STABILITY LOBES ANALYSIS OF NICKEL SUPERALLOYS MILLING

In this paper, we study the stability of a high speed milling process of nickel superalloys Inconel 713C by methods used in nonlinear dynamics. Stability Lobe Diagram was a result of modal analysis and next verified by recurrence plots, recurrence quantification analysis and classical nonlinear methods. A stability lobes diagram shows the indistinct boundary between chatter-free stable machining and unstable processes. Nevertheless, some recurrence quantification analysis measures give interesting results.

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Research on Stability of High Speed Milling System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.670.137 ◽

2013 ◽

Vol 670 ◽

pp. 137-142

Author(s):

Y.Y. Guo ◽

H. Lei ◽

C. Zhao ◽

C.T. Sun

Keyword(s):

High Speed ◽

Metal Removal ◽

Milling Process ◽

Depth Of Cut ◽

Engineering Practice ◽

Model Parameters ◽

High Speed Milling ◽

Stability Lobes ◽

The Stability ◽

Axial Depth

Machining instability is often the limiting factor on metal removal rate. So the stability of cutting system is an important research in high-speed machining area. It is widely used in engineering practice. In this paper, the stability of high-speed milling was studied by the numbers aiming at the dynamic milling process model of ball-end mill. The dynamic model of high-speed milling process was established. On the basis of Altintas’s theory, the formula about the limit axial depth of cut was derived. Besides, the model parameters of the system were obtained and the accuracy of the stability lobes diagram was verified through the experiments. From this research, it was learned that structure parameters of machine tool-cutting tool system, cutting force coefficients, spindle speed and axial depth of cut were factors affecting the stability in high-speed cutting. And the obtained stability lobes diagram provided a reliable basis in selecting cutting parameters during tool path planning.

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Chatter Detection in Milling of Carbon Fiber-Reinforced Composites by Improved Hilbert–Huang Transform and Recurrence Quantification Analysis

Materials ◽

10.3390/ma13184105 ◽

2020 ◽

Vol 13 (18) ◽

pp. 4105

Author(s):

Rafał Rusinek ◽

Paweł Lajmert

Keyword(s):

Carbon Fiber ◽

Milling Process ◽

Recurrence Quantification Analysis ◽

Depth Of Cut ◽

Fiber Reinforced ◽

Hilbert Huang Transform ◽

Recurrence Quantification ◽

Quantification Analysis ◽

Carbon Fiber Reinforced ◽

Mill Cutter

In the paper, the problem of chatter vibration detection in the milling process of carbon fiber-reinforced plastic is investigated. Chatter analysis may be considered theoretically based on data from impact test of an end mill cutter. However, a stability region obtained in such way may not agree with the real one. Therefore, this paper presents a method that can predict chatter vibrations based on cutting force components measurements. At the beginning, a stability lobe diagram is created to establish the range of experimental test in the plane of tool rotational speed and depth of cut. Next, an experiment of composite milling is performed. The experimentally-measured time series of cutting forces are decomposed with the use of the improved Hilbert–Huang transform (HHT). To detect chatter, statistical methods and recurrence quantification analysis (RQA) are used. However, much better results are obtained when new chatter indexes are proposed. The indexes, derived directly from the HHT and RQA methods, can be used to build an effective chatter prediction system.

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Stability Prediction in High-Speed Milling Process Considering the Milling Force Coefficients Dependent on the Spindle Speed

Journal of Advanced Manufacturing Systems ◽

10.1142/s0219686714500152 ◽

2014 ◽

Vol 13 (04) ◽

pp. 247-255 ◽

Cited By ~ 1

Author(s):

Kunlong Wen ◽

Houjun Qi ◽

Gang Jin

Keyword(s):

High Speed ◽

Milling Process ◽

Spindle Speed ◽

Chatter Vibration ◽

Milling Force ◽

High Speed Milling ◽

Force Coefficients ◽

Stability Lobe ◽

Vibration Model ◽

The Stability

In order to further research the chatter vibration in high-speed milling, in this paper, a new regenerative chatter vibration model, considering the effect of milling force coefficients dependent on the spindle speed (MFCDSS) on the stability of high-speed milling process is proposed, and then milling stability lobe diagram is obtained, based on full-discretization method (FDM). The variable tendency of the stability of milling system is analyzed by comparisons in case of different radial immersion ratios in low-speed and high-speed milling regions, respectively. It is found that great stability predicting differences occur, especially in high-speed region when the MFCDSS is considered. This model can further supplement the theory of stability of high-speed milling process, it has certain engineering guidance significance in the selection of high-speed milling parameters.

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