Cutting Insert Breaker Wall Grooves 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 finishing processes with low cutting depth.
Innovation Solution
A cutting tool design featuring a breaker wall with recessed parts on the boss surface that directs 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 during low cutting depth machining, 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, and third recessed parts) that divide and direct coolant flow along different paths toward the cutting edge, ensuring adequate 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 constraint and the requirement for sufficient 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 boss surface has different local structures: flat regions for general coolant distribution and recessed parts (grooves/channels) that locally concentrate and direct coolant flow toward the cutting edge, ensuring both overall cooling and targeted coolant delivery to where heat is generated most
3Productivity
If chips are generated between the boss surface and cutting edge during cutting, then cutting function is maintained, but chips disturb coolant flow and prevent sufficient coolant from reaching the cutting point
Solution Approach 1:
The recessed parts are pre-formed in the boss surface to create dedicated coolant flow paths before cutting occurs, establishing protected channels that will guide coolant to the cutting edge even when chips are generated during the cutting process
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 design enhances coolant supply to the cutting edge, improving chip control and tool durability, even under low cutting depth conditions.
Implementation Method 1
a plurality of recessed parts formed in the boss part so as to extend toward the cutting edge... 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
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.