Saw Tooth Setter Wedge Linkage for Faster Precise Tooth Setting
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Solution Overview
Problem
Existing saw blade tooth setters are inefficient and time-consuming, requiring multiple steps and manual effort to achieve a consistent and precise set on each tooth, especially due to the elastic properties of the blade material, and often necessitate reversing the blade for opposing teeth.
Innovation Solution
A tooth setter with a single actuator that uses mechanical linkages to advance and set the saw blade teeth in one action, featuring a carriage with a wedge mechanism and opposing plates that allow for simultaneous forward and backward movement, enabling the setting of two teeth at a time with a single operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If existing tooth setters set one tooth at a time with multiple steps, then each tooth can be precisely set, but the process is time-consuming and causes operator fatigue
Solution Approach 1:
The patent combines multiple tooth-setting operations into a single integrated mechanism. The carriage assembly simultaneously sets multiple teeth (e.g., four teeth) in one forward movement, eliminating the need for separate operations for each tooth. This merging of operations directly reduces the time required while maintaining precision through the unified mechanical design.
Solution Approach 2:
The tooth setter employs preliminary positioning mechanisms that pre-align the carriage and setting fingers before the actual tooth-setting action. The carriage is pre-positioned to engage multiple teeth simultaneously, and the setting fingers are pre-adjusted to the correct displacement distance. This preliminary preparation enables rapid multi-tooth setting without sacrificing precision.
2Productivity
If a single actuator is used to advance and set teeth in one action, then operator fatigue is reduced and process time is shortened, but the mechanism complexity increases
Solution Approach 1:
The single actuator is designed as a multi-functional component that simultaneously performs multiple functions: advancing the carriage, positioning the setting fingers, and actuating the tooth-setting mechanism. This universal actuator eliminates the need for separate actuators for each function, reducing overall system complexity while maintaining high productivity.
Solution Approach 2:
The mechanism employs dynamic linkages and movable components that automatically adjust during operation. The carriage and setting fingers move in coordinated sequences through mechanical linkages, allowing the single actuator to control multiple degrees of freedom. This dynamic design enables complex multi-tooth setting operations from a single actuation point.
3Manufacturing precision
If the blade is held in fixed position and each tooth is displaced individually, then precise control is achieved, but the elastic properties of the blade cause inconsistency
Solution Approach 1:
The setting fingers are designed to displace teeth by slightly more than the final desired set amount during the setting operation. This excessive action compensates for the elastic rebound of the blade material, ensuring that after the tooth springs back, it achieves the precise target displacement. This approach maintains consistency despite the blade's elastic properties.
Solution Approach 2:
The carriage mechanism maintains continuous contact with multiple teeth simultaneously during the setting operation, applying force across all targeted teeth in a single continuous motion. This continuous action prevents the blade from rebounding between individual tooth settings, ensuring consistent displacement across all teeth while simplifying the operation to one smooth movement.
4Productivity
If mechanical advantage is provided to accelerate the process, then fewer steps are needed, but the device complexity increases
Solution Approach 1:
The mechanism incorporates curved guide paths and arc-shaped linkages that provide mechanical advantage through geometric design. The carriage moves along curved trajectories that amplify the actuator's motion, converting small actuator displacements into larger carriage movements that set multiple teeth efficiently. This geometric approach provides mechanical advantage without adding complex active components.
Solution Approach 2:
The mechanism utilizes multi-dimensional motion paths where the carriage moves through combined linear and rotational dimensions. This dimensional complexity allows a single actuator to control multiple degrees of freedom, providing mechanical advantage through spatial arrangement rather than through additional mechanical 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 significantly reduces operator fatigue and shortens the process by allowing for a uniform and precise set of saw blade teeth with fewer steps, enhancing efficiency and consistency while accommodating the elastic properties of the blade material.
Implementation Method 1
a wedge protruding up from the base between the sidewalls in the first end of the channel
Implementation Method 2
The elasticity of the blade material results in each tooth springing back slightly from the full displaced position
Data Source
AI summary
A saw tooth setter has a carriage within a housing. A carriage base has a channel which narrows from a first end to a second end. A wedge protrudes up from the base in the channel. Mechanical linkage translates movement of an actuator into forward and backward movement of the carriage. A second mechanical linkage translates movement of the carriage to forward and backward movement of a blade feeding arrangement. A setting mechanism has a set of opposing plates which extend through and are hingedly attached to the top cover. The first end of each plate is seated in the channel. The second end of each plate has sets the tooth. Upon forward movement of the carriage the first end of the plates enter the first end of the channel and are separated by the wedge, and the second end of the plates come together to set the teeth.