A Contour Quality Control Method for Aeroengine Blade Machining Degradation

Abstract

The invention provides a quality control method for a degraded profile in a processing course of a blade of an aviation engine, and is used for solving the problem that profile quality control precision is low in an existing processing course of the blade of the aviation engine. The method comprises the following implementation steps: establishing a coupling prediction model for degraded profile error accumulation in the multi-stage processing course of the blade of the aviation engine; carrying out least square regression on the coupling prediction model for degraded profile error accumulation in the multi-stage processing course of the blade of the aviation engine; carrying out self-closing treatment on profile errors in the processing course of the blade of the engine by using a methodfor predicting residual errors ahead of time; carrying out least square regression on a residual equation of a node process k in the processing course of the blade of the engine; establishing a T2 control chart monitoring model based on clusters; and acquiring a degraded profile quality control result in the processing course of the blade of the aviation engine. The profile quality control precision of the processing course of the blade of the engine can be improved, and the method can be applied to profile quality control in the processing course of the blade of the engine in the field of aviation industry.

Description

Technical field [0001] The invention belongs to the technical field of advanced manufacturing and automation, and specifically relates to a contour quality control method for degraded aeroengine blade processing process, and can be used for contour quality control of the engine blade processing process in the field of aviation industry. Background technique [0002] Aero-engine blades are difficult to machine, complex in profile, difficult to guarantee contour accuracy, and difficult to control errors. Such parts usually use nickel-based superalloys, titanium alloys and other materials that are difficult to process. In the multi-source and multi-process machining process, there are many and complex error sources, the workpiece is volatile, and the structure is easy to chatter. [0003] In the existing processing quality control methods, by establishing models, designing control limits, and combining with control charts to achieve processing quality control, it can help improve blad...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects in the above-mentioned prior art, and propose a method for controlling the contour quality of the degradation of the machining process of the aero-engine blade, which is used to solve the problem of low precision of the contour quality control in the machining process of the aero-engine blade

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