INFLUENCE OF THE VARIABLE PARAMETERS OF THE MACHINING REGIMES UPON THE SURFACE QUALITY OBTAINED BY STRAIGHT MILLING

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/int.191. Fax: +40 268 415315.
E-mail: adrianafotin@unitbv.ro

Ivan CISMARU
Prof.dr.ing. - Universitatea "Transilvania" din Brasov - Facultatea de Industria Lemnului
Address: B-dul Eroilor nr. 29, 500036 Brasov, Romania
E-mail: icismaru@unitbv.ro

Emilia-Adela SALCA
Sef.lucr.dr.ing. - Universitatea "Transilvania" din Brasov - Facultatea de Industria Lemnului
Address: B-dul Eroilor nr. 29, 500036 Brasov, Romania
E-mail: emilia.salca@unitbv.ro

Maria CISMARU
Prof.dr.ing. - Universitatea "Transilvania" din Brasov - Facultatea de Industria Lemnului
Address: B-dul Eroilor nr. 29, 500036 Brasov, Romania
E-mail: mcismaru@unitbv.ro

Abstract: This paper presents a study concerning the dependency of the surface quality of birch wood edges obtained by straight milling on the variable parameters of the machining regime. The samples were processed by milling with 3 milling cutters with glued straight plates from CMS, with different diameters, on the vertical milling machine type MNF 10, endowed with mechanical feed device. The variable processing parameters were: cutter diameter, rotation speed, feed speed, cutting depth and cutting width. The roughness of the edge surfaces was measured along the processing direction by using a German optical profilometer FRT (Fries Research Technology). The study focused on the quality evaluation of the resulted straight milled surfaces through analysis of the roughness parameters. The study shows that it is possible to obtain high quality surface of the straight edges after milling by using low feed speeds and low cutting depths, with big cutter diameters and high rotation speeds. The results of this study can contribute to the status rehabilitation of birch wood (Betula pendula), by changing the specialists attitude from this department regarding the use of this wood species for furniture manufacturing on a large scale.

Key words: birch, surface quality, roughness, straight milling, milling cutter diameter, rotation speed, feed speed, cutting depth, cutting width.