Optimally tuning an absorber for a chatter-resistant rotating slender milling tool holder

2021 ◽  
pp. 116594
Author(s):  
Arjun Patel ◽  
Devang kumar Talaviya ◽  
Mohit Law ◽  
Pankaj Wahi
Keyword(s):  
Tool Holder ◽  
Milling Tool

In Situ Chatter Frequency Prediction Using Torque Data From a Wireless Sensor Integrated Tool Holder

2009 ◽  
Author(s):  
Christopher A. Suprock ◽  
Robert B. Jerard ◽  
Barry K. Fussell
Keyword(s):  
Real Time ◽  
End Milling ◽  
Predictive Coding ◽  
Wireless Sensor ◽  
Linear Predictive Coding ◽  
Formant Frequency ◽  
Tool Holder ◽  
Milling Tool ◽  
High Bandwidth

A method is demonstrated to estimate chatter frequencies in real time from cutting torque data using formant frequency tracking. Formant frequencies are derived from the torque data using linear predictive coding (LPC) methods, similar to algorithms used in speech recognition. The estimated frequency response is observed to change throughout a cut as a function of both engagement and cut geometry. Torque data is collected at high bandwidth from a wireless sensor integrated end milling tool holder. The technique is found to be effective and repeatable for forecasting regenerative chatter frequencies in real time. Chatter frequencies predicted during non-chatter conditions correctly estimate the actual chatter condition. To demonstrate the technique, a number of experimental cuts are conducted and discussed.

Development of Analytical Endmill Deflection and Dynamics Models

Manufacturing ◽  
2003 ◽  
Author(s):  
Evren Burcu Kivanc ◽  
Erhan Budak
Keyword(s):  
Dynamic Properties ◽  
Machining Process ◽  
Element Analysis ◽  
Static And Dynamic Analysis ◽  
Tool Holder ◽  
Receptance Coupling ◽  
Milling Tool ◽  
The Individual ◽  
Stiffness And Damping ◽  
Dynamics Models

Accurate knowledge of machine dynamics is required for predicting stability and precision in a machining process. Frequency response function (FRF) measurements need to be performed to identify the dynamics of the systems experimentally. This can be very time consuming considering the number of tool-tool holder combinations in a production facility. In this paper, methods for modelling dynamics of milling tool is presented. Static and dynamic analysis of tools with different geometry and material are carried out by Finite Element Analysis (FEA). Some practical equations are developed to predict the static and dynamic properties of tools. Receptance coupling and substructuring analyses are used to combine the dynamics of individual component dynamics. In this analysis, experimental or analytic FRFs for the individual components are used to predict the final assembly’s dynamic response. The critical point in this analysis is to identify the interface stiffness and damping between the tool and tool holder. The effects of changes in tool parameters and clamping conditions are evaluated. The predictions are verified by measurements.

Correction of milling tool paths by tool positioning defect compensation

2003 ◽  
Vol 217 (8) ◽  
pp. 1063-1073 ◽  
Author(s):  
Y Landon ◽  
S Segonds ◽  
M Mousseigne ◽  
P Lagarrigue
Keyword(s):  
Spindle Assembly ◽  
Tool Holder ◽  
Tool Paths ◽  
Tool Positioning ◽  
Theoretical Position ◽  
Geometrical Features ◽  
Milling Tool ◽  
Milling Operation ◽  
Virtual Worker ◽  
Operation Characteristics

In considering errors due to elastic deformations in milling, the workpiece-work-holding fixture assembly is generally considered to be infinitely rigid, at least when the geometrical features so permit. The tool-tool-holder-spindle assembly and the machine axes are then deformed under the action of the cutting forces. This deformation leads to a positioning defect of the tool in relation to the theoretical position. With the aim of taking this positioning defect into account in manufacturing, a ‘Virtual Worker’ was implemented that was capable of predicting this defect, in relation to the type of machining, and of compensating for it. It was built on a set of data blocks drawn up for each tool. In order to fill in these tool data blocks quickly, a master workpiece was elaborated that brought together the milling operation characteristics for the tool's behaviour at work. By milling and then measuring this master workpiece, the behaviour of the tool-tool-holder-spindle assembly was able to be fully characterized at work.

Three-axial cutting force measurement in micro/nano-cutting by utilizing a fast tool servo with a smart tool holder

CIRP Annals ◽  
2021 ◽  
Author(s):  
Yuan-Liu Chen ◽  
Fuwen Chen ◽  
Zhongwei Li ◽  
Yang Zhang ◽  
Bingfeng Ju ◽  
...  
Keyword(s):  
Cutting Force ◽  
Force Measurement ◽  
Fast Tool Servo ◽  
Tool Holder ◽  
Cutting Force Measurement

Investigation of microstructured milling tool for deferring tool wear

Wear ◽  
2011 ◽  
Vol 271 (9-10) ◽  
pp. 2433-2437 ◽  
Author(s):  
Wenlong Chang ◽  
Jining Sun ◽  
Xichun Luo ◽  
James M. Ritchie ◽  
Chris Mack
Keyword(s):  
Tool Wear ◽  
Milling Tool

scholarly journals Optimization and Tuning of Passive Tuned Mass Damper Embedded in Milling Tool for Chatter Mitigation

2020 ◽  
Vol 5 (1) ◽  
pp. 2
Author(s):  
Wenshuo Ma ◽  
Jingjun Yu ◽  
Yiqing Yang ◽  
Yunfei Wang
Keyword(s):  
Tuned Mass Damper ◽  
Structural Features ◽  
Milling Process ◽  
Diameter Ratio ◽  
Depth Of Cut ◽  
Receptance Coupling ◽  
Milling Tool ◽  
Mass Damper ◽  
Large Length ◽  
Deep Depth

Milling tools with a large length–diameter ratio are widely applied in machining structural features with deep depth. However, their high dynamic flexibility gives rise to chatter vibrations, which results in poor surface finish, reduced productivity, and even tool damage. With a passive tuned mass damper (TMD) embedded inside the arbor, a large length–diameter ratio milling tool with chatter-resistance ability was developed. By modeling the milling tool as a continuous beam, the tool-tip frequency response function (FRF) of the milling tool with TMD was derived using receptance coupling substructure analysis (RCSA), and the gyroscopic effect of the rotating tool was incorporated. The TMD parameters were optimized numerically with the consideration of mounting position based on the maximum cutting stability criterion, followed by the simulation of the effectiveness of the optimized and detuned TMD. With the tool-tip FRF obtained, the chatter stability of the milling process was predicted. Tap tests showed that the TMD was able to increase the minimum real part of the FRF by 79.3%. The stability lobe diagram (SLD) was predicted, and the minimum critical depth of cut in milling operations was enhanced from 0.10 to 0.46 mm.

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