Development of Insert Condition Classification System for CNC Lathes Using Power Spectral Density Distribution of Accelerometer Vibration Signals

Insert conditions significantly influence the product quality and manufacturing efficiency of lathe machining. This study used the power spectral density distribution of the vibration signals of a lathe machining accelerometer to design an insert condition classification system applicable to different machining conditions. For four common lathe machining insert conditions (i.e., built-up edge, flank wear, normal, and fracture), herein, the insert condition classification system was established with two stages-insert condition modeling and machining model fusion. In the insert condition modeling stage, the magnitude features of the segmented frequencies were captured according to the power spectral density distributions of the accelerometer vibration signals. Principal component analysis and backpropagation neural networks were used to develop insert condition models for different machining conditions. In the machining model fusion stage, a backpropagation neural network was employed to establish the weight function between the machining conditions and insert condition models. Subsequently, the insert conditions were classified based on the calculated weight values of all the insert condition models. Cutting tests were performed on a computer numerical control (CNC) lathe and utilized to validate the feasibility of the designed insert condition classification system. The results of the cutting tests showed that the designed system could perform insert condition classification under different machining conditions, with a classification rate exceeding 80%. Using a triaxial accelerometer, the designed insert condition classification system could perform identification and classification online for four common insert conditions under different machining conditions, ensuring that CNC lathes could further improve manufacturing quality and efficiency in practice.

Medienart:

E-Artikel

Erscheinungsjahr:

2020

Erschienen:

2020

Enthalten in:

Zur Gesamtaufnahme - volume:20

Enthalten in:

Sensors (Basel, Switzerland) - 20(2020), 20 vom: 19. Okt.

Sprache:

Englisch

Beteiligte Personen:

Huang, Yi-Wen [VerfasserIn]
Yeh, Syh-Shiuh [VerfasserIn]

Links:

Volltext

Themen:

Accelerometer
CNC lathes
Insert conditions
Journal Article
Power spectral density

Anmerkungen:

Date Completed 09.03.2021

Date Revised 09.03.2021

published: Electronic

Citation Status MEDLINE

doi:

10.3390/s20205907

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM316557366