Ridge-Locked Cutting Insert Structure for Breakage-Resistant Mounting
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Solution Overview
Problem
Cutting inserts in cutting tools are prone to breakage due to high cutting forces, despite providing stable mounting in the insert pocket.
Innovation Solution
The cutting insert design includes ridges protruding from the rear sub-surface and grooves on the front and intermediate sub-surfaces, configured to mate with corresponding grooves and ridges in the insert pocket, enhancing stability and reducing the risk of breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a cutting insert is clamped in an insert pocket for stable mounting, then the mounting stability is improved, but the cutting insert risks breaking due to high cutting forces
Solution Approach 1:
The patent adds a vertical dimension to the mounting solution by introducing ridges that protrude upward from the bottom surface of the cutting insert. These ridges engage with corresponding grooves in the insert pocket, creating a three-dimensional interlocking mechanism rather than relying solely on flat surface contact. This dimensional addition simultaneously improves mounting stability and prevents breakage by distributing forces more effectively.
Solution Approach 2:
The ridges protruding from the bottom surface of the cutting insert nest into corresponding grooves in the insert pocket, creating a nested interlocking structure. This nested configuration allows the cutting insert to be securely held within the pocket while the ridges provide additional support points that prevent breaking under high cutting forces, resolving the contradiction between stability and strength.
2Strength
If additional cutting insert material is provided beneath the cutting edge, then the rigidity is improved, but the device complexity increases
Solution Approach 1:
The bottom surface of the cutting insert is segmented into functional zones: a rear sub-surface containing protruding ridges for mounting stability, and front/intermediate sub-surfaces that connect to the cutting edge. This segmentation allows the structure to provide additional material beneath the cutting edge for rigidity while maintaining a relatively simple overall geometry that does not significantly increase manufacturing complexity.
Data Source
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AI summary
The invention is related to a cutting insert (100) comprising a bottom surface (104), wherein the bottom surface (104) comprises a rear sub-surface (116), a front sub-surface (120), and an intermediate sub-surface (122). The rear sub-surface (116) and the front sub-surface (120) are connected to each other via the intermediate sub-surface (122). The cutting insert (100) has a horizontal plane Q. The cutting insert (100) comprises at least one ridge (100) protruding from the rear sub-surface (116) a distance d1 from the rear sub-surface (116) in a direction perpendicular to the rear sub-surface (116). The intermediate sub-surface (122) is connected to the rear sub-surface (116) via a first intersection (124), and the intermediate sub-surface (122) is connected to the front sub-surface (120) via a second intersection (126). The first intersection (124) is arranged at a distance d2 from the horizontal plane Q, and the second intersection (126) is arranged at a distance d3 from the horizontal plane Q, wherein d3 - d2 = d1. The invention also relates to a cutting tool (300) comprising such a cutting insert (100).