Twisted Pair Core Wire Untwisting for Precise Length Cutting

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Solution Overview

Problem

Existing methods for processing twisted pair cables result in uneven cutting and manual untwisting, leading to deviations in core wire length and reduced production efficiency.

Innovation Solution

A twisted pair cable processing system with a core wire untwisting device and cutting device that includes a rotating wheel, positioning body, and cutting tool, which automates the untwisting and cutting processes to ensure precise core wire length.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual untwisting is used, then operation simplicity is maintained, but productivity decreases

Engineering Contradiction:
Improvemanual operation simplicityVSAvoidproduction efficiency
Core Design Contradiction:
Ease of operationVSProductivity

Solution Approach 1:

The untwisting device uses the cable's own twisted structure to drive the rotating wheel. When the cable is fed through the positioning body, the twisted core wires automatically rotate the positioning body, which in turn rotates the rotating wheel to unwind the cables. This self-service mechanism eliminates the need for manual untwisting operations while maintaining operational simplicity.

Inventive Principle:
Principle #25Self-service

2Device complexity

If manual positioning on clamp mechanism is used, then device complexity is reduced, but manufacturing precision deteriorates

Engineering Contradiction:
Improvepositioning mechanism complexityVSAvoidcore wire length precision
Core Design Contradiction:
Device complexityVSManufacturing precision

Solution Approach 1:

The patent replaces the traditional mechanical clamp positioning system with a positioning body that has precise positioning holes. The positioning holes are pre-configured with exact dimensions and positions to ensure accurate cable placement. This substitution of the positioning mechanism achieves precise core wire length control without requiring complex clamp adjustment mechanisms.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The positioning body is pre-configured with positioning holes at predetermined positions before the cutting operation. This preliminary preparation ensures that when the cable is inserted, it is automatically positioned at the correct location for accurate cutting, eliminating the need for complex real-time adjustments during the cutting process.

Inventive Principle:
Principle #10Preliminary action

3Ease of manufacture

If uneven cutting end face is accepted, then ease of manufacture is improved, but manufacturing precision deteriorates

Engineering Contradiction:
Improvecable cutting easeVSAvoidcable positioning accuracy
Core Design Contradiction:
Ease of manufactureVSManufacturing precision

Solution Approach 1:

The positioning body acts as an intermediary between the cable and the cutting mechanism. It provides a reference surface and positioning holes that ensure accurate cable positioning regardless of the cable's external condition. The positioning holes guide the cable core wires to precise locations, compensating for any unevenness in the cable's outer layer and ensuring accurate cutting positions.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentEP4629457A1Twisted pair cable processing system, twisted pair cable cutting method and untwisting method
Publication Date: 2025.10.08 TYCO ELECTRONICS (SHANGHAI) CO LTD
  • EP4629457A1 patent drawingFigure 1A~1B
  • EP4629457A1 patent drawingFigure 1C
  • EP4629457A1 patent drawingFigure 2

AI summary

The present invention discloses a twisted pair cable processing system, a twisted pair cable cutting method and a twisted pair cable untwisting method. The twisted pair cable processing system comprises of: a frame (20); and a core wire untwisting device which is installed on the frame (20) for untwisting a pair of exposed core wires (11) of a twisted pair cable (1). The core wire untwisting device comprises of: an installation plate (2), fixed to the frame (20); a rotating wheel (6) which is rotatably mounted on the installation plate (2) and formed with an axial through installation hole (60); a positioning body (5) which is embedded into the installation hole (60) of the rotating wheel (6) and formed with a pair of core wire insertion holes (5a); and a driver for driving the rotating wheel (6) and the positioning body (5) embedded in the rotating wheel (6) to rotate together. When the ends of the pair of exposed core wires (11) of the twisted pair cable (1) are inserted into the pair of core wire insertion holes (5a), the driver drives the rotating wheel (6) and the positioning body (5) to rotate to unwind the pair of exposed core wires (11) of the twisted pair cable (1). Therefore, the present invention can automatically realize the untwisting of a pair of core wires of the twisted pair cable, improving production efficiency.