Adjustable Doweling Jig with Simultaneous Bore Guide Positioning
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Solution Overview
Problem
Contemporary doweling jigs are limited to predefined hole locations and require refixturing for each workpiece, leading to potential mismatches in dowel holes and undesirable edges in joints, especially in flat surfaces like table tops.
Innovation Solution
An adjustable doweling jig with positionable bore guides relative to a base, allowing simultaneous alignment and drilling of dowel holes on multiple boards using a single control, ensuring accurate and symmetrical hole placement across multiple workpieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If contemporary doweling jigs use fixed bore guide positions, then the device structure is simple, but the adaptability to different workpiece dimensions is limited
Solution Approach 1:
The bore guides are made adjustable relative to the base through a positioning mechanism that allows them to be moved to different locations along the base. This dynamic positioning capability enables the jig to adapt to various workpiece dimensions while maintaining a relatively simple overall structure.
Solution Approach 2:
The base is designed with multiple positioning locations or a continuous positioning scale that allows a single bore guide to serve multiple positions. This universal design enables the same jig to work with different workpiece sizes and configurations without requiring multiple specialized jigs.
2Manufacturing precision
If the jig is removed and remounted for each workpiece, then the setup time is reduced, but the precision of dowel hole alignment between workpieces deteriorates
Solution Approach 1:
The bore guides are pre-positioned or quickly adjustable to predetermined locations on the base. This preliminary positioning capability allows the operator to rapidly set up the jig for different workpieces without time-consuming refixturing, while maintaining precise alignment through the built-in positioning mechanism.
Solution Approach 2:
The positioning mechanism includes reference marks, scales, or indexing features that provide visual feedback to the operator about the bore guide position. This feedback ensures that when the jig is remounted or adjusted, the bore guides are accurately positioned at the correct locations, maintaining dowel hole alignment precision across multiple workpieces.
3Productivity
If multiple bore guides are used simultaneously, then the productivity increases, but the complexity of adjusting and positioning the guides increases
Solution Approach 1:
Multiple bore guides are combined on a single base with a unified positioning system. The base provides a common reference framework that allows all bore guides to be positioned simultaneously using the same positioning mechanism, reducing the overall complexity compared to having separate positioning systems for each guide.
Solution Approach 2:
The bore guides are designed as separate, modular components that can be independently positioned and adjusted on the base. This segmentation allows each guide to be adjusted separately to specific locations while maintaining overall system simplicity through the standardized base interface and positioning mechanism.
Data Source
AI summary
An adjustable doweling jig is provided. The adjustable doweling jig has a pair of bore guide carriers that are symmetrically and simultaneously adjustable relative to a base structure of the doweling jig. The bore guide carriers carry a plurality of bore guides such that dowel holes can be placed using the bore guides at a broad range of locations, limited only by the size of the jig.