Tool Holder Coolant Outlet Geometry for Narrow Groove Turning
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Solution Overview
Problem
Existing tool holders with narrow designs face challenges in supplying sufficient coolant to machining points during narrow groove turning due to small coolant channels, leading to limited coolant quantity and precise alignment issues with fine coolant jets.
Innovation Solution
A tool holder design featuring an elongated coolant channel and outlet opening, with a width smaller than height, allowing for increased coolant flow and a fanned-out coolant jet that can effectively reach machining points, even in narrow grooves, while avoiding turbulence through continuous cross-section transitions and additive manufacturing for complex shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the tool holder is designed with a narrow configuration to enable narrow grooving widths, then the cutting insert receptacle can accommodate narrow machining applications, but the coolant channels must be made very small which limits the amount of coolant supply per unit of time
Solution Approach 1:
The coolant outlet opening transitions from a conventional circular cross-section to an elongated oval cross-section, changing the dimensional characteristics of the coolant flow path. This allows the outlet to fit within the narrow tool holder width while providing a larger effective flow area through the elongated shape, thereby increasing coolant supply quantity without increasing the overall tool holder width.
Solution Approach 2:
The coolant channel cross-section is varied along its length, with the outlet portion being elongated while other portions may maintain different cross-sectional characteristics. This local modification of the coolant channel geometry optimizes coolant flow at the critical outlet region without requiring changes to the entire tool holder structure.
2Area of moving object
If the coolant outlet is made very small to fit the narrow tool holder, then the tool holder maintains its narrow design for narrow grooving, but the coolant jet becomes very fine which makes precise alignment difficult
Solution Approach 1:
By changing the coolant outlet from a small circular opening to an elongated oval opening, the effective target area for alignment is increased. The elongated shape provides a larger apparent size in one dimension, making it easier to align precisely with the machining point while still fitting within the narrow tool holder constraints.
3Quantity of substance
If the coolant outlet is enlarged to increase coolant quantity, then more coolant can be supplied to the machining point, but the tool holder width must be increased which is not suitable for narrow grooving widths
Solution Approach 1:
The coolant outlet opening adopts an elongated oval cross-section that increases the effective flow area and coolant supply quantity without increasing the overall tool holder width. The elongated shape allows more coolant to pass through by utilizing the extended dimension while maintaining compatibility with narrow grooving applications.
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 ensures improved coolant supply and lubrication to machining points, enhancing machining efficiency and precision during narrow groove turning by increasing coolant quantity and directing it effectively, while minimizing turbulence and production costs.
Implementation Method 1
an internal coolant channel extending inside the tool holder between a coolant inlet opening and a coolant outlet opening
Implementation Method 2
In order to guarantee the best possible cooling and lubrication of the cutting insert in contact with the workpiece, the coolant should reach the machining point as precisely as possible within the groove to be produced
Data Source
AI summary
A tool holder for a tool for machining a workpiece. The tool holder has a cutting insert receptacle for receiving a cutting insert, wherein the cutting insert receptacle has an upper clamping jaw for abutting an upper surface of the cutting insert and a lower clamping jaw for abutting a lower surface of the cutting insert opposite the upper surface. Further, the tool holder has an internal coolant channel extending inside the tool holder between a coolant inlet opening and a coolant outlet opening, wherein an end portion of the coolant channel extending inside the upper clamping jaw along a channel center axis opens into the coolant outlet opening. The coolant outlet opening is arranged at the upper clamping jaw and configured as an elongated opening. A width of the coolant outlet opening is smaller than a height of the coolant outlet opening measured orthogonally to the width of the coolant outlet opening. The end portion of the coolant channel is also elongated in a cross-section orthogonal to the channel center axis. A width of the end portion measured orthogonal to the channel center axis is smaller than a height of the end portion measured orthogonal to the channel center axis and orthogonal to the width of the end portion.