Bolt hole alignment detection device

Abstract

The invention provides a bolt hole alignment detection device. The bolt hole alignment detection device comprises a positioning rod capable of being positioned in any position in a space, a two-way visual field camera located at the end of the positioning rod, and an information processing module, wherein the two-way visual field camera comprises a first lens and a second lens which have the sameaxis; the first lens and the second lens can shoot in two directions with an included angle of 180 degrees, so as to obtain image information of at least one first bolt hole of a first bolt hole set located on the first lens side and the image information of at least one second bolt hole of a second bolt hole set on the second lens side; and the information processing module is used for judging the alignment information of the first bolt hole set and the second bolt hole set, based on the image information of the at least one first bolt hole and the image information of the at least one secondbolt hole, wherein the first bolt hole set and the second bolt hole set are located in two planes which are parallel to each other.

Description

technical field [0001] The invention relates to the field of aero-engine manufacturing, in particular to a device for detecting alignment of bolt holes. Background technique [0002] Civil aviation turbofan engine assembly is characterized by a large number of parts and connectors, complex product structure and shape, and high assembly quality requirements. However, the current level of domestic aero-engine assembly technology is still very backward, with a large amount of manual labor and a long production cycle. It also depends on the experience of the operator. Taking the installation of the low-pressure turbine unit as an example, the installation technology of the low-pressure turbine unit follows the traditional assembly method and management mode, and still uses two-dimensional process design, adopts the assembly scheme of man + crane, and uses special tooling, and the production management relies too much on personnel. According to experience, the probability of qua...

AI Technical Summary

Problems solved by technology

On the one hand, this method requires manual disassembly and assembly of the guide pins, which is time-consuming, laborious, and inefficient; on the other hand, in order to ensure the easy installation and removal of the guide pins, the alignment accuracy of the guide pins is often not high, resulting in the alignment accuracy of the bolt holes on the installation side. Low, prone to bumps and stress concentration during bolt tightening, resulting in damage to parts

In addition, the annular mounting edge of the engine is generally an interference fit, and the seam needs to be heated or cooled in advance during assembly. The traditional method does not monitor the change of the seam size. Once the assembly process is long, the size of the mounting edge will be restored. Afterwards, if the assembly is forced to be assembled, the parts will be damaged, and if it is reheated or cooled, the assembly efficiency will be affected

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