Shrink Fit Chuck Thermal Coating Warping Prevention
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Solution Overview
Problem
Shrink-fit chucks experience warping due to heating and cooling processes, which can impair concentricity and lead to reduced performance during tool insertion or removal.
Innovation Solution
A shrink-fit chuck with thermally conductive coatings on its sections to distribute heat evenly, preventing warping and maintaining concentricity, and featuring a hollow shank taper for automatic tool changing and corrosion protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the shrink chuck is heated for tool insertion, then the tool holder expands to allow tool insertion, but the shrink chuck warps which impairs concentricity
Solution Approach 1:
The patent applies a thermal insulation coating specifically in the area surrounding the tool holder where heat transfer occurs during induction heating. This localized treatment ensures that heat is directed primarily to the tool holder for expansion while preventing heat from reaching the chuck body, thereby avoiding warping and maintaining concentricity during tool insertion operations.
2Strength
If the shrink chuck is cooled for tool clamping, then the tool holder contracts to clamp the tool, but the shrink chuck warps which impairs concentricity
Solution Approach 1:
The thermal insulation coating is applied locally around the tool holder to control heat flow during both heating and cooling cycles. During cooling, this insulation prevents unwanted heat transfer that could cause uneven contraction and warping, ensuring the chuck maintains its concentricity while still achieving strong tool clamping force through controlled thermal contraction of the tool holder.
3Productivity
If induction heating is applied to the shrink chuck, then the tool holder expands for tool insertion, but excessive heat transfer to the chuck body causes warping
Solution Approach 1:
The thermal insulation coating acts as an intermediary layer between the induction heating field and the chuck body. This intermediate layer allows rapid heating of the tool holder for quick tool changes while blocking excessive heat transfer to the chuck body, thereby preventing warping and maintaining concentricity even during high-speed tool change operations.
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 solution ensures high concentricity and prevents warping by distributing thermal loads uniformly, enhancing the chuck's performance and longevity through even heating and cooling, while also preventing temper colors and corrosion.
Implementation Method 1
the first section is coated at least in some areas with a first layer and the second section is coated at least in some areas with a second layer, the first layer being a thermally conductive layer and the second layer being a thermally conductive layer
Implementation Method 2
the heating and cooling of the shrink chuck can lead to the shrink chuck warping
Implementation Method 3
induction heating being provided in the region of the rotating end of the spindle shaft
Implementation Method 4
As the shrink chuck cools down, the tool holder of the shrink chuck contracts again, which clamps the tool
Data Source
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AI summary
The description includes a shrink-fit chuck for clamping a tool in a shrink fit, wherein the shrink-fit chuck comprises: a first section 102 for receiving the tool, wherein the first section 102 is suitable for receiving a tool in a heated state and for clamping the tool in a cooler state, and a second section 103, 104, wherein the second section 103, 104 is suitable for coupling to a motor spindle of a machine tool, wherein at least in certain areas the surface of the first section 102 and/or the surface of the second section 103, 104 is coated with a first layer.