Abrasive Particles with Fracture Portions for Orientation Control
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Solution Overview
Problem
There is a need to improve the cost, performance, and life of abrasive particles and articles used for abrading, finishing, or grinding various materials, as existing technologies face challenges in achieving optimal orientation and sharpness of abrasive particles, leading to reduced efficiency and increased manufacturing costs.
Innovation Solution
A mold design that creates abrasive particles with a polygonal shape and a fracture portion, which breaks off during a stress event, resulting in a fractured shape that enhances sharpness and orientation, using a magnetic field to align the particles perpendicular to the web direction and achieve a desired rake angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional abrasive particles are used, then manufacturing cost is reduced, but orientation control and sharpness are insufficient
Solution Approach 1:
The abrasive particle is segmented into a main body and a protrusion portion, where the protrusion serves as a magnetic alignment feature that enables precise orientation control during manufacturing while the main body provides the abrasive function
Solution Approach 2:
The magnetic alignment features (protrusions) are built into the particle structure during manufacturing, allowing preliminary orientation control before the abrasive particle is applied to the workpiece, thereby achieving precise alignment without complex post-processing
2Manufacturing precision
If conventional abrasive particles are used, then manufacturing process is simple, but sharpness and cutting performance are reduced
Solution Approach 1:
The particle structure is divided into a main body and a protrusion portion, where the protrusion creates sharp edges when fractured, significantly improving cutting performance while maintaining a relatively simple overall structure that can be manufactured using standard processes
Solution Approach 2:
The protrusion portion creates an asymmetric structure on the abrasive particle, which generates sharp edges during fracture and improves cutting performance. The asymmetric geometry also provides magnetic alignment features for better orientation control
3Productivity
If abrasive particles lack orientation control, then manufacturing process is simple, but cutting rate and performance are reduced
Solution Approach 1:
Magnetic alignment features are incorporated into the particle structure during manufacturing, enabling preliminary orientation control. This allows the particles to self-align during application without requiring complex external alignment systems, thereby improving cutting rate while minimizing added 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 solution enables improved orientation and sharpness of abrasive particles, leading to increased cutting rates, reduced wear, and lower manufacturing costs by allowing for more precise control over particle alignment and sharper edges, thus enhancing the performance and longevity of abrasive articles.
Implementation Method 1
using a magnetic field to align the particles perpendicular to the web direction and achieve a desired rake angle
Data Source
AI summary
A mold for making abrasive particles is presented. The mold includes a surface and a plurality of cavities extending downward from the surface. Each cavity includes a particle shape portion comprising a polygonal shape and a fracture portion coupled to the particle shape portion. The fracture portion is configured to break from the particle shape portion during a stress event, resulting in a fractured shape abrasive particle.