Micro-Channel Cutting Insert for Tool-Chip Cooling and Lubrication
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Solution Overview
Problem
Existing cutting tools struggle to effectively cool and lubricate the tool-chip contact area during finishing operations, leading to limited cooling impact and increased friction forces.
Innovation Solution
A cutting insert with a body featuring a cutting edge, a rake face, and micro channels that form a grid pattern adjacent to the cutting edge, allowing for efficient delivery of coolant and lubrication to the tool-chip contact area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-pressure coolant delivery through tool holder/nozzles is used, then chip control is enhanced, but cooling impact in finishing operations is limited
Solution Approach 1:
The cooling system is segmented into multiple micro channels (at least two) that deliver coolant directly to different zones of the tool-chip contact area, enabling targeted cooling where it is most needed during finishing operations
Solution Approach 2:
A coolant delivery system acts as an intermediary medium, channeling cooling fluid through micro channels to the rake face and tool-chip contact zone, thereby transferring cooling effect precisely to the critical area without relying on high-pressure external nozzles
2Device complexity
If conventional cooling systems are used, then cooling fluid delivery is simplified, but access to the zone of intimate contact between chip and rake surface is prevented
Solution Approach 1:
The cooling system provides localized coolant delivery through micro channels positioned on the rake face, ensuring cooling fluid reaches specifically the tool-chip contact zone where it is most effective, rather than applying cooling broadly
3Temperature
If micro channels are placed close to the cutting edge, then cooling efficiency is improved, but mechanical strength of the cutting edge is reduced
Solution Approach 1:
The micro channels are positioned at an optimal distance from the cutting edge - close enough to provide effective cooling to the contact zone, but far enough to preserve the mechanical strength of the cutting edge, achieving partial cooling action at the most critical location without compromising structural integrity
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 micro channel grid pattern reduces friction and improves cooling, leading to decreased cutting forces, specific energy consumption, and adiabatic shearing effects, while enhancing chip fragmentation and evacuation.
Implementation Method 1
the micro channels define a grid pattern of micro channels that intersect each other in a region of the rake face where contact between a chip and the rake face is assumed to occur during cutting
Implementation Method 2
lubricate the tool-chip contact in order to reduce friction forces between the cutting insert and the chip
Data Source
AI summary
A cutting insert for a cutting tool includes a body having a cutting edge, a rake face, and micro channels provided on the rake face adjacent the cutting edge. The micro channels define a grid pattern of micro channels that intersect each other in a region of the rake face where contact between a chip and the rake face is assumed to occur during cutting with the cutting insert.