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عدد المساهمات : 18726
التقييم : 34712
تاريخ التسجيل : 01/07/2009
الدولة : مصر
العمل : مدير منتدى هندسة الإنتاج والتصميم الميكانيكى
 |  موضوع: بحث بعنوان A Review of Chatter Vibration Research in Milling الخميس 27 أكتوبر 2022, 12:08 am | |
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أخواني في الله
أحضرت لكم
بحث بعنوان
A Review of Chatter Vibration Research in Milling
Caixu YUE a,*, Haining GAO a, Xianli LIU a, Steven Y. LIANG b, Lihui WANG c
a Harbin University of Science and Technology, Harbin 150080, China
b Georgia Institute of Technology, Atlanta, GA 30332-0405, USA
c KTH Royal Institute of Technology, Stockholm, Sweden
و المحتوى كما يلي :
Abstract Chatter is a self-excited vibration of parts in machining systems. It is widely present
across a range of cutting processes, and has an impact upon both efficiency and quality in production processing. A great deal of research has been dedicated to the development of technologies that
are able to predict and detect chatter. The purpose of these technologies is to facilitate the avoidance of chatter during cutting processes, which leads to better surface precision, higher productivity,
and longer tool life. This paper summarizes the current state of the art in research regarding the
problems of how to arrive at stable chatter prediction, chatter identification, and chatter control/-
suppression, with a focus on milling processes. Particular focus is placed on the theoretical relationship between cutting chatter and process damping, tool runout, and gyroscopic effect, as well as the
importance of this for chatter prediction. The paper concludes with some reflections regarding possible directions for future research in this field.
Conclusions
Due to a lack of dynamic stiffness in machine tool-tool,
holder-tool, cutter-workpiece systems, three forms of vibration
can be generated during machining: free vibration, forced
vibration, and self-excited vibration. If a system is wellbalanced, the first two kinds of vibration can be avoided,
reduced, or eliminated. Self-excited vibration is undamped
vibration caused by the alternating forces produced by the
interaction between a tool and a workpiece. This greatly
increases the instability and uncontrollability of a system.
The most common form of self-excited vibration is regenerative chatter. Since the 1950s, researchers have been carrying
out extensive and thorough research regarding the problem
of chatter. Advances in computers, sensors, and actuators have
improved understanding of these phenomena and helped with the development of strategies for overcoming instability
problems.
This paper has summarized state-of-the-art chatter prediction, chatter detection, and chatter control/suppression in
milling processes, and has discussed the relationship between
cutting stability and process damping, tool runout, and gyroscopic effect. The main outcomes of the paper are as follows:
(1) By looking at research regarding input parameters (cutting force coefficient, process parameters, tool parameters, system dynamics), dynamics modeling (degree-offreedom models), and the solution of delay differential
equations (frequency domain methods, discrete methods, numerical methods, and so on), prediction of stability in milling processes has been summarized, and the
relationship between various factors and realization of
stability has been clarified.
(2) By examining works related to acceleration signals, cutting force signals, acoustic signals, and machined surface
signals, we have summarized how detection of chatter in
milling processes can be brought about by using neural
networks, support vector machines, Hilbert-Huang
algorithms, and so on.
(3) We have emphasized the distinction in passive control
technology between damper technology and special tool
shape design technology.
(4) By looking at detection of machine processing information and use of intelligent algorithms for analysis, storage, and judgment, we have brought together ways in
which researchers are currently trying to achieve active
control of milling process chatter.
(5) We have also discussed and analyzed the relationship
between process damping, tool runout, gyroscopic
effect, and chatter and the stability of milling processes.
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