3. Process possibilities
The paste extrusion abrasion process is particularly useful for polishing, radiusing and finishing edges in inaccessible internal passages. Surface finishes of 0.05 µm can be achieved, and micro-machining can be carried out successfully on materials as soft as aluminum or as hard as ceramics, carbides and nickel alloys.
3.1 Example: finishing an aluminum extrusion die
The aluminum extrusion die in figure 4 a was treated with abrasive paste extrusion to improve the surface finish from 1.9 µm to 0.18 µm in a cycle time of 5 min. Figure 4 b shows the teeth before and...
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