钼钛锆合金材料特殊型腔的组合放电加工方法的研究

钼钛锆合金的耐高温和抗高温高速燃气冲刷等优点,使其被广泛应用为航天发动机控制模块的结构材料,但其高效精密加工一直是应用中的难题.因此,采用线切割及电火花(WEDM+EDM)组合放电加工的工艺,开展了钼钛锆材料固体发动机燃气阀特殊型腔加工的组合工艺研究.与传统切削加工相比,该方法具有加工精度高、表面质量好和具备加工复杂型腔的能力;与单一电火花加工相比,具有加工效率高、电极损耗小等优点.通过某型号固体发动机燃气阀的加工试验,采用组合工艺完成了燃气阀体的上下异形面型腔、阶梯异型孔、窄槽和异形盲孔等特殊型腔的高效高精度加工.

Research on Special Cavity Using a Combination of Method of WEDM and EDM

Titanium-Zirconium-Molybdenum alloy has lots of advantages. It can resistance to high-temperature, resistance to high-speed gas erosion, etc. So it is widely used as aerospace engine control module structural materials, but how to machine it in a efficiently way is a problem. In this paper, a combination of processing methods (WEDM + EDM) was mentioned to machine special cavity of solid rocket motor gas valve in TZM material. Compared with traditional machining method, the combination of processing methods has a high precision, good surface quality and process ability complex cavity capacity, and compared to a single EDM, it has high process efficiency, the electrode loss is also small. By processing of unknown type solid engine test gas valve, using a combination of the gas process is completed shaped bottom surface of the valve body cavity, high efficiency and precision machining stepped hole, narrow slots and blind holes and other special shaped cavity