Technical Analysis And Machining Process Of Hydraulic Actuating Cylinder

With the development of aviation engine technology, vector nozzle engines are more and more used in aircraft manufacturing technology, one of the most important and critical actuators called Large hydraulic actuating cylinder is a key executive element on high power vector nozzle of aircraft engine. Mastering and applying the processing technology of large cylinder and stable the processing quality have become an integral part of mastering the vector nozzle engine technology, all of the world are actively developing the technology. Development of technology research for large hydraulic actuating cylinder has important practical significance and engineering application value on promoting the research of high-power vector jet engine.Based on the comparative analysis of domestic and foreign advanced processing technology of vector nozzle hydraulic actuator assembly, the thesis analyzes the structure, principle and form of domestic hydraulic actuator assembly. Key components which affect the assembly have been determined and the machining process have been made from semifinished product to the final goods. For alloy actuator cylinder existing process can not meet the design requirements,honing process has been used. A reasonable choice of parameters, honing stone and process parameters have been chosen in honing process. Whatmore, special honing tools have been made in machining process of the actuators whicn have blind holes. Special honing stones have been made in form of different hardness in one pieces in order to solve the bottleneck of blind holes.Thanks to the use of short stone technology solution, the quality of the blind holes cylinders have been largly improved. Through analysis gun chip morphology, giving a reasonable form of gun drill, identified processing parameters and reasonable tool optimal form of gun drilling has been chosen to slove the problem of deep holes in Screw-nut.The study results and developed processes have improved the manufacturing quality of the vectoring nozzle hydraulic actuating cylinder.