Conductive Diamond Tool Surface to Prevent Chip Collection
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Solution Overview
Problem
Cutting chips collect on diamond tools due to electrostatic attractive force, affecting machining performance.
Innovation Solution
A diamond tool with a single-crystal portion and a conductive portion, where the conductive portion includes hydrogen-terminated diamond, enhancing electrical conductivity and reducing chip collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a diamond tool with insulating single-crystal diamond is used, then machining precision is maintained, but cutting chips collect on the tool surface due to electrostatic attraction
Solution Approach 1:
The diamond tool is divided into two distinct portions: an insulating single-crystal diamond base for maintaining machining precision, and a conductive portion (formed by CVD diamond or similar methods) for preventing chip collection. This segmentation allows each portion to fulfill its specific function without compromising the other.
Solution Approach 2:
The conductive portion is applied locally to specific areas of the diamond tool where chip collection occurs, such as the tool surface or cutting edges. This localized treatment maintains the insulating properties of the bulk single-crystal diamond while providing electrostatic discharge capability at critical locations.
2Object-generated harmful factors
If a conductive coating is applied to the diamond tool surface, then electrostatic charging is reduced, but the tool surface shape may deform
Solution Approach 1:
The thickness of the conductive portion is controlled within a specific range (1 nm to 2000 nm, preferably 10 nm to 1000 nm). By optimizing this parameter, the conductive layer provides sufficient electrostatic discharge capability while remaining thin enough to prevent significant surface shape deformation or thermal interference during machining operations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The tool surface is resistant to electrical charging, minimizing chip collection and improving machining performance.
Implementation Method 1
The conductive portion includes hydrogen-terminated diamond. This increases the electrical conductivity of the conductive portion.
Implementation Method 2
The surface of the diamond tool defines a tool surface that has electrical conductivity and is thus resistant to electrical charging.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
A diamond tool (20) comprises: a base part (30) that contains a single crystal part (32) constituted of single crystal diamond; and a conductive part (40) formed on the single crystal part (32). The conductive part (40) contains a conductive part surface (41) that constitutes the surface of the diamond tool (20). The base part (30) is constituted of only the single crystal part (32) exhibiting electrical insulating behavior.