STUDY CONCERNING THE INFLUENCE OF MILLING PARAMETERS UPON THE SURFACE QUALITY

Adriana FOTIN
Sef lucr.dr.ing. - Universitatea TRANSILVANIA din Brasov - Facultatea de Industria Lemnului
Address: B-dul Eroilor nr. 29, 500036 Brasov, Romania
Tel: +40 268 412921/192. Fax: +40 268 415315.
E-mail: adrianafotin@unitbv.ro

Ivan CISMARU
Prof.dr.ing. - Universitatea TRANSILVANIA din Brasov - Facultatea de Industria Lemnului
E-mail: icismaru@unitbv.ro

Maria CISMARU
Prof.dr.ing. - Universitatea TRANSILVANIA din Brasov - Facultatea de Industria Lemnului
E-mail: mcismaru@unitbv.ro

Emilia-Adela SALCA
Sef lucr.dr.ing. - Universitatea TRANSILVANIA din Brasov - Facultatea de Industria Lemnului
E-mail: emilia.salca@unitbv.ro

Abstract: This paper presents a comparative study concerning the surface quality resulted after processing birch wood in longitudinal and transverse direction by means of two cutters with removable plates from sintered metal carbide, with different diameters: D80 mm, D120 mm. The variable parameters of the processing regime were: cutter diameter, speed, feed speed, cutting depth and cutting width.
       The study was based on assessing the quality of the processed surfaces by comparative analysis of the roughness parameters Ra, Rk and Rpk, derived from roughness measurements along the cutting direction, by using an optical profilometer FRT (Fries Research Technology) made in Germany.
       After conducting the experimental research, it could be concluded that the best surfaces, obtained through milling in longitudinal direction are obtained when using cutters with larger diameters.
       The results of this research were used to formulate optimised processing regimes, through which very good surfaces can be obtained. In this way, the attitude of specialists from the wood industry regarding the Betula pendula (birch) wood species can be changed, by promoting its use on extensive scale and this way offering the possibility of broadening the raw material range of our country.

Key words: birch, longitudinal milling, transverse milling, roughness parameters, cutter diameter, removable plates.

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*** ISO 4287: 2001. Specificatii geometrice pentru produse. Starea suprafetei: Metoda profilului. Termeni. Definitii si parametri de stare a suprafetei. (Geometrical Product Specification. Surface Texture: Profile Method. Terms. Definitions and Surface Texture Parameters). ASRO.
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