一种新的在高速铣削中识别稳定性极限图的分析实验方法外文文献翻译、中英文翻译
XXX 设计
外文文献及译文
文献、资料题目：A new analytical–experimental method
for the identification of stability lobes in high-speed milling
文献、资料来源：国外金属加工 2OO5 年第 26 卷
第
3
期
文献、资料发表（出版）日期：2005.3
院 （部）：
专 业：
班 级：XXXXXX
姓 名：
学 号：
指导教师：
翻译日期：
外文文献
A new analytical–experimental method for the identification of stability
lobes in high-speed milling
There is a pressing economic need for efficient machine-tool operation. A wide range of
research has been conducted to determine the optimal parameters for machining (i.e. feed of rate,
depth of cut, and spindle speed). Studies have focused on cost minimization, machining time
minimization and metal-removal rate (MRR) maximization. Most optimization methods seek to
increase the MRR and are oriented towards optimizing cutting speeds and accelerations. Even so,
thesemethods do not guarantee the optimal solution, since they are developed in a space
conspicuously free fro mall the restrictions entailed in real machining.
Some attempts at finding the optimal values of cutting parameters consider different objective
functions , including production-cost minimisation [1], production time minimisation [2] and a
combination thereof [3,4].
However, the limiting factor for most optimization methods is the instability involved in milling
operations. Instability is a vibratory phenomenon and can be measured and described in a
quantitative form. Diverse studies of the vibratory phenomenon have been made for machine tools
and with the help of technology, it is now in a certain way scientifically possible to quantify the
characteristics of the vibration in machining processes, to predict chatter and to make pertinent
recommendations to avoid it.
Tobias, in ‘‘Vibrations in Machine-Tools’’ [5], discusses the principles of vibration theory
applicable to machine tools and offers a critical overview of the main theoretical and experimental
results in the investigation of chatter. Nevertheless, since 1961, the year when the original
manuscript of the book was finished, machine-tool research has made great strides. New techniques
for predicting machine-tool instability have been developed and have been applied successfully.
Other aspects of chatter theory, however, have not changed; the way the cutting process under
chatter conditions is conceptualised has not altered, nor has the exceptional importance of the
regenerative effect as the main physical cause of instability been questioned.
In 1983, Tlusty et al. [6] examined machining stability, especially in high-speed machining
(HSM). They applied an approach using a time-domain simulation in order to analyze chatter and
thus to enhance the knowledge of the effect of cutting speed on milling operations. In this paper,
stability lobe diagrams, based on the axial depth of cut and speed (Fig. 1), are obtained.
Another study of Ismail and Soliman [8] introduces a method for identifying stability lobes in
milling operations. This method depends on ramping the spindle speed while monitoring the
behavior of a chatter indicator. Based on patterns shown by this indicator, stability lobes can be
identified on line. The proposed technique makes it viable to locate stable regions during practical
tests while avoiding chatter.
In 1998, Abrari et al. [7] presented a dynamic-force model and a stability analysis for ball-end
milling. The concept of equivalent orthogonal cutting conditions, which they applied to modeling the
mechanics of ball-end milling, can be extended to include the dynamics of cutting forces. The model
thus developed can generate forces very similar to the data from the experiments.
A more recent study from Naterwalla [9] has been published on how to perform machining
operations without chatter and maximise MRR for the metal industry.
As a result of technological advances in tools and machine tools, operations are taking place at
increasingly higher speeds and accelerations. The terms ‘‘high-speed machining’’, ‘‘high speed of
cut’’ (HSC) and ‘‘high-speed performance’’ (HSP) have become more common over the last few
years for describing the process of machining at high speeds.
Because machining operations are taking place at increasingly higher speeds, studies in the area of
vibrations have branched off into researching the stability of HSM. One of Tlusty’s studies [10]
describes HSM applications in facing for airplane structures and introduces a case of ‘‘high-speed
grilling’’.
Fig.1 Example of a stability diagram
In the year 2000, Altintas [12] published a paper focusing on the foundations of metal-cutting
mechanisms, static and dynamic deformations, principles for the design of CNC, sensor-assisted
machining and technology for programming numerical-control machines. He proposes a method for
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XXX设计外文文献及译文文献、资料题目：Anewanalytical–experimentalmethodfortheidentificationofstabilitylobesinhigh-speedmilling文献、资料来源：国外金属加工2OO5年第26卷第3期文献、资料发表（出版）日期：2005.3院（部）：专业：班级：XXXXXX姓名：学号：指导教师：翻译日期：外文文献Anewanalytical–experimentalmethodfortheidentificationofstabilitylobesinhigh-speedmillingThereisapressingecono...
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作者：设计吧
分类：课程设计课件资料
价格：10光币
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大小：560.56KB
格式：DOC
时间：2023-02-13
