[en] The development of more versatile machine tools is addressing the increased market demand for more complex shapes and workpieces with strict tolerances. This has resulted in more complicated kinematics, designed to align the cutting tool with the intricate workpiece surface for its production. New machining operations supported in the advanced kinematics are emerging such as turn-milling operations, in which rotational movements of the workpiece are coupled with conventional milling operations. Turn-milling presents significant advantages over conventional turning: such as lower cutting forces, temperatures, circularity errors, and surface roughness. In addition, tool life is longer, and the operation generates intermittent chips which eliminates the continuous chip nests typical in turning. Despite these advantages however, turn-milling is difficult to operate in the optimal process window because it requires an increased number of process parameters, making their optional selection challenging. The prediction of process performance can be greatly enhanced by modeling, however traditional milling models do not consider turn-milling parameters evidencing the need for specific models for these operations. To address this gap, this thesis presents analytical and numerical models for orthogonal turn-milling operations to determine the uncut chip geometry and predict cutting forces. These models consider workpiece rotation, tool eccentricity, cutting tool profile, and the process kinematics in the accurate determination of the uncut chip geometry. The models were validated theoretically and experimentally presenting good correlation in each of the validation tests. The models were used to confirm the cutting conditions suggested by the cutting tool manufacturer in a real workpiece manufacturing plan. The engineered cutting conditions showed a reduction of 20% in the overall manufacturing time. Additionally, the cutting edges were used more efficiently decreasing the number of inserts needed to finish the part, which in turn reduced the total manufacturing cost.

[eu] Mekanizazio lan mota desberdinak egiteko gai diren makina erremintak garatzeak forma oso konplexuak eta aldi berean tolerantzia estuak dituzten piezen eskaera gero eta handiagoari erantzuten dio. Horrek, erreminta eta landu beharreko piezaren azalera lerrokatu ahal izateko, makinaren zinematika korapilatsuagoa eskatzen du. Zinematika aurreratu hauen bidez mekanizazio eragiketa berriak sortzen ari dira, esate baterako, torneatze-fresatze eragiketetan, ohiko fresaketak dituen mugimenduei piezaren biraketa-mugimendu sinkronizatuak gehitu behar zaizkio. Torneatze-fresatzeak abantaila garrantzitsuak ditu torneaketa konbentzionalaren aurrean: esate baterako, ebaketa-indar, tenperaturak eta biribiltasun akats txikiagoak eta gainazal zimurtasun leunagoa. Gainera, erremintaren bizitza luzeagoa da eta luzera txikiko txirbilak sortzen ditu, torneaketan ohikoak diren txirbil anabasak ekidituz. Hala ere, abantaila horiek gorabehera, torneatze-fresatzean zaila da prozesuaren leiho optimoan funtzionatzea, prozesuak parametro kopuru handiagoa baitu, prozesu honen hautaketa erronka bihurtuz. Prozesu errendimenduaren aurreikuspena asko hobetu daiteke modelizazioarekin, hala ere, fresatze eredu tradizionalek ez dituzte torneatze-fresatze parametro guztiak kontuan hartzen, torneatze-fresatze eredu zehatzen beharra dagoela frogatuz. Hutsune horri aurre egiteko, tesi honek torneatze-fresatze ortogonaleko eragiketen eredu analitikoak eta numerikoak aurkezten ditu, ebakitzen den txirbilaren geometria kalkulatu eta ebaketa-indarrak aurreikusteko. Eredu hauek piezaren biraketa, erremintaren eszentrikotasuna, erremintaren profila eta prozesuaren zinematika kontuan hartzen dituzte ebakitzen den txirbilaren geometria zehaztasunez kalkulatuz. Ereduak era teorikoan eta esperimentalean balioztatu dira, egiaztapen proba bakoitzean korrelazio ona erakutsiz beraien artean. Modeloak erabiliz hautatutako ebaketa baldintzak eta erreminta fabrikatzaileak proposaturikoak konparatu dira pieza baten mekanizazioan. Modeloaren laguntzaz hautatutako ebaketa baldintzek piezaren fabrikazio denbora totala %20 murriztu dute. Gainera, erremintaren ebaketa ertzak modu eraginkorragoan erabili ziren, pieza amaitzeko behar ziren aldaketa kopurua murriztuz, eta horrek fabrikazioaren kostu totala murrizten zuen.