Method and machine - tool in order to monitor we shall now describe a progressive breakage of a cutting tool

摘要

The invention relates to the 2002, in order to machine - tool. / p & & p & a system of detection of a rupture of the tool comprises an automatic gain control (agc) 15 for maintaining a mean level desire the signal which results from the vibrations of the cutting. The time constant of the agc is sufficiently long so that it does not affect the transitions of the signal level castings and fast which are characteristics of a tool breakage abrupt. However, the action of the agc eliminates a progressive decrease of the level of the signal which results in a progressive rupture, by disaggregation. In order to allow the detection of this type of rupture, the crossing of a threshold of gain high causes the recovery of the gain has a low value, and therefore an abrupt transition detectable. / p & & p & application to the automation of machining sequences