Synthesization of thermally induced errors in coordinate measuring machines



Document title: Synthesization of thermally induced errors in coordinate measuring machines
Journal: Journal of the Brazilian Society of Mechanical Sciences and Engineering
Database: PERIÓDICA
System number: 000312306
ISSN: 1678-5878
Authors: 1

Institutions: 1Universidade de Sao Paulo, Escola de Engenharia de Sao Carlos, Sao Carlos, Sao Paulo. Brasil
Year:
Season: Abr-Jun
Volumen: 27
Number: 2
Pages: 170-177
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental
English abstract This work presents the equations for the components of the volumetric error of a Coordinate Measuring Machine (CMM) considering thermal influences. These equations were applied to a moving bridge CMM and combines homogeneous transformations, regression techniques and least squares algorithm. The magnitudes of both the geometric errors and its thermally induced variations were collected by means of a Laser interferometric system, a mechanical square and an electronic level. Simultaneously, temperature values were monitored using T-type Copper-Constantan thermocouples. From the proposed model, components of the volumetric errors were synthesized. Results are discussed and compared to the ones obtained from measurement sets of a ring gauge. It was verified that the model presented an excellent ability to predict volumetric error of the CMM. Errors of about 10µm in magnitude were reduced by at least 75%, while for errors greater than 10µm, the efficiency of the model was 90%
Disciplines: Ingeniería
Keyword: Ingeniería de control,
Ingeniería mecánica,
Temperatura,
Errores,
Algoritmos
Keyword: Engineering,
Control engineering,
Mechanical engineering,
Thermal drift,
Errors,
Temperature
Full text: Texto completo (Ver PDF)