Single-Sided Cutting Insert Clamping for High-Speed Milling
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Solution Overview
Problem
Existing indexable cutting inserts for high-speed milling operations are heavy and inefficient to manufacture, lacking optimal design features for weight reduction and efficient clamping mechanisms.
Innovation Solution
A single-sided indexable cutting insert with differing upper and lower surfaces, featuring clamping bores, annular recesses, and recess channels that reduce weight and improve manufacturing efficiency, along with a cutting tool design that includes a rotatable insert receiving pocket with threaded bores and a knob for secure clamping under radial forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional indexable cutting inserts are used for high-speed milling, then cutting functionality is provided, but weight is excessive and manufacturing efficiency is low
Solution Approach 1:
The cutting insert is segmented into functional zones with recesses and channels that remove unnecessary material. The lower surface contains recesses at strategic locations that divide the structure into functional segments, reducing overall weight while maintaining structural integrity for high-speed milling operations
Solution Approach 2:
The cutting insert incorporates recesses and channels that create a porous-like structure by removing material from non-critical areas. This reduces weight without compromising the strength needed for cutting edges and clamping mechanisms, achieving weight reduction while maintaining manufacturing efficiency
2Reliability
If traditional clamping mechanisms are used, then cutting inserts can be retained, but centrifugal forces at high speed cause instability
Solution Approach 1:
The clamping mechanism uses asymmetric positioning of clamping bores and recesses on the cutting insert. The lower surface features recesses at specific asymmetric locations that optimize the distribution of clamping forces, improving stability against centrifugal forces generated during high-speed rotation
Solution Approach 2:
The cutting insert design adds dimensional complexity with multiple recesses and channels on the lower surface. These features create additional contact points and force distribution paths in multiple dimensions, enhancing the clamping mechanism's ability to resist centrifugal forces during high-speed milling
Data Source
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AI summary
A cutting tool (58) rotatable about a tool axis (AT), having a cutting body (60) and at least one indexable, single-sided cutting insert (20) removably secured in an insert receiving pocket (62) of the cutting body (60). The cutting insert (20) has opposing upper and lower surfaces (22, 24) with a peripheral side surface (26) extending therebetween and a central axis (AC) passing therethrough. First and second clamping bores (28a, 28b) extend between and open out at the upper and lower surfaces (22, 24). First and second primary cutting edges (30a, 30b) are formed at the intersection of the upper surface (22) and the peripheral side surface (26). The lower surface (24) includes first and second annular recesses (36a, 36b) communicating with the first and second clamping bores (28a, 28b), respectively, and first and second recess channels (44a, 44b) extending from the first and second clamping bores (28a, 28b), respectively, to the peripheral side surface (26). The first and second recess channels (44a, 44b) extend parallel to a longitudinal first plane (P1) containing the central axis (AT).