Turning Insert Interface With Deep Central Flanks Against Chipping
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Solution Overview
Problem
Existing turning tools experience breakage at the longitudinal sides of the cutting insert during operation.
Innovation Solution
A turning insert design featuring alternating ridges and grooves with a central main pair of flanks having greater depth than other flanks, providing enhanced strength and stability, and a symmetrical interface for secure mounting in a tool body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If uniform depth flanks are used in the insert interface, then manufacturing is simplified, but the insert is prone to breaking at lateral sides due to insufficient force distribution
Solution Approach 1:
The patent applies local quality by varying the depth of different flanks in the insert interface. The central main pair of flanks has a greater depth than the other flanks, creating a non-uniform structure. This local variation in flank depth allows the central flanks to bear a larger proportion of the forces exerted on the insert, thereby preventing breaking at the lateral sides while maintaining manufacturing feasibility.
2Force
If deeper flanks are used throughout the interface, then force bearing capacity increases, but the risk of chipping at lateral sides increases
Solution Approach 1:
The patent resolves this contradiction by applying local quality through differential flank depths. The central main pair of flanks is made deeper to increase force bearing capacity where the insert is strongest and can best utilize the depth. The lateral flanks are kept shallower to reduce the risk of chipping at the vulnerable lateral sides. This localized differentiation allows the interface to simultaneously achieve high force bearing capacity and resistance to chipping.
Data Source
AI summary
A turning insert, a turning tool body and a turning tool for cutting metal workpieces, by grooving or parting, is provided. The turning insert includes at least one cutting head and a support body extending rearward from the cutting head. The support body includes a top surface and a bottom surface, which each extend longitudinally rearward form the cutting head, wherein both have one insert interface each. Each insert interface includes a set of flanks forming alternating parallel, straight and rearward extending ridges and grooves. Each flank of each set of flanks extends from an outer peak of an associated ridge to an inner bottom of an associated groove, and a central main pair of flanks, the depth of the central main pair of flanks is larger than the depth of all other flanks of the same insert interface.