Aero-engine blisk annular cutter machining method based on control line

Abstract

The invention provides an aero-engine blisk annular cutter machining method based on a control line, and relates to the field of numerical control machining. By means of the control line, the cutter location point and the cutter-axis vector of an annular cutter for cutting blades of a blisk are calculated, the milling cutter location track of the blisk is planned, and the method is applied to blisk machining. According to the method, cutter path planning of blisk channel annular cutter four-axis machining based on the control line is completed, and the control line method is applied to annularcutter machining. The method remarkably improves the machining surface quality of the blisk, improves the machining efficiency and reduces working hours and the machining cost; besides, the service life of the cutter is prolonged, so that it is possible that the cutter completes machining of the surface of one blade of a large-size fan blisk before excessive abrasion, and the phenomenon that cutter connection marks are obvious due to partitioned machining is avoided.

Description

technical field [0001] The invention relates to the field of numerical control machining, in particular to a method for machining an annular cutter of an integral blisk. Background technique [0002] The low-pressure compressor fan and high-pressure compressor rotor of the new high-thrust-ratio high-performance aero-engine generally adopt an open blisk structure. The number of parts is reduced, the engine structure is greatly simplified, and the weight is reduced. Therefore, the overall blisk structure has been widely used in the aviation field. However, the overall blisk has technical characteristics such as complex structure, poor opening, thin blades, and difficult processing deformation control, which brings great difficulties to the processing of the blisk, mainly in the following aspects: (1) complex structure, open The openness is poor, the direction of the tool axis is difficult to determine, and the programming of NC machining is difficult. Most of the blisk blade...

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Problems solved by technology

[0006] In order to overcome the disadvantages of complex operation process, low processing quality and low efficiency in the prior art, the present invention proposes a method for machining the blisk of an aero-engine with a circular knife based on the control line, and uses the control line to calculate the cutting of the blisk with the circular knife The tool position point and tool axis vector of the blade, plan the milling tool trajectory of the blisk, and apply it to the processing of the whole blisk

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