Helix milling application
A major focus in milling operations is on reducing the machining time. With specific tool geometries for machining closed, round pockets, it is often possible to eliminate the pre-drilling process. With helix milling, milling paths are programmed with helical entrances that are suitable for pocket dimensions.
Tool overview for the following machining steps:
Sgrossatura
L’operazione di sgrossatura è responsabile di gran parte del volume di truciolatura. Speciali strategie di fresatura come la lavorazione ad alto avanzamento o la fresatura trocoidale sono in grado di ridurre il tempo di lavorazione e quindi di aumentare la redditività. Oltre agli utensili con inserti a fissaggio meccanico e alle frese in metallo duro integrale, vengono impiegate anche frese ad alte prestazioni con una speciale geometria di sgrossatura.
Residual material roughing
After roughing, in a second machining step, users machine the residual material, especially in corners and cavities, removing material as constantly as possible. Usually tools with corner radius or high-feed milling cutters are used. In some cases a ball cutter can be used to remove the residual material in corners.
Pre-finishing
If there are high demands on dimensional accuracy and surface finish, semi-finishing is recommended before finishing. With pre-finishing, machining approaches the final mould profile. The aim is to obtain a residual material that is as constant as possible in order to enable fast finishing with high demands on the surface quality. The stock removal after roughing is approx. 0.5-1 mm for hardened materials and 0.03-0.5 mm for soft materials. After pre-finishing, the constant stock removal is 0.05-0.1 mm for hardened materials or 0.1-0.3 mm for soft materials.
Finition
L'usinage de finition enlève la surépaisseur restante pour obtenir la forme finale. Après la semi-finition, la valeur est de 0,05-0,1 mm pour les matériaux trempés et de 0,1-0,3 mm pour les matériaux tendres. Les fraises sphériques et/ou fraise rayonnée sont le moyen de choix, en fonction des contours finaux de la pièce.
