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 intersecting grooves in two directions, inclined to each other, which creates a unique tooth geometry that enhances cutting performance and manufacturability, allowing for even force distribution and effective chip evacuation, and can be produced using grinding tools with specific orientations and spacings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If conventional tooth shapes are used on hard material saw blades, then lifetime is improved, but feed rate deteriorates
Solution Approach 1:
The patent applies dimensionality change by introducing grooves in two different directions (first direction and second direction) instead of conventional single-direction grooves. This creates a three-dimensional tooth geometry that simultaneously achieves both long lifetime and high feed rate by optimizing chip evacuation and cutting forces through the multi-directional groove configuration.
Solution Approach 2:
The patent changes geometric parameters by varying the groove dimensions, spacing, and orientation angles between the first and second directions. By optimizing these parameters, the tooth shape achieves improved chip evacuation capability for higher feed rates while maintaining the durability of hard material through controlled stress distribution.
2Duration of action of stationary object
If conventional tooth shapes are used on hard material saw blades, then lifetime is improved, but cutting performance on wood and plastics deteriorates
Solution Approach 1:
The patent introduces multi-directional grooves (first direction and second direction) to create enhanced tooth geometry that improves cutting performance on diverse materials like wood and plastics. The additional dimensional complexity enables better chip evacuation and reduced friction, achieving superior cutting performance while maintaining the lifetime benefits of hard material.
Solution Approach 2:
The patent applies local quality by creating varied tooth geometries through the intersection of grooves in different directions. Different regions of the cutting portion have locally optimized tooth shapes that adapt to specific cutting requirements, improving overall cutting performance across different materials while maintaining durability through the hard material body.
3Productivity
If complex tooth geometries are created to improve cutting performance, then feed rate is improved, but manufacturability deteriorates
Solution Approach 1:
The patent segments the complex tooth geometry creation into two separate, simpler groove formation processes: first grooves in a first direction, then grooves in a second direction. This segmentation of the manufacturing process makes the complex geometry achievable through sequential, standardized operations rather than requiring complex single-step tooling.
Solution Approach 2:
The patent applies preliminary action by first creating the grooves in the first direction to establish the basic tooth structure, then adding grooves in the second direction to refine and optimize the tooth geometry. This sequential approach allows each groove set to be manufactured using standard tools while achieving the complex final geometry needed for high feed rate performance.
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
The design achieves improved cutting performance, increased feed rates, and extended service life compared to conventional saw blades, with reduced friction and power consumption, while maintaining cost-effectiveness in manufacturing.
Implementation Method 1
a method to produce a saw blade by grinding a surface of a body of hard material to form a plurality of teeth
Data Source
AI summary
A saw blade contains a body, in particular of a hard material, having a cutting portion. The cutting portion has a length and a width and being provided along its length with a plurality of teeth which are formed by a plurality of grooves. Each tooth being formed by at least two grooves. There is a first plurality of grooves, the grooves of which are parallel to each other along a first direction and in that there is a second plurality of grooves, the grooves of which are parallel to each other in a second direction. The first direction and the second direction are inclined to each other such that along the length of the cutting portion at least one of the grooves of the first plurality of grooves is intersected by a groove of the second plurality of grooves.