Abrasive Wire Saw Metallic Bonding via Solder Tacking Film
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Solution Overview
Problem
Conventional abrasive wire saws face challenges in rapid production due to time-consuming electroplating and sintering processes, and existing bonding methods reduce tensile strength and lead to premature failure during high-tension cutting applications, especially in the electronics industry where kerf loss is significant.
Innovation Solution
An abrasive article is formed using a substrate with a tacking film made of solder material with a melting point not exceeding 450°C, where abrasive particles are bonded to the film through a metallic bonding region and a subsequent bonding layer, enhancing wear resistance and particle retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electroplating or sintering is used to attach abrasive particles to the wire, then the abrasive particles are securely bonded, but the production process becomes time-consuming and costly
Solution Approach 1:
The patent changes the bonding mechanism from electroplating/sintering to a thermal process using solder material with controlled melting point. The tacking film is applied by heating the wire to a temperature above the melting point of the solder material, causing it to melt and bond the abrasive particles securely without requiring lengthy electroplating or sintering cycles, thus achieving both secure bonding and rapid production
Solution Approach 2:
The patent replaces the electrochemical (electroplating) and thermal-sintering processes with a simpler thermal melting process. The solder material melts at a controlled temperature to form a bonding layer, substituting complex industrial processes with a more efficient thermal bonding mechanism that maintains particle retention while dramatically reducing production time
2Reliability
If brazing is used to attach abrasive particles, then bonding strength is achieved, but the tensile strength of the wire saw is reduced making it susceptible to breaking
Solution Approach 1:
The patent changes the bonding temperature and material properties by using solder material with a melting point specifically selected to be below the wire's melting point but sufficient to bond particles. This parameter control ensures strong particle attachment while preserving the wire's tensile strength, avoiding the damage caused by high-temperature brazing
Solution Approach 2:
The patent introduces a tacking film made of solder material as an intermediary bonding layer between the wire and abrasive particles. This intermediary layer provides the necessary bonding strength to hold particles securely while being applied at temperatures that do not compromise the wire's structural integrity, unlike direct brazing which weakens the wire
3Ease of manufacture
If resin is used to bind abrasives to the wire, then particle attachment is achieved, but the wire saw wears quickly and abrasives are lost before useful life is realized
Solution Approach 1:
The patent replaces organic resin bonding with inorganic solder material bonding. The solder material melts and forms a metallurgical bond that is far more heat-resistant and wear-resistant than organic resins. This substitution eliminates the rapid wear and particle loss problem inherent in resin-bonded wire saws while maintaining ease of manufacture through the simplified thermal process
Solution Approach 2:
The patent creates a composite structure consisting of the wire substrate, solder material tacking film, and abrasive particles. This composite construction combines the strength and heat resistance of metal solder with the cutting capability of abrasives, producing a wire saw that resists wear and maintains particle retention throughout its useful life, unlike resin-based composites that degrade quickly
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
This approach enables the production of abrasive articles with improved wear resistance and enhanced abrasive particle retention, suitable for high-tension cutting applications, particularly in the electronics industry, by forming a metallic bonding region between the abrasive particles and the tacking film, thus addressing the limitations of existing methods.
Implementation Method 1
a tacking film overlying the substrate comprising a solder material having a melting point of not greater than about 450° C.
Implementation Method 2
treating the tacking film to bind the coating layer and the tacking film to each other
Data Source
AI summary
An abrasive article may include a substrate, a tacking film overlying the substrate, abrasive particles that may include a coating layer bonded to the tacking film such that a bond between the coating layer and the tacking film defines a metallic bonding region, and a bonding layer overlying the abrasive particles and the tacking film.