Machining even surfaces
Operations to create even surfaces occur very frequently and in different areas in the die & mould sector: It could be component-related, strategy-related due to the respective milling process or due to requirements for mould closing surfaces as well as sections and cutting dies. The right tool is then selected depending on the application and requirements.
Tool overview for the following machining steps:
Roughing
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.
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。
