Machining 3D surfaces
In the die & mould sector, the manufacture of increasingly complex forms is part of everyday life. Continuous further developments in machine tools and CAM software raise performance and productivity to an ever higher level. The tools used must therefore always be state-of-the-art. To achieve optimum results, each design starts with a process analysis.
Tool overview for the following machining steps:
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.
仕上げ
仕上げでは、残った取り代を取り除き、最終的な形状に仕上げます。中仕上げ後の寸法は、高硬度材で0.05～0.1mm、軟質材で0.1～0.3mmです。最終的な被削材質の輪郭に応じて、球面シートカッターおよびコーナーRミリングカッターを選択します。
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.