Cable Twisting Mandrel Structure for Uniform Lay Length
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Solution Overview
Problem
Conventional devices for twisting single cables into bundles often result in irregular lay lengths and oscillations, especially with longer cables over 5 meters, leading to poor quality cable bundles due to the guiding mandrel's design.
Innovation Solution
A device with single rotating units and a guiding apparatus featuring a thickened portion on the guiding mandrel, which separates the cables during twisting, reduces oscillations and ensures a uniform lay sequence by limiting movement and maintaining secure guidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a conventional guiding mandrel is used to separate single cables during twisting, then the cables can be guided through the twisting process, but undesirable oscillations occur especially with longer cables, resulting in irregular lay lengths
Solution Approach 1:
The guiding mandrel is designed with a thickened portion that creates a localized guiding region. This thickened portion provides enhanced guidance and stability at the critical transition zone where cables move from untwisted to twisted state, while the rest of the mandrel maintains its basic guiding function. The localized modification addresses oscillations without requiring complete redesign of the entire mandrel structure.
Solution Approach 2:
The guiding mandrel is segmented into different functional regions: a thickened portion for active guidance and separation at the transition zone, and a thinner portion for general support. This segmentation allows each region to perform its specific function optimally, with the thickened portion specifically addressing the oscillation problem in the critical area.
2Length of moving object
If the guiding mandrel is made longer to accommodate longer cables, then more cables can be processed, but oscillations increase and lay length uniformity deteriorates
Solution Approach 1:
Rather than uniformly increasing the mandrel length, the invention applies a localized thickened portion at the critical transition zone. This allows the mandrel to effectively handle longer cables without compromising lay length uniformity, as the thickened region provides stable guidance where it is most needed during the twisting transition.
3Ease of operation
If the guiding mandrel is made thinner to reduce interference, then the twisting process is less obstructed, but cable separation and guidance become insufficient
Solution Approach 1:
The mandrel is thin in most regions to minimize interference with the twisting operation, but features a localized thickened portion that provides enhanced cable separation and guidance at the critical transition zone. This localized thickening maintains twisting smoothness while improving cable separation stability where required.
Data Source
AI summary
A device and a method twist single cables about a twisting axis to form a cable bundle along an extension axis. The device includes mutually spaced single rotating units for separately holding cable ends at one end of the single cables; a twisting unit for holding and twisting cable ends at the other end of the single cables; and a guiding apparatus, to which is fastened a guiding mandrel for separating the single cables, at least in some regions, during a twisting process by the twisting unit, in a region in which there is a transition from an untwisted region to a twisted region. The guiding mandrel includes a thickened portion on a side opposite its fastening to the guiding apparatus, the thickened portion having larger dimensions in a direction transverse to the running direction of the guiding mandrel than in most of the guiding mandrel.