Reusable Hub Assembly for Abrasive Wheels
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Solution Overview
Problem
Existing bonded abrasive wheels suffer from significant material waste and reduced performance due to the attachment mechanism, where the hub overlaps the grinding surface, limiting usable area and causing vibration issues during operation.
Innovation Solution
A reusable hub system with an adhesive-free, interlocking connection to the abrasive wheel, allowing for multiple uses and improved damping of vibrations, which reduces waste and maintains consistent material removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a traditional bonded hub with adhesive connection is used, then the hub is securely attached to the abrasive wheel, but the hub overlaps the grinding surface reducing usable area and causing vibration issues
Solution Approach 1:
The hub assembly is divided into separate functional components: a reusable hub body and a sacrificial bonding flange. The bonding flange contains the adhesive bonding cavity and is discarded after one use, while the hub body is reused with new bonding flanges. This segmentation allows the hub body to not overlap the grinding surface while maintaining secure attachment through the bonding flange.
Solution Approach 2:
The adhesive bonding function is extracted into a separate bonding flange component that can be discarded after one use. This allows the main hub body to be designed without overlapping the grinding surface, as the bonding function is contained in the removable flange rather than requiring a large overlapping hub structure.
2Strength
If a traditional bonded hub is used, then the hub provides structural support, but the adhesive bond and hub overlap cause vibration during operation
Solution Approach 1:
The adhesive bonding function is extracted into a separate bonding flange component. This allows the hub body to be made from vibration-damping materials without the compounding effect of adhesive layers and overlapping structures that generate vibration. The bonding flange provides the necessary structural connection while being thinner and less vibration-prone.
Solution Approach 2:
The hub body can be manufactured from materials with optimized vibration damping properties, such as sintered metal or composite materials, without being constrained by adhesive bonding requirements. The bonding flange uses controlled adhesive amounts in a defined cavity, reducing excess adhesive that would cause vibration.
3Strength
If a traditional bonded hub with epoxy resin is used, then the hub is chemically bonded to the wheel, but the bonded construction creates waste material that cannot be reused
Solution Approach 1:
The hub assembly is segmented into a reusable hub body and a sacrificial bonding flange. The bonding flange contains the epoxy resin and is discarded after one use, while the hub body is cleaned and reused with a new bonding flange. This segmentation allows the expensive hub body to be preserved while the inexpensive bonding flange absorbs the waste from the adhesive bonding process.
Solution Approach 2:
The bonding flange is designed as a disposable component that is discarded after one bonding operation, while the hub body is recovered and reused. The bonding flange contains the epoxy resin and bonding interface, so when it is discarded, the waste is confined to the flange rather than the entire hub assembly. The hub body can be cleaned and prepared for the next bonding operation.
4Strength
If a depressed center design with tapered portion for bond resin is used, then the hub accommodates the bonding structure, but the production process becomes more difficult
Solution Approach 1:
The bonding structure is segmented into a separate bonding flange component rather than being integrated into the hub body. This allows the hub body to have a simpler, easier-to-manufacture geometry without the complex depressed center and tapered portions needed to accommodate bond resin. The bonding flange contains the bonding cavity and resin, simplifying the hub body manufacturing process.
Data Source
AI summary
A method of reusing a hub in an abrasive assembly is presented that includes removably coupling the abrasive wheel to a reusable hub. The abrasive wheel has an outer circumference and an inner circumference. The abrasive article has an inner circumference and an outer circumference. The method also includes abrading a worksurface by contacting the abrasive wheel to the worksurface. The reusable hub includes a coupling feature configured to directly couple to the abrasive article. The coupling feature includes an adhesive-free connection between the reusable hub and the abrasive wheel. The direct connection is a removable interlocking between the abrasive wheel and the reusable hub.