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Research Papers

Identification of a Lathe Spindle Dynamics Using Extended Inverse Receptance Coupling

[+] Author and Article Information
Marcin Jasiewicz

Faculty Mechanical Engineering and
Mechatronics,
West Pomeranian University of Technology
Szczecin,
19 Piastow Avenue,
Szczecin 70-310, Poland
e-mail: marcin.jasiewicz@zut.edu.pl

Bartosz Powałka

Faculty Mechanical Engineering
and Mechatronics,
West Pomeranian University of Technology
Szczecin,
19 Piastow Avenue,
Szczecin 70-310, Poland
e-mail: bartosz.powalka@zut.edu.pl

1Corresponding author.

Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT,AND CONTROL. Manuscript received October 25, 2017; final manuscript received July 17, 2018; published online August 16, 2018. Assoc. Editor: Yang Shi.

J. Dyn. Sys., Meas., Control 140(12), 121015 (Aug 16, 2018) (11 pages) Paper No: DS-17-1543; doi: 10.1115/1.4040968 History: Received October 25, 2017; Revised July 17, 2018

In order to ensure machining stability, it is essential to properly determine the dynamic properties of machine tool–workpiece system. Experimental modal analysis provides good results; however, due to high time consumption, in some cases, its use is not practically justified. Then, a receptance coupling method can be used, that allows for the synthesis of the experimental models of the machine tool components and analytical models of the workpiece. However, a significant disadvantage of this method is the need for the experimental identification of the rotational degrees-of-freedom, fully defining dynamic properties of the spindle. This paper presents an improved method based on inverse receptance coupling, which enables effective identification of the spindle dynamics with the properties of the joint. Then, a measurement procedure and results of the experimental validation are presented.

Copyright © 2018 by ASME
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References

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Figures

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Fig. 1

Considered system (a) coupled system and (b) components

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Fig. 2

The coupled system—spindle–workpiece

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Fig. 3

Measurement points distribution on rod setup

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Fig. 5

Testing object—lathe AFM TAE 35N

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Fig. 6

Measurement cycle—impact testing

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Fig. 7

Determination of the translational FRFs of the spindle

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Fig. 8

Rod setup mode shapes

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Fig. 9

Measured FRFs at free end: (a) rod setup 1, (b) rod setup 2, (c) rod setup 3, and (d) rod setup 4

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Fig. 10

Spindle FRFs evaluated from all four rod setups

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Fig. 11

Validation procedure

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Fig. 12

Initial validation of the workpiece setup 1 FRFs evaluated experimentally and by receptance coupling: (a) first beam mode frequency range and (b) second beam mode frequency range

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Fig. 13

Proposed procedure of the lathe spindle dynamics evaluation using the extended inverse receptance coupling method

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Fig. 14

The FRFs of the spindle with joint obtained using proposed EIRC method

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Fig. 15

Comparison of the FRFs of the workpiece setup 1—experimental, standard IRC and proposed EIRC: (a) first beam mode frequency range and (b) second beam mode frequency range

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Fig. 16

Frequency response functions validation—experimental data and receptance coupling with the spindle by EIRC

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