Effect of Clamped Toolholders on Dynamic Characteristics of Spindle System of Machining Center

Haruhisa Sakamoto; Taiga Matsuda; Shinji Shimizu

doi:10.20965/ijat.2012.p0168

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IJAT Vol.6 No.2 pp. 168-174

doi: 10.20965/ijat.2012.p0168

(2012)

Paper:

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Effect of Clamped Toolholders on Dynamic Characteristics of Spindle System of Machining Center

Haruhisa Sakamoto^*, Taiga Matsuda^**,
and Shinji Shimizu^*

^*Sophia University, 7-1, Kioi-cho, Chiyoda-ku, Tokyo, Japan

^**Nihon Kohden Corporation, 3-14-20, Higashi Nakano, Nakano-ku, Tokyo, Japan

Received:

September 11, 2011

Accepted:

December 13, 2011

Published:

March 5, 2012

Keywords:

machine tool, spindle, tooling system, chucking mechanism, dynamic characteristics, impulse response method

Abstract

In this study, dynamic characteristics are determined based on the impulse response method, the correction of discretization errors and the identification of equivalent physical parameters, as found in the vibration model having one degree of freedom. In the experiments, the test tool is cylindrical bar shaped and made from solid tungsten carbide, and four toolholders with chucking mechanisms, including the shrinkfit type, collet type, hydraulic type, and press-fit type, are used. Since it had been previously confirmed that one of the tool preparation jigs had dynamic characteristics similar to those of an actual machine tool’s spindle, the dynamic characteristics of the jig could be measured the way the spindle system is measured in this study. From the experimental examinations, the following were clarified. (1) Chucking of the tooling system enhances the first mode vibration of the spindle system markedly. (2) The type of tool chuck used changes the dynamic characteristics of the spindle system. The trend in the dynamic stiffness corresponds well with that in the equivalent damping coefficient but is opposite to that in the equivalent stiffness. (3) The magnitude order of the dynamic characteristic parameters of the spindle system corresponds well with the inherent values of the dynamic characteristic parameters of the toolholders themselves; that is, the inherent dynamic characteristics of the tooling system can be used as the criteria to estimate the effect on the dynamic characteristics of the spindle system.

Cite this article as:

H. Sakamoto, T. Matsuda, and S. Shimizu, “Effect of Clamped Toolholders on Dynamic Characteristics of Spindle System of Machining Center,” Int. J. Automation Technol., Vol.6 No.2, pp. 168-174, 2012.

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References

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[6] J. Destefani, “Holding the Precision line – A look at toolholder technologies for high-precision machining, and how to choose the system that’s right for you,” Manuf. Eng., Vol.128, No.5, pp. 55-64, 2000.
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[8] H. Sakamoto et al, “Quantification evaluation method of bending stiffness characteristics of milling chucks,” J. of JSPE,C edition, Vol.77, No.782. (will be published in 2011) (in Japanese)
[9] H. Sakamoto et al. “Examination of Method of Quantification of Dynamic Characteristic Parameters of Tooling System Based on Impulse Response,” Proc. of 5th Int. Conf. on Leading Edge Manufacturing in 21st Century, 2009.
[10] S. Wakui, “Relationship between Parameter Estimation method Based on Bode Diagram and Co-quad Diagram,” Journal of the Japan Society for Precision Engineering, Vol.63, No.4, pp. 570-574, 1997. (In Japanese)

This article is published under a Creative Commons Attribution-NoDerivatives 4.0 Internationa License.

[1] [1] M. A. Davies, T. L. Schmitz and B. S. Dutterer, “How to Succeed at HSM,” Manuf. Eng., Vol.126, No.3, pp. 90-96, 2001.

[2] [2] J. Israelsson and S. Piscopo, “Machining Mold and Dies at High Speed,” Manuf. Eng., Vol.125, No.3, 2000, pp. 148-157.

[3] [3] M. Weck and I. Schubert, “New Interface Machine/Tool: Hollow Shank,” CIRP Ann., Vol.43, No.1, pp. 345-348, 1994.

[4] [4] E. Kocherovsky, “An HSK Primer,” Manuf. Eng., Vol.124, No.5, pp. 66-72, 2000.

[5] [5] E. I. Rivin, “Tooling Structure: Interface between Cutting Edge and Machine Tool,” CIRP Ann., Vol.49, No.2, pp. 591-634, 2000.

[6] [6] J. Destefani, “Holding the Precision line – A look at toolholder technologies for high-precision machining, and how to choose the system that’s right for you,” Manuf. Eng., Vol.128, No.5, pp. 55-64, 2000.

[7] [7] S. Shimizu and H. Sakamoto, “Effect of Form Error of Tool on Chucking Accuracy,” Proc. of International Conference on Leading Edge Manufacturing in 21st Century, pp. 589-594, 2003.

[8] [8] H. Sakamoto et al, “Quantification evaluation method of bending stiffness characteristics of milling chucks,” J. of JSPE,C edition, Vol.77, No.782. (will be published in 2011) (in Japanese)

[9] [9] H. Sakamoto et al. “Examination of Method of Quantification of Dynamic Characteristic Parameters of Tooling System Based on Impulse Response,” Proc. of 5th Int. Conf. on Leading Edge Manufacturing in 21st Century, 2009.

[10] [10] S. Wakui, “Relationship between Parameter Estimation method Based on Bode Diagram and Co-quad Diagram,” Journal of the Japan Society for Precision Engineering, Vol.63, No.4, pp. 570-574, 1997. (In Japanese)

Effect of Clamped Toolholders on Dynamic Characteristics of Spindle System of Machining Center

Haruhisa Sakamoto*, Taiga Matsuda**, and Shinji Shimizu*

Haruhisa Sakamoto^*, Taiga Matsuda^**,
and Shinji Shimizu^*