Rotating Polishing Disk Cooling With Airfoil Vanes
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Solution Overview
Problem
Polishing machines generate extreme heat during operations, potentially damaging the working surface and equipment, and existing cooling solutions are not effective in preventing heat-related issues like swirl marks and paint burns.
Innovation Solution
A cooling device with a housing and shroud assembly that uses airfoiled vanes to create a pressurized chamber, accelerating air through vents to cool the polishing pad and work surface, attached to a rotating backing plate with a hub and foam pad for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotary buffer is used for fast paint defect removal, then polishing efficiency is improved, but heat generation increases causing paint burns and swirl marks
Solution Approach 1:
A fan assembly is introduced as an intermediary cooling device between the polishing pad and work surface. The fan assembly includes a fan blade that draws air through a housing and directs it through the polishing pad to the work surface, serving as a mediator to remove heat generated during polishing without interfering with the polishing action itself
Solution Approach 2:
The cooling system utilizes pneumatic principles by using a rotating fan blade to create air pressure differential, drawing ambient air through the housing and forcing it through the polishing pad via pressure differential. This pneumatic flow system efficiently removes heat from the work surface during polishing operations
2Object-affected harmful factors
If random orbital machines are used to reduce heat and improve safety, then paint burn risk is reduced, but polishing speed decreases
Solution Approach 1:
The polishing system is segmented into two independent functional components: the polishing mechanism (backing plate with pad) that provides mechanical action, and the cooling mechanism (fan assembly) that provides active cooling. This segmentation allows the polishing machine to maintain high-speed rotation while the separate cooling system removes heat, achieving both high productivity and low heat damage risk
3Ease of operation
If dual action machines are used for controlled polishing, then operator skill requirement is reduced, but heat generation still occurs
Solution Approach 1:
The fan assembly serves as an intermediary cooling device that actively removes heat generated during dual action polishing. The housing directs air flow through the polishing pad, and the fan blade creates the necessary pressure differential to maintain continuous cooling, mediating between the mechanical polishing action and heat accumulation
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
Effectively cools the polishing pad and work surface during rotation, reducing the risk of heat damage and improving safety by preventing swirl marks and paint burns.
Implementation Method 1
The plurality of vanes are shaped as airfoils. The vanes have a rounded leading edge and a sharp trailing edge. Each vane extends from the shroud opening to a periphery of the separator plate.
Implementation Method 2
A plurality of vanes are positioned between the shroud and the separating plate. The plurality of vanes draw air into the cooling device.
Data Source
Figure 1
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Figure 4~5
AI summary
A cooling device for a rotating machine has a fan assembly coupled with a backing plate. A hub, on the backing plate, secures the cooling device with a shaft. The backing plate includes one or more vents to enable air to exit the cooling device. The fan includes an opening to enable air to enter the cooling device. A chamber is formed between the fan assembly and the backing plate. During rotation, air is drawn into the opening. The air is passed into the chamber and exits through the vents to cool a work surface or working pad attached to the backing plate.