Preparation device, method and test method of sample for cable sheath shape measurement

Abstract

The invention discloses a preparation device, method and testing method of a sample for measuring the shape of a cable sheath. The device includes: an outer sheath holder, and a resin container equipped with one or more of the outer sheath holders. The sample preparation method includes the following steps: (1) embedding and fixing; (2) sample sectioning. The test method includes imaging a smooth cut surface of a sample for measuring the shape of the cable sheath, and analyzing the image containing the cross-section of the sheath sample to obtain the shape parameters of the cable sheath. The sample preparation method provided by the present invention avoids severe deformation of the sheath sample except for the core cable during cutting and processing through sample embedding, and measures the thickness and outer dimension of the sheath without destroying the original shape of the sample.

Description

technical field [0001] The invention belongs to the technical field of measuring the structural dimensions of cable sheaths, and more particularly relates to a preparation device, method and testing method for samples for measuring the shape of cable sheaths. Background technique [0002] Due to the wide variety of cable products, there are great differences in the soft and hard textures of products with different uses and sheath materials. For the test of cable sheath thickness and external dimensions, the traditional method is to perform the test in accordance with Part 8 of GB / T2951.11-2008, manually using tools such as sharp blades to cut slices along the axial direction for testing. For samples with softer materials, the original state of the sample is destroyed during the cutting process, resulting in large errors in the test results, and the thickness and shape of the sample cannot be truly and accurately tested. In addition, if a vernier caliper is used for the test...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a preparation device, method and testing method of a sample for cable sheath shape measurement, the purpose of which is to avoid damage caused by cutting the sheath sample by embedding and fixing The sheath is deformed, so as to obtain a sheath sample with good machining performance, which accurately reflects the outer sheath size, thereby solving the problem that the incision size cannot accurately reflect the outer sheath due to the deformation of the outer sheath sample in the prior art. Set of technical issues of dimensions in the natural state

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