Compound Fillet Radii Cutter for Efficient Milling
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Solution Overview
Problem
Milling/SAM systems face inefficiencies in cutting workpieces with varied feature sizes, requiring significant time and cost due to the need for multiple passes with ball nose cutters, which fail to simultaneously satisfy both aerodynamic and structural considerations.
Innovation Solution
A compound fillet radii cutter with a shaft, frustoconical cutting surface, small radius cutting surface, and large radius cutting surface, where the surfaces are arranged in a tangential union, allowing for variable fillet shaping and efficient milling of diverse feature sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a ball nose cutter is used to mill workpieces with varied feature sizes, then the cutter can produce the smallest feature, but multiple passes are required for larger features, increasing time and cost
Solution Approach 1:
The cutter is segmented into multiple cutting surfaces with different radii (small radius cutting surface, large radius cutting surface, and frustoconical cutting surface) along its length. Each surface is responsible for cutting features of specific size ranges, allowing the cutter to handle varied feature sizes in a single pass without requiring multiple passes with different cutters.
Solution Approach 2:
The compound fillet radii cutter is designed as a universal tool that can perform multiple cutting functions simultaneously. By integrating cutting surfaces of different radii on a single cutter body, it can machine both small and large features, eliminating the need for multiple specialized cutters and reducing the number of passes required.
2Adaptability or versatility
If multiple ball nose cutters are used to handle different feature sizes, then various feature sizes can be produced, but tool selection and changeover time increase
Solution Approach 1:
Multiple cutting surfaces with different radii are merged into a single cutter body. The small radius cutting surface, large radius cutting surface, and frustoconical cutting surface are all integrated on one tool, allowing the workpiece to be machined with a single tool instead of requiring selection and changeover between multiple specialized cutters.
3Device complexity
If a single radius cutter is used, then the cutter structure is simple, but it cannot satisfy both aerodynamic and structural considerations requiring different fillet radii
Solution Approach 1:
The cutter structure is segmented into distinct cutting surfaces along its length, with each surface having a specific radius optimized for different functional requirements. The small radius cutting surface addresses aerodynamic considerations, the large radius cutting surface addresses structural considerations, and the frustoconical cutting surface provides transition capabilities, all within a single integrated tool.
Data Source
AI summary
A compound fillet radii cutter may have a shaft having a cylindrical member, frustoconical cutting surface, a small radius cutting surface having an arc length of a first circle, and a large radius cutting surface having an arc length of a second circle. The frustoconical cutting surface may be disposed between the cylindrical member and the small radius cutting surface. The small radius cutting surface may be disposed between the frustoconical cutting surface and the large radius cutting surface, and a juncture of the large radius cutting surface and the small radius cutting surface may form a tangential union. In this manner, a single cutter may cut radii of various sizes or cut compound radii.