Knife Sharpening Disc Assembly for Consistent Edge Grinding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing grinding and polishing devices for cutting tools require high dexterity from operators to maintain a consistent angle between the cutting edge and the grinding tool, making them difficult to use and imprecise.
Innovation Solution
A device with detachable discs on either side of a cylindrical body, allowing the cutting tool to be positioned on a surface and the device drawn across, ensuring both the device and tool rest on the surface for precise grinding and polishing, with interchangeable discs for different effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operator holds both the cutting tool and grinding tool freely in the air, then the operator can access the cutting edge for grinding, but maintaining a consistent angle between the cutting edge and grinding tool becomes difficult, requiring high dexterity
Solution Approach 1:
The device is divided into two separate components: a stationary grinding tool mounted on a support structure, and a movable device body that holds the cutting tool. This segmentation allows the grinding tool to remain fixed while the device body moves along the cutting edge, eliminating the need for the operator to simultaneously control both tools and maintain precise angles.
Solution Approach 2:
The device body acts as an intermediary between the operator and the cutting tool. It includes a positioning element that engages with a guide structure on the support, mediating the movement and ensuring consistent angular relationship between the cutting edge and grinding tool without requiring operator skill to maintain the angle.
2Manufacturing precision
If the grinding tool is held freely in the air by the operator, then the tool can be applied to the cutting edge, but precise positioning becomes difficult
Solution Approach 1:
Instead of holding the grinding tool in the air and moving it along the cutting edge, the invention inverts the approach by mounting the grinding tool on a stationary support and moving the device body (holding the cutting tool) along the cutting edge. This inversion provides stable positioning while maintaining ease of operation.
Solution Approach 2:
The positioning element on the device body automatically engages with the guide structure on the support, enabling self-positioning and self-alignment. This self-service mechanism ensures precise positioning without requiring operator skill or manual adjustment during the grinding process.
3Adaptability or versatility
If single-purpose discs are used, then the device structure remains simple, but the device cannot be adapted to different cutting tools or grinding needs
Solution Approach 1:
The device incorporates interchangeable discs that can be detached and replaced according to different grinding needs. Each disc can be designed for specific grinding tasks (e.g., different abrasives, shapes, or sizes), allowing a single device to serve multiple functions and adapt to various cutting tools without increasing the overall device structure complexity.
Solution Approach 2:
The disc attachment mechanism allows dynamic reconfiguration of the device by enabling easy replacement of discs during use. This dynamic adaptability permits the device to be adjusted for different cutting tools, materials, or grinding stages without requiring a completely different device, balancing versatility with structural simplicity.
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
Simplifies positioning and improves grinding precision by allowing the device to be adapted to the cutting tool, enabling easy disc replacement and varied grinding/polishing effects.
Implementation Method 1
a first abrasive, in particular comprising ruby, sapphire, diamond, glass, ceramic, corundum or carbide
Data Source
Figure 1
Figure 2
AI summary
Device for grinding and/or polishing a cutting tool, preferably a household knife, comprising: - a device body (2); - an axle (3) rotatably mounted in the device body (2); - a first and a second substantially circular disc (4, 5) connected to the rotatable axle (3) in such a way that when the device body (2) is drawn along a surface, preferably a table surface, the two discs (4, 5) rotate relative to the device body (3), and wherein at least the first disc (4) is designed for grinding and is such that when an edge of the cutting tool is placed against the first disc (4) and the device body (2) is drawn over the surface, preferably manually, the first disc (4) grinds the edge due to the rotation.