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Variable stiffness probing systems for micro-coordinate measuring machines

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journal contribution
posted on 27.05.2016, 09:18 by Khalid Alblalaihid, Simon Lawes, Peter KinnellPeter Kinnell
Micro-scale probing systems are used on specialist micro-coordinate measuring machines to measure small, intricate and fragile components. Probe stiffness is a critical property of micro-scale probing systems; it influences contact force, robustness, ease of manufacture, accuracy and dynamic response. Selecting the optimum stiffness, therefore, represents a significant design challenge, and often leads to undesirable compromises. For example, when contacting fragile surfaces the probe stiffness should be low to prevent damage; however, for a more robust probing system the stiffness should be increased. This paper presents a novel concept for micro-scale probing systems with the ability to quickly and easily change and control probe stiffness during use. The intended strategy for using the proposed probe is first explained. Then the new concept is fully defined and explored through a combination of finite element analysis and experimental results. Two possible configurations of probe are described, and models for predicted performance for each are presented and compared. The models demonstrate significant stiffness reduction is possible with the proposed concept, and show it is theoretically possible to achieve a probing system with perfectly isotopic stiffness.

Funding

The authors wish to acknowledge the funding contribution from the Saudi Arabian cultural bureau in London.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY

Volume

43

Pages

262 - 269 (8)

Citation

ALBLALAIHID, K., LAWES, S. and KINNELL, P., 2016. Variable stiffness probing systems for micro-coordinate measuring machines. Precision Engineering, 43, pp. 262-269.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2016

Notes

This paper was accepted for publication in the journal Precision Engineering and the definitive published version is available at http://dx.doi.org/10.1016/j.precisioneng.2015.08.004

ISSN

0141-6359

Language

en

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