Machining Method of Additive and Subtractive Material Composite Manufacture of Turbine Blades

Abstract

The invention discloses a machining method for composite manufacturing of a turbine blade in additive and subtractive modes, and relates to a machining and manufacturing method for the turbine blade,in particular to a composite machining method for manufacturing the turbine blade in the additive and subtractive modes. The machining method for composite manufacturing of the turbine blade in the additive and subtractive modes comprises the steps of additive forming and subtractive machining, wherein additive forming and subtractive machining are conducted alternately and circularly. Additive forming comprises the steps that A1, integral modeling and layering are conducted; A2, local special layering is conducted; A3, the additive path is planned; and A4, single-cycle additive machining is conducted. Subtractive machining is divided into two machining types of end milling and side milling, and according to the different machining types, subtractive machining comprises the steps that B1,a machining area is divided; B2, process parameters are set; B3, local special parameters are set; and B4, single-cycle subtractive machining is conducted. Additive forming and subtractive machining are circularly repeated till the whole turbine blade is completed. The machining method for composite manufacturing of the turbine blade in the additive and subtractive modes has the characteristics that the method is novel, the process is simple and convenient, the machining precision is improved, particularly detail feature finish machining is achieved, the machining efficiency is improved, and the application range is wide, and integrates economical efficiency and practicality.

Description

technical field [0001] The processing method for manufacturing turbine blades by adding and subtracting materials in the present invention relates to a manufacturing method for turbine blades, in particular, it is a composite processing method for manufacturing turbine blades by using adding and subtracting materials. Background technique [0002] Turbine blades are important basic components in the aviation industry. At present, the traditional method of manufacturing turbine blades is precision casting. This method has the following processing problems: [0003] 1. The investment casting turbine blade is limited by the casting process, and the blade has a certain inversion angle. In order to facilitate demoulding, this will cause the shape and size of the turbine blade formed by fusion casting to be inconsistent with the design requirements; the internal details of the blade, such as inversion Features such as corners and throats cannot be finished in the later stage, and ...

AI Technical Summary

Problems solved by technology

[0003] 1. The investment casting turbine blade is limited by the casting process, and the blade has a certain inversion angle. In order to facilitate demoulding, this will cause the shape and size of the turbine blade formed by fusion casting to be inconsistent with the design requirements; the internal details of the blade, such as inversion Features such as corners and throats cannot be finished in the later stage, and these detailed features significantly affect the flow rate of the blade, making it difficult to precisely control the flow rate;

[0004] 2. Manufacturing molds and modifying molds is time-consuming and labor-intensive, which increases R&D costs;

[0005] 3. There are problems of difficult positioning and tool accessibility in the post-machining clamping of castings; due to the deviation of clamping positioning in post-machining, there are differences in the amount of material removed from each component of the additively formed part, and the size cannot be guaranteed Accuracy and surface quality; due to the high blade height of the additively formed part and the small throat size, there are tool interference problems in later machining, and there are even areas that cannot be machined

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