Segmented Reciprocating Saw Blade for Chip Removal and Durability
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Solution Overview
Problem
Conventional saw blades face limitations in durability, cutting efficiency, and accuracy due to uniform tooth forms and lack of innovative designs that enhance performance when cutting through materials like metal and wood.
Innovation Solution
The development of a reciprocating saw blade with a body featuring a cutting portion comprising multiple cutting segments separated by slots, each with unique rake and relief angles, and a tang and aperture for secure attachment to a power tool, allowing for enhanced cutting performance and extended blade life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional uniform tooth forms are used on saw blades, then manufacturing is simpler and cost is lower, but cutting efficiency and durability deteriorate when cutting through materials like metal and wood
Solution Approach 1:
The patent applies local quality by varying tooth forms along the length of the saw blade. Different sections of the blade have teeth with different rake angles, relief angles, and tooth profiles optimized for specific cutting tasks. This allows the blade to handle multiple material types and cutting conditions along its length, improving overall cutting efficiency without requiring multiple separate blades.
Solution Approach 2:
The saw blade is divided into multiple sections with different tooth forms. The blade includes a first section with teeth having first rake angles and relief angles, and a second section with teeth having second rake angles and relief angles. This segmentation allows each section to be optimized for specific cutting requirements, enhancing durability and cutting performance across different materials.
2Reliability
If slots are added to separate cutting segments, then chip removal efficiency and durability improve, but manufacturing complexity increases
Solution Approach 1:
The patent incorporates slots that divide the cutting portion into separate cutting segments. These slots allow for independent optimization of each segment's tooth configuration and improve chip evacuation paths. The segmentation also enables better stress distribution along the blade, reducing the risk of cracking and improving overall durability during heavy-duty cutting operations.
Data Source
AI summary
A reciprocating saw blade includes a body including a first end portion, a second end portion opposite the first end portion, and a coupling edge extending between the first and second end portions. The body defines a longitudinal axis extending through the first and second end portions. The reciprocating saw blade also includes an attachment portion coupled to the first end portion of the body and a cutting portion coupled to the coupling edge of the body. The cutting portion includes a plurality of cutting teeth and a plurality of gullets. Moreover, the reciprocating saw blade includes a plurality of slots spaced along the cutting portion to separate the cutting portion into a plurality of cutting segments including a distal end segment adjacent the second end portion of the body. The distal end segment extends beyond the coupling edge of the body in a direction parallel to the longitudinal axis.