Identification of bearing dynamics under operational conditions for chatter stability prediction in high speed machining operations

2015 ◽  
Vol 42 ◽  
pp. 53-65 ◽  
Author(s):  
O. Özşahin ◽  
E. Budak ◽  
H.N. Özgüven
Keyword(s):  
High Speed ◽  
High Speed Machining ◽  
Stability Prediction ◽  
Chatter Stability ◽  
Operational Conditions ◽  
Machining Operations ◽  
Bearing Dynamics ◽  
Chatter Stability Prediction

Model-based chatter stability prediction for high-speed spindles

2007 ◽  
Vol 47 (7-8) ◽  
pp. 1176-1186 ◽  
Author(s):  
V. Gagnol ◽  
B.C. Bouzgarrou ◽  
P. Ray ◽  
C. Barra
Keyword(s):  
High Speed ◽  
Stability Prediction ◽  
Chatter Stability ◽  
Model Based ◽  
Chatter Stability Prediction

ANACONDA ALLOY 360

Alloy Digest ◽  
1982 ◽  
Vol 31 (11) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
High Speed ◽  
Heat Treating ◽  
High Speed Machining ◽  
Copper Base ◽  
Screw Machine ◽  
Medium Strength ◽  
Machining Operations ◽  
Strength And Ductility

Abstract ANACONDA Alloy 360 is a leaded brass and is the alloy most often used for high-speed machining operations; it fills most of the needs for such purposes. Alloy 360 is the standard free-cutting brass and its machinability has become the standard by which all other copper-base alloys are rated. It has medium strength and ductility. Alloy 360 is used for hardware such as gears and pinions where excellent machinability is of prime importance and for all types of automatic high-speed screw-machine products. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-447. Producer or source: Anaconda American Brass Company.

Mechanics and Dynamics of Multifunctional Tools

2015 ◽  
Vol 137 (1) ◽  
Author(s):  
Min Wan ◽  
Zekai Murat Kilic ◽  
Yusuf Altintas
Keyword(s):  
Time Domain ◽  
Prediction Models ◽  
Chip Thickness ◽  
Combined Processes ◽  
Multiple Delays ◽  
Stability Prediction ◽  
Chatter Stability ◽  
Regenerative Effect ◽  
Hole Making ◽  
Chatter Stability Prediction

The mechanics and dynamics of the combined processes are presented for multifunctional tools, which can drill, bore, and chamfer holes in one operation. The oblique cutting forces on each cutting edge with varying geometry are modeled first, followed by their transformations to tangential, radial, and axial directions of the cutter. The regenerative effect of lateral and torsional/axial vibrations is considered in predicting the dynamic chip thickness with multiple delays due to distribution of cutting edges on the cutter body. The lateral and torsional/axial chatter stability of the complete hole making operation is predicted in semidiscrete time domain. The proposed static cutting force and chatter stability prediction models are experimentally proven for two different multifunctional tools in drilling Aluminum Al7050 and Steel AISI1045.

Consolidated chatter stability prediction model considering material removing and ploughing processes

2019 ◽  
Vol 59 ◽  
pp. 120-133 ◽  
Author(s):  
Takehiro Hayasaka ◽  
Hongjin Jung ◽  
Kensuke Azuma ◽  
Eiji Shamoto
Keyword(s):  
Prediction Model ◽  
Stability Prediction ◽  
Chatter Stability ◽  
Chatter Stability Prediction

Novel Contact Sensor for High-Speed Machining

2012 ◽  
Vol 134 (6) ◽  
Author(s):  
Valéry Bourny ◽  
Florent Swingedouw ◽  
Thierry Capitaine ◽  
Aurélien Lorthois ◽  
Jérôme Dubois ◽  
...  
Keyword(s):  
Embedded System ◽  
High Speed ◽  
Ease Of Use ◽  
High Speed Machining ◽  
Workpiece Surface ◽  
Finishing Process ◽  
Contact Sensor ◽  
Magnitude Variation ◽  
Machining Operations ◽  
First Contact

This work presents a method implemented in an embedded system to detect the first contact between a high-speed machine tool and a workpiece surface with high accuracy, reliability and ease-of-use. This method is based on impedance magnitude variation measurements and the computation of a correlation function. A specific sensor was designed from this method for testing purposes in actual industrial conditions. This work is focused on the detection of the first contact between the tool and the workpiece surface. The purpose of this paper is to explore the efficiency of impedance spectroscopy and to identify a method to detect the first contact between a tool and a workpiece efficiently in high-speed machining operations and for the finishing process in particular.

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