Precision Grinding Jig Structure for Consistent Blade Bevel Angles
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Solution Overview
Problem
Existing grinding jigs for blade tools fail to maintain a consistent grinding angle across both sides of the blade, especially as blade thickness increases, leading to deviations in edge bevel angles.
Innovation Solution
A grinding jig design featuring a first and second clamp portion that are movable to clamp the blade, with an elongate support portion having fixed first and second support legs at the radial abutment surface, ensuring a constant distance and thus maintaining a consistent grinding angle regardless of blade thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the blade is not centered in the grinding jig, then the structure is simpler, but the grinding angle changes when the jig is turned over, causing deviation in edge bevel angles
Solution Approach 1:
The support portion is designed with an asymmetric structure where the first and second support legs are fixed to one another at the radial abutment surface, creating a constant distance relationship that maintains the blade centered position regardless of blade thickness. This asymmetric fixation resolves the contradiction by ensuring grinding angle consistency without requiring complex adjustable mechanisms.
2Manufacturing precision
If the distance from support portions to blade center depends on blade thickness, then the jig can accommodate different thicknesses, but the grinding angle varies with blade thickness
Solution Approach 1:
The radial abutment surface serves multiple functions: it provides a constant distance reference for both support legs simultaneously, accommodates various blade thicknesses, and maintains consistent grinding angles. This universal reference surface resolves the contradiction by making the support structure adaptable to different blade thicknesses while preserving grinding angle consistency through the fixed relationship at the abutment surface.
Data Source
AI summary
This disclosure generally relates to a grinding jig (1) for holding a blade (100) of a tool in a grinding machine (200), the grinding machine (200) comprising a grinding means (210) and a support means (220). The grinding jig (1) comprises a first and a second clamp portion (10, 20) that are movable with respect to one another to clamp the blade (100), and an elongate support portion (2) for supporting the grinding jig (1) onto the support means (220). The elongate support portion (2) comprises a first support leg (2a) carrying the first clamp portion (10) and a second support leg (2b) carrying the second clamp portion (20). The elongate support portion (2) extends along a longitudinal center axis Y of the grinding jig (1) and comprises a radial abutment surface (3) for abutment against the support means (220). The first and second support legs (2a, 2b) of the support portion (2) are fixed to one another at the radial abutment surface (3).