Use of vibro-acoustic monitoring for stabilization stress–strain state of surface layer of workpiece during cutting

The part surface quality directly affects the performance properties of the part, such as environmental resistance, reliability, and durability. The cutting tool wear is one of the dominant factors affecting the formation of the surface layer. The paper is devoted to monitoring of the effect tools wear under the deformation of the surface layer of a part by means of analyzing vibration signals, which are accompanied cutting. The tests were carried out during tool turning in different states with a simultaneous recording of signals from the accelerometer and then, studying the deformations of the surface layer of the parts. We used a grid method to study the deformations. As a result, the relationship between the signal parameters and the accelerometer was established with the intensity of deformation of the surface layer. We proposed a criterion determination technique for the failure of an instrument to change the shape of the vibration signal spectrum. We showed the necessity to exclude intense self-oscillations during cutting. © 2019, Springer Nature Switzerland AG.