Cutting Insert Recess Geometry for Coolant-Guided Chip Control
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Solution Overview
Problem
Conventional cutting inserts face issues with insufficient coolant supply to the cutting edge, leading to poor chip control and reduced durability, especially during low cutting depth operations.
Innovation Solution
A cutting tool design featuring a breaker wall with recessed parts on the boss surface that direct coolant flow towards the cutting edge, ensuring stable chip control and efficient coolant delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a narrow breaker width is used to control chips at low cutting depth, then chip control is improved, but coolant supply to the cutting edge becomes insufficient
Solution Approach 1:
The boss surface is segmented into multiple recessed parts (first, second, third recessed parts) that divide and direct coolant flow along different paths toward the cutting edge, ensuring sufficient coolant supply even when the breaker width is narrow for effective chip control
Solution Approach 2:
The recessed parts act as intermediary channels that guide coolant from the boss surface to the cutting edge, mediating between the narrow breaker width and the need for adequate coolant delivery to the cutting point
2Temperature
If coolant is supplied from the outside to the cutting edge, then cooling is improved, but coolant spreads around on the boss surface and insufficient coolant reaches the cutting edge
Solution Approach 1:
The recessed parts are strategically positioned and shaped to locally direct coolant flow toward specific areas of the cutting edge, ensuring that coolant is delivered precisely where needed rather than spreading uselessly across the boss surface
Solution Approach 2:
The recessed parts create three-dimensional flow paths that channel coolant along the boss surface and into the cutting edge region, transforming the two-dimensional spreading of coolant into directed three-dimensional flow toward the cutting point
3Productivity
If chips are generated between the boss surface and the cutting edge, then cutting operation continues, but chips disturb coolant flow and prevent coolant from reaching the cutting point
Solution Approach 1:
The multiple recessed parts create separate coolant flow paths that can navigate around chips generated during cutting, ensuring that coolant continues to reach the cutting point even when chips are present in the cutting zone
Solution Approach 2:
The recessed parts are pre-configured to channel coolant along paths that anticipate and bypass the generation of chips, delivering coolant to the cutting point before chips can block the direct flow path
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
Enhances coolant supply to the cutting edge, improving chip control and tool durability, even at low cutting depths, by allowing coolant to flow through recessed parts and around the breaker wall.
Implementation Method 1
coolant, which would otherwise be spread and distributed due to the existence of the boss surface, is allowed to flow through the recessed parts and then be delivered toward the cutting edge
Data Source
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AI summary
A cutting tool includes: a cutting edge configured on an intersecting line of a rake surface and a flank; a breaker wall formed inside the cutting edge and protruding above the cutting tool; a boss part including a boss surface formed above the breaker wall; and a plurality of recessed parts formed in the boss part so as to extend toward the cutting edge. The width of the breaker wall in a direction in which the cutting edge extends along an intersecting line (including a virtual intersecting line or a virtual extension of the intersecting line) of the boss surface and the breaker wall, is greater than the width of a groove formed by the recessed part along the same intersecting line.