CMM Design Based on Fundamental Design Principles

Abstract:

The paper presents an approach concerning the CMM design. The first stage of this research deals with the acquisition and the development of knowledge about the CMM design. The main mechanical design aspects to achieve a high positioning and measuring accuracy are presented and two main objectives are assigned: high repeatability (design for repeatability) and high predictability of the machine response to the main error sources (design for predictability). In the second stage of this research the dynamic errors states for this CMM design have been analyzed. In high-speed measuring processes dynamic errors will have a great influence on the accuracy. This study has been performed by using finite-element analysis (FEA) of the mechanical frame. The total deformation of the mechanical frame for different accelerations of the moving assemblies has been calculated. The major deflections at the probe position due to the accelerations are obtained by using FEA. These results give a prediction about the dynamic error of the CMM.

• Periodical: Advanced Materials Research (Volume 1036)
• Pages: 517-522
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1036.517
• Online since: October 2014
• Authors: Aurel Tulcan*, Liliana Tulcan, Daniel Stan
• Keywords: CMM Architecture, Coordinate Measuring Machine, Design of Experiment (DOE), Dynamic Errors, Finite Element Analysis (FEA), Mechanical Design

References

[1] Coordinate Measuring Machine, Information on http: /share. pdfonline. com.

[2] P. Schellekens, N. Rosielle, H. Vermeulen, M. Vermeulen, S. Wetzels, W. Pril, Design for Precision. Current Status and Trends, Annals of the CIRP, Vol. 47/2 (1998) 557-586.

DOI: 10.1016/s0007-8506(07)63243-0

[3] W.G. Weekers, P.H.J. Schellekens, Assessment of Dynamic Errors of CMMs for Fast Probing, Annals of the CIRP, Vol. 44/1 (1995) 469-474.

DOI: 10.1016/s0007-8506(07)62365-8

[4] T.A.M. Rujil, J. van Eijk, A Novel Ultra Precision CMM Based on Fundamental Design Principles, Proceedings of the ASPE Topical Meeting on Coordinate Measuring Machines, Vol. 29 (2003) 33-38.

[5] K.C. Fan, C.L. Liu, P.T. Wu, Y.C. Chen, W.L. Wang, The Structure Design of a Micro Precision CMM with Abbé Principle, Proceedings of the 35th International MATADOR Conference, Taiwan (2007) 297-300.

DOI: 10.1007/978-1-84628-988-0_67

[6] K.C. Fan, The system and the mechatronics of a pagoda type Micro-CMM, International Journal Nanomanufacturing, Vol. 8, Nos. 1/2 (2012) 67-86.

[7] E. Bennett, W. Weekers, Modern CMM Design Concepts, Information on http: /www. hexagonmetrology. us.

[8] D.W. Chang, A.D. Space, CMM Dynamic Error Analysis, Control and Compensation, Information on http: /www. aspe. net.

[9] D.C. Montgomery, Design and analyses of experiments, 5th edition, John Wiley &Sons, New York, (2001).