Design And Research Of The Twin-facing Lathe And The Vibration Suppressing Device In Machining Compressor Disk

Compressor disk is one of the crucial components making up aero engine compressors. It is a significant procedure to turning the thin walled webs in the processes of machining a compressor disk. Compressor disks’ thin walled webs are easily distorted and vibrated on the consequence of cutting forces because of its large diameter and small thickness. The distortion and vibration severely constraints the geometric accuracy and production efficiency in machining compressor disk’s thin walled webs, and these problems needs to be solved urgently.On the base of well learned the construction, materials and the processes of machining the compressor disk, this dissertation put forward the method of twin-facing turning to deal with the problem of distortion and propose the method of varying the damping of machining system to tackle with the problem of vibration when machining the compressor disks’ webs.The dissertation completed the overall design of the twin-facing lathe, including the development of the performance specifications, overall layout, motion style, the supporting system of the spindle, the feed system and the selection of the NC system and the research of the twin-facing turning characteristics. The dissertation also finished the development of the feed servo system, including the parameters design of the sliding rail pairs, selection of the ball screws and the servo motors, the supporting way of the ball screws, the plan of the lubrication system, the design of the feedback system and the calculation of the acceleration and deceleration capability of the feed servo system. Besides, the dissertation realized the above design in engineering, including the engineering drawings, following the manufacturing of the components, the installation and commissioning of the devices, the test of the machine’s accuracy. The test results show that the accuracy of the twin-facing lathe fully meets the requirements, which lays a solid foundation for the following research of the twin-facing turning process.This paper analyzes the vibration phenomenon when machining the compressor disks’ webs and investigates the realization method of the variable damping to suppress the vibration. The dissertation also finished the overall design of the variable damping device.