Multi-Edge Cutting Insert for Controlled Chip Ejection
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Solution Overview
Problem
Existing cutting inserts do not effectively control the direction of chip ejection during the cutting process, leading to potential tangling and interference with the processed surface.
Innovation Solution
A cutting insert design featuring distinct cutting edges with varying rake angles and orientations, allowing for controlled chip ejection by optimizing the geometry of the cutting edges and rake faces to direct chips away from the processed surface and prevent tangling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cutting edges with uniform rake angles are used, then the cutting insert structure is simple, but chips cannot be effectively directed away from the processed surface causing tangling and interference
Solution Approach 1:
The patent applies local quality by assigning different rake angles to different cutting edges based on their specific functions. The first cutting edge has a first rake angle, the second cutting edge has a second rake angle, and the third cutting edge has a third rake angle, where these angles differ to optimize chip ejection for each specific cutting position and function
Solution Approach 2:
The cutting insert is segmented into multiple cutting edges (first, second, and third cutting edges) with distinct rake angles, allowing each segment to independently control chip ejection in its specific direction, thereby solving the chip tangling problem through functional segmentation
2Productivity
If chips are not properly directed, then the cutting process is simple, but chips tangle and interfere with the processed surface reducing efficiency
Solution Approach 1:
The patent changes the rake angle parameter for different cutting edges to control chip ejection direction. By varying the rake angle parameter across different cutting edges, the system achieves effective chip direction control that prevents tangling and improves cutting efficiency
Data Source
AI summary
A cutting insert of the present disclosure includes a top surface, a bottom surface, a side surface, and a corner cutting edge, a first cutting edge, a second cutting edge and a third cutting edge formed at a ridge line formed by the side surface and the top surface. The corner cutting edge has a first end and a second end. The first cutting edge extends from the first end in a first direction. The second cutting edge extends from the second end in a second direction. The third cutting edge extends from the second cutting edge in a third direction. The top surface has a first rake face adjacent to the first cutting edge, a second rake face adjacent to the second cutting edge, and a third rake face adjacent to the third cutting edge.