Method and device for simultaneously detecting surface shapes and thickness distribution of inner wall and outer wall of thin-wall rotary body

Abstract

The invention discloses a method and a device for simultaneously detecting surface shapes and thickness distribution of inner and outer walls of a thin-wall rotating body. The spectrum confocal measuring head (10) is driven by the bottom rotary table (18), the main measuring head rotary table (11) and the linear motion shaft mover (16) to perform profiling scanning along the surface of the thin-wall shell type rotary body (5), so that the detection of the surface shapes and thickness distribution of the inner wall and the outer wall of the thin-wall shell type rotary body (5) can be realized at one time; mechanical interference caused by arranging a measuring head in the thin-wall shell type rotary body (5) can be avoided, and coordinate consistency of surface shape measurement data of the inner wall and the outer wall and thickness distribution data in a three-dimensional space can be guaranteed, so that the overall measurement precision is guaranteed; and meanwhile, the method can be suitable for detecting different types of thin-wall shell type revolved bodies (5) such as conformal fairings and hemispherical gyroscope harmonic oscillators, and a detection means with universality, high efficiency and high precision is provided for the manufacturing process of high-end devices of the type.

Description

technical field [0001] The invention relates to the technical field of precision measurement, in particular to a method and a device for simultaneously detecting the surface shape and thickness distribution of the inner and outer walls of a thin-walled rotary body. Background technique [0002] Thin-walled shells of revolution refer to shell-shaped rotationally symmetrical elements whose thickness is significantly smaller than their characteristic dimensions, such as conformal fairings and spherical fairings applied to aircraft such as missiles, and hemispherical gyro resonance used in inertial navigation of navigation equipment child and so on. This type of device has become the core optical device in the field of next-generation aerospace equipment and inertial navigation due to its excellent aerodynamic performance and functional accuracy. The shape, quality and thickness distribution uniformity of the inner and outer walls directly determine its operational performance. ...

AI Technical Summary

Problems solved by technology

The present invention drives the spectrum confocal measuring head to perform profiling scanning on the thin-walled shell type rotary body through the linkage of two turntables and a linear motion axis, which can overcome the high aspect ratio, high aspect ratio and large For the detection of complex features such as steepness, combined with the m

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