Snap-Off Serrated Oscillating Blade for Reduced Material Waste
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Solution Overview
Problem
Oscillating tool blades wear out quickly, leading to waste and material inefficiency, as the entire assembly is discarded when the cutting edge becomes blunt.
Innovation Solution
A blade assembly with a serrated edge and strategically placed cutouts along its length, allowing the worn front section to be snapped off, revealing a new cutting edge, extending the blade's usable life by multiple times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire blade assembly is discarded when the cutting edge becomes blunt, then a new sharp blade is available, but material and cost are wasted
Solution Approach 1:
The blade section is segmented into multiple cutting edges by providing lines of cutouts along its length. Each segment between cutouts contains a cutting edge, allowing individual segments to be separated when worn. This enables reuse of the remaining blade sections instead of discarding the entire blade assembly.
Solution Approach 2:
When a cutting edge becomes worn or blunt, only the specific front segment containing that edge is discarded by snapping it off at the cutouts. The remaining blade section with its other cutting edges is recovered and continues to be used, thereby reducing material waste.
2Duration of action of stationary object
If multiple cutting edges are provided on a single blade section, then blade longevity is extended, but the blade structure becomes more complex
Solution Approach 1:
The blade section is divided into multiple segments by lines of cutouts, with each segment providing a cutting edge. This segmentation approach extends blade usability duration while maintaining a relatively simple structure, as the cutouts are straightforward features that facilitate clean separation of worn segments.
3Loss of substance
If the blade section is made detachable in segments, then waste is reduced, but the manufacturing process becomes more complex
Solution Approach 1:
The lines of cutouts are pre-formed in the blade section during manufacturing, creating predetermined separation lines before the blade is put into service. This preliminary action enables easy segmentation of worn portions later without requiring complex manufacturing processes, as the cutouts are simply formed as part of the initial blade fabrication.
Data Source
AI summary
A blade for an oscillating multi-tool is described. The blade has multiple snap-off sections which can be removed to reveal a new serrated cutting edge. At least one line of cutouts is provided along the width of the blade section, behind a serrated front edge, each cutout defining at least one substantially forward-facing point, and the cutouts are spaced apart along the width of the blade section, a front part of the blade section forward of the cutouts being attached a rear part of the blade section behind the cutouts at least by material in the spaces laterally between the cutouts.