Grooving Cutting Tool Coolant Routing at the Cutting Edge
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Solution Overview
Problem
Conventional cutting tools with small diameters face challenges in supplying coolant directly to the cutting edge during grooving, as the coolant flow is often disrupted by chip discharge and the lack of suitable gaps for coolant supply, leading to inadequate coolant delivery and interference with chip discharge.
Innovation Solution
A cutting tool design featuring a first flow path with a second branching flow path and a guide member that directs coolant from the second jetting port to the cutting edge, ensuring reliable coolant supply by setting specific angles and lengths for the flow paths and utilizing the cutting insert as a guide member to maintain coolant flow towards the cutting edge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If coolant is supplied through a conventional coolant flow path in the body, then coolant can be delivered to the cutting edge, but the coolant flow is disrupted by chips and cannot reach the cutting edge effectively
Solution Approach 1:
The coolant flow path is divided into multiple independent channels: a first coolant flow path for general coolant supply and a second coolant flow path specifically for delivering coolant to the cutting edge. This segmentation allows each path to perform its dedicated function without interference from chips, ensuring reliable coolant delivery to the cutting edge while maintaining overall coolant supply.
2Temperature
If coolant is supplied toward the cutting edge, then cooling effect is improved, but chip discharge is impeded by the coolant flow pushing against chips
Solution Approach 1:
The system separates coolant supply function from chip discharge function by providing dedicated coolant flow paths that deliver coolant to the cutting edge without creating opposing flows that would interfere with chip evacuation. The segmented approach allows coolant to cool the cutting edge effectively while chips discharge along their natural path without resistance from coolant pressure.
3Length of moving object
If the cutting tool has a small diameter, then it can perform small-bore machining, but there are no sufficient gaps for coolant supply
Solution Approach 1:
The second coolant flow path is nested within the body structure, utilizing the internal volume of the tool shaft to create a dedicated coolant channel. This nested configuration allows the coolant flow path to be integrated within the small-diameter tool without increasing external dimensions, enabling effective coolant delivery despite the constrained tool size.
4Quantity of substance
If the coolant flow path is sealed, then coolant flow is controlled, but the flow becomes laminar and cannot be directed effectively toward the cutting edge
Solution Approach 1:
The second coolant flow path is configured with specific geometric parameters including a length of not less than 3 times the diameter of the cutting tool and an inclination angle of not less than 30 degrees and not more than 85 degrees relative to the tool axis. These parameter changes transform the coolant flow characteristics, enabling effective delivery to the cutting edge while maintaining flow control.
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
This design effectively supplies coolant to the cutting edge while avoiding interference with chip discharge, ensuring consistent coolant delivery and maintaining chip discharge performance, even in small-diameter grooving operations.
Implementation Method 1
a guide member having a guide surface disposed away from the second jetting port and at least forming a space for the coolant to flow out to the cutting edge from the second jetting port
Data Source
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AI summary
A cutting tool able to sufficiently supply coolant toward a cutting edge of a cutting insert during a cutting process involving grooving a workpiece face includes a first flow path through which coolant is supplied toward a body leading end side, a first jetting port, a second flow path branching at a branch point along the first flow path, a second jetting port, and a guide member having a guide surface distanced from the second jetting port and forming a space for coolant to flow to the cutting edge from the second jetting port. In the first flow path, a substantially straight upstream-of-branch flow path on further toward a base end side than the branch point is at least twice as long as a downstream-of-branch flow path from the first jetting port to the branch point. The second flow path inclines at a 30° to 85° angle to the upstream-of-branch flow path.