Reverse Sharpening Guide for Cutting Tools

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Solution Overview

Problem

Existing sharpening systems for cutting tools often damage abrasive surfaces and reduce sharpening efficiency due to the pushing motion, which can lead to compression and deformation of the abrasive material, and may not effectively manage the removal of material from the cutting edge.

Innovation Solution

A reverse sharpening guide system that orients the cutting tool at an acute angle, allowing it to be pulled across an abrasive surface in a trailing cutting edge orientation, reducing the risk of damaging the abrasive surface and enhancing sharpening efficiency by drawing away material from the cutting edge.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a pushing motion is used to sharpen the cutting tool against the abrasive surface, then the sharpening operation can be performed, but the abrasive surface is damaged, compressed, and deformed, reducing sharpening efficiency

Engineering Contradiction:

Improvesharpening efficiencyVSAvoidabrasive surface integrity

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent inverts the conventional sharpening motion by using a pulling motion instead of a pushing motion. The cutting tool is pulled across the abrasive surface in a trailing cutting edge orientation, which prevents compression and deformation of the abrasive material while maintaining effective material removal from the cutting edge.

Inventive Principle:

Principle #13The other way round (Inversion)

2Manufacturing precision

If the cutting tool is pushed against the abrasive surface, then sharpening can occur, but material removal from the cutting edge is not effective

Engineering Contradiction:

Improvecutting edge sharpnessVSAvoidsharpening efficiency

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

By inverting the motion direction to a pulling motion with trailing cutting edge orientation, the patent achieves both effective material removal and maintained abrasive surface integrity, resolving the contradiction between sharpening quality and efficiency.

Inventive Principle:

Principle #13The other way round (Inversion)

3Adaptability or versatility

If deformable abrasive media is used, then flexibility is improved, but the abrasive surface becomes difficult to control for straight bevel angles

Engineering Contradiction:

Improveabrasive media flexibilityVSAvoidbevel angle control

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The pulling motion with trailing cutting edge orientation works advantageously with deformable abrasive media, allowing the media to conform to the cutting edge while the motion direction prevents excessive deformation that would compromise bevel angle control.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent changes the motion parameters from pushing to pulling, which alters how the deformable abrasive media interacts with the cutting tool, enabling both flexibility and precision in bevel angle control.

Inventive Principle:

Principle #35Parameter changes

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

This approach minimizes the risk of cutting or deforming the abrasive surface, improves sharpening efficiency, and allows for accurate control of bevel angles, even with deformable abrasive media, while maintaining a straight surface.

Implementation Method 1

The cutting edge of the tool disengages the non-abrasive support surface and moves along the abrasive surface from the first end toward the second end for sharpening thereagainst

Methodology Applied

Scientific EffectAbrasion: Abrasion

Data Source

PatentUS9623533B2Sharpening a cutting edge of a tool using a reverse sharpening guide

Publication Date: 2017.04.18 DAREX LLC

AI summary

Apparatus and method for sharpening a tool. In accordance with some embodiments, a selected side surface of the tool is placed in contacting engagement against an upper reverse sharpening guide surface that faces an abrasive surface extending along a first plane. The upper reverse sharpening guide surface is aligned along a second plane that intersects the first plane at an acute angle. A tool cutting edge contactingly engages a non-abrasive support surface disposed between the upper reverse sharpening guide surface and the abrasive surface to establish a plunge depth of the tool prior to contact with the abrasive surface. The tool is thereafter moved away from the upper reverse sharpening guide in a lateral direction across the abrasive surface while nominally maintaining the tool at the acute angle to sharpen the cutting edge in a trailing cutting edge orientation.