Cable Straightening Rollers With Eddy-Current Braking

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Solution Overview

Problem

Existing cable straightening devices suffer from issues such as friction-induced damage, heat generation, and mechanical deformation during braking, which compromise cable quality and disrupt processing.

Innovation Solution

A magnetic braking system using neodymium magnets as eddy current brakes that contactlessly engage with the outer rings of rollers to gently brake the cable, maintaining high quality and preventing damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If mechanical friction braking is used during cable straightening, then the cable can be stopped and controlled, but friction-induced heat and mechanical stress deform and damage the cable

Engineering Contradiction:

Improvecable feeding speed controlVSAvoidfriction-induced heat and mechanical deformation

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical friction braking system with an electromagnetic braking system. Electromagnetic brakes use magnetic fields to generate braking force without mechanical contact, thereby eliminating friction-induced heat and mechanical deformation of the cable while maintaining speed control capability during the straightening process.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces an electromagnetic field as an intermediary between the braking mechanism and the cable. The electromagnetic field transmits the braking force indirectly through magnetic interaction, preventing direct mechanical contact and the associated harmful friction effects on the cable surface and structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If high-speed processing is implemented to increase productivity, then cable processing output improves, but cable damage risk increases due to accelerated friction and stress

Engineering Contradiction:

Improvecable processing outputVSAvoidcable quality and damage prevention

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

By replacing mechanical friction brakes with electromagnetic brakes, the system enables high-speed cable processing without the damaging friction effects. The electromagnetic braking mechanism provides smooth, contactless deceleration that maintains cable integrity even at high processing speeds, thereby simultaneously achieving high productivity and high reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Device complexity

If traditional roller friction braking is used, then the structure remains simple, but cable quality deteriorates due to surface friction and deformation

Engineering Contradiction:

Improvebraking system structureVSAvoidcable surface quality and dimensional accuracy

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent substitutes mechanical friction-based roller braking with an electromagnetic braking system. This replacement eliminates direct mechanical contact between rollers and cable, preventing surface friction marks and dimensional deformation while maintaining acceptable system complexity through the use of standard electromagnetic brake components.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

The solution ensures gentle braking without mechanical stress, preserving cable quality and preventing interruptions due to damage, while allowing high-speed processing.

Implementation Method 1

A magnetic braking system using neodymium magnets as eddy current brakes that contactlessly engage with the outer rings of rollers

Methodology Applied

Scientific EffectEddy current: Eddy Currents

Implementation Method 2

A magnetic braking system using neodymium magnets as eddy current brakes

Methodology Applied

Scientific EffectMagnetic field: Magnetic Field

Data Source

PatentEP4176990B1Method for braking at least one rotatable roll of an aligning device, cable processing machine with an alignment device

Publication Date: 2025.07.09 SCHLEUNIGER AG

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AI summary

The invention relates to a straightening device (15) for straightening a cable (11) along a conveying path, comprising a straightening unit (20) with a first row of rollers (21) and a second row of rollers (31) that are movable relative to each other and between which the conveying path of the cable (11) runs, wherein at least one of the two rows of rollers (21, 31) has several rotatable rollers (25, 35). A braking device (40) is provided for braking at least one of the rotatable rollers (25, 35) of at least one of the two rows of rollers (21, 31) of the straightening unit (20). The invention further comprises a method for braking at least one rotatable roller (25, 35) of at least one of the two rows of rollers (21, 31) in a straightening device (15), a cable processing machine with a straightening device (15), and an upgrade kit for a cable processing machine.