Coated Cutting Tool Composition for Optical Damage Detection
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Solution Overview
Problem
Existing coated tools have a large variation in reflectance with respect to wavelength, making it difficult to accurately detect damaged portions using multispectral or hyperspectral imaging techniques.
Innovation Solution
A coated tool with a coating layer containing specific elements such as Group 4a, 5a, and 6a elements, Al, Si, B, Y, and Mn, along with C and N, is developed. The coating layer has a reflectance variation of 15% or less between its maximum and minimum values within the wavelength range of 400 nm to 1500 nm, facilitating easier detection of damaged areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional coating layer is used, then wear resistance is improved, but reflectance variation with wavelength becomes large making damaged portion detection difficult
Solution Approach 1:
The patent applies parameter changes by modifying the coating layer composition to include specific elements (Group 4a, 5a, and 6a elements, Al, Si, B, Y, Mn, C, and N) in controlled proportions. This compositional parameter adjustment reduces the reflectance variation with wavelength to 15% or less, enabling accurate damaged portion detection while preserving wear resistance properties.
Solution Approach 2:
The patent employs composite materials by creating a multi-element coating layer that combines various metal elements (Group 4a, 5a, 6a elements, Al, Si, B, Y, Mn) with non-metallic elements (C, N). This composite structure achieves both improved wear resistance and reduced reflectance variation, resolving the contradiction between protective function and detectability.
2Measurement precision
If multispectral or hyperspectral imaging is used for detection, then detection accuracy improves, but device cost increases
Solution Approach 1:
The patent enables the use of more affordable imaging devices (such as standard RGB cameras) by reducing the reflectance variation of the coating layer. This allows damaged portions to be detected using simpler, less expensive equipment rather than requiring costly multispectral or hyperspectral imaging systems, while maintaining detection accuracy.
Solution Approach 2:
By changing the optical parameters of the coating layer (reflectance variation ≤15%), the patent makes the coating compatible with simpler imaging devices. This parameter optimization allows standard cameras to achieve sufficient detection accuracy, eliminating the need for complex and expensive specialized imaging equipment.
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 coated tool enables accurate detection of damaged portions using both expensive imaging devices like multispectral cameras and more affordable devices like CCD cameras, thereby reducing detection costs and improving reliability.
Implementation Method 1
a difference between a maximum value and a minimum value of a reflectance of the coating layer in a wavelength range of 400 nm or more and 1500 nm or less is 15% or less of the maximum value
Data Source
AI summary
A coated tool according to the present disclosure includes a base body and a coating layer located on a surface of the base body. The coating layer contains at least one element selected from Group 4a, 5a and 6a elements under the periodic table, Al, Si, B, Y, and Mn, and at least one element selected from C and N. In the coated tool according to the present disclosure, a difference between a maximum value and a minimum value of a reflectance of the coating layer in a wavelength range of 400 nm or more and 1500 nm or less is 15% or less of the maximum value.