Milling chatter suppression in viscous fluid: A feasibility study

2017 ◽  
Vol 120 ◽  
pp. 20-26 ◽  
Author(s):  
Zhao Zhang ◽  
Hongguang Li ◽  
Guang Meng ◽  
Song Ren
Keyword(s):  
Viscous Fluid ◽  
Feasibility Study ◽  
Chatter Suppression ◽  
Milling Chatter

A Model-Based Computationally Efficient Method for On-Line Detection of Chatter in Milling

2013 ◽  
Vol 135 (3) ◽  
Author(s):  
Lei Ma ◽  
Shreyes N. Melkote ◽  
James B. Castle
Keyword(s):  
Cutting Force ◽  
Efficient Method ◽  
Frequency Estimation ◽  
Chip Thickness ◽  
Computationally Efficient ◽  
Model Based ◽  
Chatter Suppression ◽  
Force Signal ◽  
Regeneration Effect ◽  
Milling Chatter

This paper presents a model-based computationally efficient method for detecting milling chatter in its incipient stages and for chatter frequency estimation by monitoring the cutting force signals. Based on a complex exponentials model for the dynamic chip thickness, the chip regeneration effect is amplified and isolated from the cutting force signal for early chatter detection. The proposed method is independent of the cutting conditions. With the aid of a one tap adaptive filter, the method is shown to be capable of distinguishing between chatter and the dynamic transients in the cutting forces arising from sudden changes in workpiece geometry and tool entry/exit. To facilitate chatter suppression once the onset of chatter is detected, a time domain algorithm is proposed so that the dominant chatter frequency can be accurately determined without using computationally expensive frequency domain transforms such as the Fourier transform. The proposed method is experimentally validated.

Chatter Suppression in Milling: An Active Approach

1999 ◽  
Author(s):  
Douglas R. Browning ◽  
Igor Golioto ◽  
Norman B. Thompson
Keyword(s):  
The Body ◽  
Active System ◽  
Tool Holder ◽  
Chatter Suppression ◽  
Cutting Test ◽  
Active Approach ◽  
Chatter Control ◽  
Control Electronics ◽  
Drive Signals ◽  
Milling Chatter

Abstract A new approach to chatter control in milling is presented in this paper. The proof-of-concept control system comprises a tool holder, analog and digital control electronics, and power amplifiers to drive the actuator elements. The active tool holder, designed to impart counter-vibration forces to the milling tool, mounts to existing machines with a standard industrial interface. Sensors and piezoelectric actuators are imbedded in the stationary portion of the tool holder and are therefore fixed relative to the body of the milling machine. The controller operates on the two sensor signals, producing two orthogonal actuator drive signals to oppose resonant tool vibrations induced from the cutting forces. The paper first introduces the fundamental concepts of milling chatter and their relation to the described active system. The actuation, sensing and controller details follow. The influence of the tool holder on system dynamics and cutting stability is also addressed. Cutting test results using a titanium alloy are then described, demonstrating an improvement of a factor of five in surface finish relative to the uncontrolled, chatter-dominated case.

Multi harmonic and random stiffness excitation for milling chatter suppression

2019 ◽  
Vol 120 ◽  
pp. 777-792 ◽  
Author(s):  
Chenxi Wang ◽  
Xingwu Zhang ◽  
Jinxin Liu ◽  
Ruqiang Yan ◽  
Hongrui Cao ◽  
...  
Keyword(s):  
Chatter Suppression ◽  
Milling Chatter

Adaptive vibration reshaping based milling chatter suppression

2019 ◽  
Vol 141 ◽  
pp. 30-35 ◽  
Author(s):  
Chenxi Wang ◽  
Xingwu Zhang ◽  
Jinxin Liu ◽  
Hongrui Cao ◽  
Xuefeng Chen
Keyword(s):  
Chatter Suppression ◽  
Milling Chatter

Multi harmonic spindle speed variation for milling chatter suppression and parameters optimization

2019 ◽  
Vol 55 ◽  
pp. 268-274 ◽  
Author(s):  
Chenxi Wang ◽  
Xingwu Zhang ◽  
Ruqiang Yan ◽  
Xuefeng Chen ◽  
Hongrui Cao
Keyword(s):  
Spindle Speed ◽  
Parameters Optimization ◽  
Speed Variation ◽  
Chatter Suppression ◽  
Spindle Speed Variation ◽  
Milling Chatter

Robust active control based milling chatter suppression with perturbation model via piezoelectric stack actuators

2019 ◽  
Vol 120 ◽  
pp. 808-835 ◽  
Author(s):  
Xingwu Zhang ◽  
Chenxi Wang ◽  
Jinxin Liu ◽  
Ruqiang Yan ◽  
Hongrui Cao ◽  
...  
Keyword(s):  
Active Control ◽  
Perturbation Model ◽  
Chatter Suppression ◽  
Milling Chatter

Numerical Solution of Tuned Mass Dampers for Optimum Milling Chatter Suppression

2011 ◽  
Vol 697-698 ◽  
pp. 223-228
Author(s):  
Yi Qing Yang ◽  
T.T. Chen
Keyword(s):  
Vibration Suppression ◽  
Numerical Approach ◽  
Harmonic Excitation ◽  
Complex Problem ◽  
Depth Of Cut ◽  
Tuned Mass Dampers ◽  
Chatter Suppression ◽  
Machine Tool Chatter ◽  
Chatter Control ◽  
Milling Chatter

The most common tunings for the TMD in the field of vibration suppression are H∞ and H2. However, regenerative machine tool chatter is a complex problem with many variations, which therefore requires a new tuning for the optimum chatter suppression. The real part based tuning is investigated numerically by employing the minimax numerical approach, which aims to maximize the minimum real part of the primary structure under the harmonic excitation. The performances of multiple TMDs system are discussed. A face milling case is employed to verify the benefits of multiple TMDs in increasing the chatter free depth of cut. It is concluded that multiple TMDs configuration are more effective than single TMD in chatter control.

scholarly journals An Open Modular Architecture Controller Based Online Chatter Suppression System for CNC Milling

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
Zhenyu Han ◽  
Hongyu Jin ◽  
Maoyue Li ◽  
Hongya Fu
Keyword(s):  
Cutting Parameters ◽  
Cnc Milling ◽  
Modular Architecture ◽  
Part Quality ◽  
Chatter Suppression ◽  
Command Generation ◽  
Force Signal ◽  
Milling Chatter ◽  
The Relationship ◽  
Acceleration Signals

In milling processes, chatter is a kind of sudden relative vibration appearing between the cutter and the workpiece, which results in poor part quality, accelerated tool wear, and shortened spindle life. In this paper, an open modular architecture controller (OMAC) of machine tool which integrates the algorithms including chatter recognition, compensation command generation, and execution is proposed with the aim of providing an integrated solution for milling chatter suppression in CNC kernel. To effectively identify chatter, experiments are designed to determine the optimal installation place of accelerometer and then triaxial cutting forces and acceleration signals are compared to see which are more sensitive to chatter onset. In terms of data processing, 16 sampling points in time domain are chosen to perform online fast Fourier transform (FFT) in consideration of signal effectiveness and computational efficiency. To implement real-time chatter suppression in CNC kernel, a simplified dynamic model of milling system is used to obtain the relationship between chatter frequency and spindle speed. Finally, an adaptive control module which completes force signal extraction and processing by FFT and has the ability to modify related cutting parameters is designed to interact with other modules in OMAC where data acquisition thread and interpolation thread are synchronized. The proposed system is experimentally validated.

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