Ground Saw Blade Tooth Geometry for Precise Kerf Control
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Solution Overview
Problem
Existing saw blades face challenges in achieving precise and uniform kerf width and rake angle, which are difficult to control through mechanical setting, leading to inconsistent cut quality and increased manufacturing costs.
Innovation Solution
A saw blade design where hard material tips are welded and ground to precise angles, eliminating the need for mechanical setting, allowing for controlled and consistent kerf and rake angle customization through a ground setting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mechanical setting is used to increase blade kerf and set rake face angle, then the desired blade characteristics are achieved, but the manufacturing process becomes more complex and costly
Solution Approach 1:
The tooth tips are pre-formed with the correct kerf width and rake face angle during the molding or manufacturing process, eliminating the need for subsequent mechanical setting operations. This preliminary formation of the desired geometry directly resolves the contradiction by achieving precision without added process complexity
Solution Approach 2:
The patent extracts the kerf-setting function from the mechanical setting process and integrates it into the tooth tip design itself. By incorporating the kerf-forming geometry directly into the tooth structure during manufacturing, the separate mechanical setting step is eliminated, reducing overall process complexity while maintaining precision
2Manufacturing precision
If mechanical setting is used to offset teeth from blade backer, then blade kerf is increased, but manufacturing costs and production time increase
Solution Approach 1:
The desired tooth offset and kerf geometry are built into the tooth tips during the initial manufacturing process rather than being added later through mechanical setting. This preliminary formation eliminates additional production steps, directly improving production efficiency while maintaining the required tooth offset precision
Solution Approach 2:
The patent merges the tooth offset function with the tooth tip geometry itself. By combining the kerf-forming offset with the cutting tooth structure in a single manufacturing operation, multiple functions are achieved simultaneously, eliminating the need for separate mechanical setting steps and improving overall productivity
3Manufacturing precision
If mechanical setting is used to reposition teeth, then rake angle is controlled, but the process adds manufacturing steps and lead time
Solution Approach 1:
The rake face angle is pre-established during tooth tip formation in the manufacturing process, eliminating the need for subsequent mechanical setting operations. This preliminary formation of the correct rake geometry directly reduces manufacturing lead time while maintaining precise angle control
Solution Approach 2:
The rake angle-setting function is extracted from the mechanical setting process and integrated into the tooth tip design. By incorporating the rake face geometry directly into the manufacturing process, the separate angle-setting step is eliminated, reducing overall manufacturing time while maintaining precision
4Strength
If hard material pellets are welded to tooth apex, then cutting edge durability is improved, but additional manufacturing steps are required
Solution Approach 1:
The patent merges the hard material reinforcement function with the tooth tip geometry itself. By forming the hard material as an integral part of the tooth tip during manufacturing rather than welding separate pellets, the cutting edge durability is improved while eliminating the additional welding and grinding steps
Solution Approach 2:
The tooth tips are formed using composite material construction that integrates the hard cutting material with the tooth structure in a single manufacturing process. This composite approach provides the durability of hard materials without requiring separate welding operations, reducing overall process complexity
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 approach results in improved cut finish, even tooth wear, and reduced manufacturing costs by eliminating the mechanical setting step, while providing more controlled and precise kerf and rake angles.
Implementation Method 1
a pellet of the selected hard material is first welded to an apex of each blade tooth
Implementation Method 2
The force plastically deforms the tooth so that the tooth tip is transversely or laterally offset relative to the longitudinal extent of the blade backer
Data Source
AI summary
A saw blade includes a blade backer with a pair of side surfaces that extend substantially parallel to each other. An intermediate surface extends between the pair of side surfaces of the blade backer. A plurality of teeth extends from the intermediate surface. The plurality of teeth includes an asymmetrically ground tooth tip having a first rake face angle and a symmetrically ground tooth tip having a different, second rake face angle.