Ring Manufacturing Method Using Partial Joint Segmentation
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Solution Overview
Problem
Existing ring manufacturing methods using the mokume-gane technique struggle to create matching rings with a design that emphasizes the concept of birth from the same single thing, as they typically involve cutting a single metal plate into two rings, limiting the expression of a unified origin.
Innovation Solution
A method involving slitting a single ring to form two separate ring portions, bending them at a predetermined angle, measuring and forming a slit in the joint portion to achieve a preset length, and then cutting the joint to create two rings with distinct projection portions that emphasize their shared origin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single metal plate is cut into two metal plates to form matching rings, then common characteristic patterns can be formed on both rings, but the design concept of birth from the same single thing is not sufficiently emphasized
Solution Approach 1:
The single ring is slit into two ring portions while leaving a partial joint portion connected, creating a segmented structure that maintains physical connection. This allows the rings to be separated into two distinct pieces while retaining visual evidence of their common origin through the partial joint portion with projection portions.
Solution Approach 2:
The invention transitions from a two-dimensional cut (completely separating the metal plate) to a three-dimensional partial separation where the rings are bent at predetermined angles and connected by a partial joint portion. This dimensional change allows both rings to maintain spatial separation while preserving their unified origin through the connected joint portion.
2Ease of operation
If the single ring is completely cut into two separate pieces, then the rings can be fully separated, but the visual evidence of shared origin is lost
Solution Approach 1:
Instead of completely cutting through the single ring, the invention applies partial cutting that leaves a partial joint portion connected. This partial action achieves sufficient separation for operational purposes while retaining the visual information of shared origin through the remaining connection and projection portions.
3Adaptability or versatility
If multiple processing steps are added to create projection portions and slits, then the design concept is enhanced, but the manufacturing complexity increases
Solution Approach 1:
The slit is formed in the partial joint portion before the final cutting step. This preliminary action prepares the structure for subsequent separation while maintaining the partial connection, allowing the projection portions to be created in an organized sequence that reduces overall manufacturing complexity.
Data Source
AI summary
In a case of a “mark left” type, a slit is formed on a line side (slit side) of a joint portion. The slit is formed, for example, with a scroll saw. By the formation of the slit, a length of the joint portion in a direction orthogonal to an axial direction of a single ring is set to approximately 0.7 mm. In a case of a “mark removed” type, a slit and a slit are formed respectively on the line side (slit side) and a side opposite thereto of the joint portion. Those slits are formed, for example, with the scroll saw. By the formation of those slits, the length of the joint portion in the direction orthogonal to the axial direction of the single ring is set to approximately 0.8 mm.