THE ROUGHNESS OF WOOD SURFACES INTERPRETED THROUGH TWO MEASURING METHODS

Luminita-Maria BRENCI
Lecturer dr.Eng. - Universitatea "Transilvania" din Brasov - Facultatea de Industria Lemnului
Address: B-dul Eroilor nr. 29, 500036 Brasov, Romania
Tel: +40 268 412921/int.192. Fax: +40 268 415315
E-mail: brenlu@unitbv.ro

Ivan CISMARU
Prof.dr. Eng. - Universitatea "Transilvania" din Brasov - Facultatea de Industria Lemnului
Address: B-dul Eroilor nr. 29, 500036 Brasov, Romania
Tel: +40 268 412921/int.192. Fax: +40 268 415315
E-mail: icismaru@unitbv.ro

Camelia BOIERIU
Lecturer dr.Eng.- Universitatea "Transilvania" din Brasov - Facultatea de Industria Lemnului
Address: B-dul Eroilor nr. 29, 500036 Brasov, Romania
Tel: +40 268 412921/int.192. Fax: +40 268 415315
E-mail: cboieriu@unitbv.ro

Abstract: The present paper treats the way of interpreting the roughness of wood surfaces, measured on veneers obtained from two species of wood: beech and oak. The comparative study was performed by measuring the roughness with two different apparatus: the first one with stylus contact and the second one, an optical system, with light beam (contact less). The results obtained with the two apparatus have shown that the optical method gives more accurate data about the roughness of the surface, because in the measured value the anatomical structure of the wood is also included.

Key words: roughness, wooden surface, veneer, stylus method, optical method, light beam.

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*** EN ISO 4287:1997 - Geometrical Product Specification (GPS) - Surfaces Texture: Profile Method - Terms, Definition.
*** SR EN 4287:1997 Geometrical Product Specification (GPS) - Surface Texture: Profile Method - Terms, Definition and Surfaces Texture Parameters.
*** SR EN ISO 11562:1999 Geometrical Product Specification (GPS) - Surface Texture: Profile Method - Metrological Characteristics Of Phase Correct Filter.
*** SR EN ISO 13565-1:1999 Geometrical Product Specification (GPS) - Surface Having Strainfield Functional Properties. Part 1: Filtering and General Measurement Conditions.
*** SR EN ISO 13565-2:1999 Geometrical Product Specification (GPS) - Surface Having Strainfield Functional Properties. Part 2: Height Characterization Using the Linear Ratio Curve.
*** SR EN ISO 13565-1:1999 Geometrical Product Specification (GPS) - Measurement Standards Part 1: Material Measures.
*** SR EN ISO/CEI 17025:2005 - Cerinte generale pentru competenta laboratoarelor de incercari si etalonari (General Requirements for the Competences of Testing and Gauging Laboratories).