粉末冶金篦齿盘光整加工技术研究

Research on Powder Labyrinth Disc Finishing Technology

篦齿盘位于高压压气机转子的末端,工况条件相对较差,特别是均压孔边静应力高,在一定振动应力作用下,均压孔边易产生疲劳裂纹。为保证零件在使用温度范围内要有尽可能高的疲劳性能,篦齿盘采用粉末冶金高温合金FGH97。本文通过粉末冶金篦齿盘光整加工技术研究,改变传统的手工抛光的工艺方法,有效地去除毛刺、刀痕波纹,降低表面粗糙度值,改善表面应力状态,提高零件加工表面质量。

Labyrinth disc is at the end of the high pressure compressor rotor, working conditions are poor, especially the pressure hole edge stress is high, the pressure hole is easy to produce fatigue crack with the vibration stress. In order to ensure the parts in the use temperature range have a fatigue performance as high as possible, it is very important to improve the quality of the machined surface. In this paper, the finishing technology of powder labyrinth disc is studied, the traditional manual polishing process is changed, which can remove the burr and, cut corrugate, reduce the surface roughness value, improve the surface stress state, effectively improve the physical mechanical parts surface properties.