Diamond Surface Polishing via Laser Heating and Carbide-Forming Tool
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing diamond surface polishing methods face challenges such as low energy efficiency, short tool life, difficulty in maintaining stability, and incompatibility with rugged three-dimensional surfaces due to high costs, complex apparatus requirements, and generation of abrasive powder.
Innovation Solution
A method using a polishing member with a linear, belt-like, or rod-like shape made of metals that easily react with carbon, such as Zr, Ta, Ti, or Al, or carburizing metals like Fe, Ni, Co, which are heated and used to rub the diamond surface, allowing for continuous or intermittent contact to prevent saturation and maintain surface pressure stability, while laser irradiation preheats the diamond surface for efficient polishing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mechanical polishing using diamond grains or grind stone is used, then polishing can be performed, but the polishing time is extended and the tool life is short due to abrasion of both the tool and workpiece
Solution Approach 1:
The patent replaces mechanical abrasion with a chemical reaction-based polishing mechanism. A metal polishing member that reacts chemically with diamond carbon (such as iron, nickel, or cobalt) is used instead of traditional diamond grains. The chemical reaction selectively removes diamond material without requiring mechanical abrasion, thereby extending tool life while maintaining polishing efficiency
Solution Approach 2:
The patent applies ultrasonic vibration to the polishing member, changing the physical state and interaction mode between the polishing member and workpiece. The ultrasonic frequency (20-100 kHz) creates dynamic contact conditions that enhance the chemical reaction efficiency while preventing tool wear, thus improving both productivity and reliability
2Productivity
If ultrasonic oscillation with metal polishing member is used, then polishing efficiency is improved, but temperature control becomes difficult and energy efficiency is low
Solution Approach 1:
The patent incorporates temperature sensing and control mechanisms that provide feedback to the ultrasonic oscillation system. When the temperature reaches the optimal range (50-200°C), the system automatically adjusts or stops ultrasonic power input, preventing energy waste from excessive heating while maintaining polishing efficiency
Solution Approach 2:
The patent optimizes the ultrasonic frequency range (20-100 kHz) to match the resonant frequency of the polishing member-workpiece system, maximizing polishing efficiency while minimizing energy consumption. The frequency is dynamically adjusted based on temperature feedback to maintain optimal energy efficiency
3Temperature
If high pushing force is applied to elevate temperature, then polishing temperature increases, but the apparatus size must be increased and the structure becomes bulky
Solution Approach 1:
The patent uses ultrasonic vibration (20-100 kHz) of the polishing member to generate frictional heat and enhance the chemical reaction rate, achieving the required polishing temperature (50-200°C) without applying excessive mechanical pushing force. This eliminates the need for bulky heating apparatus while maintaining optimal polishing temperature
Solution Approach 2:
The patent replaces mechanical force-based heating with ultrasonic vibration-based heating. The ultrasonic oscillation converts electrical energy directly into thermal energy through high-frequency mechanical vibrations, achieving temperature control without requiring large mechanical pressing forces or external heating devices
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
This approach extends the life of the polishing member, reduces abrasive powder generation, achieves high surface smoothness, and allows for efficient polishing of complex surfaces without requiring expensive materials or bulky apparatus, with localized heating ensuring precise control over the polishing process.
Implementation Method 1
irradiating a laser beam onto a diamond surface to be polished so that the diamond surface is heated to a specific temperature range
Implementation Method 2
a polishing method which conducts the polishing by using a polishing member constituted by a metal that easily reacts with carbon in the diamond crystals
Implementation Method 3
applying ultrasonic waves onto the polishing member, and pushing the polishing member onto the surfaces of the diamond while the polishing member is undergoing ultrasonic oscillation
Implementation Method 4
Upon utilizing the heat of friction produced by ultrasonic oscillation
Data Source
Figure 1
Figure 2
Figure 3(a)~3(c)
AI summary
[Problems] To provide a method of polishing the diamond-surfaces which generates abraded powder less, enables the polishing member to maintain an extended life and to be easily controlled, makes it possible to obtain the surfaces of a high degree of smoothness, and can be easily applied to polishing rugged three-dimensional surfaces, too. [Means for Solution] A method of polishing the diamond-surface 1a by using a polishing member 3a that has a metal-surface that easily reacts with carbon or of a carburizing metal, irradiating the diamond-surface 1a with a laser beam 5 prior to polishing the diamond-surface 1a with the polishing member 3a, following the irradiation with the laser beam 5, the polishing is conducted by rubbing a laser beam-irradiated portion with the polishing member 3a.