Development Of Special Installation Equipment System For Radome Precision Measurement And Grinding

As a key part in high speed & accurate guiding missile, radome is a revolving shaped part with complex curve generatrix and made by hard-brittle materials. Due to complicated manufacturing process, its electrical characteristics always have poor quality, and in turn make direct influence to the guidance precision of missiles.The main reasons of poor electrical characteristics quality are the error of the geometric thickness and the non-uniformity of the dielectric constant of the material. At president, in attempting satisfy the electrical characteristics requirement of radome, precision grinding techniques have been developed to machine the surface of the radome in order to compensate the electrical characteristics error by alerting the geometric thickness. In this process,firstly, the electrical characteristics parameter of radome must be measure at the electrical characteristics machine tools. And then, radome must be installed to the grinding machine tools to have a precision grinding on the unqualified surfaces. However, no matter at measurement machine tools or grinding machine tools, radome must be positioned and fixtured accurately. The grinding quantities are according to the lectrical characteristics parameter, therefore, in order to make grinding more accurate, there must be a high precision position conversion between easurement machine tools and grinding machine tools.This paper analyzed the radome electrical characteristics error compensating processes and the installation errors how to influence error compensating, and then, according to radome is a revolving shaped part with complex curve generatrix and made by hard-brittle materials. And the special structure of the easurement machine tools. A special installation system has been designed to achieve high precision installation and position conversion. The installation system has tow main parts, one is initial installation system, and the other is the positions conversion interface. The initial installation system can make radome to have initial positioning and fixturing, then, it will form a workpiece & fixture system. And then, the workpiece & fixture system can have a quickly and accurately installed at every machine tools. When the installation system had been completed, there were some tests on it, and it was used to the actual processing.