Double-Sided Cutting Insert Support Structure Against Chatter
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Solution Overview
Problem
Conventional double-sided cutting inserts are prone to chattering or chipping due to inadequate support when subjected to large cutting forces, as they are only supported at the center around the mounting hole, leading to potential deformation or wear of unused cutting edges.
Innovation Solution
The cutting insert features two opposite end surfaces with a peripheral side surface and multiple cutting edge sections, including corner, major, and minor cutting edges, with a non-cutting intersecting ridgeline area extending between adjacent cutting edge sections, providing additional support through the peripheral side surface and a seating surface that extends between these sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the seating surface is spaced apart from the edge portion to prevent contact with unused cutting edges, then the unused cutting edges are protected from deformation or wear, but the cutting insert is only supported at the center portion leading to inadequate support under large cutting forces
Solution Approach 1:
The invention extends support from a single central point (0D/1D) to a distributed network across the seating surface (2D). By forming multiple seating surfaces that extend toward the peripheral side surface, the support distribution transitions from concentrated to distributed, enabling both edge protection and adequate force bearing through increased spatial coverage.
Solution Approach 2:
The seating surface is divided into multiple discrete seating surfaces (first, second, third, fourth seating surfaces) rather than forming a single continuous support area. This segmentation allows each seating surface to independently support specific regions while collectively providing comprehensive support, resolving the contradiction between localized protection and global strength.
2Device complexity
If the cutting insert is supported only at the center around the mounting hole, then the structure is simple, but chattering or chipping occurs under large cutting forces
Solution Approach 1:
The support structure evolves from a single central support point to a two-dimensional distributed network of multiple seating surfaces. This dimensional expansion maintains relative structural simplicity while dramatically improving stability by distributing loads across multiple contact points with the tool body.
Solution Approach 2:
Different seating surfaces are positioned to provide localized support at specific regions of the cutting insert. The first and second seating surfaces support one end while the third and fourth seating surfaces support the other end, creating locally optimized support zones that collectively enhance overall stability without requiring complex global restructuring.
Data Source
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Figure 2B
AI summary
The present invention relates to a cutting insert including: two opposite end surfaces (2, 3) ; a peripheral side surface (4) extending between the end surfaces; and plural cutting edge sections (2A, 2B, 3A, 3B) that are formed along an intersecting ridgeline portion between the peripheral side surface and each of the end surfaces. Each of the cutting edge sections includes a corner cutting edge (6), a major cutting edge (7), and a minor cutting edge (8). A non-cutting intersecting ridgeline area (2C, 2D, 3C, 3D) extending between adjacent cutting edge sections on one end surface is located adjacent, via the peripheral side surface, to at least a part of the corner cutting edge and the major cutting edge of an associating cutting edge section on the other end surface.