Process method for precisely machining piston rod part of aero-engine actuator cylinder

Abstract

The invention discloses a process method for precisely machining a piston rod part of an aero-engine actuator cylinder, and belongs to the technical field of aero-engine actuator cylinders. The process method for precision machining of the piston rod part of the aero-engine actuator cylinder comprises the following steps that S1, the piston rod part is roughly turned, a turning tool blade is adopted for turning the outer circle of the piston rod part, the rotating speed of a lathe spindle is 1200 r / min, the feeding amount is 0.1 mm / r, and the back engagement of the cutting edge is 0.2 mm; S2, the piston rod part is subjected to finish turning, the turning tool blade is adopted for turning the outer circle of the piston rod part, the rotating speed of the lathe spindle is 2,000 r / min, the feeding amount is 0.5 mm / r, and the back engagement of the cutting edge is 0 mm; and S3, the piston rod part is machined through Hauck energy, an oblique line feeding mode is adopted, the rotating speed of the lathe spindle ranges from 800 r / min to 1000 r / min, the feeding amount ranges from 0.2 mm / r to 0.25 mm / r, and the back engagement of the cutting edge is 0.4 mm. According to the process method for precision machining of the piston rod part of the aero-engine actuator cylinder, mirror surface machining of the piston rod part can be achieved, and the use reliability and service life of a piston and assemblies are improved.

Description

technical field [0001] The invention relates to the technical field of aero-engine actuators, in particular to a process method for precision machining of piston rods of aero-engine actuators. Background technique [0002] The actuator assembly of a certain type of aero-engine is installed in the high-pressure compressor assembly of the engine, and is connected with the adjustable blade through the control bracket assembly, such as figure 1 As shown, the position and dimensional tolerance requirements of this part are relatively strict, and the steering of the blade is controlled by the transmission of the actuator, so it is very important to ensure the surface quality of the piston in the actuator. [0003] The main processing procedures of the piston rod of the actuator are: rough turning the outer circular end face - fine turning the outer circular end face - grinding - polishing the outer circle, wherein the rough turning and finishing turning are processed on the CNC la...

AI Technical Summary

Problems solved by technology

There will be ring-shaped processing lines on the surface after turning and grinding, and traditional processing methods such as polishing cannot completely remove the lines. The surface roughness limit that this method can achieve is Ra0.2μm, which cannot further improve the surface quality economically

During the long-term use of the engine, the above-mentioned shortcomings of the piston will cause the wear of the rubber ring and cylinder in the assembly, and even the assembly will be scrapped

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