Curved surface shape regulation and control-based rolling blade front and rear edge machining curved surface reconstruction method

Abstract

The invention relates to the field of precision forming of aero-engine blades, in particular to a curved surface shape regulation and control-based rolling blade front and rear edge machining curved surface reconstruction method. The method comprises the following steps: 1, obtaining blade body profile data, close to the front edge, of a rolling blade; 2, constructing a rolling blade front edge design curved surface shape adjustment model based on the blade body profile data of the rolling blade close to the front edge; 3, solving a rolling blade front edge design curved surface shape adjustment model to obtain an optimal offset vector of a cubic grid vertex; 4, reconstructing a rolling blade front edge machining curved surface by utilizing the optimal offset vector of the vertex of the cubic grid; and 5, reconstructing a rolling blade rear edge machining curved surface according to the methods in the steps 1-4. According to the invention, rolling blade front and rear edge design curved surface shape adjusting models easy to deform and control are established, so that the deformed blade front and rear edge design curved surfaces can maintain the initial geometrical shape as much aspossible while approaching blade body molded surface measurement data, and smooth switching between the front and rear edge machining curved surfaces and the actual blade body of the rolling blade isrealized.

Description

technical field [0001] The invention relates to the field of precision forming of aero-engine blades, in particular to a method for reconstructing the curved surface of the front and rear edges of the rolled blade based on the control of the curved surface shape. Background technique [0002] The compressor blade is the core component of an aero-engine, and its forming accuracy and quality have a direct impact on the performance of the engine. At present, compressor blades of different sizes and structures adopt different forming processes. Among them, in order to reduce manufacturing costs, improve production efficiency, and obtain more excellent structural properties, small-sized high-pressure compressor stator blades generally adopt cold rolling without margin. manufacture. According to the characteristics of this process, although the airfoil profile of the blade after roll forming can meet the net shape requirements, the excess material removal of the leading and trail...

AI Technical Summary

Problems solved by technology

However, due to the shape change of the actual airfoil, the smooth transition between the reconstructed surface and the actual airfoil cannot be fully realized only by changing the spatial position of the design section line of the leading and trailing edges

In addition, the reconstruction of the processed surface through the interpolation curve requires the reconstruction of multiple front and rear edge section lines, which is time-consuming and labor-intensive, which seriously affects the efficiency of model reconstruction

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