A Method of Checking Pipeline Assembly Based on Computer Aided Design

Abstract

The invention belongs to the field of digitalized designs and relates to a computer aided design based pipeline assembly inspection fixture design method used for machining of pipeline parts of aero-engines and gas turbines. The method includes: setting a parametric three-dimensional digital component model of a pipeline assembly inspection fixture, setting a final assembly digital model of a parametric pipeline assembly inspection fixture associated with the parametric three-dimensional digital component model, reserving an interface matched with a parameter extraction procedure, using a parameter extraction procedure based on corresponding secondary language development under three-dimensional modeling software and cyclically and automatically accessing to a lowermost database of the three-dimensional modeling software to recognize characteristics of a guide pipe digital product model, automatically extracting related geometric parameters, feeding back characteristic parameters, driving geometric feature size of the component model of the pipeline assembly inspection fixture, and automatically updating the assembly relation and assembly size of the final assembly model of the pipeline assembly inspection fixture. By means of the computer aided design based pipeline assembly inspection fixture design method, parts can be analyzed automatically, and digital modeling of the pipeline assembly inspection fixture can be completed quickly.

Description

technical field [0001] The invention belongs to the field of digital design, and relates to a method for inspecting pipeline assembly based on computer aided design for processing pipeline components in aeroengines and gas turbines. Background technique [0002] In order to save space on engines and gas turbines, various pipelines are designed to overlap and cross each other. In order to avoid mutual interference of pipelines, the spatial geometry of the conduits is very complicated. In addition, there are many types of pipeline components, large quantities, and different sizes and lengths, which have stricter manufacturing tolerance requirements. After the pipe is bent and formed, it is welded with various pipe joints and flanges and its position is inspected and accepted. For this reason, the corresponding pipeline component assembly and inspection tool must be used to complete this work. At present, the relevant tooling of pipeline components is manually designed by the ...

AI Technical Summary

Problems solved by technology

At present, the relevant tooling of pipeline components is manually designed by the tooling designer in two dimensions. Due to the complex spatial position of the pipeline, it is necessary to characterize the precise spatial position of each section of the pipeline. In the two-dimensional design, the projection relationship is complex and requires a wealth of Spatial imagination and fixture design experience, after repeated adjustments many times to meet the requirements

Due to the heavy design workload and the complex conduit space, the design efficiency is low and the design quality is difficult to guarantee

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