Saw Blade Tip Grinding for Uniform Kerf Width
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Solution Overview
Problem
Existing saw blades face challenges in achieving precise and uniform kerf width due to mechanical setting, which is costly, imprecise, and adds manufacturing complexity, limiting the control over tooth offset and leading to uneven wear and cut finish.
Innovation Solution
A saw blade design where hard material tips are ground to precise angles and profiles, eliminating the need for mechanical setting by integrating the tips entirely within the blade backer planes and extending laterally to control kerf width, allowing for customized and uniform tip settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If mechanical setting is used to increase blade kerf by offsetting teeth, then kerf width is increased, but manufacturing precision deteriorates due to uncontrolled tooth offset and uneven wear
Solution Approach 1:
The patent applies preliminary action by pre-grinding the tooth tips to precise angles and profiles before the cutting operation. The tips are ground at specific angles (e.g., 5-15 degrees) relative to the blade backer planes, establishing the kerf width in advance through controlled grinding rather than through mechanical deformation during or after manufacturing. This preliminary precision grinding eliminates the need for mechanical setting while achieving the desired kerf width.
Solution Approach 2:
The patent changes the parameters of the tooth tip geometry by grinding the tips at specific angles and profiles. Instead of mechanically deforming the teeth to achieve offset, the invention modifies the tip parameters (angle, profile, extent beyond backer planes) to control kerf width. This parameter change through precision grinding provides controlled, uniform, and precise kerf while avoiding the precision losses associated with mechanical setting.
2Length of stationary object
If mechanical setting is applied to offset teeth, then blade kerf is increased, but device complexity increases due to additional manufacturing process steps
Solution Approach 1:
The patent merges the kerf control function into the tooth tip grinding process itself. Instead of using a separate mechanical setting process to achieve offset, the invention combines the kerf width control directly into the precision grinding operation. The tooth tips are ground at specific angles and profiles that inherently provide the desired kerf width, eliminating the need for additional mechanical setting equipment and process steps.
Solution Approach 2:
The patent extracts the mechanical setting step from the manufacturing process entirely. By using precision grinding to directly create the offset effect through angled tip geometry, the invention removes the complex mechanical setting operation (which requires specialized equipment to apply forces to deform teeth) and replaces it with a more straightforward precision grinding process that achieves the same functional result with simpler methodology.
3Strength
If hard material tips are welded to tooth apices, then cutting performance is improved, but manufacturing cost increases due to material and processing expenses
Solution Approach 1:
The patent applies local quality by incorporating hard material exclusively at the tooth tip regions where cutting action occurs, rather than throughout the entire tooth or blade. The hard material pellets are welded only to the apex portions of the teeth, and then these localized tip regions are precision ground to the required angles and profiles. This localized application of hard material provides enhanced cutting performance at the critical cutting edge while minimizing material costs compared to using hard material throughout the entire tooth structure.
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 a more controlled, precise, and uniform kerf width, enhancing cut finish and even tooth wear, while reducing manufacturing costs and complexity by eliminating the mechanical setting process.
Implementation Method 1
blade manufactures grind the tooth tip. The welded material on the tooth tip typically has a width that is slightly greater than the width of the tooth and blade. The sides of the tip are typically then ground to a tip width that is essentially the same as width or thickness of the tooth and blade backer.
Data Source
AI summary
A saw blade comprises 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. At least one of the teeth is located entirely within planes containing the side surfaces of the blade backer. A tip is formed at an apex end portion of the one tooth. A leading face surface of the tip on the one tooth is disposed at an acute angle relative to a plane extending perpendicular to the planes containing the side surfaces of the blade backer.