Method for directly machining turbine blade air film irregular holes through laser

A turbine blade and laser direct technology, applied in laser welding equipment, metal processing equipment, welding equipment, etc., can solve the problems of hole position and angle deviation, poor surface shape consistency of special-shaped holes, and low processing efficiency

Active Publication Date: 2012-08-01
BEIJING AERONAUTICAL MFG TECH RES INST
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Problems solved by technology

The most direct problem brought by this process is the hole position and angle deviation caused by secondary clamping or secondary positioning, and the loss of forming electrode EDM leads to poor surface shape consistency of special-shaped holes. Figure II , and the large amount of processing and consumption of the formed electrode also makes the processing cost high, and what is more serious is that the processing efficiency of this method is too low

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  • Method for directly machining turbine blade air film irregular holes through laser
  • Method for directly machining turbine blade air film irregular holes through laser
  • Method for directly machining turbine blade air film irregular holes through laser

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Embodiment Construction

[0027] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments:

[0028] See attached Figure 3-7 As shown, the method for directly processing the special-shaped hole of the turbine blade air film by this kind of laser is characterized in that: the special-shaped hole processed by the method is an oblique hole, and the shape of the entrance (1) of the special-shaped hole on the blade surface is the two waists of an equilateral trapezoid (4) It is tangent to the cylindrical through hole (2), and the three-dimensional shape of the special-shaped hole is a funnel-shaped trapezoid (large on the top and small on the bottom) and the cylindrical through hole (2) is connected with a smooth transition inside, and the hole exit is still for round holes.

[0029] The steps of this method are:

[0030] (1) An eight-axis five-link CNC laser processing machine tool equipped with a two-dimensional numer...

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Abstract

The invention relates to a method for directly machining turbine blade air film irregular holes through laser. Core content of the method includes utilizing characteristics of a two-dimensional numerical control rotation laser machining head and applying a real time control protocol (RTCP) function of a multi-shaft numerical control laser machine configured with the two-dimensional machining head, namely rotating function around the cutter central point, and achieving direct automatic machining of once clamping and laser location of the irregular holes (including hopper-shaped inlets and cylindrical outlets) inclined on the surface of the material. The method overcomes the shortcoming of the prior secondary machining mode. The method conducts experimental verification, obviously improves efficiency and accuracy for machining the irregular holes and has practical conditions. The method is not only applied to aircraft engine manufacture but also popularized and applied to civil products like gas turbines.

Description

technical field [0001] This patent relates to a method for directly processing special-shaped holes in the gas film of turbine blades by laser, which belongs to the technical field of laser material processing. Background technique [0002] The adoption of special-shaped holes with approximately trapezoidal inlets in the film cooling structure design of aero-engine turbine guide vanes will significantly increase the film cooling effect. At present, a certain type of aero-engine turbine I-stage guide vane in China also uses such special-shaped holes. See the attached Figure 1 . [0003] At present, this kind of gas film hole processing adopts the secondary processing technology. Firstly, laser or electric discharge is used to process the cylindrical through hole, and then re-clamping, positioning or replacing the processing head for secondary positioning, and the trapezoidal body is processed by EDM electrodes ( or funnel-shaped) entrance. The most direct problem brought by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/38B23K26/08B23K26/382
Inventor 张晓兵陈新松张晓鹏焦佳能
Owner BEIJING AERONAUTICAL MFG TECH RES INST
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