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某发动机火焰筒外环为整体结构有别于其它型号发动机的分段焊接式火焰筒,它5段型面呈锥度组成的薄壁环形件,沿型面壁厚1.2±0.05。在零件5段外壁上分布7000余个φ1.2～φ1.8径向小孔及大孔。零件的毛料重量36.18kg(ρ=8.28g/cm3),成品零件净重6.7kg,该材料为变形高温合金GH3536,由于其难切削特性且该零件较高、壁厚极薄,数控车加工时易让刀产生振纹,造成零件质量超差。本文从生产实际情况出发,从工艺路线、切削参数、加工方法等方面进行分析及试验研究,为新型号薄壁机匣类整体环形火焰筒的研制提供可借鉴的工艺方法。
The outer ring of an engine flame tube is a segmented welded flame tube which is different from other types of engines in its overall structure. Its 5-segment profile is a thin-walled ring with a taper of 1.2 ± 0.05 along the wall thickness. In the five sections of the outer wall of the distribution of more than 7,000 φ1.2 ~ φ1.8 radial holes and large holes. Parts of the gross weight of 36.18kg (ρ = 8.28g / cm3), finished parts net weight 6.7kg, the material is deformed superalloy GH3536, due to its difficult cutting characteristics and the high parts, wall thickness is extremely thin, CNC machining easy Let the knife vibration, resulting in poor quality parts. In this paper, starting from the actual production situation, from the process route, cutting parameters, processing methods and other aspects of analysis and experimental study for the new type of thin-walled casing type annular flame tube research provides a reference technology.