Scratch Removal Device with Slurry Cooling and Pressure Control
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Solution Overview
Problem
Existing rotary tools for polishing glass surfaces are limited in their ability to efficiently remove scratches and maintain optical clarity, particularly on contoured surfaces like windshields, due to inadequate control over pressure and slurry distribution.
Innovation Solution
A scratch removal system incorporating a DC brushless motor, slurry pumping system, and slurry cooling system, which includes a rotating shaft with a conical shroud and interchangeable pads for both 'fining' and 'polishing' operations, allowing for precise control over the polishing process and temperature management of the slurry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rotary tool is used to grind and polish glass surfaces, then scratches can be removed from the glass, but the tool lacks precise control over pressure and slurry distribution
Solution Approach 1:
The system incorporates sensors that detect the condition of the glass surface and automatically adjust the pressure applied by the rotary tool and the distribution of polishing slurry. This closed-loop feedback mechanism ensures consistent polishing quality while eliminating the need for manual pressure control, directly resolving the contradiction between manufacturing precision and ease of operation.
Solution Approach 2:
The rotary tool is equipped with an automated slurry delivery system that self-regulates the flow and distribution of polishing slurry based on real-time monitoring of the polishing process. This self-service capability allows the tool to maintain optimal slurry distribution without external intervention, improving both scratch removal quality and operational simplicity.
2Productivity
If high pressure is applied to remove scratches quickly, then productivity increases, but the glass surface may develop gouges or burnished spots
Solution Approach 1:
The system dynamically adjusts the pressure applied by the rotary tool based on real-time feedback from sensors monitoring the glass surface condition. The pressure is continuously optimized to maintain the highest possible removal rate while preventing the formation of gouges or burnished spots, thereby resolving the contradiction between productivity and surface quality through dynamic adaptation rather than static high pressure.
Solution Approach 2:
The system employs multiple adjustable parameters including pressure, rotational speed, and slurry flow rate that can be independently optimized and adjusted during the polishing process. By changing these parameters dynamically based on the specific scratch conditions and glass type, the system achieves both high productivity and superior surface quality, eliminating the need to choose between speed and precision.
3Manufacturing precision
If the slurry temperature is not controlled, then the system is simpler, but the polishing efficiency and surface quality deteriorate
Solution Approach 1:
The system incorporates temperature control of the polishing slurry as a critical parameter, maintaining it within an optimal range to enhance polishing efficiency and achieve superior optical clarity. The temperature is monitored and adjusted automatically, and the patent demonstrates that this parameter control significantly improves surface quality while the added complexity is justified by the substantial improvement in manufacturing precision.
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 system effectively removes scratches by providing high-speed rotation, controlled pressure, and temperature-regulated slurry distribution, resulting in an optically satisfactory surface finish on contoured glass surfaces.
Implementation Method 1
The motor may be a DC brushless motor operable in the range of 4000 to about 5000 rpm
Implementation Method 2
A portion of the slurry carrying member is positioned in the cavity and in engagement with the cooling material
Implementation Method 3
A vacuum is supplied to the interior of the shroud to hold the shroud onto the polishing surface under vacuum force
Implementation Method 4
The scratch removal tool includes a motor, a housing, a rotatable shaft and a head assembly
Data Source
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AI summary
A scratch removal tool that includes a motor, a housing, a rotatable shaft operably coupled to the motor and movable in an axial direction along a length of the shaft, and a head assembly. The head assembly includes a shroud member having an open end, a pad member, a slurry input, a slurry output, and a seal member. The pad member is positioned within the shroud and mounted to the shaft. Rotation of the shaft rotates the pad member. Axial movement of the shaft moves the pad member relative to the open end of the shroud. The slurry input and slurry are in fluid communication with the pad member. The seal member is positioned at the open end of the shroud.