Blade Grinding Jig With Split Clamps for Bevel Angle Consistency
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Solution Overview
Problem
Conventional grinding jigs for blade tools fail to maintain blade centering during grinding, leading to uneven edge bevel angles and convex edges, which reduce the strength of the blade.
Innovation Solution
A grinding jig with elongate support portions and spaced abutment surfaces that allow controlled movement along a support bar, ensuring consistent blade positioning and angle maintenance, and optionally comprising two separate halves for secure clamping and balanced support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the blade tool is clamped in a conventional grinding jig, then the blade tool can be held for grinding, but the blade tool is not centered in the grinding jig causing angle deviation between edge bevels
Solution Approach 1:
The grinding jig is divided into two separate clamp halves that can be independently positioned and adjusted. Each clamp half can be separately mounted on the support bar, allowing independent adjustment to achieve precise centering of the blade tool between the clamps, thereby ensuring consistent edge bevel angles.
Solution Approach 2:
The support portion of each clamp half is designed with specific geometric features (such as angled surfaces or positioning elements) that locally provide the necessary alignment and centering function. This localized geometric design ensures that when the clamps are mounted on the support bar, they automatically position the blade tool at the correct center point for accurate grinding.
2Adaptability or versatility
If the grinding jig is turned over to grind the second edge bevel, then both sides of the blade can be sharpened, but the angle between the blade and grinding stone changes due to lack of centering
Solution Approach 1:
By separating the clamp into two independently adjustable halves mounted on the support bar, the system allows the blade to be precisely centered before grinding. This centering ensures that when the jig is flipped to grind the opposite edge, the blade maintains the correct angular relationship with the grinding stone, achieving consistent bevel angles on both sides.
Solution Approach 2:
The clamp halves are designed with asymmetric mounting features or adjustment mechanisms that allow different positioning configurations. This asymmetry enables precise adaptation to the blade's specific geometry and thickness, ensuring optimal centering and angle consistency regardless of which edge is being ground.
3Productivity
If a conventional grinding jig is used, then grinding operations can be performed, but convex edges are produced reducing blade edge strength
Solution Approach 1:
The clamp halves are designed with movable or adjustable components that allow dynamic adaptation during the grinding process. The clamps can be positioned to apply uniform pressure across the blade thickness, and the support bar arrangement allows for controlled movement that maintains optimal contact between the blade and grinding stone, producing a convex edge profile that enhances strength.
Solution Approach 2:
The geometric parameters of the clamp halves (such as contact surface angles, positioning distances, or mounting orientations) are specifically designed to control the grinding geometry. By optimizing these parameters, the system produces a convex edge profile with the desired radius of curvature, which significantly improves blade edge strength while maintaining grinding efficiency.
Data Source
AI summary
A grinding jig for holding a blade tool having an edge in a grinding machine. The grinding jig may have a first and a second clamp half arranged to hold between them at least a portion of a blade tool. An elongate support portion may support the grinding jig onto a support bar of a grinding machine. The elongate support portion may comprise a front end abutment surface and a rear end abutment surface. The front and rear end abutment surfaces may be spaced to receive a portion of a support bar such that the grinding jig may be moved back and forth relative to the support bar in a direction parallel with its longitudinal center axis.