Automated Pin-Changing for Gemstone Cutting and Polishing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing method for cutting and polishing gemstones relies heavily on manual judgment and experience for pin-changing operations, leading to inaccuracies and lack of reproducible accuracy in maintaining the required angles and orientations during the cutting and polishing process.
Innovation Solution
A method and apparatus for automating the pin-changing process by using a follow-on pin with a viscoplastic adhesive, where the new pin is positioned at a different location from the old pin, and thermal energy is applied to weaken the adhesive bonding location, allowing for precise release and transfer of the stone without thermal shock, ensuring accurate coordinate system retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual judgment and experience are used for pin-changing operations, then the process is simple and flexible, but the accuracy and reproducibility of maintaining required angles and orientations deteriorates
Solution Approach 1:
The patent replaces manual mechanical operations with an automated system that uses optical scanning to detect the stone's geometry and a computer-controlled mechanism to apply pins at precise locations. The system automatically calculates and maintains the required angles and orientations without relying on manual judgment, thereby improving manufacturing precision while keeping the operation straightforward through automation.
Solution Approach 2:
The patent creates a digital copy or model of the stone's geometry through optical scanning. This digital representation is then used by the computer system to determine exact pin placement locations and orientations, ensuring high accuracy and reproducibility without requiring manual measurement and judgment for each operation.
2Manufacturing precision
If automated pin-changing is implemented, then manufacturing precision and reproducibility improve, but device complexity increases
Solution Approach 1:
The patent employs a multi-functional integrated system where a single apparatus performs optical scanning, geometric calculation, and physical pin application. The computer system serves multiple purposes: storing stone geometry data, calculating optimal pin locations, controlling the positioning mechanism, and monitoring the process. This consolidation reduces overall system complexity compared to having separate systems for each function.
Solution Approach 2:
The system is designed to be self-sufficient by automatically scanning the stone, calculating pin placement parameters, and executing the pin-changing operation without requiring external intervention or complex coordination between multiple independent systems. The computer-controlled mechanism uses the scanned geometric data to autonomously determine and execute the precise pin placement.
3Ease of manufacture
If thermal energy is applied to weaken adhesive bonding, then the pin release process becomes controlled and precise, but risk of thermal shock to the stone increases
Solution Approach 1:
The patent applies thermal energy locally and selectively only to the adhesive bonding area where the pin is attached to the stone. The heating mechanism is positioned to target specifically the resin adhesive, not the stone itself. This localized heating weakens the adhesive bond for controlled pin release while minimizing thermal energy exposure to the stone, thereby reducing the risk of thermal shock.
Solution Approach 2:
The adhesive resin acts as an intermediary between the pin and the stone. By applying thermal energy to weaken this intermediary substance, the pin can be released in a controlled manner without directly applying force or thermal shock to the stone. The resin absorbs the thermal energy and facilitates the release process while protecting the stone from harmful effects.
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 ensures high accuracy and reproducibility in the pin-changing operation, maintaining precise geometrical alignment and reducing the reliance on manual judgment, thereby improving the consistency and quality of gemstone cutting and polishing.
Implementation Method 1
thermal energy is applied to weaken the adhesive bonding location
Implementation Method 2
thermal energy is applied to weaken the adhesive bonding location, allowing for precise release and transfer of the stone without thermal shock
Data Source
AI summary
A next processing pin is applied as a follow-on pin to a stone, wherein the stone is held by a preceding pin and fixed to the stone by way of a first adhesive bonding location. The preceding pin is separated from the stone. The follow-on pin is fixed to the stone by way of a second adhesive bonding location spaced from the first adhesive bonding location. The follow-on pin frontally receives a fluid adhesive at a spacing from the stone and the spacing between the adhesive-coated front end and the stone is reduced until the adhesive front end contacts the stone. The adhesive is hardened at the contact location as the second adhesive bonding location and heat is transferred by way of the preceding pin to the first adhesive bonding location A force component is exerted on the preceding pin to release the pin from the stone and to hold the stone with the next pin.