Parameters for CMM contact measurements of free-form surfaces

• Autorzy: Poniatowska M.
• Języki publikacji: EN

Abstrakty

EN

Obtaining discrete data is inseparably connected with losing information on surface properties. In contact measurements, the ball tip functions as a mechanical-geometrical filter. In coordinate measurements the coordinates of the measurement points of a discrete distribution on the measured surface are obtained. Surface geometric deviations are represented by a set of local deviations, i.e. deviations of measurement points from the nominal surface (the CAD model), determined in a direction normal to this surface. The results of measurements depend both on the ball tip diameter and the grid size of measurement points. This article presents findings on the influence of the ball tip diameter and the grid size on coordinate measurement results along with the experimental results of measurement of a free-form milled surface, in order to determine its local geometric deviations. One section of the surface under research was measured using different measurement parameters. The whole surface was also scanned with different parameters, observing the rule of selecting the tip diameter d and the sampling interval T in the ratio of 2:1.

Słowa kluczowe

EN

coordinate measurements; free-form surface; geometric deviations; measurement parameters

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2011
• Tom: Vol. 18, nr 2
• Strony: 199--207
• Opis fizyczny: Bibliogr. 14 poz., rys., tab., wykr.

Twórcy

autor

Poniatowska M.

• Bialystok University of Technology, Division of Production Engineering, Wiejska 45C, 15-351 Bialystok, Poland,

Bibliografia

• [1] PN-EN ISO 1101:2006. Geometrical Product Specifications (GPS) - Geometrical tolerancing - Tolerances of form, orientation, location and run-out.
• [2] Adamczak, S. (2008). Surface geometric measurements. Warsaw: WNT. (in Polish)
• [3] Badar, M.A., Raman, S., Pulat, P.S. (2008). Experimental verification of manufacturing error pattern and its utilization in form tolerance sampling. Int. J. Mach. Tools Manuf., 43, 63-73.
• [4] Ainsworth, I., Ristic, M., Brujic, D. (2000). CAD-based Measurement Path Planning for Free-Form Shapes Using Contact Probes. Int. J. Adv. Manuf. Technol., 16, 23-31.
• [5] Elkott, D.F., Elmaraghy, H. A., Elmaraghy, W.H. (2002). Automatic sampling for CMM inspection planning of free-form surfaces. Int. J. Res., 40, 2653-2676.
• [6] Dong, W.P. Mainsah, E. Stout, K.I. (1996). Determination of appropriate sampling conditions for threedimensional microtopography measurement. Int. J. Mach. Tools Manuf., 36, 1347-1362.
• [7] Adamczak, S., Makieła, W. Stępień, K. (2010). Investigating advantages and disadvantages of the analysis of a geometrical surface structure with the use of Fourier and wavelet transform. Metrology and Measurement Systems, 17(2), 233-244.
• [8] Boryczko, A. (2010). Distribution of roughness and waviness components of turned surface profiles. Metrology and Measurement Systems, 17(4), 611-620.
• [9] Poon, C.Y., Bhushan, B. (1995). Comparison of surface measurement by stylus profiler, AFM and noncontact optical profiler. Wear, 190, 76-88.
• [10] Bettge, D., Starcevic, J. (2001). Quantitative description of wear surfaces of disk brakes using interference microscopy. Wear, 248, 121-127.
• [11] Pawlus, P. (2007). Digitisation of surface topography measurement results. Measurement, 40, 72-686.
• [12] Pawlus, P. (2007). Mechanical filtration of surface profiles. Measurement, 35, 325-341.
• [13] Szabatin, J. (2003). Signal theory fundamentals. Warsaw: WKŁ. (in Polish)
• [14] Poniatowska, M., Werner, A. (20101). Fitting spatial models of geometric deviations of free-form surfaces determined in coordinate measurements. Metrology and Measurement Systems, 17(4), 599-610.