Retrofitting of special machine tool for mass production of screw drivers

Velikoserijska proizvodnja odvijača može se ostvariti postupcima oblikovanja deformiranjem, obrade odvajanjem ili kombinacijom ovih postupaka. Iako je zahtijevanu proizvodnost moguće postići s oba postupka, u slučajevima uskog tolerancijskog područja dimenzija i oblika, prednost imaju postupci obrade odvajanjem. Da bi se postigla veća proizvodnost, često se za tu namjenu konstruiraju specijalni alatni strojevi. U teoretskom dijelu rada opisan je postupak okretnog glodanja, dan je pregled različitih načina ostvarivanja posmičnog prigona kod alatnih strojeva te su detaljno objašnjeni specijalni alatni strojevi. Praktični dio rada obuhvaća proračun i odabir odgovarajućih komponenti glavnog i posmičnog gibanja, izradu 3D modela specijalnog alatnog stroja u CAD/CAM sustavu Catia te prikaz simulacije obrade odvijača.Mass production of screw drivers can be achieved using cutting processes, forming processes or by combination of these processes. Although, required manufacturing rate can be achieved using either cutting or forming processes, metal cutting process have advantage in conditions of high dimension and shape accuracy requirements. To achieve higher manufacturing rate, special machine tools are designed. In theoretical part of the thesis, mill-turn process is described, review of different machine feed drives is given and usage and design of special machine tools is described. Practical part of the thesis covers calculations and choosing feed and main drives components, making 3D model of special tool machine in CAD/CAM Catia system and simulation of screw driver manufacturing process