Pilot-Guided Hole Cutter for Aligning Near Full-Sized Holes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Forming fully aligned holes in components with near full-sized holes is challenging due to misalignment issues, leading to perceived looseness of tools when fasteners are inserted, as existing cutters are designed for maximum misalignment and fail to effectively align holes below this threshold.
Innovation Solution
A tool with a cutting member and a pilot member, where the pilot member has a centering section with a larger diameter than the cutting member, allowing for centering and reducing looseness within near full-sized holes, and a taper to align and cut through misaligned holes to create full-sized holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a cutter with a pilot member is used to form full-sized holes through misaligned holes, then full-sized holes can be formed, but perceived looseness occurs when the misalignment is below the maximum designated level
Solution Approach 1:
The pilot member is segmented into multiple sections with different diameters: a first section with a first diameter that corresponds to the maximum misalignment, and a second section with a second diameter that is smaller than the first diameter. This segmentation allows the tool to address different levels of misalignment separately, with the smaller second section reducing perceived looseness when misalignment is below the maximum designated level.
Solution Approach 2:
Different sections of the pilot member have different local qualities (different diameters) to address specific local conditions. The first section with the larger diameter handles maximum misalignment cases, while the second section with the smaller diameter provides precise centering and reduces perceived looseness for smaller misalignments, creating local quality variations along the pilot member's length.
2Adaptability or versatility
If the pilot member diameter is selected to pass through maximum misaligned holes, then the tool can handle maximum misalignment, but perceived looseness increases as misalignment decreases
Solution Approach 1:
The pilot member is divided into segments with different diameters to handle different misalignment scenarios. The first section with the larger first diameter provides adaptability for maximum misalignment, while the second section with the smaller second diameter improves manufacturing precision by reducing perceived looseness when misalignment is below the maximum level.
Solution Approach 2:
The first section of the pilot member with the larger first diameter performs an excessive action by being larger than necessary for small misalignments, but this excessive size is necessary to handle maximum misalignment cases. The second section with the smaller second diameter then performs the precise centering action for smaller misalignments, effectively using partial action for the specific condition.
Data Source
AI summary
Tools and methods for creating a plurality of aligned holes from a plurality of near full-sized holes. The tool includes a cutting member having a first diameter and a pilot member connected to and coaxial with the cutting member. A first section of the pilot member includes a centering member and is positioned between the cutting member and the second section having a second diameter. The centering member may include a cutting surface. The second diameter corresponds to a positional tolerance of misalignment of a plurality of near full-sized holes of the same diameter and a full-size hole diameter. The centering member may have a third diameter between the first and second diameters. The centering member may be tapered. The pilot member may be inserted into a plurality of near-full sized holes and the cutting member may cut through the holes to form a plurality of aligned full sized holes.