Method for processing integral casing of engine

Abstract

The invention relates to a method for processing an integral casing of an engine, which is characterized by mainly comprising the steps of: inspecting blanks, carrying out rough turning on inner and outer shapes of the casing, carrying out numerical control milling on the outer shape of the casing and engraving lines for trisection, carrying out wire cutting and trisecting on the casing on the basis of the trisection lines, carrying out aging and stress-relieving treatments, grinding upper and lower end faces and processing two dowel holes in the lower end face, carrying out blade slot treatment and processing a faying surface and a flange hole, carrying out finish milling on the outer shape of the casing, carrying out the aging treatment again, assembling the trisected modules and establishing a benchmark again, carrying out finish turning on the inner surface of the casing, disassembling the modules of the casing, carrying out the finish milling on blades and assembling the modules of the casing, wherein a fillet variable-axis plunge milling method, a blade spacing processing method and a flexible supporting method are adopted in the blade finish milling process. The method provided by the invention has the advantages: the technical process is simple; the produced integral casing has higher precision; the advantages of good consistency, little deformation and high efficiencyare provided in the blade processing; the technical problem that the integral casing is difficult in numerical control is solved by means of the trisection processing method; and the process method can also be used for the development of multilevel integral casings.

Description

technical field [0001] The invention relates to a processing method of a mechanical part, in particular to a processing method of a blade casing of a high-speed engine, in particular to a processing method of an integral casing of an engine. Background technique [0002] At present, with the improvement of engine requirements and performance, the design of the engine rectifier casing is more and more inclined to the overall structure design, the overall structure has fewer connecting elements, the number of parts is reduced from the original 100-200 to 10-20, and the quality is greatly improved. Relief, significantly improved reliability, can greatly improve the performance of the engine. The overall structural design of the casing brings many difficulties to its manufacture. Compared with the integral rotor, the processing technology of the integral casing is more complicated. Because the blades of the integral casing are distributed inside the casing, the accessibility of ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing processing method is difficult to meet the processing requirements of the overall casing, and the processing accuracy is not high and the efficiency is not high, and to invent a method for processing the overall casing of the engine with good consistency, small deformation and high efficiency.

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