Werkzeugverschleißüberwachung beim Drehen und Bohren - Das Geräusch ist maßgebend.

A new method for automatic tool wear monitoring at turning has been developed based on the analysis of the continuous acoustic emission (machining noise) generated on the tool at machining procedure. Different wear types (wear of tool flank face and tool chipping) result in changes of the different characteristical values of the noise signal. In case of an uniform abrasion of the insert, e.g. flank face of crater wear, an increased mean signal level is abserved, whereas at arising microbreakage at tool edge an increase of the crest factor with nearly constant mean signal level is found. The burst-like signals from collision between chip and tool and from chip breakage have to be eliminated from analysis to avoid the distorsion of the signal parameters of the continuous acoustic emission (AE). This method should be well suited especially for monitoring of finishing processes (small depth of cut)