Cutting Insert Lateral Surface Structure for Downsized Durability
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Solution Overview
Problem
The downsizing of cutting inserts leads to a reduction in thickness between the through hole and the lateral surface, resulting in decreased durability.
Innovation Solution
The cutting insert features a polygonal upper and lower surface with a cutting edge on the short side, a through hole centered on both surfaces, and a lateral surface with specific planes and inclined surfaces that ensure thickness and strength, even when downsized.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the cutting insert is downsized, then the size of the cutting insert is reduced, but the thickness between the through hole and the lateral surface decreases leading to reduced durability
Solution Approach 1:
The patent introduces a multi-level lateral surface structure with different height levels (first lateral surface at first height level, second lateral surface at second height level). This dimensional variation in the lateral surface creates distinct regions that maintain adequate thickness between the through hole and the lateral surfaces, even in downsized inserts. The first inclined surface connecting these levels further optimizes stress distribution.
Solution Approach 2:
The lateral surface is segmented into multiple distinct surfaces (first lateral surface, second lateral surface) at different height levels, with each serving specific functional purposes. This segmentation allows the through hole to be positioned optimally relative to each lateral surface segment, maintaining sufficient material thickness for durability while enabling compact overall dimensions.
2Volume of moving object
If the cutting insert is downsized, then the size of the cutting insert is reduced, but the strength between the through hole and the lateral surface decreases leading to increased fracture likelihood
Solution Approach 1:
By creating lateral surfaces at different height levels, the patent establishes multiple load-bearing paths and stress distribution zones. The first inclined surface connecting different height levels acts as a stress transition zone, preventing stress concentration that would lead to fracture in uniformly sized downsized inserts.
Solution Approach 2:
Different regions of the lateral surface are given different heights and functions. The first lateral surface and second lateral surface at different height levels provide locally optimized strength characteristics, ensuring adequate material thickness and structural integrity in critical areas while maintaining overall compact size.
Data Source
AI summary
A cutting insert has an upper surface having a long side, a short side, a lower surface, a lateral surface and a through hole. The lateral surface has a first lateral surface. The first lateral surface has a first plane that is overlapped with a central axis of the through hole in a front view and is parallel to the central axis, a second plane that is located closer to the short side than the first plane and is parallel to the central axis, a third plane that is located more away from the short side than the first plane and is parallel to the central axis, and a first inclined surface that is located between the second plane and the upper surface and comes closer to the central axis as coming closer to the long side. The first inclined surface is located away from the first plane.