Large cylindrical part outer surface circumference measuring device and using method thereof

Abstract

The invention discloses a large cylindrical part outer surface circumference contact type measuring device, and relates to the field of aerospace assembly manufacturing. According to the measuring conditions of the measuring device, a cylindrical part can be horizontally loaded by an existing cylindrical part transferring device, and the cylindrical part can be controlled to accurately auto-rotateby one circle. The circumference is converted into the standard roller rolling distance by using a standard roller with an angle encoder to maintain non-slip rolling on the outer surface of the cylindrical part, and a counter is used for recording a measured value. The measuring device can adapt to the eccentric rotation and the axial movement of the cylindrical part through the axial and radialtwo-degrees-of-freedom design of the measuring head extension cylindrical part. The measuring device can achieve installation stability and disassembly convenience through the decoupling of a supporting frame and a base. According to the measuring device, the operation is easy to achieve, the cost is low, the efficiency is high, the automatic and high-precision measurement of the large cylindricalpart outer surface circumference can be achieved, and a traditional manual tape measuring method is replaced.

Description

technical field [0001] The invention relates to the fields of aerospace manufacturing, mechanical manufacturing and on-site measurement, in particular to a contact measuring device for the circumference of the outer surface of a large cylindrical part. Background technique [0002] In the field of aerospace manufacturing, the manufacturing quality level of cylindrical parts determines the overall service performance such as the reliability and carrying capacity of the aircraft fuselage and rocket body. Accurate in-situ measurement in the manufacturing process of cylindrical parts provides a guarantee for improving the manufacturing quality level of cylindrical parts. Among them, the accurate measurement of the outer circumference of the cylindrical part can carry out the qualified inspection of the partial segment of the cylindrical part for welding on the rack, so as to ensure that the outer circumference of each partial segment of the cylindrical part for welding is consis...

AI Technical Summary

Problems solved by technology

When the tape goes around the outer surface of the cylindrical part, the worker needs to manually align the end of the tape with the edge of the end face of the cylindrical part. However, the size of the cylindrical part is large, so it is difficult to ensure that the tape is strictly aligned with the edge of the end face on the entire outer surface of the cylindrical part. ;There is a certain flexibility in the material of the tape measure, and the measured value will change with the magnitude of the pulling force, so it is necessary for the worker to maintain a certain pulling force every time he uses it, which has high requirements for the worker's operation; the measuring value of the tape measure is completed by the worker's manual reading, and the reading process Estimation error exists and gross error may be due to misreading

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