Patterned Abrasive Substrate With Wear Indicators and Particle Orientation
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Solution Overview
Problem
Existing abrasive articles have limited performance and lifespan due to wear of abrasive particles, and there is a need for improved manufacturing processes to produce higher performing abrasive articles with better wear resistance and cutting efficiency.
Innovation Solution
The development of shaped abrasive particles with predetermined geometries, such as equilateral triangular pyramids and tetrahedrons, made from sintered alpha alumina, which are produced through a multi-step process involving mold formation, drying, calcining, and sintering, and can be coated with magnetic materials for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional abrasive particles are used, then manufacturing is simpler, but cutting efficiency and wear resistance are lower
Solution Approach 1:
The patent changes the geometric parameters of abrasive particles from irregular shapes to predetermined regular geometries (spheres, cubes, tetrahedrons, octahedrons, dodecahedrons). This parameter change in particle shape improves cutting efficiency by providing consistent cutting edges and predictable wear patterns, while the systematic manufacturing process manages the complexity increase through standardized procedures.
Solution Approach 2:
The patent uses composite material structures where abrasive particles are embedded in binder materials to form abrasive articles. The combination of different materials (abrasive particles made from alumina, silicon carbide, boron carbide, diamond, or cubic boron nitride with various binder materials) allows optimization of both cutting performance and structural integrity, resolving the contradiction between simplicity and performance.
2Productivity
If abrasive particles wear down, then material removal occurs, but article lifespan decreases
Solution Approach 1:
The patent applies preliminary action by pre-forming abrasive particles with optimal geometries and pre-embedding them in the binder material at controlled orientations before the article is used. This preliminary structuring ensures that particles are positioned to maximize cutting efficiency from the start while their predetermined shapes are designed to maintain effectiveness throughout extended use, thereby extending article lifespan.
Solution Approach 2:
The patent changes the wear characteristics by using particles with predetermined regular geometries instead of irregular shapes. These geometric parameters are optimized so that as particles wear, they maintain cutting edges more effectively than conventional particles, thereby extending the functional lifespan of the abrasive article while maintaining high material removal rates.
3Productivity
If random particle orientation is used, then manufacturing is easier, but cutting performance is reduced
Solution Approach 1:
The patent applies preliminary action by pre-orienting abrasive particles during the manufacturing process before the binder cures. The particles are positioned at specific orientations that optimize cutting performance, and this preliminary arrangement is locked in place as the binder sets. This approach achieves superior cutting performance through controlled orientation while managing manufacturing complexity through a systematic alignment process.
Solution Approach 2:
The patent changes the orientation parameter of abrasive particles from random to controlled specific angles and positions. By optimizing particle orientation parameters during manufacturing, the cutting performance is significantly improved as particles engage the workpiece at optimal angles, while the manufacturing process incorporates systematic methods to achieve this alignment.
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 shaped abrasive particles exhibit improved cutting performance and wear resistance, allowing for more efficient material removal and extended abrasive article lifespan, with the magnetic coating enabling better control and orientation for enhanced cutting efficiency.
Implementation Method 1
the magnetic coating enabling better control and orientation for enhanced cutting efficiency
Implementation Method 2
made from sintered alpha alumina, which are produced through a multi-step process involving mold formation, drying, calcining, and sintering
Data Source
AI summary
Abrasive articles and associated methods are shown that include abrasive particles arranged in one or more symbols on a backing substrate. Examples include shaped abrasive particles arranged into one or more symbols. Other examples include one or more wear particles with a height less than other abrasive particles, such that when exposed, the wear particles indicate a wear condition of the abrasive article.