Reversible Gang Saw Blade Teeth for Bidirectional Cutting
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Solution Overview
Problem
Conventional gang saws are limited to cutting in one direction due to their design, requiring an overhang to prevent upward cutting, which restricts feed speed and efficiency.
Innovation Solution
A saw blade with turning teeth that can cut in both up and down directions, featuring a three-layer structure with a pin and legs connected via a web, allowing for self-fixation during operation and smooth cutting surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If saw blades are equipped with single-sided teeth to cut in one direction, then cutting direction control is achieved, but feed speed is restricted and efficiency is reduced
Solution Approach 1:
The saw blade is segmented into multiple independent tooth modules, each with a tenon and two legs that can independently tilt and lock. This segmentation allows each tooth to function autonomously in bidirectional cutting while maintaining overall blade integrity, enabling both upward and downward cutting directions without compromising feed speed.
Solution Approach 2:
The saw teeth are designed with a dynamic tilting mechanism where the legs can pivot around the tenon axis. During operation, the teeth tilt due to gravity or cutting forces and are fixed in position, allowing the blade to adapt to different cutting directions (upward and downward) dynamically rather than being fixed in a single orientation.
2Adaptability or versatility
If saw blades are suspended with an overhang to prevent upward cutting, then cutting direction control is achieved, but device complexity and space requirements increase
Solution Approach 1:
The saw teeth automatically tilt and lock into position during operation due to gravity and cutting forces, without requiring external suspension mechanisms or overhang structures. The teeth themselves provide the directional control function through their self-fixation mechanism, eliminating the need for complex blade suspension systems.
3Device complexity
If saw teeth are made with thin structure to match blade thickness, then blade simplicity is maintained, but cutting surface smoothness deteriorates
Solution Approach 1:
The saw blade exhibits local quality variation where the tooth portion (with tenon and legs) has greater thickness than the blade body. This localized thickening at the tooth region provides the necessary structural integrity and cutting surface smoothness, while the rest of the blade maintains a simpler, thinner structure. The three-layer construction (web + two cover layers) further enhances this local quality improvement.
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
Enables bidirectional cutting without an overhang, increasing feed speed and maintaining a smooth cutting surface through the self-fixation mechanism of the saw teeth during operation.
Implementation Method 1
during sawing operation the saw teeth tilt at a tilting point K due to their gravity or the acting cutting forces and are thereby fixed
Data Source
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AI summary
The invention relates to a saw blade (1) for frame saws, which is equipped with saw teeth (3) designed as reversible teeth, wherein the saw teeth (3) reverse at the top and bottom dead centers of the up and down movement and thus operate in both cutting directions. The saw blade (1) according to the invention has a saw blade body (2) and saw teeth (3), wherein the saw teeth (3), designed as reversible teeth, have a pin (4) and, to the right and left of it, are connected via a web (5) with web segments (5a) and have two legs (6a), and cutting edges (7a) are formed at the ends of the web segments (5a), and pin recesses (8) for receiving the saw teeth (3) for interaction with the pins (4) and leg recesses (9a) for interaction with the legs (5a) are formed in the saw blade body (2).