Method for machining arc-tooth tenon blade of aircraft engine gas compressor

Abstract

The invention belongs to machining technologies of blades of aircraft engine gas compressors, and provides a method for machining an arc-tooth tenon blade of an aircraft engine gas compressor. The method includes the steps that a blade blank with a root process boss and a blade tip process boss is clamped to a numerical control milling machine, and rough milling is conducted on the intake side and the exhaust side of the blade; the blade subjected to the rough milling is clamped in a positioning casting fixture and cast through low-melting-point alloy, and the outline of the cast blade is a cuboid; rough milling is conducted on the cuboid blade obtained after being clamped and cast on the numerical control milling machine so that a tenon and a margin plate can be formed at the root of the blade, and the blade root process boss is removed; the tenon is subjected to finish grinding on a six-axis creep-feed grinding center to be in an arc-tooth shape; the cuboid blade is placed into a melting furnace and heated to be 180 DEG C, and is taken out after the low-melting-point alloy melts; finish grinding is conducted on the intake side and the exhaust side on a numerical control abrasive belt grinding machine by using the tenon for positioning and clamping; and the blade tip is machined on a numerical control linear cutting machine by using the tenon for positioning and clamping, and the blade tip process boss is removed.

Description

technical field [0001] The invention belongs to the processing technology of aero-engine compressor blades, and relates to the improvement of the processing method of aero-engine arc-tooth tenon blades. Background technique [0002] For a certain type of engine compressor, a kind of arc-tooth tenon blade structure, see figure 1 , The blade is composed of tenon 1, edge plate 2, blade body 3 and blade tip 5. The tenon 1 is a radial arc dovetail structure, the tenon 1 is connected to the edge plate 2 , and the edge plate 2 is connected to the blade body 3 . At present, the main steps of domestic processing of radial arc dovetail tenon blades are: use precision forging blanks, first process the inlet and exhaust edges, and then use low melting point positioning alloy package casting, then combine turning to process the tenon, and milling to process the blade tip , and finally melt the low melting point positioning alloy. The main disadvantages of this processing method are: 1...

AI Technical Summary

Problems solved by technology

The main disadvantages of this processing method are: 1) The profile tolerance requirements of the tenon head are relatively strict, the consistency of the circular arc tooth tenon head processed by combined turning is poor, it is difficult to guarantee the tenon head profile tolerance, the tool marks left after turning are more obvious, and the tenon head The quality of the machined surface is poor; 2) The commissioning cycle of the combined turning arc tooth tenon is long and the processing efficiency is low

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