Flexible Disc Sharpening Device with Angle Precision Control
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Solution Overview
Problem
Existing blade sharpening devices require operator dexterity and experience to maintain precise angles, leading to long sharpening times and significant angle precision errors, making them inefficient and imprecise.
Innovation Solution
A device featuring two flexible discs with abrasive inner faces rotating in the same direction, aligned pressing means such as carrier balls or magnets, and internal bearing means that define the sharpening angle, allowing simultaneous sharpening of both blade faces with improved precision and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bilateral abrasion systems with two abrasive strips or round stones are used, then simultaneous sharpening of both blade faces is achieved, but operator agility and experience are required to obtain adequate blade angle
Solution Approach 1:
The blade guide system automatically positions and holds the blade at the correct angle between the two abrasive discs, eliminating the need for operator skill to maintain proper blade orientation during sharpening
Solution Approach 2:
The blade guide acts as an intermediary element that mediates between the operator and the abrasive discs, providing automated angle control and reducing the skill requirement for achieving precise sharpening angles
2Ease of operation
If blade guide systems are used to wedge and hold the blade, then ease of operation is improved, but sharpening duration remains long at 1 to 3 minutes
Solution Approach 1:
The two abrasive discs are merged into a single integrated sharpening unit with synchronized rotation, allowing both blade faces to be sharpened simultaneously in one operation rather than requiring separate sharpening passes
Solution Approach 2:
The continuous rotation of both abrasive discs simultaneously sharpens both blade faces without interruption, eliminating the need to stop and reposition the blade between sharpening each face
3Ease of manufacture
If existing sharpening machines are used, then sharpening operation can be performed, but angle precision has error risk between 10 and 25%
Solution Approach 1:
The blade guide system creates an equipotential positioning mechanism where the blade is automatically held at the precise center angle between the two abrasive discs, eliminating angle variation and achieving consistent precision
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 significantly reduces sharpening time to 15-20 seconds, achieves angle precision within 0.1-0.2%, and maintains superior cutting quality and longevity, making it easier to use and more effective than prior art devices.
Implementation Method 1
at least two flexible discs (3, 31) each having an abrasive inner face (3a, 3a1)
Implementation Method 2
the operator alternately applies one of the two faces of the blade to be sharpened against the abrasive strip or the round stone
Implementation Method 3
the pressing means consist of an alignment of carrier balls
Implementation Method 4
said pressing means consist of two magnets of opposite polarities positioned opposite one another
Data Source
AI summary
A sharpening device for a blade of a cutting tool, such as a knife or the like, includes at least two flexible discs. Each disc has an abrasive inner face. The discs, abutting with their abrasive faces, face each other and are mounted so as to rotate in the same direction and at the same speed about a same axis. The device includes a pressure mechanism, arranged outside the flexible discs and clamping the discs along a non-diametrical chord, and an inner pressure mechanism for the inside of the discs, so as to exert pressure on the inner faces of the discs, in the parts of same delimited by the chord and not traversed by the axis. The choice of positioning of the inner pressure mechanism relative to the pressure mechanism defines the sharpening angle.