Cutting Insert With Segmented Main Body For Stability

Solution Overview

Problem

Existing cutting inserts used in machining are prone to insufficient durability when subjected to large loads due to their narrow recessed portion thickness, which can lead to instability during machining.

Innovation Solution

A cutting insert with a flat plate shape featuring a thicker main body portion and thinner cutting portions, where the recessed portions are strategically located in the main body portion to enhance stability and durability, allowing for secure locking in a holder even under high loads.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the recessed portion thickness is kept narrow as in conventional designs, then the cutting insert maintains a compact structure, but the durability and stability become insufficient when large loads are applied

Engineering Contradiction:

ImprovedurabilityVSAvoidstructure

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The cutting insert is divided into a main body portion with a thicker recessed portion and corner portions with thinner recessed portions. This segmentation allows the main body to provide structural strength and durability for stable locking in the holder, while the corner portions maintain compact dimensions for ease of handling and installation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the cutting insert are given different thickness characteristics - the main body portion has a larger recessed portion thickness for strength and stability, while the corner portions have narrower thickness. This local differentiation optimizes both durability and structural compactness in their respective locations.

Inventive Principle:

Principle #3Local quality

2Reliability

If the recessed portion thickness is increased to improve durability, then stability under large loads improves, but the compact structure and ease of handling are compromised

Engineering Contradiction:

ImprovestabilityVSAvoidthickness

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The cutting insert is divided into a main body portion with a thicker recessed portion and corner portions with thinner recessed portions. This segmentation allows the main body to provide structural strength and durability for stable locking in the holder, while the corner portions maintain compact dimensions for ease of handling and installation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the cutting insert are given different thickness characteristics - the main body portion has a larger recessed portion thickness for strength and stability, while the corner portions have narrower thickness. This local differentiation optimizes both durability and structural compactness in their respective locations.

Inventive Principle:

Principle #3Local quality

3Reliability

If the recessed portion thickness is increased to prevent movement under large loads, then locking stability improves, but stress concentration and potential damage risks increase

Engineering Contradiction:

Improvelocking stabilityVSAvoidstress concentration

Core Design Contradiction:

ReliabilityVSStress or pressure

Solution Approach 1:

The cutting insert is divided into a main body portion with a thicker recessed portion and corner portions with thinner recessed portions. This segmentation allows the main body to provide structural strength and durability for stable locking in the holder, while the corner portions maintain compact dimensions for ease of handling and installation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the cutting insert are given different thickness characteristics - the main body portion has a larger recessed portion thickness for strength and stability, while the corner portions have narrower thickness. This local differentiation optimizes both durability and structural compactness in their respective locations.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS10252341B2Cutting insert, cutting tool, and method for manufacturing machined product

Publication Date: 2019.04.09 KYOCERA CORP

AI summary

A cutting insert according to one aspect has a flat plate shape including a first main surface having a polygonal shape, a second main surface located opposite to the first main surface, and an outer peripheral surface located between the first main surface and the second main surface. The cutting insert includes a cutting portion located in regions including at least a corner portion of the first main surface, and a main body portion located in a region other than the corner portion. A thickness of the main body portion is larger than a thickness of the cutting portions, and the main body portion includes a recessed portion or a protruding portion located in the outer peripheral surface thereof.