Multi-abrasive Tool with Sequential Grain Zones
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Solution Overview
Problem
The conventional polishing and grinding processes require multiple steps and abrasive tools with progressively finer grains, leading to increased duration and dead times due to frequent tool changes, especially when polishing surfaces near walls or edges.
Innovation Solution
A multi-abrasive tool with a work face featuring abrasive elements of different roughness arranged in a sequential order, allowing for simultaneous execution of multiple polishing steps with a single tool, reducing the need for frequent tool changes and enhancing edge polishing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional single-abrasive tools are used for polishing, then each polishing step can be performed with a specific grain size, but multiple tool changes are required to achieve different surface finishes
Solution Approach 1:
The patent combines multiple abrasive elements with different grain sizes (coarse, medium, fine) into a single polishing tool head. These abrasive elements are arranged in distinct zones on the work face, allowing the tool to perform multiple polishing steps simultaneously without requiring separate tool changes for each grain size progression.
Solution Approach 2:
The polishing tool is designed with multi-functionality by incorporating abrasive elements of varying grain sizes in different zones. A single tool can thus perform roughing, intermediate, and finishing operations in sequence, making it universal for multiple polishing stages that traditionally required different specialized tools.
2Manufacturing precision
If multiple abrasive tools with different grain sizes are used sequentially, then comprehensive surface polishing can be achieved, but the number of polishing steps and tool changes increases
Solution Approach 1:
The patent merges multiple abrasive functions into one tool by arranging coarse, medium, and fine abrasive elements in different zones of the work face. This allows the polishing process to progress through multiple grain size stages in a single continuous operation, eliminating the need to stop and change tools between steps.
Solution Approach 2:
The polishing process achieves continuity by having all abrasive zones operate simultaneously during a single tool pass. The coarse, medium, and fine abrasive elements work in sequence on the surface without interruption, maintaining continuous useful action rather than requiring pauses for tool changes between polishing stages.
3Loss of time
If a single abrasive tool is used for all polishing steps, then tool changes are minimized, but the ability to achieve progressive surface refinement is compromised
Solution Approach 1:
The polishing tool implements local quality by assigning different grain sizes to different zones of the work face. Each zone (coarse, medium, fine) is optimized for its specific function, with the coarse zone for initial material removal, medium zone for intermediate refinement, and fine zone for final surface polish. This spatial differentiation of properties allows progressive refinement without tool changes.
4Ease of operation
If conventional polishing tools are used near walls or edges, then polishing can be performed in accessible areas, but edge and perimeter polishing efficiency is reduced
Solution Approach 1:
The tool design applies local quality by positioning specific abrasive zones (particularly fine abrasive elements) in locations optimized for edge and perimeter work. The varied grain size distribution across different zones allows the tool to effectively polish both open areas and restricted edge regions within a single operation.
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 approach significantly reduces the number of polishing steps and tool changes, enhances the polishing process near edges, and improves overall efficiency by allowing a single tool to perform multiple functions, thereby decreasing the overall duration of the polishing and grinding processes.
Implementation Method 1
Polishing, or levigation, is a mechanical finishing process for materials adapted to eliminate, or at least reduce, the surface roughness by means of abrasives of various nature
Implementation Method 2
The friction developed by the abrasion also produces a lot of heat
Data Source
AI summary
A multi-abrasive tool is constituted by a support on which abrasive elements are present. Such abrasive elements are arranged in a manner so as to form one or more paths along which the successive abrasive elements have grain size sequentially increasing or decreasing by an arbitrary quantity when passing from on element to the next. Such principle gives rise to abrasive tools with different conformation both for polishing machines and for grindstones. For roto-orbital and planetary polishing machines, and optionally orbital, such support is circular and the grain sequence is circumferential, or radial, or in both directions. A first tool is constituted by contiguous (or non-contiguous) circular rings, that are differently abrasive. A second tool comprises differently abrasive elements arranged along the circular peripheral edge. A third tool comprises differently abrasive elements arranged along a spiral path of 360° starting from the edge. A fourth tool comprises two 180° spiral paths with reversed roughness sequences. A fourth tool comprises pairs of differently abrasive small cylinders fixed to a plate on concentric circumferences. A fifth tool is obtained directly on the plate of the polishing machine by means of reliefs and spacers for fixing differently abrasive sectors. For linear polishing machines, the abrasive support is a belt along which differently abrasive rectangular or oblique zones follow each other. For alternative polishing machines, the abrasive support is a plate shaped like the aforesaid belt. For tools to use with grindstones, the multi-abrasive element has a cylindrical rotation symmetry, or conical with rounded tip, or spherical symmetry.