Parting Tool Corner Teeth Strengthened Geometry
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Solution Overview
Problem
Parting tools used in oscillation drives have a limited service life due to wear and breakage, especially at corner teeth, which are subjected to high loads without adequate protection, leading to premature failure.
Innovation Solution
The toothing portion is designed with strengthened corner teeth through geometric measures such as reduced tooth depth, variable tooth pitch, flatter transition flanks, and broader tooth tips, along with coatings and metal compositions to enhance strength and wear resistance, ensuring uniform loading and reduced risk of breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the corner teeth are designed with standard geometry, then the tool can be manufactured simply, but the corner teeth are subjected to high loads and experience premature breakage
Solution Approach 1:
The patent applies different geometric characteristics to different regions of the toothing. Corner teeth are designed with specific geometric strengthening features (different tooth depth, variable tooth pitch, flatter transition flanks, broader tooth tips) compared to middle teeth, which have uniform standard geometry. This local differentiation strengthens the high-load corner teeth while maintaining manufacturing simplicity for the majority of the toothing.
Solution Approach 2:
The patent changes geometric parameters of the corner teeth including tooth depth, tooth pitch, flank angle, and tip width. These parameter modifications create geometric strengthening that increases the load-bearing capacity of corner teeth without requiring different materials or complex manufacturing processes.
2Duration of action of stationary object
If the corner teeth are strengthened geometrically, then the service life is extended, but the manufacturing process becomes more complex
Solution Approach 1:
The geometric strengthening is applied locally only to corner teeth rather than the entire toothing. This allows standard manufacturing processes to be used for the majority of teeth while applying enhanced geometry only where needed, minimizing the impact on manufacturing complexity.
Solution Approach 2:
The toothing is segmented into distinct regions: corner teeth with strengthened geometry and middle teeth with standard geometry. This segmentation allows differentiated design and manufacturing approaches for different functional zones, extending service life without uniformly complicating the manufacturing process.
3Productivity
If the entire toothing is fully engaged in the workpiece, then cutting efficiency is maximized, but corner teeth are subjected to excessive loads
Solution Approach 1:
The patent strengthens corner teeth locally to handle the excessive loads they experience during full toothing engagement. This allows the tool to maintain high productivity through complete toothing engagement while the strengthened corner teeth withstand the corresponding high forces without premature failure.
Solution Approach 2:
The corner teeth are pre-strengthened geometrically before use to anticipate and withstand the high loads that occur during full engagement. This preliminary strengthening prevents breakage under the extreme conditions of maximum productivity operation.
Data Source
AI summary
A tool for parting, in particular for sawing, includes a carrier blade that has a toothing portion with a finite, geometrically determined toothing, and a receiver for fixing the carrier blade to a tool spindle of a power tool. The tool spindle can be driven in oscillation about its longitudinal axis. The toothing is disposed at a distance from the receiver and is configured to be advanced perpendicularly in relation to the longitudinal axis, such that the toothing is realized in a non-uniform manner along the toothing portion. The toothing portion has a middle region and end regions that adjoin the middle region and that are provided with strengthened corner teeth.