Rotatable Cutting Tool Washers with Tapered Thickness
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Solution Overview
Problem
Rotatable cutting tool washers wear unevenly, leading to thin outer edges that become razor-sharp, necessitating frequent replacements and increasing material costs due to the need for uniform thickness across the washer.
Innovation Solution
Designing washers with a tapered surface that increases thickness from the inner radius to the outer radius, allowing for a thicker outer edge while maintaining a thinner inner edge, which reduces wear and extends tool life without unnecessary material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the thickness of the washer is increased uniformly across the entire washer, then the life of the washer is extended, but material costs and resource usage increase unnecessarily
Solution Approach 1:
The washer features non-uniform thickness distribution with a thicker outer edge and thinner inner portion. This local quality variation matches the wear pattern where the outer edge experiences more wear than the inner portion, providing material where needed while conserving resources where wear is minimal.
2Reliability
If the outer edge thickness of the washer is increased, then wear resistance is improved and razor-sharp edges are prevented, but the overall washer size and material usage increase
Solution Approach 1:
The washer has varying thickness with the outer edge being thicker than the inner portion. This local quality differentiation provides enhanced wear resistance and prevents razor-sharp edges at the outer perimeter while maintaining minimal material volume in the inner region where wear is less severe.
Data Source
AI summary
The present invention provides rotatable cutting tools having washers with changing thicknesses. One side of the washer has a tapered surface that increases the thickness of the washer from the inner radius towards the outer radius, resulting in a thicker portion at the outer edge of the washer. The rotatable cutting tool may also have a bit with a tapered surface. The tapered surface of the bit may be structured and arranged to engage with the tapered surface of the washer. The rotatable cutting tool may also include a holder such that the assembled rotatable cutting tool includes the washer between the bit and the holder with the bit inserted into the holder and washer.