Deburring Tool Tapered Shank Reduces Bending
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Solution Overview
Problem
Deburring tools often bend when attempting to debur edges of holes extending through a workpiece, especially when accessing distal edges from the opposite side or simultaneously deburring both edges, which interferes with the deburring process.
Innovation Solution
A deburring tool with a working portion featuring a tapered intermediate section and deburring cutter members on one end, allowing the tool to be rotated and pivoted around a fulcrum defined by the first end portion and the workpiece surface, minimizing bending and enabling effective deburring of both distal and proximal edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a deburring tool with enlarged ends and intermediate member is used to debur distal hole edges, then the deburring capability is improved, but the tool bends under operational forces
Solution Approach 1:
The working portion is divided into three distinct segments: first end portion, intermediate portion, and second end portion. Each segment serves a specific function - the first end portion contacts the workpiece surface to provide stability, the intermediate portion provides structural transition, and the second end portion contains deburring cutters for edge removal. This segmentation allows the tool to maintain structural integrity while achieving deburring functionality.
Solution Approach 2:
Different portions of the working portion have different diameters and functions optimized for their specific roles. The first end portion has a diameter that contacts the workpiece surface, the intermediate portion tapers between the two end portions, and the second end portion has deburring cutters positioned at its end. This local differentiation of properties allows the tool to simultaneously achieve stability and deburring effectiveness.
2Adaptability or versatility
If the deburring tool is moved in a circular path around the hole, then both distal and proximal edges can be deburred, but tool bending interferes with the deburring process
Solution Approach 1:
The tool design adds a spatial dimension to the deburring operation by positioning deburring cutters at the end of the second end portion, which extends beyond the intermediate portion. This three-dimensional arrangement allows the cutters to reach the distal hole edge while the first end portion remains in contact with the workpiece surface, creating a fulcrum that stabilizes the tool during circular motion.
3Ease of operation
If the intermediate portion has a smaller diameter, then the tool can access distal edges more easily, but the tool becomes more flexible and bends under force
Solution Approach 1:
The intermediate portion is designed with a tapered profile, where the diameter varies along its length. This gradual change in the diameter parameter allows the tool to navigate tight spaces and access distal edges while maintaining sufficient rigidity through the larger diameter sections. The tapered geometry provides a compromise between flexibility for access and strength for maintaining precision.
Data Source
AI summary
A deburring tool includes a shank attached at a first end to a chuck and a working portion at a second end of the shank. The working portion includes a first end portion closest to and joining the second end of the shank at a first end of the first end portion, a second end portion furthest from the shank, and an intermediate portion disposed between the first end portion and the second end portion, a first end of the intermediate portion joining a second end of the first end portion and a second end of the intermediate portion joining a first end of the second end portion. The intermediate portion tapers continuously from a largest diameter at the first end of the intermediate portion to a smallest diameter at the second end of the intermediate portion, and deburring cutter members provided on the second end portion adjacent the second end of the intermediate portion.