Cutting Tool Holder Coolant Layout for Swarf Crushing and Rigidity
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Solution Overview
Problem
Conventional cutting tool holders supply coolant from the flank face side to the cutting edge, which is inefficient for swarf crushing and can lead to holder deformation due to lack of rigidity during cutting.
Innovation Solution
A cutting tool holder design that supplies coolant from the rake face side of the cutting insert using a holder body with a coolant reservoir and flow paths within the pressing member, ensuring the coolant is ejected with increased pressure and effectively reaches the cutting edge, while maintaining the holder's rigidity through strategic placement of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If coolant is supplied from the flank face side to the cutting edge, then the holder structure can be simplified, but the swarf crushing effect is reduced and cooling efficiency is poor
Solution Approach 1:
The coolant supply system is segmented into multiple independent flow paths: a first coolant supply path through the holder body and a second coolant supply path through the pressing member. This segmentation allows coolant to be delivered from different directions (flank face and rake face) to work cooperatively, achieving both structural simplicity and effective swarf crushing
Solution Approach 2:
The pressing member is nested within the holder body structure, with the coolant reservoir positioned in the base end portion of the pressing member. The pressing member's coolant supply function is integrated into the overall holder system, allowing efficient space utilization while maintaining independent coolant ejection capability from the rake face side
2Temperature
If a coolant reservoir is added to increase coolant pressure, then the cooling effect is improved, but the device complexity increases
Solution Approach 1:
The coolant reservoir is merged with the pressing member structure, combining the functions of the pressing member (fixing the cutting insert) and the coolant storage/delivery system. This integration achieves effective coolant pressure buildup for improved cooling without significantly increasing overall device complexity
Solution Approach 2:
The coolant reservoir is strategically positioned in the base end portion of the pressing member, creating a localized pressure buildup zone. This local quality enhancement allows coolant to be ejected with increased pressure from the front end portion, improving cooling effect at the cutting edge without requiring a complete system redesign
3Ease of operation
If the pressing member structure is modified to include coolant flow paths, then coolant ejection from the rake face side is enabled, but the manufacturing complexity increases
Solution Approach 1:
The pressing member is designed with multi-functionality: it not only fixes the cutting insert to the holder body but also serves as a coolant storage and delivery system through its integrated reservoir and flow paths. This universal design enables coolant ejection from the rake face side while utilizing the existing pressing member structure, reducing the need for separate components
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 coolant is efficiently supplied to the cutting edge from the rake face side, enhancing cooling and swarf crushing effects while maintaining the holder's rigidity, thus improving processing precision and reducing deformation.
Implementation Method 1
the coolant reservoir has a cross sectional area larger than a cross sectional area of each of the first flow path and the second flow path
Data Source
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Figure 3
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AI summary
A cutting tool holder according to one embodiment supports a cutting insert including a rake face, a flank face, and a cutting edge. The cutting tool holder according to one embodiment includes: a holder body having a seat face on which the cutting insert is placed; a pressing member that positions and fixes the cutting insert to the holder body; and a fixing member that fixes the pressing member to the holder body. The pressing member has: a front end portion close to the cutting edge; and a base end portion distant away from the cutting edge. The front end portion is provided with a first coolant ejection hole. A first flow path is provided inside the holder body. A coolant reservoir and a second flow path are provided inside the pressing member. The coolant reservoir is disposed at the base end portion side relative to a position at which the pressing member is fixed to the holder body, in a direction from the front end portion toward the base end portion.