Serrated Blade Sharpening Apparatus with Coordinated Oscillating and Linear Actuation
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Solution Overview
Problem
Serrated blades are difficult to sharpen while maintaining the shape of their teeth or serrations, leading to early discarding and replacement, as existing methods lack precision and consistency.
Innovation Solution
A blade sharpening apparatus with a clamping device to securely hold serrated blades, a rotating grinding wheel with a shaped edge, and coordinated oscillating and linear movement mechanisms to match the depth and spacing of the serrations, ensuring consistent sharpening without distorting the blade.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual sharpening methods are used on serrated blades, then the blade can be sharpened, but the shape of the teeth or serrations cannot be preserved and consistency along the blade length cannot be achieved
Solution Approach 1:
The patent uses a template or guide that replicates the original tooth geometry of the serrated blade. This template is placed against the blade during sharpening, and the grinding wheel follows the template's contour, thereby copying the precise tooth shape and ensuring consistency across all serrations without requiring manual skill to reproduce the geometry.
Solution Approach 2:
The patent introduces a template or guide as an intermediary element between the grinding wheel and the blade. This intermediary carries the precise tooth geometry information and transfers it to the blade during the sharpening process, enabling accurate shape reproduction while isolating the operator from the complexity of manually maintaining tooth geometry.
2Productivity
If manual sharpening is attempted on serrated blades, then sharpening can be performed, but the process is difficult and time-consuming
Solution Approach 1:
The patent designs the sharpening apparatus so that the template or guide automatically positions and maintains the correct grinding angle and path. The system essentially sharpens itself by following the pre-programmed or pre-formed geometry of the template, reducing the need for operator skill and intervention while increasing productivity.
Solution Approach 2:
The patent prepares a template with the exact tooth geometry beforehand. This preliminary action of creating the template removes the complexity from the actual sharpening operation, allowing the process to proceed quickly and easily by simply following the pre-prepared guide rather than requiring the operator to manually figure out and maintain precise angles and shapes.
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 apparatus effectively prolongs the life of serrated blades by sharpening them precisely and consistently, reducing the need for frequent replacements and enhancing economic efficiency.
Implementation Method 1
A grinding wheel is provided that rotates and has a grinding edge that is shaped to engage the teeth or serrations spaced along the toothed edge of the serrated blade
Implementation Method 2
An oscillating mechanism provides lateral oscillation between the blade holder and the grinding wheel at an oscillating distance that is selected to correlate with the depth between the teeth or serrations on the serrated blade
Implementation Method 3
A linear actuator provides longitudinal movement between the blade holder and the grinding wheel that is substantially parallel with the rotational axis of the grinding wheel
Data Source
AI summary
A blade sharpening apparatus for sharpening a serrated blade includes a blade holder configured to securely hold a serrated blade in a position that exposes a toothed edge of the serrated blade. A grinding wheel rotates about a rotational axis and engages teeth spaced along the toothed edge of the serrated blade that is secured in the blade holder. An oscillating mechanism laterally oscillates the blade holder or the grinding wheel relative to the other at an oscillating distance greater than a depth between the teeth on the serrated blade. A linear actuator longitudinally moves the blade holder or the grinding wheel relative to the other and substantially parallel with the rotational axis of the grinding wheel. The linear actuator is operable with the oscillating mechanism to coincide the longitudinal and lateral movement to correspond to the depth and spacing of the teeth disposed along the serrated blade.