Abrasive Articles with Friability-Blended Particles
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Solution Overview
Problem
There is a need for improved abrasive surfaces and layers in abrasive articles that offer enhanced processing performance, efficiency, and surface quality, as existing abrasive products do not adequately meet the demands for advanced material removal and durability in industrial applications.
Innovation Solution
The development of abrasive articles featuring a blend of abrasive particles with different abrasive characteristics, including ceramic and fusion grains, applied in a specific layer configuration with a polymeric binder and size coat, which enhances material removal performance and reduces grinding energy and belt wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single type of abrasive particle is used in the abrasive layer, then the article structure is simple, but the material removal efficiency and surface quality are insufficient
Solution Approach 1:
The abrasive layer comprises a composite blend of at least two different abrasive particles (e.g., aluminum oxide and silicon carbide) with different hardness, friability, and cutting mechanisms. This composite approach enables the abrasive article to simultaneously achieve high material removal efficiency and superior surface finish quality, resolving the contradiction between productivity and performance by combining the advantages of different abrasive materials.
Solution Approach 2:
Different regions of the abrasive layer or different particle types within the layer are optimized for specific functions: harder particles (e.g., silicon carbide) are positioned or selected for areas requiring high material removal, while softer, more friable particles (e.g., aluminum oxide) are used for surface finishing regions. This local optimization allows the single abrasive layer to perform multiple functions effectively.
2Productivity
If high hardness abrasive particles are used to increase material removal rate, then productivity improves, but specific grinding energy increases and belt wear accelerates
Solution Approach 1:
The patent optimizes the physical and chemical parameters of the abrasive particles, including hardness, friability, and size distribution. By selecting particles with specific parameter ranges (e.g., controlled friability of aluminum oxide particles), the article achieves high material removal rates while maintaining lower specific grinding energy and reduced belt wear, resolving the contradiction through precise parameter control.
Solution Approach 2:
The blend of abrasive particles with different friability characteristics ensures continuous effective cutting action. As harder particles wear, softer particles continue to provide cutting edges, maintaining consistent material removal efficiency throughout the belt's service life without requiring excessive grinding energy or causing accelerated wear.
3Manufacturing precision
If conventional abrasive particles are used, then manufacturing is simple, but surface quality and finishing precision are insufficient
Solution Approach 1:
The abrasive layer uses a composite blend of at least two different abrasive particles with complementary properties (e.g., aluminum oxide for structural integrity and silicon carbide for sharp cutting edges). This composite structure enables superior surface finish quality and manufacturing precision while the particles are applied using conventional coating techniques, minimizing the increase in manufacturing complexity.
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 abrasive article with a blend of abrasive particles demonstrates improved material removal efficiency, reduced specific grinding energy, and extended belt life, outperforming comparative samples in abrasive testing by achieving higher cumulative cuts with lower belt wear and maintaining performance beyond standard limits.
Implementation Method 1
Abrasive articles have been used to abrade and finish work-piece surfaces. Abrasive articles are used in various industries to machine work pieces, such as by lapping, grinding, and polishing.
Data Source
AI summary
An abrasive article including a substrate; and an abrasive layer overlying the substrate, where the abrasive layer includes a blend of abrasive particles including a first type of abrasive particle comprising a polycrystalline material and having a first average friability F1, and a second type of abrasive particle comprising a polycrystalline material and having a second average friability, F2, where the blend comprises an average friability difference, ΔF=|F1−F2|, within a range of at least 0.5% to not greater than 80%.