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Prediction of Dynamic Cutting Force and Regenerative chatter stability in Inserted Cutters Milling

Chinese Journal of Mechanical Engineering 2013年第3期26卷 555-563页

作者： LI Zhongqun LIU Qiang YUAN Songmei HUANG Kaisheng School of Mechanical Engineering Hunan University of Technology School of Mechanical Engieering and Automation Beihang University

Currently, the modeling of cutting process mainly focuses on two aspects: one is the setup of the universal cutting force model that can be adapted to a broader cutting condition; the other is the setup of the exact cutting force model that can accurately reflect a true cutting process. However, there is little research on the prediction of chatter stablity in milling. Based on the generalized mathematical model of inserted cutters introduced by ENGIN, an improved geometrical, mechanical and dynamic model for the vast variety of inserted cutters widely used in engineering applications is presented, in which the average directional cutting force coefficients are obtained by means of a numerical approach, thus leading to an analytical determination of stability lobes diagram (SLD) on the axial depth of cut. A new kind of SLD on the radial depth of cut is also created to satisfy the special requirement of inserted cutter milling. The corresponding algorithms used for predicting cutting forces, vibrations, dimensional surface finish and stability lobes in inserted cutter milling under different cutting conditions are put forward. Thereafter, a dynamic simulation module of inserted cutter milling is implemented by using hybrid program of Matlab with Visual Basic. Verification tests are conducted on a vertical machine center for Aluminum alloy LC4 by using two different types of inserted cutters, and the effectiveness of the model and the algorithm is verified by the good agreement of simulation result with that of cutting tests under different cutting conditions. The proposed model can predict the cutting process accurately under a variety of cutting conditions, and a high efficient and chatter-free milling operation can be achieved by a cutting condition optimization in industry applications.

关键词： inserted cutter cutting force prediction chatter stability dynamic simulation

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PREDICTION chatter stability AND BIFURCATION IN MILLING

PREDICTION CHATTER STABILITY AND BIFURCATION IN MILLING

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The Third International Conference on Dynamics, Vibration and Control

作者： D.M.Zhao Q.C.Zhang P.Liu Department of Mechanical Engineering Tianjin University.Tianjin 300072.China

＜正＞chatter in machine is gained more and more attention because of its occurrence results in poor surface finish,promotes wear of the tool and hamper *** shifted Chebyshev polynomials and Floquet theory are adopted for the prediction chatter stability and bifurcation in *** stability lobes diagram is *** stability in milling can well be predicted by the lobes *** muliti-periodic and Hopf bifurcations are detected by the Eigen-values *** result shows that the stability solution of the system transtorm from the stable equilibrium point to the limit cycle oscillatory after multiple cycle bifurcation,and it transforms to the quasi-periodic oscillation after Hopf *** numerical result of the Poincare section proves that the occurrence of the quasi-periodic oscillation

关键词： chatter stability Chebyshev polynomials bifurcation

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Efficient and Stable Optimization of Multi‑pass End Milling Using a Cloud Drop‑Enabled Particle Swarm Optimization Algorithm

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Transactions of Nanjing University of Aeronautics and Astronautics 2021年第3期38卷 462-473页

作者： CAI Xulin YANG Wenan HUANG Chao National Key Laboratory of Science and Technology on Helicopter Transmission Nanjing University of Aeronautics and AstronauticsNanjing 210016P.R.China

Optimization of machining parameters is of great importance for multi-pass end milling because machining parameters adversely or positively affect the time and quality of *** paper develops a second-order fulldiscretization method(2ndFDM)-based 3-D stability prediction model for simultaneous optimization of spindle speed,axial cutting depth and radial cutting *** optimal machining parameters in each pass are obtained to achieve the minimum production time comprehensive considering constraints of 3-D stability,machine tool performance,tool life and machining requirements.A cloud drop-enabled particle swarm optimization(CDPSO)algorithm is proposed to solve the developed machining parameter optimization,and 13 benchmark problems are used to evaluate CDPSO *** results show that CDPSO algorithm has a certain advantage in computational cost as well as comparable search quality and robustness.A demonstrative example is provided.

关键词： machining parameter multi-pass end milling chatter stability particle swarm optimization(PSO) cloud model

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Influence of Cutter Geometric Parameters on the stability of Milling Process of Thin-walled Blades

Influence of Cutter Geometric Parameters on the Stability of...

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2012 International Conference Mechatronic Systems and Materials Application(ICMSMA 2012)

作者： Wei-Wei Liu Feng Li Chen-Wei Shan Xiao-Juan Gao Key Laboratory of Contemporary Design and Integrated Manufacturing Technology Ministry of Education Northwestern Polytechnical University

In this paper, a new experiment procedure is proposed to study the influence of cutter parameters and clamping methods on the stability of the milling process of thin-walled bladeA dedicated fixture is designed to carry out the experimentSimulation results show that the new clamping system can enhance the rigidity of thin-walled blade to reduce cutting deformation and chatter vibration phenomenonThen, cutter and cutting parameters can be optimized properly to make the system obtain high rigidity and high performance stable milling processIndustrial application indicates that the new system can improve the cutting performance and ensure the cutting quality.

关键词： chatter stability Thin-walled blade Milling Cutter parameter.

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