Chute machining method for inner wall face of case of aero-engine

Abstract

The invention discloses a chute machining method for the inner wall face of a case of an aero-engine. The method comprises the following steps that a, a five-axis numerical control machine tool is selected as machining equipment; b, the tool assembly manner is improved, a through-connection angle head is used for carrying out through connection on a tool on a machine tool spindle, and the machine tool spindle stretching into the case in the axial direction of the case and the tool for machining the inner wall face of the case in the radial direction of the case are formed; c, the tool is selected, the diameter of a handle of the tool ranges from phi6 to phi10, the diameter of a cutting part ranges from phi4 to phi7, the length-diameter ratio of the tool ranges from 1:7 to 1:10, and therefore tool vibration brought by through connection of the tool in the machining process is reduced; d, a chute machining process path is selected, and a circulation machining manner is adopted so as to guarantee the surface roughness of chutes and improve the machining efficiency; and e, all chute design positions on the inner wall face of the case are machined, and the formed case is obtained. The requirements for the sizes and the roughness of the chutes are guaranteed; and tool consumption is greatly reduced, and the machining cost is reduced.

Description

technical field [0001] The invention relates to the technical field of aero-engine processing, in particular to a method for processing inclined grooves on the inner wall of a casing of an aero-engine. Background technique [0002] With the development of aerospace technology, the performance requirements of the new generation of aero-engines are getting higher and higher, and the structure and profile of parts are becoming more and more complex. The spindle and tool of the CNC machine tool cannot directly go deep into the inner cavity of the part for processing, and the surface of the inner cavity of the part can only be processed by EDM. The electrode manufacturing is difficult, the processing time is long, and the size is not easy to control. The outer ring of the first-stage stator of an aero-engine has 114 inclined slots in the inner ring. It takes 76 hours to process one part by EDM. The processing efficiency is extremely low, which seriously affects the progress of sc...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a chute processing method for the inner wall of the casing of an aero-engine to solve the problem that the existing ordinary machine tools and numerical control machine tools cannot process the inner wall of the casing; the method of electric spark processing is difficult to manufacture electrodes, and the processing Long time, difficult to control the technical problems of processing size

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