Movable Coolant Pipe Toolholder for High-Speed Milling
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Solution Overview
Problem
Existing milling tool systems face challenges in efficiently delivering coolant to the interface between the tool and the workpiece, particularly due to limitations in coolant delivery accuracy and adjustability, especially when the toolholder's revolutions per minute (rpm) increase.
Innovation Solution
The development of a toolholder with a movable coolant pipe that can adjust its position between a resting and a deflected position, allowing for variable coolant delivery angles and improved coolant distribution as the toolholder's rpm increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If coolant is delivered through a fixed pipe in the toolholder, then coolant delivery is simple and reliable, but the coolant delivery angle cannot be adjusted when rpm increases
Solution Approach 1:
The coolant pipe is designed as a flexible hose rather than a rigid structure, allowing it to dynamically change its orientation and delivery angle in response to centrifugal forces generated during toolholder rotation. This enables the coolant delivery angle to adapt automatically as rpm increases, resolving the contradiction between adaptability and structural simplicity.
2Measurement precision
If flooding systems are used to cool the tool-workpiece interface, then cooling coverage is extensive, but coolant consumption is high and delivery accuracy is poor
Solution Approach 1:
The flexible coolant pipe is positioned to deliver coolant locally and precisely to the tool-workpiece interface through its ability to orient toward the cutting zone under centrifugal force. This localized delivery approach significantly reduces coolant consumption compared to flooding systems while maintaining effective cooling at the critical interface area.
3Adaptability or versatility
If jetting systems deliver coolant accurately to the interface, then coolant usage is efficient, but the delivery angle cannot be adjusted during operation
Solution Approach 1:
The flexible coolant pipe automatically adjusts its delivery angle through the centrifugal forces generated during toolholder rotation, eliminating the need for external control mechanisms or manual adjustment. The system self-regulates the coolant delivery angle based on operating conditions, maintaining operational simplicity while achieving adaptability.
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 solution enhances coolant delivery efficiency by allowing for adjustable coolant pipe positions, which improves heat management at the tool-workpiece interface, even at higher rpm conditions.
Implementation Method 1
the coolant pipe is movable between a resting position and a deflected position... when there is an increase in a toolholder's revolutions per minute (rpm)
Data Source
AI summary
Toolholders that have a movable coolant pipe are described. An example toolholder has a tool body and a coolant pipe. The tool body is rotatable around a central axis and has a coolant channel, a tool body passageway, and a chamber. The chamber extends from the tool body passageway toward the coolant channel. The coolant pipe is disposed within the chamber and has a coolant pipe first end, a coolant pipe second end, and a coolant pipe portion. The coolant pipe portion extends from the coolant pipe second end toward the coolant pipe first end. The coolant pipe is movable between a resting position and a deflected position. In the resting position, the coolant pipe portion is disposed a first distance from the central axis. In the deflected position, the coolant pipe portion is disposed a second distance from the central axis that is different than the first distance.