least one first machine axis (16), and (iii) a machine control (22), the method comprising the following automatically executed steps: (a) time-dependent detection of a spindle parameter (P), which describes a performance of the spindle (14); (b) detecting a signal noise parameter and/or a signal spanner parameter (Q); (c) after a predetermined program line of the processing program has been reached; continuously calculating a spindle parameter minimum value (PS,min) such that a current spindle parameter minimum value (PS,min(T)) is obtained; (d) continuously calculating a monitoring limit value (G(T)) from the spindle parameter minimum value (PS,min(Ƭ)); (e) storing the current monitoring threshold value (GT)), whenever the current monitoring limit value (G(T)) is smaller than a stored monitoring limit value (Gsp); and (f) outputting a warning message if the spindle parameter P is consistently below the stored monitoring limit value (Gsp) over a predetermined interval time (∆t).