Bearbeitung von geschlossenen Taschen
Die Herstellung geschlossener Taschen erfolgt meist durch Schruppen in Z-Ebenen. Häufig wird hierbei beim Fräsen der Bearbeitungseintritt über eine Rampe gewählt. Die Wahl des Werkzeuges hängt von der Tiefe der Wände und der zu erzeugenden Ausformschräge am Bauteil ab. Das breite Portfolio von MAPAL mit modularen Systemen deckt auch die Bearbeitung tiefer Taschen mit großen Durchmessern ab.
Werkzeugübersicht für folgende Bearbeitungsschritte:
Desbastado
El desbastado abarca prácticamente toda la tarea de mecanizado. Optar por estrategias de fresado especiales como el mecanizado de gran avance o el fresado trocoidal puede reducir el tiempo de mecanizado y, por tanto, aumentar la rentabilidad. Aparte de las herramientas con insertos de corte y fresas de metal duro, se emplearán fresas de alto rendimiento con formas de desbastado especiales.
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.
Acabamento
A operação de acabamento remove a permissão restante para alcançar a forma final. Após o semi-acabamento, isto é 0,05-0,1 mm para materiais endurecidos e 0,1-0,3 mm para materiais macios. As fresas esféricas e/ou com raio de canto são a ferramenta de escolha, dependendo dos contornos finais da peça a ser trabalhada.
Acabamento de material residual
As propriedades cada vez mais complexas das formas a serem produzidas requerem, após a usinagem de acabamento uma fresagem do material residual, principalmente nos cantos. As fresas esféricas de metal duro integral são normalmente utilizadas para este fim.
