A Machining and Positioning Method for Cooling Gas Film Holes of Turbine Blades
A technology of turbine blade and positioning method, which is applied in metal processing equipment, manufacturing tools, welding equipment and other directions, can solve the problems of unstable quality and low geometric accuracy, and achieves simple processing method, wide promotion and application prospects, and good processing effect. Effect
Active Publication Date: 2022-02-11
星控激光科技(上海)有限公司
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Problems solved by technology
In view of the problems of low geometric accuracy and unstable quality in the machining process of air film holes in turbine blades, it is imminent to independently design and develop high-performance air film hole processing and positioning methods
Method used
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Embodiment 1
[0049] 1) According to the UG model of the actual blade, the theoretical three-dimensional coordinates and depths of the three rows of 54 air film holes in the world coordinate system are obtained on the leading edge of the blade
[0050] See attached Figure 1 ~ Figure 2 According to the UG model of the actual blade, the theoretical three-dimensional coordinates and depths of the three rows of 54 air film holes in the world coordinate system of the blade leading edge are obtained.
[0051] See attached image 3 , the three-dimensional coordinates of the gas film hole theory are extracted by converting the contour curve of the gas film hole into a point cloud. The number of point clouds is large enough to ensure the accuracy of the measured coordinates. The three-dimensional coordinate point of .
[0052] See attached Figure 4 , fit the contour curve of the above point cloud processing to obtain a space-like elliptic curve.
[0053] See attached Figure 5 , connect the m...
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The invention discloses a method for precise processing and positioning of air film holes for cooling turbine blades. Point” point cloud processing to obtain the coordinates of the center point, and fit it with the theoretical design coordinates of the air film hole in the theoretical model, calculate the coordinate error and correct it, and obtain a more accurate processing location of the air film hole. Compared with the prior art, the present invention has the advantages of simple processing method, high processing and positioning accuracy and good quality, especially in the processing and positioning of air film cooling holes of turbine blades of aero-engines, a good processing effect has been achieved, and the error of casting parts has been omitted Calibration, clamping and positioning error correction, and error correction including blade movement and deformation during small hole processing can further improve the processing quality and work efficiency of gas film holes. It has strong practicability and has a wide range of promotion and application prospects.
Description
technical field [0001] The invention relates to the technical field of turbine blade manufacturing, in particular to a processing and positioning method for cooling air film holes of a turbine blade. Background technique [0002] The air film holes on the turbine blades have the characteristics of a large number and complex spatial angles. The film cooling efficiency is the response of material, geometry and other parameters and their coupling effects in the high temperature and high pressure three-dimensional unsteady flow field, which is related to the shape and position of the air film holes. The parameters are closely related. Therefore, it is very important to ensure the shape and position accuracy of the blade air film hole to improve the cooling efficiency and engine energy efficiency. At present, my country's air film hole processing and positioning technology is very immature and still in the early stage of exploration, mainly because the blade processing technolog...
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IPC IPC(8): B23K26/382B23K26/70
CPCB23K26/382B23K26/70
Inventor 曹凯强蒋其麟陈龙贾天卿孙真荣
Owner 星控激光科技(上海)有限公司