Edge-Guided Drill Guide for Precise Hole Placement and Depth
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Solution Overview
Problem
Existing drill guides lack precision and repeatability in drilling holes, particularly when guiding a drill bit manually, and often result in over-drilling or inaccurate hole placement relative to a workpiece edge.
Innovation Solution
A drill guide system with an edge guide attachment featuring a base, mounting arms, a fence, and a ruler for precise alignment, along with a depth stop arrangement that avoids interference with springs, ensuring accurate drilling depth and location relative to a workpiece edge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a drill guide is used to guide the drill bit manually, then ease of operation is improved, but manufacturing precision deteriorates due to user error and lack of repeatability
Solution Approach 1:
The drill guide acts as an intermediary device between the user and the workpiece. It provides a physical guide structure with guides and a slide member that mediate the drilling operation, ensuring the drill bit follows a precise predetermined path while still allowing manual operation. This resolves the contradiction by introducing a mediating structure that maintains ease of manual operation while eliminating user error in hole placement.
Solution Approach 2:
The drill guide establishes predetermined drilling locations and paths before the actual drilling operation. The guide structure is positioned and secured to the workpiece in advance, defining exact hole locations. This preliminary positioning action ensures that subsequent manual drilling operations achieve high precision without requiring the user to manually calculate or measure each hole location during the drilling process.
2Manufacturing precision
If depth stops are provided to prevent over-drilling, then manufacturing precision is improved, but device complexity increases due to additional components
Solution Approach 1:
The depth stop functionality is merged with the existing guide structure. The depth stop arrangement integrates with the guides and slide member rather than being a separate independent mechanism. This combining of functions allows depth control to be achieved without adding significant complexity, as the depth stop works in conjunction with already-present components like the spring mechanism.
Solution Approach 2:
The depth stop arrangement utilizes the existing spring mechanism to automatically provide depth control. The spring applies force to the slide member, and the depth stop arrangement works passively with this spring force to limit drilling depth. This self-service approach allows depth control without requiring additional active components or complex control systems, maintaining simplicity while achieving precise depth control.
3Manufacturing precision
If an edge guide attachment is added for precise alignment with workpiece edges, then manufacturing precision is improved, but device complexity increases due to additional attachment components
Solution Approach 1:
The edge guide attachment is designed as a separate, modular segment that can be independently positioned and secured to the drill guide. The attachment includes discrete components like mounting arms and positioning features that can be adjusted and locked into place. This segmentation allows the edge guide to be added only when needed for edge-aligned drilling, providing precise alignment capability without permanently complicating the basic drill guide structure.
Solution Approach 2:
The edge guide attachment incorporates adjustable and movable features that allow it to adapt to different workpiece edges and drilling requirements. The mounting arms can be positioned at different locations, and the attachment can be secured or removed as needed. This dynamic capability provides precise edge alignment when required while maintaining the simplicity of the basic drill guide for operations where edge alignment is not needed.
Data Source
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AI summary
A drill guide and an edge guide attachment for a drill guide, the drill guide having a base having a bottom defining a bottom plane, the edge guide attachment comprises: a first mounting arm configured to mount to the base; an fence having a workpiece abutment surface extending below the bottom plane when mounted to the drill guide such that the workpiece abutment surface can engage an edge of the workpiece when the base rests on a surface of the work-piece, the fence adjustably positionable along the first mounting arm; a ruler fixably attachable to the base having measuring demarcations thereon for indicating a spacing of the abutment surface from a predetermined location of the drill guide, the fence movable relative to the rule when the ruler is attached to the base.