An Increase in the Vibration Resistance of Finishing and Boring Machines when Cutting Ends Using the Plunge-In Method

The article examines the operation of trimming the free end using the cutting-in method. This operation is widely used in the technological process of manufacturing parts. The vibration resistance of the delicate tuning process during the finishing trimming of solid ends has been studied. The experiments were carried out on a special stand with the ability to change the parameters of the elastic system. Inductive and inductive sensors were used to measure vibrations. A method has been developed for calculating the maximum cutting width with a cutter shovel when changing the rigidity of the part-device subsystem, feed, and workpiece material. It has been established that the rigidity of the part-device subsystem largely determines the occurrence of vibrations. The article mainly examines vibrations along the axial coordinate in the feed direction, which determines the cleanliness of the machined surface and the feasibility of the end-trimming operation. A calculation model of the operation has been developed. In this model, the cutting process is described by a dynamic characteristic reflecting the inertial properties of the process. The stability of the cutting process is determined by the Routh-Hurwitz criterion. Calculations make it possible to determine the dimensions of a given device's maximum permissible width of the machined end. The experiment and corresponding calculations were done using a device with variable parameters. The results of the work are presented in the form of tables and graphs.