Time Study to Compare Different Operation Cycles Included in Manufacturing of Components with Cylindrical Bores

While considering the manufacturing of any components of aerospace industry it is very important to reduce the time associated with its production with minimum cost and high quality. The manufacturing of Electro Hydraulic Servo Valve (EHSV) considered for this work is a two stage electrically operated hydraulic valve, in which the output flow is proportional to the input current. Here investigated on both theoretical and practical aspects of using different processes involved in the production of EHSV. The material used for EHSV is SS 440 C. This investigation gave me a complete idea about the problems related to different machining operation cycles associated with the manufacturing of EHSV, especially the problems related to the wire electric discharge machining (WEDM). The main problems associated with WEDM increased time for manufacturing cylindrical bores and high costs associated with its production can only be eliminated by replacing the existing WEDM process with suitable process which is cost effective, time saving and produce components with better quality. For this purpose TiN coated carbide reamer is the best option to overcome the above mentioned problems for the manufacturing of cylindrical bores. Time study need to be performed on both existing operation cycle and proposed operation cycle in order to get the complete idea about the total time associated with the manufacturing of cylindrical bores in EHSV valve body.