END MILLS AND CUTTING INSERTS

DE602019070422T2Active Publication Date: 2025-05-21OSG
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Patent Information

Application Number
DE602019070422
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2019-06-03
Publication Date
2025-05-21
Estimated Expiration
2039-06-03

AI Technical Summary

Technical Problem

Conventional ball end mills with linear cutting edges struggle to maintain machining efficiency when cutting both planar and curved surfaces, as they often compromise on surface roughness, making it difficult to improve efficiency for both surfaces simultaneously.

Method used

A ball end mill with a ball end cutting edge featuring large diameter edges formed in an arc shape, covering 80% to 120% of the ball radius, which allows for increased pick feed and improved surface roughness on both planar and curved surfaces, while maintaining a contour shape close to an arc, even when cutting surfaces with different angles.

Benefits of technology

The solution enhances machining efficiency by improving surface roughness and allowing increased pick feed for both planar and curved surfaces, balancing efficiency across different angles and surface types, and reduces the likelihood of chipping and cutting residue.

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Abstract

Large diameter edges 111a to 111e formed in arc shapes having curvature radii larger than a ball radius R1 are provided. This allows improving surface roughness of a machined surface by cutting of a planar surface with the respective large diameter edges 111a to 111e compared with cutting of a planar surface with a ball end cutting edge formed in an arc shape having a single curvature radius. Further, since the respective large diameter edges 111a to 111e are formed in the arc shape, compared with cutting of a curved surface with linear cutting edges, surface roughness of a machined surface can be improved by cutting a curved surface with the respective large diameter edges 111a to 111e. Accordingly, a pick feed during the cutting of the planar surface and the curved surface with the respective large diameter edges 111a to 111e can be increased, and therefore machining efficiency in the cutting of both of the planar surface and the curved surface can be improved.
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