Intersecting-Groove Saw Blade Teeth for Higher Feed Rates
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Solution Overview
Problem
Conventional saw blades with hard material cutting portions have limited tooth shapes, resulting in low feed rates and poor cutting performance when cutting materials like wood or plastics, despite adequate performance with steel.
Innovation Solution
A saw blade design featuring a unique tooth geometry created by intersecting grooves in two directions, which improves cutting performance and manufacturability, with the grooves' arrangement allowing for even force distribution and effective chip evacuation, and can be produced through grinding or other methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional tooth shapes are used on hard material saw blades, then service life is adequate for cutting steel, but feed rate and cutting performance deteriorate when cutting wood or plastics
Solution Approach 1:
The patent applies different groove orientations at different locations on the cutting portion. The first plurality of grooves runs in a first direction while the second plurality of grooves runs in a second direction that is inclined relative to the first direction. This creates zones with different tooth geometries along the cutting portion, allowing optimization for different cutting materials and modes, thereby improving both feed rate and adaptability across different materials.
Solution Approach 2:
The patent introduces a second directional component to the groove arrangement by inclining the second plurality of grooves at an angle to the first plurality of grooves. This transforms the conventional single-direction groove pattern into a two-dimensional intersecting groove system, creating complex tooth geometries that enhance cutting performance across multiple material types while maintaining high feed rates.
2Ease of operation
If the cutting portion width is reduced to improve maneuverability, then ease of operation improves, but the number of teeth and cutting performance deteriorate
Solution Approach 1:
The patent compensates for reduced cutting portion width by introducing intersecting grooves in two different directions. This creates additional tooth variations and cutting edges within the limited width space, effectively increasing the cutting capability without requiring a wider blade, thus maintaining both maneuverability and cutting performance.
Solution Approach 2:
The intersecting groove patterns divide the cutting portion into multiple functional zones with different tooth orientations and geometries. This segmentation allows each zone to contribute to cutting performance, maximizing the utilization of the available width and maintaining high productivity even in narrow blade designs.
Data Source
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AI summary
Saw blade (1) comprising a body (2), in particular of a hard material, having a cutting portion (3), the cutting portion (3) having a length (L) and a width (W) and being provided along its length (L) with a plurality of teeth which are formed by a plurality of grooves (4, 5) each tooth being formed by at least two grooves (4, 5), characterized in that there is a first plurality of grooves (4), the grooves (4) of which are parallel to each other along a first direction (d1) and in that there is a second plurality of grooves (5), the grooves (5) of which are parallel to each other in a second direction (d2) and in that the first direction (d1) and the second direction (d2) are inclined to each other such that along the length (L) of the cutting portion (3) at least one of the grooves (4) of the first plurality of grooves (4) is intersected by a groove (5) of the second plurality of grooves (5).