Prediction of frequency response function (FRF) of asymmetric tools from the analytical coupling of spindle and beam models of holder and tool

Özşahin, Orkun; Altintaş, Yusuf

doi:10.1016/j.ijmachtools.2015.03.001

Cited by 43 publications

(10 citation statements)

References 15 publications

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“…Literature provides several approaches for identifying joint parameters. Some of them are: manual or visual tuning of parameters [13,21], parameter variation [1] and curve fitting or non-linear optimization [9,15]. The objective function for these approaches has been to reduce the difference between the predicted and measured amplitudes within a frequency range.…”

Section: Joint Parameter Identificationmentioning

confidence: 99%

“…It was observed that the amplitude of the resonance frequencies in this state is extremely sensitive to the quality of impact and measurement setup such that a consistent estimation of joint damping was not possible. Hence, literature values for joint damping [13] were used as starting values in this study and adjusted manually. Taking these values and the identified joint stiffness, the one-segment beam was elastically coupled with the holder.…”

Section: Joint Identification and Analysismentioning

confidence: 99%

“…Several approaches are available in literature for modelling this contact stiffness and damping. A number of authors proposed using a spring-damper element acting between the holder and overhanging tool to represent this joint [6,11,13,18]. Such an element provides additional compliance and equivalent viscous damping caused by the joint contact stiffness and columbic damping.…”

Section: Introductionmentioning

confidence: 99%

“…Irrespective of the method employed for modelling the joint, the parameters of the joint model are obtained in majority of approaches by comparing the predicted tool tip FRF with an experimentally obtained tool tip FRF of the tool clamped in a machine spindle [1,6,13,15,21]. Subsequently, the error between prediction and measurement is minimized by varying the joint parameters (usually translational, rotational stiffness and equivalent viscous damping factors).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Efficient joint identification and fluted segment modelling of shrink-fit tool assemblies by updating extended tool models

Brecher

Chavan

Fey

2020

Prod. Eng. Res. Devel.

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In milling, the dynamic behavior of the tool center point is crucial for estimating surface quality of the workpiece as well as the process stability behavior. Experimental-analytical receptance coupling can be used for predicting the tool tip dynamics but requires accurate analytical modelling of the holder-tool assembly. This includes the reliable identification of the holder-tool joint properties as well as the correct modelling of the fluted segment of end mills. However, the modelling effort associated with accurately representing the dynamic behavior of the fluted segment is significant. In addition, the joint identification requires a reference tool tip frequency response function of the tool assembly clamped in the machine spindle. This is inefficient and can also lead to incorrect estimation of joint properties. This paper provides an efficient method for joint identification and fluted section modelling using an offline, free–free excitation approach. The objective of this paper is to enable a direct comparison of the dynamic behavior of the freely constrained analytical tool assembly model with that of the real freely constrained tool assembly. The comparison of displacement to force frequency response at certain points on the tool assembly allows for the identification of tool model parameters such as the joint properties and effective diameter of the fluted segment. The comparability is realized by extending the analytical holder-tool beam model to include the receptance model of the standard spindle-holder interface. In this study, as an example, a thermal shrink-fit holder-tool beam model is extended to include an HSK-A63 interface. Subsequently, frequency response functions at two points on the real freely constrained tool assembly are measured in order to identify the joint stiffness and effective diameter of the fluted segment using the corresponding proposed formulations. The updated holder-tool model is then coupled with a 4-axis milling machine and validated. Despite the reduced modelling effort, a good prediction accuracy could be achieved for different holder-tool combinations.

show abstract

Section: Joint Parameter Identificationmentioning

confidence: 99%

Section: Joint Identification and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Efficient joint identification and fluted segment modelling of shrink-fit tool assemblies by updating extended tool models

Brecher

Chavan

Fey

2020

Prod. Eng. Res. Devel.

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show abstract

“…The analytical approximation of flute geometry is further used by Mancisidor et al [15], where a new Timoshenko beam model was proposed by use of the fixed boundaries approach as opposed to the use of free-free response of the cutting tool body. Then, Ozsahin and Altintas [16] studied the tool tip FRF prediction for tools having asymmetrical geometry such as 2-fluted ones. They showed the effect of cutting flute geometry on the FRF for asymmetrical tools in two orthogonal directions, i.e., x and y.…”

Section: Introductionmentioning

confidence: 99%

Prediction of tool tip dynamics for generalized milling cutters using the 3D model of the tool body

Tunç

2017

Int J Adv Manuf Technol

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Your article is protected by copyright and all rights are held exclusively by Springer-Verlag London Ltd.. This e-offprint is for personal use only and shall not be selfarchived in electronic repositories. If you wish to self-archive your article, please use the accepted manuscript version for posting on your own website. You may further deposit the accepted manuscript version in any repository, provided it is only made publicly available 12 months after official publication or later and provided acknowledgement is given to the original source of publication and a link is inserted to the published article on Springer's website. The link must be accompanied by the following text: "The final publication is available at link.springer.com".

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An efficient experimental approach to identify tool point FRF by improved receptance coupling technique

Liao

Zhang

et al. 2017

Int J Adv Manuf Technol

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Prediction of frequency response function (FRF) of asymmetric tools from the analytical coupling of spindle and beam models of holder and tool

Cited by 43 publications

References 15 publications

Efficient joint identification and fluted segment modelling of shrink-fit tool assemblies by updating extended tool models

Efficient joint identification and fluted segment modelling of shrink-fit tool assemblies by updating extended tool models

Prediction of tool tip dynamics for generalized milling cutters using the 3D model of the tool body

An efficient experimental approach to identify tool point FRF by improved receptance coupling technique

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