Main Spindle Radiating Structure for Machining Tool Holder
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Solution Overview
Problem
Existing cooling structures for main spindles in machining apparatuses require complex mechanisms or equipment, making them difficult to apply to machines with a general structure that grasps tools effectively.
Innovation Solution
A radiating structure featuring a tapered bore at the main spindle's distal end with a detachable tool holder and a key fixing member equipped with a drive key and a radiating member that extends radially to exchange heat with the atmosphere, eliminating the need for complicated equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling structure is provided to cool the shaft and bearing by supplying air for cooling, then the temperature of the main spindle is reduced, but the mechanism or equipment becomes complicated
Solution Approach 1:
The patent combines the cooling function with the existing drive key structure by integrating a radiating member into the key fixing member. This merging eliminates the need for separate cooling mechanisms while achieving effective heat dissipation from the shaft and bearing through the radiating surfaces exposed to ambient air.
Solution Approach 2:
The radiating member utilizes natural convection and radiation to dissipate heat from the main spindle components. By exposing radiating surfaces to the ambient atmosphere, the system achieves passive cooling without requiring external cooling equipment or complex active cooling mechanisms, allowing the structure to cool itself.
2Temperature
If a cooling air passage is provided at the axial center with a blowing section, then cooling is achieved, but the structure becomes difficult to apply to machines with general tool grasping mechanisms
Solution Approach 1:
The patent segments the cooling function from the central axial structure and distributes it to the periphery through the radiating member attached to the drive key structure. This segmentation allows the cooling function to be implemented without interfering with the central tool grasping mechanism, making the solution adaptable to various machine configurations with different tool holding systems.
Solution Approach 2:
Instead of providing cooling along the axial dimension through a central passage, the patent transitions to a radial dimension by attaching a radiating member to the drive key structure. This dimensional change allows heat dissipation to occur through the radial surfaces exposed to ambient air, avoiding conflict with axial tool grasping mechanisms and improving adaptability to general machine structures.
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 allows for effective cooling of the shaft and bearing without complex mechanisms, maintaining machining accuracy by preventing phase shifts and enhancing heat dissipation through ambient atmosphere interaction.
Implementation Method 1
a radiating member which exchanges heat with an ambient atmosphere is provided to the key fixing member provided with the drive key
Implementation Method 2
a radiating member which exchanges heat with an ambient atmosphere is provided to the key fixing member provided with the drive key
Data Source
AI summary
In a radiating structure for a main spindle having a tapered bore formed at a distal end of the main spindle, into which a tapered portion of a tool holder is mounted, a key fixing member provided with a drive key is fixed to the distal end of the main spindle, and the drive key is fit into a key groove formed in the tool holder. This configuration prevents a phase shift in rotation direction of the tool holder arising from rotation of the main spindle. A radiating member which exchanges heat with an ambient atmosphere is provided to the key fixing member provided with the drive key.