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Method for accurately positioning interference air film holes in electric sparking of integrally-cast linked blades

A precise positioning and blade positioning technology, applied in electric machining equipment, metal processing equipment, manufacturing tools, etc., can solve problems such as EDM process limitations, low positioning accuracy of interference gas film holes, and contour deviations

Active Publication Date: 2020-12-18
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for precise positioning of the interfering air film holes in integrally cast and connected blades by electric discharge machining, which can solve the problem that the integrally cast double-connected blades affect the positioning of the interfering air film holes due to the problems of contour deviation, large positioning errors and limitations of the EDM process The problem of low precision

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  • Method for accurately positioning interference air film holes in electric sparking of integrally-cast linked blades
  • Method for accurately positioning interference air film holes in electric sparking of integrally-cast linked blades
  • Method for accurately positioning interference air film holes in electric sparking of integrally-cast linked blades

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] Such as figure 1 , figure 2 with Figure 4 As shown, a method for precise positioning of interfering gas film holes by electric discharge machining of integrally cast and connected blades includes the following steps:

[0028] Step 1: Establish a three-dimensional model of the integrated cast blade 11 through the UG modeling software. The integrated cast blade 11 is composed of a piece A 12 and a piece B 13. By rotating the three-dimensional model on the operation interface of the UG modeling software, measure the two-dimensional vector Angle and position, the XYZ three-dimensional space angle of the multi-row vector interference holes distributed between the A piece 12 and the B piece 13 is adjusted to a two-way space angle to reduce the difficulty of space vector positioning;

[0029] Step 2: Design the positioning device of the i...

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Abstract

The invention relates to a method for accurately positioning interference air film holes in electric sparking of integrally-cast linked blades. The method comprises the following steps of, step 1, adjusting XYZ three-way angles of interference holes into two-way or one-way angles; step 2, placing an integrally-cast linked blade 11 on the arc surface of a positioning table of a base 1 of a positioning device through a mounting plate on the integrally-cast linked blade 11, machining interference holes inside a pressure side of a blade A 12, and machining interference holes in a suction side of ablade B 13; step 3, measuring the cross section; step 4, carrying out coordinate system deviation compensation; step 5, tool setting; step 6, moving row electrodes to actual machining positions to confirm that a machining path has no interference; and step 7, replacing the row electrodes through assembling and disassembling precise replaceable electrode plates, and performing tool setting post-machining. According to the method, the problem of low interference air film hole positioning precision caused by the influence of the problems of profile deviation, large positioning error, electric spark process limitation of integrally-cast duplex blades is solved, the accurate positioning work of electric sparking machining of the interference air film holes of integrally-cast duplex blades of anew machine is successfully completed, and verification batch trial production is completed.

Description

technical field [0001] The invention belongs to the technical field of special processing, and in particular relates to a precise positioning method for electric discharge machining interference air film holes of integrally cast and connected blades. Background technique [0002] Turbine guide vanes are the key aerodynamic components of aero-engines. In recent years, in order to improve the overall performance of the engine, reduce airflow loss, and increase structural strength, the turbine guide vane family has added a double-joint integral casting structure. This blade is not only complex in casting process, but also The related processing technology is extremely difficult, and the air film hole in the shielding part between the two adjacent blades and the flow channel cannot be processed by the traditional EDM drilling method due to the narrow processing area and many interference points, such as figure 1 As shown, as well as the constraints of EDM, poor surface contour, ...

Claims

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Application Information

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IPC IPC(8): B23H1/00B23H9/14B23H11/00
CPCB23H1/00B23H11/00B23H9/14
Inventor 张文明桓恒刘丹张绍楠
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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