粗旋削
加工量の大半を占めるのが粗旋削加工です。高送り加工やトロコイドミリング加工などの特殊な加工方法により、加工時間を短縮し、経済性を高めることができます。交換可能な切削インサート付きツールや超硬ソリッドエンドミルに加え、特殊な粗削り形状を持つ高性能ミリングカッターも使用されます。
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.
Finishing
The finishing process removes the remaining material in order to achieve the final shape. After pre-finishing, stock removal is 0.05-0.1 mm for hardened materials or 0.1-0.3 mm for soft materials. Ball and/or corner radius milling cutters are the tools of choice, regardless of the final contours of the workpiece.
Residual material finishing
The increasingly complex properties of the shapes to be produced require milling of the residual material after finishing, mainly in the corners. Solid carbide ball cutters are usually used for this.
