Adjustable Coolant Tool Holder for Variable Cutting Conditions
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Solution Overview
Problem
Existing tool holders for rotary cutting tools are inefficient in delivering coolant across a wide range of cutting speeds and tool lengths, as the coolant nozzle is optimized for only specific combinations, leading to suboptimal cooling efficiency.
Innovation Solution
A tool holder with an adjustable mechanism that changes the radial distance and angle of coolant channels, allowing the coolant jet direction to be adapted for different cutting speeds and tool lengths through elastically deflected axial protrusions, and multiple coolant channels for enhanced cooling capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the coolant channel opening is fixed at a specific radial distance from the axis of rotation, then the coolant jet direction is optimized for one specific combination of tool length and cutting speed, but the cooling efficiency deteriorates when using tools with different lengths or cutting speeds
Solution Approach 1:
The coolant channel opening is made dynamically adjustable through an elastic protrusion that can be deflected by an adjusting mechanism. This allows the radial distance of the opening from the axis of rotation to be changed, thereby adapting the coolant jet direction to different tool lengths and cutting speeds. The dynamic adjustment capability directly resolves the contradiction between fixed geometry and variable operating conditions.
Solution Approach 2:
The radial position parameter of the coolant channel opening is made variable through elastic deflection of the protrusion. By changing the radial distance of the opening from the axis of rotation, the system adapts to different cutting parameters (tool length, cutting speed) without requiring multiple tool holders or complex mechanical adjustments.
2Adaptability or versatility
If the axial protrusion length is increased to at least 4 mm (particularly at least 9 mm), then the elastic deflection capability and adjustment range of the coolant jet orientation are improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The protrusion is designed as a flexible elastic element with sufficient axial length (at least 4 mm, particularly at least 9 mm) to enable significant radial deflection. This flexibility allows the coolant channel opening to be positioned at different radial distances from the axis of rotation, providing broad adjustment range for coolant jet orientation while maintaining structural integrity.
3Productivity
If multiple coolant channels are provided, then the cooling capability and coverage of the rotary cutting tool are improved, but the device complexity and number of components increase
Solution Approach 1:
The cooling system is segmented into multiple independent coolant channels, each with its own elastic protrusion and adjustable opening. This segmentation allows different regions of the rotary cutting tool to be cooled simultaneously or independently, enhancing overall cooling capability and coverage while maintaining the ability to adjust each channel separately for optimal performance.
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 adjustable mechanism effectively directs coolant to improve cooling efficiency across various cutting speeds and tool lengths, ensuring efficient coolant delivery and broader coverage of the cutting tool.
Implementation Method 1
the axial protrusion being elastically deflected in the second position relative to the first position by the adjusting mechanism
Implementation Method 2
the coolant is accelerated in a radial direction away from the cutting edge of the rotary cutting tool due to centrifugal effects
Data Source
AI summary
A tool holder for rotary cutting tools is described. The tool holder comprises an axis of rotation, a body having a receptacle for the rotary cutting tool, the receptacle extending coaxially with the axis of rotation, and at least one coolant channel terminating in an opening and adapted to conduct coolant to the rotary cutting tool via the opening. The coolant channel extends through an axial protrusion and the tool holder has an adjusting mechanism which is adjustable between a first position, in which the opening is at a first radial distance from the axis of rotation, and a second position, in which the opening is at a second, different radial distance from the axis of rotation, the axial protrusion being elastically deflected in the second position relative to the first position by the adjusting mechanism.