Segmented Abrasive Disc Noise Reduction via Asymmetric Slits
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Solution Overview
Problem
Conventional abrasive articles for cutting stone materials and concrete generate excessive noise during operation, particularly at high speeds, and existing noise-reducing technologies are ineffective in stabilizing noise levels across varying production and use conditions.
Innovation Solution
The abrasive article features a circular substrate with segments arranged circumferentially, including an outlet slot, a center slot connected to a noise-absorbing hole that protrudes in the rotating direction, with specific geometric ratios and orientations to minimize wind noise generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional abrasive articles are used for cutting stone materials and concrete, then cutting function is achieved, but excessive noise is generated during operation especially at high speeds
Solution Approach 1:
The substrate is divided into multiple segments arranged circumferentially, with each segment separated by radial slits. This segmentation breaks the continuous rotating surface into discrete sections, reducing the generation of wind noise while maintaining cutting capability across each segment.
Solution Approach 2:
The slits are designed with asymmetric dimensions where the width in the rotational direction is larger than the width in the radial direction. This asymmetric geometry creates specific airflow patterns that reduce noise generation while preserving the structural integrity and cutting function of the abrasive article.
2Object-affected harmful factors
If noise-reducing structures are added to abrasive articles, then noise levels decrease, but mechanical strength and tool reliability may be compromised
Solution Approach 1:
The slits are strategically positioned at specific locations on the substrate, and the noise-absorbing holes are localized to particular regions. This local modification approach reduces noise in critical areas while preserving the overall mechanical strength and structural integrity of the abrasive article.
Solution Approach 2:
The noise reduction is achieved by adding a third dimension through noise-absorbing holes that extend into the substrate thickness direction. This vertical dimension allows noise absorption without compromising the horizontal structural strength needed for cutting operations.
3Object-affected harmful factors
If existing noise-reducing technologies are applied, then some noise reduction is achieved, but noise levels remain unstable under varying production and use conditions
Solution Approach 1:
The segmented structure with radial slits and noise-absorbing holes serves multiple functions simultaneously: it reduces wind noise, maintains structural integrity, ensures stable performance across varying operating conditions, and preserves cutting efficiency. This multi-functionality achieves stable noise reduction across different production and use scenarios.
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 effectively reduces noise levels to acceptable limits during both cutting and idling operations, enhancing the mechanical strength and longevity of the abrasive article while ensuring efficient chip disposal and cooling water supply.
Implementation Method 1
an air vortex generated at the concave part and the convex part cancels out a large air vortex generated by the entire slit, which suppresses the intrinsic vibrational mode of a substrate and lowers wind noise generated during rotation of the cutting tool
Implementation Method 2
prevents the generation of turbulence at the outer periphery of the circular hole
Data Source
AI summary
An abrasive article that may include a circular substrate with a plurality of segments arranged on the circumferential surface of the circular substrate. The abrasive article may also include an outlet slot defining an open space on a peripheral portion of the abrasive article between a first segment and a second segment, a center slot defining an open space in the circular substrate connected to the outlet slot, a noise absorbing hole connected to the center slot and protruding from the center slot in the rotating direction of the abrasive article, and a ratio (H+X)/CSD of at least about 0.01, where H represents a prescribed height of the noise absorbing hole, X represents a prescribed depth of the noise absorbing hole and CSD represents the diameter of the circular substrate.