A gap assembly method based on the installation of inertial group platform in instrument cabin

Abstract

The invention provides a gap assembly method based on instrument compartment inertial measurement unit platform mounting. The gap assembly method comprises the following steps that (a) a K-shaped beamis placed on a middle frame, and the middle frame is placed on a riveting assembly fixture platform; (b) the inertial measurement unit platform is placed on the middle frame and the K-shaped beam, and the inertial measurement unit platform and the locating fixture are fastened; (c) a gap A between the inertial measurement unit platform and the middle frame and a gap A between the inertial measurement unit platform and the K-shaped beam are measured; (d) gaskets are added between the inertial measurement unit platform and the middle frame and between the inertial measurement unit platform andthe K-shaped beam; (e) the inertial measurement unit platform is in threaded connection with the middle frame and the K-shaped beam; (f) a bolt between the inertial measurement unit platform and the locating fixture is loosened, and a gap B at the threaded connection part of the bolt between the inertial measurement unit platform and the locating fixture is measured; and (g) gasket adding adjustment is carried out at the parts where the bolts are connected between the inertial measurement unit platform and the middle frame and between the inertial measurement unit platform and the K-shaped beam for the second time. The one-time assembly success rate is increased, the assembly efficiency of the inertial measurement unit platform is improved, the assembly quality of the inertial measurementunit platform is ensured, and the inertial measurement unit platform meets the design and operational requirements after being assembled.

Description

technical field [0001] The invention belongs to a component assembly method, in particular to a gap assembly method based on the installation of an inertial group platform in an instrument cabin. Background technique [0002] The instrument cabin is located between the last-stage engine of the rocket body and the upper-stage payload. In addition to transmitting the rocket propulsion, it also transmits the pulsating load of the rocket engine. It plays an important role in carrying and connecting the entire rocket body structure. An important part of many sections. The structure of the instrument cabin is usually a cylindrical or truncated conical shell structure. The internal instrument bracket, instrument honeycomb panel, instrument inertial group platform and other components carry various instruments and equipment, and these equipment play an important role in the communication and navigation of the launch vehicle. , Controlling effect. [0003] The inertial group platfo...

AI Technical Summary

Problems solved by technology

The inertial group platform adopts tooling positioning. Due to the different ductility of the materials of the two connecting parts of the inertial group platform and the positioning tooling, the inertial group platform and the positioning tooling will undergo different degrees of stress and deformation after the screw connection is tightened, resulting in the assembly of the inertial group platform and the K-beam. After removing the tooling, the stress between the inertial group platform and the positioning tooling is released, the surface of the platform will warp to varying degrees, and the flatness of the inertial group platform is difficult to guarantee

As a result, it is more difficult to ensure the parallelism between the upper end surface of the inertial group platform and the bottom surface of the lower end frame of the shell

This kind of flatness and parallelism will directly affect the normal use of instruments and equipment, gyro devices, and the control of the flight attitude of the rocket body, which in turn will affect the success rate of rocket launches.

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