A method for quickly detecting the shape of lugs of joint parts and a measuring fixture

Abstract

The invention relates to a method and device for fast detection of an adapter part lug form. The geometric dimension and the form and position requirement of a part are known. Firstly, a locating hole and a tail end side wall of the part serve as a metering datum and a measuring clamp is additionally arranged. A locating shaft, a clamping block and a measuring block are arranged on the measuring clamp and correspond to the part. A set gap value exists between the measuring block and the part lug form. A filler gauge is used for detecting gap errors between the part lug form and a corresponding detection block. Form and position errors of the part form are gauged indirectly, a detection result is reliable and the operation process is easy and convenient to perform.

Description

technical field [0001] The invention relates to parts processing detection in the field of aircraft manufacturing, in particular to a method and a device for quickly detecting the shape of lugs of joint parts, and is applicable to parts with similar characteristics. Background technique [0002] In the mechanical processing of aircraft parts, the shape and position of many parts have higher requirements than the reference, and the shape of these parts is generally detected by a measuring machine. For example, the titanium joint part of an aircraft is a key part for the docking of the vertical tail part and the fuselage part. The processing quality directly affects the processing accuracy of the subsequent lug holes. [0003] The titanium joint part is difficult to process and has a long production cycle. In order to reduce the influence of the processing quality of the shape of the lug on the machining accuracy of the subsequent lug hole, after the shape of the lug is proce...

AI Technical Summary

Problems solved by technology

[0003] The titanium joint part is difficult to process and has a long production cycle. In order to reduce the influence of the processing quality of the shape of the lug on the machining accuracy of the subsequent lug hole, after the shape of the lug is processed in the prior art, it is sent to a professional measurement center to detect the shape of the lug. After the piece shape measurement is qualified, it can return to the workshop to process the ear piece hole, and then send it to the measurement center for secondary measurement of the hole position of the part

Due to the large deformation of the part lugs after processing, there is no effective detection method before sending to the measurement, and the pass rate of the first measurement is low. The repeated turnover to the measurement center seriously affects the processing efficiency, and the measurement cost is also high. Moreover, the shape of the lug and the hole of the lug are measured twice, which increases the number of process turnover and seriously affects the batch production delivery schedule of the workshop.

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