Multi-Step Wood Drill Bit for Variable Diameter Holes
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Solution Overview
Problem
Conventional drill bits are limited to drilling a single diameter hole, requiring multiple bits for different diameters, which is inefficient and impractical for drilling through varying thicknesses of wood materials.
Innovation Solution
A wood drill bit with multiple step sections, each having a unique effective diameter and comprising flutes and lands that create progressively larger cutting edges, allowing the bit to drill multiple diameter holes with varying lengths, including through standard wood boards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple drill bits of different diameters are used to drill different diameter holes, then the precision of hole diameter is improved, but the device complexity and number of tools required increases
Solution Approach 1:
The patent combines multiple drill bit functions into a single multi-step drill bit. The drill bit includes multiple step sections (first step section, second step section, third step section) with different effective diameters, allowing one tool to perform the function of multiple separate drill bits. This merging resolves the contradiction by maintaining hole diameter precision across different sizes while reducing the number of tools required.
Solution Approach 2:
The drill bit is designed with universal functionality to drill holes of multiple different diameters. Each step section provides a different effective diameter, making the single drill bit applicable to various hole size requirements. This multi-functionality eliminates the need to switch between multiple specialized drill bits, resolving the contradiction between precision and device complexity.
2Device complexity
If a single drill bit is used to drill different diameter holes, then the device complexity is reduced, but the manufacturing precision of different diameter holes deteriorates
Solution Approach 1:
The drill bit is segmented into multiple distinct step sections, each with a specific effective diameter. The first step section has a first effective diameter, the second step section has a second effective diameter, and the third step section has a third effective diameter. This segmentation allows the single drill bit to maintain precise hole diameter control for different sizes, resolving the contradiction by dividing the cutting function into specialized sections.
Solution Approach 2:
Different step sections of the drill bit have different local qualities in terms of their effective diameters and cutting characteristics. Each step section is optimized for its specific diameter requirement, with appropriate flute configurations and cutting edge geometries. This local quality differentiation ensures manufacturing precision is maintained across different hole diameters while using a single tool.
3Adaptability or versatility
If drill bits with multiple step sections are used, then the versatility for drilling different diameters is improved, but the length of each step section may be insufficient for drilling through thick materials
Solution Approach 1:
The drill bit employs a nested arrangement where multiple step sections are arranged concentrically along the drill bit axis. The first step section, second step section, and third step section are positioned such that each can engage material at different radial distances from the center. This nested configuration maximizes the effective length available for drilling through thick materials while maintaining multiple diameter capabilities, resolving the contradiction between versatility and section length.
Data Source
AI summary
A wood drill bit has a plurality of step sections where each step section has at least one flute that terminates in a cutting edge. The effective diameter of each of the plurality of step sections is different than the diameter of the other of the plurality of step sections such that a single bit may be used to bore holes in wood of different diameters.