Induction-Welded Cable Installation Tool for Controlled Thermoplastic Joining

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Solution Overview

Problem

Existing automated cable material installation tools face issues with sharp edge hazards and waste generation due to ratchet heads, and difficulties in controlling weld quality due to rapid vibration and high clamping forces in ultrasonic welding.

Innovation Solution

A system featuring a pair of cable jaws with a dispensing track, a tensioning motor, an induction coil, and a power supply to securely wrap and bond thermoplastic cable material around elongate members using an electromagnetic field, with optional metallic or ferromagnetic inserts to enhance bonding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If ultrasonic welding is used to join cable material, then joining speed is improved, but weld quality control deteriorates due to rapid vibration and high clamping forces

Engineering Contradiction:
Improvejoining speedVSAvoidweld quality control
Core Design Contradiction:
ProductivityVSManufacturing precision

Solution Approach 1:

The patent replaces the mechanical ultrasonic vibration system with an induction heating system that uses electromagnetic fields to heat and melt the cable material. This substitution eliminates the rapid vibration and high clamping forces associated with ultrasonic welding, allowing for better control of weld quality while maintaining efficient joining speeds. The induction heating system provides more predictable and controllable thermal processing of the thermoplastic cable material.

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

Solution Approach 2:

The patent changes the fundamental parameter of the joining process from mechanical vibration (ultrasonic) to electromagnetic heating (induction). This parameter change allows for precise control of the heating process through frequency and power regulation, improving weld quality consistency. The electromagnetic field parameters can be precisely controlled to achieve optimal melting and bonding without the chaotic mechanical vibrations of ultrasonic welding.

Inventive Principle:
Principle #35Parameter changes

2Extent of automation

If ratchet head mechanism is used for cable installation, then automated installation is improved, but sharp edge hazards and waste generation occur

Engineering Contradiction:
Improveautomated installationVSAvoidsharp edge hazards
Core Design Contradiction:
Extent of automationVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical ratchet head cutting mechanism with an induction heating system that melts and seals the cable material ends. This substitution eliminates the sharp edges created by mechanical cutting, as the thermal process creates rounded, sealed ends. The automated installation capability is maintained through the controlled feeding and positioning systems that work in conjunction with the induction heating junction.

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

Solution Approach 2:

The patent utilizes the phase transition of the thermoplastic cable material from solid to molten state through induction heating. This phase transition allows the material to be melted at the ends, formed into sealed configurations, and then cooled to create rounded, hazard-free ends. The melting and solidification process naturally eliminates sharp edges that would be created by mechanical cutting.

Inventive Principle:
Principle #36Phase transitions

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 system effectively bonds thermoplastic cable material without sharp edges or excessive waste, providing controlled and efficient cable bundling and joining, improving the reliability of automated cable material installation.

Implementation Method 1

an induction coil to apply an electromagnetic field

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

the insert is heated by the induction coil to bond the overlapping segment of thermoplastic cable material

Methodology Applied
Scientific EffectInduction heating: Induction Heating

Data Source

PatentEP4173807A1Automated cable installation tool with induction welding joining mechanism
Publication Date: 2023.05.03 ABB (SCHWEIZ) AG
  • EP4173807A1 patent drawingFigure 1
  • EP4173807A1 patent drawingFigure 2
  • EP4173807A1 patent drawingFigure 3

AI summary

A system (100) includes a body having a pair of cable jaws (120). The pair of cable jaws (120) further includes a dispensing track on an inner circumference of the pair of cable jaws (120) to retain a segment of a thermoplastic cable material (115). The system (100) includes a piston (145). The piston (145) is configured to secure an overlapping segment of the thermoplastic cable material (115) at the weld area. An induction coil (125) is configured to apply an electromagnetic field. The system (100) includes a power supply (160).