Cutting Insert Lateral Structure for Edge Durability and Stable Clamping

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Solution Overview

Problem

Existing cutting inserts suffer from durability issues due to the flat surfaces connecting major and minor cutting edges, which are prone to damage during contact with the workpiece, leading to reduced constraining stability.

Innovation Solution

The cutting insert design features a polygonal shape with concave and convex parts on the lateral surface, ensuring the constraining surfaces are positioned away from the cutting edges, enhancing durability and stability by minimizing contact with the workpiece.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If flat surfaces connect major and minor cutting edges on the lateral surface, then durability of cutting edges is improved, but constraining stability deteriorates due to damage from workpiece contact

Engineering Contradiction:

Improvedurability of cutting edgesVSAvoidconstraining stability

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The lateral surface is divided into multiple segments: inclined surfaces that connect cutting edges (providing durability) and flat constraining surfaces positioned away from cutting edges (providing stability). This segmentation allows each surface to perform its specific function without interfering with the other, resolving the contradiction between edge durability and constraining stability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The constraining surfaces are extracted and positioned separately from the inclined surfaces that connect cutting edges. By taking out the constraining function and locating it on distinct flat surfaces away from the cutting edge connection zones, the design prevents workpiece contact damage to constraining surfaces while maintaining the durability benefits of the inclined surfaces.

Inventive Principle:

Principle #2Taking out (Extraction)

2Ease of manufacture

If constraining surfaces are positioned on lateral surfaces connecting cutting edges, then ease of manufacture is improved, but durability of constraining surfaces deteriorates due to contact with workpiece

Engineering Contradiction:

Improveease of manufactureVSAvoiddurability of constraining surfaces

Core Design Contradiction:

Ease of manufactureVSDuration of action of stationary object

Solution Approach 1:

The constraining surfaces are positioned in a different spatial dimension relative to the cutting edges - specifically, they are located on lateral surfaces that are offset from the inclined surfaces connecting the cutting edges. This dimensional separation ensures that constraining surfaces do not come into contact with the workpiece during cutting operations, thereby maintaining their durability while still allowing for relatively simple manufacturing processes.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS12370610B2Cutting insert, cutting tool, and method for manufacturing machined product

Publication Date: 2025.07.29 KYOCERA CORP

AI summary

A cutting insert has an upper surface, a lower surface and a lateral surface. The upper surface has a first upper side, and a second upper side. The lower surface has a first lower side and a second lower side. The lateral surface has a first lateral surface, a second lateral surface, and a third lateral surface. The first lateral surface has a first concave part having a first constraining surface having a flat shape. The second lateral surface has a second concave part having a second constraining surface having a flat shape. The third lateral surface has a convex part. The first concave part and the second concave part are separated from each other by the convex part.