Cutting Implement With Segmented Thin Edge For Sharpening
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Solution Overview
Problem
Conventional cutting edges with acute angles are difficult to grind and maintain, prone to nicking, and require extensive grinding efforts to restore their shape, making them challenging to use effectively and safely.
Innovation Solution
A cutting implement with a small thickness portion, typically 0.1 to 0.5 mm thick and 2.5 to 20 mm wide, which may have a wavy or jagged edge and is formed with a core material and additional plate materials stacked and fixed together, eliminating the need for a cutting edge on the small thickness portion, allowing for easy sharpening and reduced grinding requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a convex edge with a gentle arc shape is used, then the cutting edge can be formed, but it requires extensive grinding time and effort to restore the shape when blunt
Solution Approach 1:
The blade is divided into distinct sections: a thick main body portion and a thin small thickness portion (0.1-0.5mm). This segmentation allows the cutting edge to be formed on the thin portion while maintaining a robust body, enabling easier sharpening by focusing only on the small thickness portion rather than the entire blade.
Solution Approach 2:
Different parts of the blade have different thicknesses and properties. The small thickness portion (0.1-0.5mm) at the cutting edge provides sharpness and ease of sharpening, while the thicker main body portion provides structural integrity. This local differentiation optimizes both sharpening ease and overall blade performance.
2Ease of manufacture
If a very acute cutting edge is provided to achieve sharpness, then cutting performance is improved, but the edge becomes easily nicked and difficult to grind
Solution Approach 1:
The blade structure transitions from a thin small thickness portion at the cutting edge to a thicker main body portion. This local quality variation allows the acute cutting edge to maintain sharpness while the thicker base provides structural support that prevents nicking and makes the edge more resistant to damage.
Solution Approach 2:
The thicker main body portion acts as a cushioning structure behind the acute cutting edge. When the thin small thickness portion becomes nicked or dull, the thicker body provides a buffer that prevents complete failure and allows for easier restoration through sharpening rather than requiring complete replacement.
3Ease of manufacture
If the surface from cutting edge to ridge is large in width, then the blade structure is stable, but it is difficult to grind the surface in a parallel manner
Solution Approach 1:
The blade is segmented into a thick main body portion and a thin small thickness portion. This segmentation creates a narrower effective grinding surface on the small thickness portion, making it easier to grind in a parallel manner while maintaining overall structural stability through the thicker body portion.
Data Source
AI summary
Provided is a cutting implement which is easily ground or which needs no grinding and is safe. The cutting implement is a cutting implement including an acting portion 3 that cuts an object to be cut, the cutting implement configured such that the acting portion 3 includes a main body portion 4 and a small thickness portion 5 whose thickness is smaller than the thickness of the main body portion 4 and the small thickness portion 5 has a width of 2.5 to 20 mm and a thickness of 0.1 to 0.5 mm.