Engineering Ceramic And Its Composite Components Processing Pilot Study

Engineering ceramics and composite components are widely used in tanks vehicles and other military vehicles for its excellent protection performance and the light weight. Usually, secondary processing is necessary for the composite components before assembling, remarkably which needs a large number of drilling and slotting process. This thesis presented an intensive study on machining technologies of engineering ceramics and composite components, thus providing technical supports for the application of these materials in special vehicles.Based on analyzing the characteristic of engineering ceramic and fiber composite, the diamond trepanning drill is selected. The production processes of sintering, electroplating and brazing diamond tools are compared and analyzed respectively, and the structure, main capability parameters of diamond trepanning drill are also researched and ascertained; Combining the physical and mechanical properties of ceramic and fiber composite and through SEM observations of drilling holes surfaces, the machining mechanisms and removal mechanisms are analyzed and researched.With regarding the machining efficiency as the major index, through the orthogonal tests, the influence regularities of various factors using of brazing diamond trepanning drill on the machining efficiency are analyzed, then parameters are optimized and get the best combination of factor level. At the same time, comparative life test between the sintering and brazing diamond trepanning drill is done. Three different sets of the production process of diamond trepanning drilling are used to drilling the SiC engineering ceramics and it provides an experimental basis to further processing of SiC engineering ceramics.According to drilling, milling special requirements, using the sintered diamond trepanning drill, brazing rod mill and milling cutter to mill the engineering ceramics and composite materials for milling experimental study. The results show that the brazing diamond milling cutter is more suitable for milling of such materials. At the same time, it also lays the foundation for further milling of SiC engineering ceramics.