Cutting Insert Wedge Angles for Centrifugal Force Control
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Solution Overview
Problem
Conventional cutting inserts experience poor fastening properties with cutting tools, leading to shaking and wear during rotation, which shortens their service life due to inadequate control over centrifugal forces.
Innovation Solution
A cutting insert design with an upper main cutting edge and upper sub cutting edge forming angles between 85° and 90°, and corresponding side surfaces with clearance angles, allowing for improved wedge-shaped mounting on the cutting tool, enhancing fastening properties and controlling centrifugal forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the main cutting blade and sub cutting blade are formed perpendicular to each other on the blade surfaces, then the cutting edges can be continuously disposed between corners, but the fastening property with the cutting tool deteriorates due to poor control of centrifugal force
Solution Approach 1:
The patent changes the symmetric perpendicular arrangement (90 degrees) to an asymmetric arrangement where the angle between adjacent cutting edges is 85-95 degrees. This asymmetric angular configuration optimizes the distribution of centrifugal forces during rotation, improving fastening property while maintaining continuous cutting edge coverage between corners.
2Ease of operation
If the blade surfaces are mounted perpendicular to the seat surface, then the cutting edges can be positioned on outer circumferential and bottom surfaces, but shaking and wear occur during rotation due to inadequate centrifugal force control
Solution Approach 1:
The patent modifies the angular parameter of the cutting edge arrangement from 90 degrees to 85-95 degrees. This parameter change optimizes the mechanical distribution of forces during rotation, reducing shaking and wear while maintaining the mounting configuration that positions cutting edges on both outer circumferential and bottom surfaces.
3Shape
If the angle between upper main cutting edge and upper sub cutting edge is 90 degrees or more, then the cutting edges can be continuously disposed, but the centrifugal force cannot be effectively controlled during rotation
Solution Approach 1:
The patent precisely controls the angular parameter between adjacent cutting edges within the range of 85-95 degrees, deviating from the conventional 90 degrees or more. This optimized angular parameter enables effective control of centrifugal forces during rotation while maintaining continuous cutting edge disposition between corners.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The enhanced fastening property minimizes breakage and abrasion, thereby extending the service life of both the cutting insert and tool by effectively managing centrifugal forces during rotation.
Implementation Method 1
it is possible to effectively control the centrifugal force exerted on the cutting insert during rotation of the cutting tool
Implementation Method 2
the first side surface and the second side surface may have a wedge shape centered on the corner, and accordingly, the first and second side surfaces can be mounted in a wedge shape on the first and second seat surfaces
Data Source
AI summary
The technical objective of the present invention is to provide a cutting insert that has an improved fastening property with a cutting tool, thereby preventing reduction of the service life. To this end, the cutting insert according to the present invention has three corners along the circumference thereof; an upper main cutting edge, which is formed on the edge between the upper surface and the first side surface, and an upper sub cutting edge, which is formed on the edge between the upper surface and the second side surface, are continuously disposed between respective corners; the lower surface has the same shape as that of the upper surface; and the angle defined between the upper main cutting edge and the upper sub cutting edge, which are placed on both sides with reference to each corner, is larger than or equal to 85° and is smaller than 90°.