Saw Tooth Setter With Wedge Plates for Two-Tooth Setting
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Solution Overview
Problem
Existing saw blade tooth setters are inefficient and time-consuming, requiring multiple steps and operator fatigue to achieve a uniform set on each tooth, especially due to the elastic properties of the blade material and the need for frequent re-setting.
Innovation Solution
A tooth setter with a single actuator that advances the saw blade and sets the teeth in one action, utilizing mechanical linkages to transmit force efficiently, allowing for forward and backward movement of a carriage and blade feeding arrangement to set two teeth simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing tooth setters set one tooth at a time with multiple steps, then each tooth can be set individually, but the process is time-consuming and causes operator fatigue
Solution Approach 1:
The patent combines multiple tooth setting operations into a single integrated action. The carriage assembly simultaneously sets two teeth at opposite sides of the blade while advancing the blade forward, eliminating the need for separate operations to set teeth on each side and removing the requirement to reverse the blade.
Solution Approach 2:
The device divides the blade into segments (pairs of teeth) and processes each segment simultaneously at both sides. The carriage assembly is configured to set two teeth at a time, effectively segmenting the work into manageable units that can be completed in one operation rather than one tooth at a time.
2Manufacturing precision
If the blade is held in fixed position and each tooth is displaced individually, then precise control of each tooth is achieved, but the elastic properties of the blade material cause inconsistency and require additional displacement beyond the desired final set
Solution Approach 1:
The device applies preliminary displacement to the teeth through the wedge-shaped members that force the teeth outward against the blade's elastic resistance. By pre-displacing the teeth beyond the final desired set position and then allowing elastic recovery, the system achieves the correct final set position consistently.
Solution Approach 2:
The mechanical linkage and wedge system provide inherent feedback through the blade's elastic properties. The blade material itself acts as a spring that resists displacement and then rebounds, automatically compensating for the displacement amount and ensuring consistent set positions across all teeth.
3Ease of operation
If a single actuator is used to both advance the blade and set the teeth, then the number of operators and steps is reduced, but the mechanical linkages required to transmit force efficiently become more complex
Solution Approach 1:
The single actuator is designed to perform multiple functions: it simultaneously advances the blade forward and operates the carriage assembly to set the teeth. This multi-functional design eliminates the need for separate actuators for blade advancement and tooth setting, reducing operator fatigue despite the mechanical complexity.
Solution Approach 2:
The mechanical linkages act as intermediaries that transmit and transform the force from the single actuator into the dual motions required: advancing the blade and positioning the carriage for tooth setting. The linkages convert the actuator's motion into coordinated movements of multiple components.
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
This solution simplifies the saw blade tooth setting process, reducing operator fatigue and time by enabling a consistent and precise set on each tooth with fewer steps, while accommodating the elasticity of the blade material.
Implementation Method 1
a wedge protruding up from the base between the sidewalls in the first end of the channel, the carriage arranged for forward movement and backward movement wherein forward movement is movement in a direction from the first end to the second end and backward movement is movement in a direction from the second end to the first end
Implementation Method 2
The elasticity of the blade material results in each tooth springing back slightly from the full displaced position
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A saw tooth setter (2) has a housing (4) and a carriage (26). A carriage base (28) has a channel (32) which narrows from a first end (34) to a second end (36). A wedge (44) protrudes up from the base (28) in the channel (32). A first mechanical linkage translates movement of an actuator (10) into forward and backward movement of the carriage (26). A second mechanical linkage translates movement of the carriage (26) to forward and backward movement of a blade feeding arrangement. A setting mechanism (64) has a set of opposing plates (66) which extend through and are hingedly attached to a top cover of the housing (4). A first end (72) of each plate (66) is seated in the channel (32). A second end (68) of each plate (66) sets the tooth (9). Upon forward movement of the carriage (26) the first ends (72) of the plates enter the first end of the channel (32) and are separated by the wedge (44), and the second ends (68) of the plates (66) come together to set the teeth (9).