Cable Specimen Peeling Roller for Uniform Thin Insulation Samples
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Solution Overview
Problem
Existing methods for peeling cable specimens from high-voltage cables are inefficient in producing uniform samples, particularly for non-cross-linked polyethylene (XLPE) materials, and lack the ability to analyze spatial variations in cable health, leading to costly and time-consuming processes.
Innovation Solution
A method involving a knife fixed to a roller, with a controlled distance between the knife edge and roller axis, rotating the cable specimen while maintaining a constant angle and contact points, and using rollers or chucks to hold the cable, ensuring uniform thickness and spatial resolution of peeling samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If slicing or CNC milling is used to obtain cable samples, then spatial resolution is improved, but the specimen thickness becomes much thicker and production efficiency decreases
Solution Approach 1:
The patent changes the fundamental parameter of sample thickness by using a peeling method instead of slicing or milling. The knife-roller assembly creates thin peeling samples with uniform thickness, achieving both high spatial resolution and efficient production. The distance between the knife and roller surface is controlled to produce consistently thin samples.
Solution Approach 2:
The patent replaces the complex mechanical systems of slicing or CNC milling with a simpler peeling mechanism. A knife fixed to a rotating roller peels the insulation layer off the conductor, substituting sophisticated cutting machinery with a straightforward mechanical peeling action that is both efficient and produces uniform thin samples.
2Ease of manufacture
If re-melting of cable insulation segments is performed, then sample preparation is simplified, but the method is limited to non-XLPE materials and morphological properties are affected
Solution Approach 1:
The patent replaces the thermal process of re-melting with a mechanical peeling process. The knife-roller assembly mechanically separates the insulation layer from the conductor through controlled peeling, eliminating the need for heat and chemical changes. This mechanical approach works with all insulation material types including XLPE, which cannot be re-melted.
3Device complexity
If manual peeling methods are used, then equipment complexity is reduced, but sample thickness uniformity and production speed decrease
Solution Approach 1:
The patent employs a curved roller surface against which the knife peels the insulation. The cylindrical geometry of the roller provides a consistent curvature that ensures uniform contact and uniform peeling thickness throughout the process. This curved surface geometry is key to achieving thickness uniformity while maintaining relatively simple equipment.
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
Enables the production of uniform thickness peeling samples with precise spatial resolution, allowing for efficient analysis of cable health and scalability to larger sizes, while maintaining sample integrity and uniformity.
Implementation Method 1
the knife fixing roller moves in the direction of the center of the cable specimen
Implementation Method 2
positioning the knife fixing roller onto the cable specimen such that the roller and the cutting edge are in contact with the cable specimen
Data Source
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AI summary
The present invention relates to a method of peeling a cable specimen, which method comprises the steps of fixing a knife, comprising a cutting edge, to a roller to receive a knife fixing roller, setting the distance between the rotation axis of the roller and the cutting edge of the knife to a fixed distance, holding the cable specimen, positioning the knife fixing roller onto the cable specimen such that the roller and the cutting edge are in contact with the cable specimen, rotating of the cable specimen, while the knife fixing roller moves in the direction of the center of the cable specimen. The present invention further relates to a device for peeling a cable specimen. Even further, the invention relates to a use of the device.