Doweling Drill Jig With Symmetrical Stops for Complex Workpieces
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Solution Overview
Problem
Existing drilling jigs for dowelling workpieces, particularly wood-based materials, lack variability and flexibility in hole positioning and diameter, limiting their application to only straight or rectangular shapes and not accommodating complex contours effectively.
Innovation Solution
A drilling jig with a one-piece base body featuring drill bushings and symmetrical grid holes for interchangeable stop bolts of different sizes and diameters, allowing for adjustable distances and drilling diameters, enabling precise positioning and hole creation in various workpiece shapes, including three-dimensionally shaped ones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a drilling jig with fixed drill guide holes is used, then the structure is simple, but the variability and range of possible uses are limited
Solution Approach 1:
The drilling jig is divided into modular components: a base body with grid holes, interchangeable stop bolts with different head areas, and drill guides that can be positioned at various locations. This segmentation allows flexible reconfiguration for different drilling patterns and workpiece types without redesigning the entire jig.
Solution Approach 2:
The base body incorporates a grid pattern of holes that can accommodate multiple functions: positioning stop bolts for various workpiece sizes, locating drill guides for different hole patterns, and providing reference points for alignment. This universal grid system enables one jig to serve multiple drilling applications.
2Adaptability or versatility
If standard stop bolts are used, then the manufacturing is simple, but the distances from locking pins are fixed and variable positioning is limited
Solution Approach 1:
Stop bolts are manufactured with variable head areas (different diameters) while maintaining the same shank dimensions for compatibility with grid holes. By changing only the head area parameter, the positioning distance can be adjusted without complicating the overall manufacturing process or requiring completely different fastener types.
3Adaptability or versatility
If drill guides are fixed in position, then the drilling precision is maintained, but the ability to accommodate complex contours is limited
Solution Approach 1:
The base body is pre-manufactured with an accurate grid pattern of holes at predetermined locations. This preliminary establishment of reference points ensures that when drill guides and stop bolts are assembled onto the jig, they inherit the precise positioning, maintaining drilling accuracy while enabling flexible configuration for complex contours.
Data Source
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AI summary
The invention relates to a drilling jig 1 for arranging and drilling holes for doweling workpieces, particularly wood-based materials. It has drill bushings 2 arranged in a row 2a. These bushings are recessed into a base body 3 and are designed and intended to serve as a drilling guide. It also features gridded bores 6 for receiving stop bolts 7. The stop bolts 7, for insertion into the gridded bores 6 of the drilling jig 1, have a receiving area 7a, which is designed for insertion into a gridded bore 6, and a head area 7b for forming a stop surface. The gridded bores 6 are arranged symmetrically to the drill bushings 2 in the row 2a, and the stop bolts 7 have head areas 7b of different diameters.This makes it possible to create a highly versatile drilling jig 1 that allows for different spacings and, through the possibility of using guide elements in the drill bushings 2, different drilling diameters. This is further enhanced by the symmetrical arrangement of the grid holes 6 around the row 2a of the drill bushings 2.