Wire-Wound Component Drum Core Tapered Flange Design
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Solution Overview
Problem
Existing wire-wound components face issues with wire damage and winding disturbance due to the interaction between the winding wire and flange parts, particularly when the wire is wound around a drum core with square flange parts, as the ridgelines on the inner corners of the flange corners contact the wire, leading to limited adjustability of winding tension and angle.
Innovation Solution
The core features tapered surfaces on the facing inner surfaces of the flange parts, with at least one flange part having a polygonal shape and a curved side face that convexes roughly at the center, allowing the interval between the flange parts to increase towards the outer sides, reducing the load on the wire during winding and enabling optimal adjustment of winding tension and angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a drum core with square flange parts is used, then the structure is simple and manufacturing is easy, but the ridgelines on the inner corners of the flange corners contact the winding wire, causing wire damage and winding disturbance
Solution Approach 1:
The patent applies local quality by providing tapered surfaces specifically on the inner surfaces of the flange parts, while the rest of the core maintains its simple square drum structure. This localized modification eliminates wire damage at the critical flange corners without complicating the overall manufacturing process
Solution Approach 2:
The patent introduces curved surfaces (tapered surfaces) on the flange inner surfaces instead of sharp ridgelines. This curvature prevents the winding wire from being caught or damaged by corner ridgelines, while maintaining the simple drum core structure
2Reliability
If the winding tension and angle are adjusted to prevent wire damage, then wire damage is reduced, but the allowable setting width is limited and adjustment is difficult
Solution Approach 1:
The patent applies preliminary action by pre-forming tapered surfaces on the flange inner surfaces before the winding process. This preliminary structural modification eliminates the need for difficult real-time adjustments of winding tension and angle, as the tapered surfaces inherently prevent wire contact with corner ridgelines
3Reliability
If tapered surfaces are provided on the flange inner surfaces, then wire damage is prevented and winding reliability is improved, but the device complexity increases
Solution Approach 1:
The patent minimizes device complexity by applying tapered surfaces only to the specific inner surfaces of the flange parts where wire damage occurs, rather than modifying the entire core structure. This localized approach improves reliability without significantly increasing overall device complexity
Data Source
AI summary
A drum core for a wire-wound component having a pair of flange parts provided on both ends of an axis core around which a winding wire is wound, with tapered surfaces of roughly conical shape formed on their facing inner surfaces in such a way that the interval of the inner surfaces increases toward the outer sides of the flange parts. The flange parts have roughly a rectangular shape and the sides along which their long side faces contact the tapered surfaces have the curved shapes that convex roughly at the center. The curved shapes make the height of the corners of the flange parts from the reference surface lower than the height of the convex parts of the curved shapes from the reference surface, and the loads received by the wire during winding are reduced as a result.