Cutting Insert Geometry for Stable Fixation and Reduced Interference
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Solution Overview
Problem
Existing cutting inserts with wide flat surfaces interfere with workpieces, particularly at corners where the main cutting edge intersects with the sub cutting edge, leading to instability and potential damage during the milling process.
Innovation Solution
A cutting insert design featuring a polygonal first surface, a second surface, and lateral surfaces with specific geometric configurations, including inclined and curved regions, which reduces interference with the workpiece while allowing stable fixation to a holder, enhancing the insert's durability and finish quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the flat surfaces on the lateral surfaces are made wide to ensure stable fixation to the holder, then the fixation stability is improved, but the interference with the workpiece increases
Solution Approach 1:
The lateral surface is divided into different regions with different functions: a first region (flat surface) for stable fixation to the holder, and a second region (curved surface) for reduced interference with the workpiece. This local differentiation allows each part to optimize its specific function without compromising the other.
Solution Approach 2:
The lateral surface is segmented into multiple regions including a first region with a flat surface for fixation and a second region with a curved surface for cutting. This segmentation allows the insert to simultaneously achieve stable fixation and reduced workpiece interference through distinct functional zones.
2Stability of the object's composition
If the flat surfaces are made wide to improve fixation stability, then the fixation stability is improved, but the wear at the corner portion increases
Solution Approach 1:
The corner portion of the lateral surface is designed with a curved surface configuration that provides both fixation stability and reduced wear. The curved geometry at the corner area specifically addresses wear resistance while maintaining the necessary stability for fixation.
Solution Approach 2:
The lateral surface includes a curved surface portion at the corner region, which reduces stress concentration and wear compared to sharp corners. This curvature helps distribute mechanical loads more evenly, improving wear resistance while maintaining fixation stability.
3Stability of the object's composition
If the flat surfaces are made wide to ensure stable fixation, then the fixation stability is improved, but the machining precision and surface finish deteriorate due to workpiece interference
Solution Approach 1:
Different regions of the lateral surface are assigned different geometries: flat surfaces for fixation stability and curved surfaces for precision machining. This local quality differentiation ensures that the flat surfaces provide stable fixation while the curved surfaces prevent interference that would compromise machining precision and surface finish.
Solution Approach 2:
The lateral surface is segmented into fixation regions with flat surfaces and cutting regions with curved surfaces. This segmentation allows the insert to simultaneously achieve stable fixation and high machining precision by preventing workpiece interference in the critical cutting zones.
Data Source
AI summary
A cutting insert may include a first surface, a second surface and a lateral surface. The first surface may have a polygonal shape and may include a first corner, a second corner, a third corner, a first side and a second side. The lateral surface may include a first lateral surface and a second lateral surface. At least a part of the first lateral surface may be located between the first side and the second surface. At least a part of the second lateral surface may be located between the second side and the second surface. The first lateral surface may be located further outside than the first side in a front view of the first surface. The first lateral surface may include a first region located closer to the second lateral surface as coming closer to the second surface.