Processing method for manufacturing digital model before ultrasonic C scanning detection plan based on CATIA

Abstract

The invention belongs to the technical field of nondestructive testing, and discloses a processing method for manufacturing a digital model before an ultrasonic C scanning detection plan based on CATIA, which comprises the following steps: obtaining a CATIA digital model of a part tool corresponding to a certain part; extracting a tool surface in contact with the surface of the part from the CATIAdigital model; wherein an allowance line is preset on the tool surface; conducting cutting on the CATIA digital model according to the margin line, and setting sharp corner feature points in the cutting process; conducting positioning compensation on the sharp corner feature points according to the actual appearance features of the part, and obtaining a boundary line after positioning compensation; making an ultrasonic C scanning detection plan according to the boundary line after positioning compensation; the high efficiency of digital-analog processing before the ultrasonic C scanning detection plan is made is ensured, and the redundant positions of the edges of the parts are ensured, so that the detection graph boundaries of the parts are clear.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing, and in particular relates to a processing method for digital simulation before making an ultrasonic C-scan testing plan based on CATIA. Background technique [0002] The current main method for detecting internal defects of composite material parts, especially honeycomb sandwich parts, is ultrasonic penetrating C-scan detection. In order to ensure the best ultrasonic effect, the ultrasonic probe is required to automatically follow the change of the surface shape of the workpiece so that the incident direction of the ultrasonic wave is always consistent with the surface normal. The direction coincides. For composite structural parts with complex shapes, it is necessary to make a scanning plan consistent with its surface. [0003] At present, the main methods of making scan plans are manual production and CATIA digital modeling of parts. However, in actual operation, these two metho...

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Problems solved by technology

[0003] At present, the main methods of making scan plans are manual production and CATIA digital modeling of parts. However, in actual operation, these two methods have certain limitations. The efficiency of manual production is low, the effect is not good, and the boundary after profiling is difficult It is easy to miss inspection; the scanning plan made by CATIA digital model of parts needs to be repaired, and repair errors will easily cause collisions between equipment and parts, and due to cutting errors and small deformations, it is easy to cause missed inspections on the edges of parts

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