Nondestructive testing method for appearance and roughness of inner surface of deep hole

Abstract

The invention provides a nondestructive testing method for the appearance and roughness of an inner surface of a deep hole, belongs to the field of precision measurement, can detect the appearance of an inner surface of a complex structure, and is implemented based on mixed glue, a glue extruder and a mixed glue nozzle, wherein the mixed glue is formed by mixing tube glue A and tube glue B. The mixed tube glue is extruded by the glue extruder, the tube glue A and the tube glue B are fully mixed and stirred through the mixing glue nozzle and then extruded into the surface of the inner cavity of the complex structure within the working time at the working temperature, the fully stirred mixed glue automatically reacts in a short time and is cured into elastic colloid, and the microstructure of the inner surface of a workpiece is copied; and then the cured elastic colloid is stripped from the surface of the workpiece structure, and an appearance measuring instrument is used for measuring the elastic colloid, so that the appearance information of the workpiece can be accurately observed. According to the invention, the change trend of the appearance can be observed; high-precision copying and recording can be carried out on the appearances of a plurality of workpieces or the workpieces at different machining stages rapidly in real time, and the measurement precision is ensured.

Description

technical field [0001] The invention belongs to the field of precision measurement, and relates to a non-destructive detection method for inner surface topography and roughness of deep fine holes and other complex structures. Background technique [0002] With the rapid development of electric light sources, semiconductors, optical communications, military industry, aviation, and biomedical fields, high-precision pipe fittings are widely used in these fields. The roughness and cleanliness of the inner wall of the pipe also put forward higher requirements. However, the precise structural form of the parts is often not conducive to the measurement of the inner surface roughness, which constitutes a difficulty in the detection of the inner surface roughness. [0003] At this stage, the measurement methods for the inner surface roughness of deep holes are generally divided into two categories: contact measurement and non-contact measurement. Non-contact measurement methods main...

AI Technical Summary

Problems solved by technology

[0005] The invention solves the technical problem: Aiming at the problem that it is difficult to detect the internal surface morphology and roughness of deep and small holes and other complex structures, a method for detecting the internal surface morphology and roughness of complex structures based on mixed glue is provided, which is simple to operate, Low cost, high measurement accuracy

Images