Machining Stability Estimation Based on Semi-empirical Cutting Force Model Incorporating Machine Tool Runout Effects
Journal
Procedia CIRP
Journal Volume
130
Journal Issue
27
Start Page
1752
End Page
1757
ISSN
2212-8271
Date Issued
2024
Author(s)
DOI
10.1016/j.procir.2024.10.311
Abstract
This work demonstrates a method for generating the stability lobe diagram that captures the effect of machine tool runout in practical scenarios. In particular, in contrast to the conventional approaches that use theoretical cutting force to yield the stability plot, the nonideal effect such as tool runout inherent in the actual cutting force is considered in the stability analysis. By treating each individual blade of the machine tool with a cutting coefficient, a developed model successfully yields accurate fitting to the measured cutting forces. The simulated cutting forces based on runout induced mismatched cutting parameters of each blade are then plugged into a mechanical vibration model to generate the information of the velocity and displacement at the tool center point. Subsequently, the calculated cutting forces are transformed into the frequency domain using the Fast Fourier Transform (FFT) method, enabling the determination of the stable/unstable cutting regions. Additionally, this work investigates the impact of different runout levels on stability lobe diagrams and the results show that a greater runout increases the stable region. This proposed approach not only offers a precise estimation of machining dynamics, but also facilitates the selection of the optimal cutting depth by manufacturers to accelerate manufacturing.
Event(s)
18th IFAC Workshop on Time Delay Systems, TDS 2024, Udine, 2 October 2023 through 5 October 2023, Code 150988
Subjects
Cutting Force Model
Runout Effect
Stability Lobe Diagram
Time Domain Method
SDGs
Publisher
Elsevier BV
Type
journal article