Journal ArticleDOI
Chatter stability of orthogonal turn-milling analyzed by complete discretization method
Reads0
Chats0
TLDR
This model is used to investigate a cutting process for orthogonal turn-milling and obtain stability-lobe diagrams using the complete discretization method based on the Eulerian method, which can provide theoretical guidance for maximizing the processing efficiency and surface quality of workpiece manufactured by orthogonic turn- milling.Abstract:
Orthogonal turn-milling is a primary method of turn-milling, which is used for cutting. It is widely used for machining difficult-to-cut materials, slender rods, thin-wall rotary parts, and large rotary parts. As with turning and milling, chatter is generated by orthogonal turn-milling and affects machining productivity, machining accuracy, and tool life. Various methods are available to predict the chatter-stability lobes of orthogonal turn-milling, such as the zero-order analytical, multi-frequency solution, temporal finite-element-analysis, semi-discretization, and full-discretization methods. However, the zero-order analytical method may not be suitable for the actual conditions of orthogonal turn-milling. The multi-frequency solution, temporal finite-element analysis, and semi-discretization methods suffer from poor efficiency, and the full-discretization method involves complex iterative equations and halfway discretization. To overcome these obstacles, we propose herein a different stability model for orthogonal turn-milling. We use this model to investigate a cutting process for orthogonal turn-milling and obtain stability-lobe diagrams using the complete discretization method based on the Eulerian method. The diagrams are verified by comparing them against the experimental results for chatter. Furthermore, we simulate and analyze how feed per revolution of tools affects the cutting stability for orthogonal turn-milling. These models and results can provide theoretical guidance for maximizing the processing efficiency and surface quality of workpiece manufactured by orthogonal turn-milling.read more
Citations
More filters
Journal ArticleDOI
Determining the effect of tool posture on cutting force in a turn milling process using an analytical prediction model
TL;DR: In this article, the authors proposed a simulation model to predict the cutting force for 5-axis turn milling considering the contact behavior between the tool and workpiece depending on the tool posture.
Journal ArticleDOI
Development of a toolholder with high dynamic stiffness for mitigating chatter and improving machining efficiency in face milling
TL;DR: In this article, a novel toolholder with high dynamic stiffness to improve the chatter stability was developed, taking the effect of multiple order vibration modes into consideration, a dynamic model for face milling operation was established to investigate the relationship between the stability performance and modal parameters of the machining system.
Journal ArticleDOI
Development of Automatic Chatter Suppression System in Parallel Milling by Real-Time Spindle Speed Control with Observer-Based Chatter Monitoring
TL;DR: The results show that the developed real-time adaptive system of spindle speed suppresses chatter vibrations more effectively than non-adaptive SDM system; hence, the integrated system can contribute self-optimizing machining systems oriented to Industry 4.0.
Journal ArticleDOI
On-machine measurement method for dynamic stiffness of thin-walled workpieces
Daisuke Kono,Takuma Umezu +1 more
TL;DR: The displacement sensorless piezoexcitation (DSPE) method as mentioned in this paper uses a piezoelectric shaker attached to a machine tool spindle to measure the dynamic stiffness of thin-walled workpieces.
Journal ArticleDOI
Mathematical modeling of cutting layer geometry and cutting force in orthogonal turn-milling
TL;DR: The present models offer a theoretical guidance for efficient machining strategies in orthogonal turn-milling, and each geometry of cutting layer is modelled analytically, which leads to a mathematical model of the corresponding cutting force.
References
More filters
Journal ArticleDOI
Analytical Prediction of Stability Lobes in Milling
Yusuf Altintas,Erhan Budak +1 more
TL;DR: In this article, a new method for the analytical prediction of stability lobes in milling is presented, which requires transfer functions of the structure at the cutter -workpiece contact zone, static cutting force coefficients, radial immersion and the number of teeth on the cutter.
Journal ArticleDOI
Analytical Prediction of Chatter Stability in Milling-part I : General Formulation
Erhan Budak,Yusuf Altintas +1 more
TL;DR: In this paper, a general formulation for the dynamic milling system is developed by modeling the cutter and workpiece as multi-degree-of-freedom structures, considering the varying dynamics in the axial direction.
Journal ArticleDOI
Semi‐discretization method for delayed systems
Tamás Insperger,Gabor Stepan +1 more
TL;DR: In this article, the authors present a numerical method for the stability analysis of linear delayed systems based on a special kind of discretization technique with respect to the past effect only.
Journal ArticleDOI
Updated semi‐discretization method for periodic delay‐differential equations with discrete delay
Tamás Insperger,Gabor Stepan +1 more
TL;DR: In this paper, an updated version of the semi-discretization method is presented for periodic systems with a single discrete time delay, where the delayed term is approximated as a weighted sum of two neighboring discrete delayed state values and the transition matrix over a single period is determined.
Journal ArticleDOI
A full-discretization method for prediction of milling stability
TL;DR: A full-discretization method based on the direct integration scheme for prediction of milling stability based on Floquet theory that has high computational efficiency without loss of any numerical precision is presented.
Related Papers (5)
Chatter suppression analysis in milling process with variable spindle speed based on the reconstructed semi-discretization method
Xinfeng Dong,Weimin Zhang +1 more
Original article: Stability predictions of milling with variable spindle speed using an improved semi-discretization method
Qizhi Xie,Qichang Zhang +1 more