Bonded Abrasive Composition for Precise Gear Power Honing
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Solution Overview
Problem
Current bonded abrasive articles for gear power honing lack optimal performance in terms of abrasive efficiency and durability, particularly in maintaining low surface roughness and high bond post area distribution, which affects the precision and longevity of gear grinding processes.
Innovation Solution
A bonded abrasive article comprising an inner annular surface with teeth, an inorganic bond material, and abrasive particles, where the bond material composition and particle distribution are optimized to achieve a specific average surface roughness and bond post area, ensuring improved performance in gear power honing through a precise manufacturing process involving a mixture of abrasive particles and bond material precursors, pressing, and firing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional bonded abrasive articles are used for gear power honing, then basic grinding function is provided, but abrasive efficiency and durability are insufficient, resulting in high surface roughness and low bond post area distribution
Solution Approach 1:
The patent applies parameter changes by optimizing the bond material composition (specific ratios of alumina, silica, boron oxide, barium oxide, calcium oxide, and zinc oxide) and controlling firing temperature (800-1000°C) to achieve the desired balance between surface finish quality and tool durability. This chemical composition optimization directly addresses the contradiction by tuning material parameters to simultaneously improve both precision and reliability
Solution Approach 2:
The patent uses composite materials by creating a multi-component bond material system combining alumina, silica, boron oxide, barium oxide, calcium oxide, and zinc oxide in specific proportions. This composite approach enables the bond material to simultaneously provide the hardness needed for durability and the controlled reactivity needed for maintaining low surface roughness, resolving the trade-off between reliability and manufacturing precision
2Productivity
If conventional abrasive articles are used, then basic material removal is achieved, but abrasive efficiency is low affecting productivity
Solution Approach 1:
The patent optimizes physical parameters including abrasive particle size distribution (combining coarse 80-120 mesh and fine 200-400 mesh particles), bond material composition ratios, and firing temperature to achieve optimal abrasive efficiency. The specific parameter tuning enables faster material removal while controlling surface roughness, directly improving productivity without sacrificing precision
3Reliability
If the bond material is made harder to improve durability, then longevity increases, but abrasive efficiency decreases affecting precision
Solution Approach 1:
The patent creates a composite bond material where alumina (40-60 wt%) provides hardness and durability, while silica (20-40 wt%) and boron oxide (10-30 wt%) contribute to controlled reactivity and bonding characteristics. This composite structure enables the bond to be sufficiently hard for longevity while maintaining the flexibility and reactivity needed for effective material removal and precision surface finishing
Solution Approach 2:
The patent applies local quality by creating different functional zones within the bond material structure through controlled particle distribution and phase formation during firing. The bond material exhibits varying local properties - harder regions for durability and more reactive regions for abrasive efficiency - allowing simultaneous achievement of longevity and productivity
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 enhances the abrasive article's efficiency and durability, achieving a low average surface roughness and optimal bond post area distribution, thereby improving the precision and longevity of gear grinding processes, as demonstrated by the Gear Power Honing Test results.
Implementation Method 1
firing the green body into a fully formed abrasive article
Data Source
AI summary
The subject application relates to a bonded abrasive for gear power honing. An abrasive article including a bonded abrasive body having abrasive particles and a bond material. The abrasive body can include an inner annular surface with at least 1 tooth. The abrasive article can provide an average Ffβ of less than 2.0 according to a Gear Power Honing Test.