Abrasive Particles with Asymmetric Geometry for Random Orientation
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Solution Overview
Problem
Existing abrasive articles with selectively oriented abrasive particles are difficult and expensive to produce, often lacking the desired degree of rotational orientation and being limited in the variety of particle sizes and shapes that can be used.
Innovation Solution
A coated abrasive article with abrasive particles oriented in a controlled manner, where the z-direction rotational orientation varies randomly within a defined range, allowing for a wide range of particle sizes and shapes to be utilized, and is easier and less expensive to produce.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If abrasive particles are selectively oriented using prior art methods (electrostatic force, surface features, alignment aids), then rotational orientation control is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent extracts the orientation control function from complex manufacturing processes and transfers it to the abrasive particles themselves through asymmetric geometry. By giving particles an asymmetric shape with a defined reference axis, the orientation control is built into the particle structure rather than requiring external control mechanisms during manufacturing.
Solution Approach 2:
The asymmetric particle geometry enables self-orientation during the manufacturing process. The particles naturally align themselves based on their asymmetric shape characteristics when subjected to standard coating processes, eliminating the need for complex external alignment mechanisms or specialized equipment.
2Manufacturing precision
If prior art methods are used to achieve selective rotational orientation, then orientation precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent uses inexpensive asymmetric particle geometries that can be mass-produced through standard forming processes. The orientation control is achieved through the particle shape itself rather than through expensive specialized manufacturing equipment or processes, making the solution economically viable.
Solution Approach 2:
The patent changes the geometric parameters of the abrasive particles by introducing asymmetric shapes with specific reference axes. This parameter change in particle geometry enables orientation control without requiring changes to the manufacturing process parameters or equipment, thereby avoiding increased manufacturing costs.
3Manufacturing precision
If prior art methods are used for particle orientation, then rotational orientation control is improved, but particle size and shape versatility decreases
Solution Approach 1:
The asymmetric particle geometry concept serves multiple functions: it provides orientation control, maintains mechanical strength, and allows for various sizes and shapes. The same basic asymmetric shape principle can be applied to different particle sizes, materials, and specific geometric configurations, making the approach universally applicable across diverse abrasive particle types.
Solution Approach 2:
The patent applies local asymmetric geometry features to specific regions of the particle (creating a defined reference axis) while allowing the rest of the particle to vary in size, shape, and material composition. This localized approach to asymmetry enables orientation control without constraining the overall particle design flexibility.
Data Source
Figure 1a~1b
Figure 2~2a
Figure 3~4
AI summary
An abrasive article includes a plurality of abrasive particles and the rotational orientation of at least a portion of the abrasive particles about the z-axis varies randomly within a defined range, and the spacing of the abrasive particles along the y-axis varies randomly.