Blisk manufacturing method based on 3D (three-dimensional) printing and electric spark finishing

Abstract

The invention discloses a blisk manufacturing method based on 3D (three-dimensional) printing and electric spark finishing. The blisk manufacturing method includes: 1) manufacturing a wheel hub of a blisk, washing the wheel hub of the blisk prior to positioning and fixing the wheel hub on a numerical control table; 2) generating a slicing file; 3) manufacturing a blisk blank on the numerical control table by 3D printing according to the slicing file; 4) subjecting the blisk blank to hot isostatic pressing; 5) measuring a practical three-dimensional model of the blisk blank; 6) acquiring the accuracy error and deformation amount between the practical three-dimensional model of the blisk blank and a target three-dimensional model of the blisk; 7) determining spark machining allowance according to the accuracy error and the deformation amount; 8) subjecting the blisk bland to spark machining according to the spark machining allowance so as to obtain a blisk sample; 9) removing a fused layer on the surface of the blisk sample and grinding the blisk sample to obtain the blisk. The blisk manufacturing method based on 3D printing and electric spark finishing has the advantages of capability of blisk manufacturing, material saving and high machining precision.

Description

Technical field [0001] The invention belongs to the technical field of 3D printing integral blisks, and is a method for preparing integral blisks, in particular to a method for preparing integral blisks based on 3D printing and electric spark finishing. Background technique [0002] The integral blisk is the core component of the new generation of high-performance aero-engines to achieve structural innovation and technological leapfrogging. Compared with the original blisk separation structure, the blisk is produced as an integral part, eliminating the need for traditional blisk connections. Tenon, tongue and groove and locking device, etc., reduce the weight of the structure and parts, improve the rigidity and balance accuracy of the blisk, avoid the air loss of the tongue and groove, improve the aerodynamic efficiency, greatly simplify the engine structure, and facilitate extension The service life of the engine, and the improvement of the engine's thrust-to-weight ratio and re...

AI Technical Summary

Problems solved by technology

[0003] Corresponding to the many advantages of the blisk, due to the integration of the blisk, the structure of the blisk is also very complicated, the channel opening is poor, the blade is thin, the bending is large, and it is easy to deform. At the same time, its manufacturing material is mainly made of titanium. High-performance metal materials such as alloys and high-temperature alloys and advanced composite materials such as titanium-based and titanium-aluminum compounds make the overall comprehensive manufacturing technology of the blisk a difficult problem in the industry. method, the manufacturing cycle is longer, and the amount of mechanical processing of the material is large, the macroscopic cutting force will cause the vibration of the thin-walled blade during the processing, resulting in burrs and grooves on the processed surface