Saw Blade Tooth Stamping for Sharp Tips Without Grinding
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Solution Overview
Problem
Current methods for manufacturing saw blades are inefficient, particularly in forming cutting teeth with sharp tips without additional grinding steps, and in optimizing the design to reduce teeth per inch while maintaining cutting efficiency and protecting cutting tips.
Innovation Solution
A method involving two-stage stamping using differently oriented dies to form gullets and cutting teeth, with projections and undercut portions, allowing for efficient manufacturing of saw blades with fewer teeth per inch and eliminating the need for separate sharpening steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional methods are used to form cutting teeth with sharp tips, then additional grinding steps are required, but this increases manufacturing complexity and time
Solution Approach 1:
The die is designed with a preliminary action that pre-forms the cutting tooth tips to their final sharp geometry during the initial stamping operation. The die includes a cutting edge that directly creates the sharp tip shape in the first forming step, eliminating the need for subsequent grinding operations to achieve the desired sharpness.
Solution Approach 2:
The formation of cutting teeth and gullets is merged into a single stamping operation using a specially designed die. The die simultaneously forms both the tooth bodies and the gullets between them in one action, combining multiple manufacturing steps into one integrated process that reduces complexity while maintaining precision.
2Productivity
If more teeth per inch are used, then cutting efficiency may improve, but manufacturing complexity and time increase
Solution Approach 1:
The die is segmented into multiple forming zones that can independently shape individual tooth bodies and gullets. This segmentation allows for the efficient formation of multiple teeth in a single stamping action, enabling higher teeth per inch without proportionally increasing manufacturing complexity, as all teeth are formed simultaneously rather than sequentially.
3Reliability
If cutting tips are protected through design features, then blade performance improves, but manufacturing precision requirements increase
Solution Approach 1:
The die design incorporates asymmetric forming zones that create tooth bodies with different geometries on opposite sides. This asymmetry allows for the formation of protective features such as varying tooth root structures or reinforcement zones that protect the cutting tips, while the asymmetric die design itself simplifies the manufacturing process by eliminating the need for complex symmetric precision forming.
Data Source
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AI summary
A method of manufacturing a saw blade includes providing a saw blade body, forming a plurality of gullets and a first portion of a plurality of tooth bodies in the saw blade body with each gullet positioned between adjacent tooth bodies, and forming a second portion of the plurality of tooth bodies in the saw blade body separate to forming the plurality of gullets and the first portion of the plurality of tooth bodies in the saw blade body.