Thermally compensated test piece for coordinate measuring...

G - Physics – 01 – B

Patent

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G01B 21/04 (2006.01) G01B 1/00 (2006.01) G01B 3/30 (2006.01)

Patent

CA 2476753

The invention relates to a test piece that comprises at least two shaped probe elements (12) and at least one connecting element (11) for connecting the at least two shaped probe elements. Each connecting element is provided with at least one fastening element for fastening a shaped probe element to an end of the connecting element. The test piece is thermally compensated, i.e. the distance of the shaped probe elements (12) remains constant across a wide temperature range. Thermal compensation is ensured by the fastening element for which, for example, only materials having a positive coefficient of thermal expansion can be used.

L'invention concerne une éprouvette comprenant au moins deux éléments palpeurs profilés (12) et au moins un élément de jonction (11) permettant la jonction des deux éléments palpeurs précités, chaque élément de jonction présentant au moins un élément de fixation, permettant de fixer un élément palpeur profilé à une extrémité de l'élément de jonction. L'éprouvette est à compensation thermique, c'est-à-dire que la distance de l'élément palpeur profilé (12) demeure constante dans un vaste intervalle de température. La compensation thermique s'effectue par l'élément de fixation, élément pour lequel on ne peut utiliser, par exemple, que des matériaux ayant un coefficient de dilatation thermique positif.

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