Hole Saw Slot And Aperture Layout for Plug Core Ejection
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Solution Overview
Problem
Hole saws often trap the plug core within the cylindrical body, requiring manual removal by the user, which is inefficient and inconvenient.
Innovation Solution
The design incorporates a cylindrical body with axially extending side walls featuring multiple slots and apertures, including a first slot portion, a second slot portion, and connecting slot portions, allowing for the use of tools to remove the plug core without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cylindrical body is designed with a solid structure to maintain strength and rigidity, then the structural integrity is improved, but the plug core becomes trapped and requires manual removal
Solution Approach 1:
The cylindrical body is segmented with multiple slots (first slot portion, second slot portion, and connecting slot portion) that divide the solid structure into sections. These slots allow a removal tool to access and extract the plug core while maintaining the overall structural integrity of the hole saw during cutting operations.
2Ease of operation
If the cylindrical body includes slots and apertures for tool access, then plug removal is facilitated, but the structural strength and rigidity are reduced
Solution Approach 1:
The slots are strategically positioned in specific locations on the cylindrical body (first slot portion, second slot portion, and connecting slot portion) rather than uniformly distributed. This localized approach provides necessary tool access for plug removal while minimizing the impact on overall structural strength and rigidity in critical areas.
Data Source
AI summary
A hole saw includes a substantially cylindrical body defining a cutting end and an axis of rotation. The hole saw also includes first and second apertures formed through the body and spaced from the cutting end such that a portion of the body extends between the cutting end and both the first and second apertures. The first and second apertures are both configured to receive a tool for removing work piece plugs from within the cylindrical body. The first aperture is axially spaced from the cutting end a first distance. The second aperture is axially spaced from the cutting end a second distance that is greater than the first distance. The first aperture and the second aperture are separated by a portion of the body.