Tin-Based Tacking Layer for Abrasive Particle Retention
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Solution Overview
Problem
Conventional abrasive wire saws face challenges in maintaining tensile strength and abrasive particle retention, leading to premature failure and reduced productivity, especially when cutting hard materials, due to costly electroplating and sintering processes, and resin bonding which wears quickly.
Innovation Solution
A method of forming abrasive articles with a substrate coated by a tin-based tacking layer and specific abrasive particle distributions, including a wide grit size range and controlled concentrations, to enhance bonding and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electroplating or sintering processes are used to attach abrasive particles, then abrasive particle retention is improved, but manufacturing time and cost increase significantly
Solution Approach 1:
The patent extracts the abrasive particles from the electroplating/sintering process and attaches them directly to the wire using a different mechanism (adhesive bonding or mechanical interlocking), eliminating the need for time-consuming electroplating or sintering operations while maintaining particle retention
Solution Approach 2:
The patent introduces an intermediary substance or mechanism between the wire and abrasive particles that enables attachment without requiring electroplating or sintering, thereby reducing manufacturing time while ensuring adequate particle retention during cutting operations
2Ease of manufacture
If resin bonding is used to attach abrasive particles, then manufacturing cost is reduced, but tool life decreases due to quick wear
Solution Approach 1:
The patent employs a composite bonding approach that combines resin with additional reinforcing elements or structures, creating a hybrid bonding system that maintains the cost advantages of resin while significantly improving wear resistance and extending tool life
Solution Approach 2:
The patent applies different bonding characteristics to different regions or aspects of the abrasive attachment, using resin for cost-effective bonding while incorporating localized reinforcement or protective features in high-wear areas to extend overall tool life
3Reliability
If brazing is used to attach abrasive particles, then abrasive particle retention is improved, but tensile strength of the wire saw decreases
Solution Approach 1:
The patent removes the brazing process from the attachment method and replaces it with an alternative mechanism that achieves adequate particle retention without the high temperatures and chemical reactions that compromise wire tensile strength
Solution Approach 2:
The patent introduces an intermediary bonding mechanism that attaches abrasive particles to the wire without requiring brazing, thereby maintaining particle retention while preserving the wire's tensile strength and resistance to breaking under tension
4Productivity
If conventional wire saws are used for cutting hard materials, then productivity is maintained, but kerf loss increases and tool failure occurs prematurely
Solution Approach 1:
The patent modifies key parameters of the wire saw system, including abrasive particle characteristics, bonding method, and wire structure, to achieve more efficient cutting of hard materials that reduces kerf loss while maintaining productivity and preventing premature tool failure
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 improves the tensile strength and abrasive particle retention, leading to increased durability and productivity in cutting hard materials, such as crystalline materials in the electronics industry, with reduced wear and extended tool life.
Implementation Method 1
forming a tacking layer overlying a surface of the substrate, the tacking layer comprising tin
Data Source
AI summary
An abrasive article including a substrate having an elongated body, a tacking layer overlying the substrate, and a first type of abrasive particle overlying the tacking layer and defining a first abrasive particle concentration at least about 10 particles per mm of substrate.