Aplicação de fresagem helicoidal
Um foco principal nas operações de fresagem é a redução do tempo de usinagem. Com geometrias de ferramentas específicas para usinagem de bolsos fechados e redondos, muitas vezes é possível eliminar o processo de pré-perfuração. Na fresagem helicoidal, os caminhos de ferramentas são programados com entradas helicoidais adequadas para dimensões de bolso.
Visão geral das ferramentas para as seguintes etapas de usinagem:
Usinagem de desbaste de componentes
Roughing operations are responsible for most of the chip removal capacity. Special milling strategies such as high-feed machining or trochoidal milling can reduce machining time and thus increase profitability. In addition to tools with indexable inserts and solid carbide milling cutters, high-performance milling cutters with special roughing geometry are used.
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.
Finitura
La lavorazione di finitura rimuove le dimensioni residue per ottenere la forma finale. Le dimensioni dei materiali temprati dopo la prefinitura sono pari a 0,05-0,1 mm, mentre quelle dei materiali morbidi a 0,1-0,3 mm. Le frese a profilo sferico e/o a profilo torico sono gli utensili da scegliere in funzione dei profili finali del pezzo da lavorare.
