A stochastic model for volumetric errors

Autor(es)

Rosenda A. Valdés ; Denise P. V. Sato ; Roxana M. Martinez Orrego ^[3]

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Society of Mechanical Sciences and Engineering; v. 28, n. 2, p. 161-168, 2006-06-00.

Resumo

The present work aims to determine mathematical equations that describe the behavior of the components of the volumetric error in Three Coordinates Measuring Machines (3CMM). A general methodology using techniques of multiple regressions is presented. Such methodology, applied to a moving bridge type 3CMM, has made it possible to obtain, in a simple way, three regression equations from data collected through a direct calibration procedure, more specifically, the space grid method. The proposed model was statistically and experimentally evaluated. The statistic evaluation covers the calculation of the correlation coefficient of the samples, a residue analysis and the hypothesis verification. The experimental evaluation was made through the comparison of results expected by the model with the results obtained from the measurements of a ball bar. From these results, it is possible to verify that the model is adequate and that it is good in predicting volumetric errors in the machine. (AU)

• Processo FAPESP: 03/00709-8 - Expressao da incerteza de medicao a tres coordenadas.
• Beneficiário: Rosenda Valdés Arencibia
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado