Saw Blade Indexing Assembly Rotational Feed Finger
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Solution Overview
Problem
Conventional indexing mechanisms for circular saw blades often result in inconsistent tooth positioning and overgrinding due to slippage of the feed finger along the tooth profile, especially when dealing with irregularly spaced teeth or misalignment with cam assemblies.
Innovation Solution
A circular saw blade indexing assembly that rotates about the center of the saw blade, maintaining a consistent feed finger position relative to each tooth, using a mounting assembly with a shaft and an indexing mechanism that adjusts to accommodate varying blade radii and diameters, ensuring precise and consistent tooth profiling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a linear actuator is used to index the saw blade, then the indexing mechanism can advance the blade, but the feed finger slips along the tooth profile causing inconsistent positioning
Solution Approach 1:
Instead of having the feed finger move linearly along the tooth profile (conventional approach), the invention inverts the approach by rotating the entire indexing mechanism about the blade center, allowing the feed finger to maintain a constant radial position while the blade rotates into position. This eliminates slippage and ensures consistent tooth positioning.
2Productivity
If a cam assembly is used to drive the indexing mechanism, then the blade can be advanced, but offset alignment causes the feed finger to slide along the face profile
Solution Approach 1:
Rather than having the feed finger follow the cam arc with potential offset misalignment, the invention rotates the indexing mechanism about the blade center, inverting the conventional approach. This ensures the feed finger remains at a constant radial distance from the blade center, eliminating sliding along the tooth face and ensuring precise positioning regardless of cam alignment.
Solution Approach 2:
The indexing mechanism is designed to accommodate both regularly and irregularly spaced teeth through its rotational architecture about the blade center, making it universally applicable to different blade types while maintaining precise positioning, unlike cam-based systems that require precise alignment for each specific blade configuration.
3Manufacturing precision
If the indexing mechanism rotates the saw blade multiple times past the grinder, then the blade achieves the desired sharpness, but inconsistent velocity leads to overgrinding
Solution Approach 1:
The indexing mechanism incorporates a feedback system where the rotational position is precisely controlled about the blade center, ensuring consistent velocity throughout the multiple rotations past the grinder. This feedback control prevents overgrinding by maintaining accurate positioning, unlike conventional systems where velocity inconsistencies cause variable material removal.
Data Source
AI summary
A circular saw blade indexing assembly includes a frame and a circular saw blade mounting assembly coupled to the frame. The circular saw blade mounting assembly includes a shaft configured to support a circular saw blade and that extends along a longitudinal axis defined by the circular saw blade mounting assembly. The circular saw blade indexing assembly includes an indexing mechanism rotatably coupled to the circular saw blade mounting assembly and having a feed finger disposed at a radial distance from the longitudinal axis. The indexing mechanism is configured to rotate about the longitudinal axis between a first arc position and a second arc position to rotate a saw blade between the first arc position and the second arc position.