Knife Grinding Machine with Rounded Recess for Continuous Edge
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional knives, especially those used for slaughtering and cutting, pose a higher risk of injury due to their pointed tips and are less effective in cutting tasks due to uneven edge profiles.
Innovation Solution
A method and device for sharpening knives using a grinding machine with a rotating grinding wheel featuring a rounded indentation, allowing for the creation of a rounded blade tip with a continuous cutting edge, reducing the risk of injury and enhancing cutting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a pointed blade tip is used, then cutting performance is improved, but injury risk increases
Solution Approach 1:
The blade tip is designed with a rounded geometry instead of a sharp point, creating a continuous cutting edge that maintains cutting effectiveness while eliminating the hazardous pointed structure. The rounding process transforms the geometric form from acute to curved, achieving both safety and functionality.
2Object-affected harmful factors
If a rounded blade tip is created, then injury risk is reduced, but cutting performance may deteriorate
Solution Approach 1:
The rounding is applied specifically to the tip region while maintaining the sharp cutting edge geometry along the rest of the blade. This localized modification ensures that the rounded tip provides safety without compromising the cutting performance of the main blade edge.
Solution Approach 2:
The curvature radius of the blade tip is optimized to a specific range (1-4 mm) to balance safety and cutting performance. By controlling the geometric parameter of tip radius, the design achieves reduced injury risk while preserving adequate cutting effectiveness.
3Ease of manufacture
If conventional grinding methods are used, then manufacturing simplicity is maintained, but edge continuity at the blade tip is poor
Solution Approach 1:
A rounded indentation is created in the grinding wheel surface to match the desired rounded blade tip geometry. This curved grinding surface naturally produces a continuous cutting edge at the rounded tip, eliminating the discontinuities that occur with conventional flat or angled grinding methods.
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 produces knives with rounded blade tips and continuous cutting edges, reducing injury risk and improving cutting performance, particularly suited for butcher's knives with enhanced edge retention and usability.
Implementation Method 1
a method for grinding a knife blade with a rotating grinding wheel
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
The grinding machine (2) for grinding a blade (1a) of a knife (1) comprises a grinding wheel (3) rotatable about a rotary axis (D) with a grinding surface (3a) arranged at the front and/or side and extending in the circumferential direction (U), wherein the grinding surface (3a) has a rounded recess (3b) extending in the circumferential direction (U), and comprises a knife guide (9) having a knife guide means (9b, 9d, 9e), wherein the knife guide means (9b, 9d, 9e) is designed and arranged such that a blade tip (1c) of the blade (1a) contacts the grinding surface (3a) substantially at a grinding angle (β) and the blade tip (1c) comes to lie in the rounded recess (3b) of the grinding surface (3a) in order to grind a rounded blade tip (1c) with a continuous cutting edge (1b) To generate a grinding angle (β).