Ceramic Blade Edge Geometry for Controlled Sharpness and Safety
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Solution Overview
Problem
Conventional cutting tools, particularly metal and ceramic blades, become dangerously sharp during use, leading to safety hazards at both the beginning and end of their sharpening cycle due to rapid dulling and increased cutting force requirements.
Innovation Solution
A ceramic blade with a primary and micro grind angle based on predetermined ratios, measured and compared to ensure a controlled sharpness, reducing the risk of lacerations and punctures by intentionally lowering sharpness while maintaining effective cutting performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional sharpening methods are used to maximize blade sharpness, then cutting performance is improved, but safety hazards increase due to dangerously sharp edges that cause lacerations and punctures
Solution Approach 1:
The patent changes the sharpness parameter of the blade edge by controlling the grind angle and edge radius during manufacturing. Instead of maximizing sharpness, the system creates an edge with specific geometric parameters (controlled radius and angle) that provide adequate cutting performance while reducing excessive sharpness that causes safety hazards. This parameter optimization allows the blade to cut effectively without creating dangerously sharp edges.
2Productivity
If blades are made as sharp as possible to extend time between sharpening, then productivity is improved, but blade life decreases due to rapid dulling
Solution Approach 1:
The patent optimizes the edge geometry parameters (grind angle, edge radius) to create a balance between sharpness and durability. By controlling these parameters, the blade achieves sufficient sharpness for extended use while maintaining structural integrity that prevents rapid dulling. This creates an optimal service life that balances cutting performance with blade longevity.
3Productivity
If conventional sharpening creates extremely sharp edges, then cutting efficiency is improved, but cutting force requirements increase leading to dull blade injuries
Solution Approach 1:
The patent modifies the edge geometry parameters to optimize the relationship between cutting efficiency and force requirements. By controlling the edge radius and grind angle, the system creates an edge that cuts effectively with reasonable force, avoiding the extreme sharpness that causes high force requirements and associated injuries.
4Productivity
If blades are sharpened to maximum sharpness, then initial cutting performance is improved, but the blade becomes dangerous to handle and use
Solution Approach 1:
The patent optimizes edge geometry parameters to create a blade that is sharp enough for effective cutting but not so sharp that it becomes dangerous to handle. By controlling the edge radius and grind angle within specific ranges, the system achieves adequate cutting performance while maintaining safety during handling and operation.
Data Source
AI summary
A method is disclosed. The method includes providing a ceramic blade having a thickness and a ceramic cutting edge portion, providing a primary grind having a primary angle to the ceramic cutting edge portion based on a predetermined primary ratio, and providing a micro grind having a micro angle to the ceramic cutting edge portion based on a predetermined micro ratio. The predetermined primary ratio is a predetermined thickness divided by a predetermined primary angle. The predetermined micro ratio is the predetermined thickness divided by a predetermined micro angle. The method includes measuring at least one of the thickness, the primary angle, and the micro angle, and comparing at least one of the measured thickness to the predetermined thickness, the measured primary angle to the predetermined primary angle, and the measured micro angle to the predetermined micro angle.