Cutting Insert Perpendicular Relief Faces Stiffness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional multi-function cutting tools with slanted relief faces have low strength and reduced stability when mounted to a cutter body, leading to shorter tool life during high feed, high speed, and high depth cutting operations.
Innovation Solution
A multi-function cutting tool design with a cutting insert featuring perpendicular relief faces to the lower surface, including a major cutting edge with a downwardly inclined angle and convex curvature, and additional cutting edge features that enhance stability and secure fastening to the cutter body, allowing for increased stiffness and secure mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cutting insert has slanted relief faces, then the ease of manufacture is improved, but the strength and stiffness of the cutting insert are reduced
Solution Approach 1:
The patent inverts the conventional slanted relief face design by making the relief faces perpendicular to the lower surface of the cutting insert. This inversion changes the geometric configuration from inclined surfaces to vertical surfaces, thereby increasing the stiffness and strength of the cutting insert while maintaining manufacturability through standard perpendicular machining operations.
2Ease of manufacture
If a cutting insert has slanted relief faces, then the ease of manufacture is improved, but the stability when mounted to the cutter body is reduced
Solution Approach 1:
The patent inverts the conventional slanted relief face design by making the relief faces perpendicular to the lower surface of the cutting insert. This inversion changes the geometric configuration from inclined surfaces to vertical surfaces, thereby increasing the stiffness and strength of the cutting insert while maintaining manufacturability through standard perpendicular machining operations.
3Productivity
If the cutting depth is increased to achieve high depth cutting, then the productivity is improved, but the resistance applied to the cutting insert is increased
Solution Approach 1:
The patent segments the cutting insert into multiple functional zones with different edge types (major cutting edge parts with downward inclination for primary cutting, minor cutting edge parts for secondary functions). This segmentation allows the insert to handle high depth cutting operations by distributing the cutting load across different edge segments, thereby maintaining productivity while managing resistance forces.
Solution Approach 2:
The patent applies local quality by providing different geometric characteristics to different parts of the cutting insert. The major cutting edge parts have downward inclination angles of 3° to 10° for effective cutting, while the relief faces are perpendicular for stability. This localized optimization allows the insert to withstand high resistance forces during high depth cutting while maintaining cutting efficiency.
Data Source
AI summary
A multi-function cutting tool is disclosed. The multi-function cutting tool includes a cutting insert (200) and a cutter body (300). The cutting insert has an upper surface (201), a lower surface (205), and first and second cutting edge corner parts (210) and (220), which are provided on the upper surface such that the upper surface has a symmetrical structure with respect to a diagonal direction. The cutting insert further has a major cutting edge part (230), a first minor cutting edge part (240), and a lowered cutting edge part (250). The major cutting edge part has a downwardly inclined angle ranging from 3° to 10°, and extends from the first cutting edge corner part towards the corresponding second cutting edge corner part. When seen in the front view of the cutting insert, the major cutting edge is defined by a convex curved line, which has a curvature radius of 1000 mm or more.