High Density Metal Coating for Percussive Tool Vibration Attenuation
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Solution Overview
Problem
Existing vibration dampening methods for percussive tools like rivet guns are inadequate, leading to ergonomic issues and tool instability during high-impact applications, as they either compromise tactile feedback or fail to effectively attenuate vibrations in metal structures.
Innovation Solution
A coating system comprising high density metal pellets, such as tungsten carbide, embedded in an adhesive material with a polymer overlay, applied to the tool to enhance mass and vibration attenuation, providing a thickness of at least 0.25 inches and 90% weight percentage of metal pellets for improved ergonomics and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If known vibration dampening methods (springs, air, viscoelastic materials) are incorporated in rivet guns, then vibration attenuation is improved, but tactile sensory feedback is decreased or lost
Solution Approach 1:
The patent applies composite materials by combining high density metal particles (such as tungsten carbide or lead) embedded in a polymer matrix material to create a coating composition. This composite structure provides vibration attenuation through the high density metal particles while the polymer matrix maintains structural integrity and tactile feedback properties, resolving the contradiction between vibration dampening and tactile sensory feedback.
2Ease of operation
If vibration dampening gloves incorporating gel or spongy material are used, then low impact riveting is improved, but high impact riveting effectiveness is reduced
Solution Approach 1:
The patent changes the physical parameters of the coating by adjusting the particle size distribution, metal content concentration, and polymer matrix properties to create a coating that can handle high impact forces. The coating is applied directly to the rivet gun tool rather than as gloves, and its rigid composite structure provides the necessary support for high impact riveting while still attenuating vibrations.
3Object-affected harmful factors
If recoilless rivet guns are used, then gentler impact is achieved, but drive time increases and vibration attenuation is reduced
Solution Approach 1:
The patent extracts the vibration attenuation function from the rivet gun's mechanical structure and implements it as a separate coating layer applied to the tool's exterior surfaces. This allows the rivet gun to maintain its original recoilless mechanism for gentle impact while the added coating provides independent vibration dampening without interfering with the drive mechanism or increasing drive time.
4Ease of operation
If mass is added to bucking bars, then ergonomics are improved, but tool control and stability are not enhanced
Solution Approach 1:
The patent applies local quality by coating only specific surfaces of the rivet gun tool that are in contact with the user's hand or exposed to vibrations during operation. This localized coating approach adds mass and vibration attenuation properties where needed for ergonomics while maintaining the tool's overall balance and control characteristics, preventing unwanted tool marks on workpieces.
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 coating system significantly reduces unwanted ergonomic effects and improves control by effectively attenuating vibrations, allowing for reduced tool marks and increased efficiency in high-impact applications.
Implementation Method 1
The coating system significantly reduces unwanted ergonomic effects and improves control by effectively attenuating vibrations
Data Source
AI summary
A method of making a coating applied to an article is provided. The method includes preparing at least one substrate on the article to be coated, to obtain at least one prepared substrate. The method further includes preparing the coating, obtained by disposing a plurality of high density metal pellets in an adhesive material, to form a metal adhesive matrix, and adding a polymer material over the metal adhesive matrix. The plurality of high density metal pellets is in an amount of at least 90% (ninety percent) by weight of the total weight percent of the coating. The method further includes applying the coating to the prepared substrate, to obtain a mass-enhanced, coated article. The coating thickness and the amount of high density metal pellets are sufficient to provide an attenuation of vibration of the coated article and a reduced risk of unwanted ergonomic effects.