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Machining method for blade tip length of fan blade

A technology of fan blades and processing methods, applied in metal processing equipment, metal processing machinery parts, manufacturing tools, etc., can solve the problems of reducing output thrust, size, large spread, and air leakage

Pending Publication Date: 2022-08-02
CHINA HANGFA GUIZHOU LIYANG AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The fan rotor blade is the key component for the airflow introduced by the aero-engine. The size and aspect ratio of the blade are relatively large; the gap between the fan blade tip and the inner wall of the casing is very critical. The blade rotates at a high speed during operation, and the smaller the gap is, the higher the air intake efficiency of the engine is. , the better the thrust performance of the engine; the larger the gap, there will be air leakage in the air flow field of the engine, which will seriously reduce the working efficiency of the core machine of the engine and greatly reduce the output thrust

Method used

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  • Machining method for blade tip length of fan blade
  • Machining method for blade tip length of fan blade
  • Machining method for blade tip length of fan blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] like Figure 4 As shown, the method in this embodiment is suitable for processing the blade tip length of the small-sized fan blade 4 . When the blade tips of the fan blades 4 are processed by grinding, a plurality of fan blades 4 are assembled on the fan integral mounting plate 5, and then the fan integral mounting plate 5 is installed on the grinding machine spindle 3 of the high-precision cylindrical grinder 1, The other end of the fan integral mounting plate 5 is pressed by the tailstock 6, and the plurality of fan blades 4 rotate with the grinding machine spindle 3 as the rotation axis. Finally, the grinding wheel 2 is used to grind the blade tip length of the fan blades 4.

Embodiment 2

[0026] like figure 1 , figure 2 , image 3 and Figure 5 As shown, the processing method in this embodiment is suitable for processing the tip length of the large-sized fan blade 4 . During processing, use a three-axis or four-axis vertical CNC milling machine with a flat worktable, and fix the fixture corresponding to the fan blade 4 on the machine worktable 9 and align it. Using a large-diameter cylindrical cutter, milling is performed using the side edge 13 of the cutter.

[0027] The tenon of the fan blade 4 is used for positioning. First, the tenon of the fan blade 4 is loaded into the clamp chuck 10 for clamping (the chuck 10 is a conventional tenon clamp), and then the pressure block 7 is used to press the blade tip position. When the fan blade 4 is clamped on the support block 8 by means of positioning, the machined surface 15 of the blade tip is parallel to the main shaft of the machine tool; The side edge 13 can completely cover the machined surface 15 of the b...

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Abstract

The invention discloses a machining method for the blade tip length of a fan blade. The machining method comprises the step of grinding or milling the blade tip of the fan blade. When grinding is adopted, a fan overall installation disc is coaxially installed on a main shaft of the cylindrical grinding machine to serve as a clamp, fan blades are distributed in the circumferential direction of the fan overall installation disc, the blade tips of the fan blades rotate at the same time with the main shaft of the cylindrical grinding machine as the rotating axis, and the blade tips of the fan blades are ground through a grinding wheel of the cylindrical grinding machine. When milling is adopted, a vertical numerical control milling machine with a plane workbench is selected, and the blade tip of the fan blade is milled along the theoretical contour line of the blade tip through the side edge of a column milling cutter. The blade tip length of the fan blade is accurately controlled through different machining modes, and different machining requirements are met.

Description

technical field [0001] The invention relates to a method for processing the blade tip length of a fan blade, and belongs to the technical field of mechanical processing. Background technique [0002] The fan rotor blade is the key component of the aero-engine to introduce airflow. The size and chord of the blade are relatively large; the gap between the fan blade tip and the inner wall of the casing is extremely critical. The blade rotates at high speed during operation. The smaller the gap, the higher the intake efficiency of the engine. , the better the thrust performance of the engine; the larger the gap, there will be air leakage in the engine air flow field, which will seriously reduce the working efficiency of the core engine of the engine and greatly reduce the output thrust. At the same time, the gap should not be too small. It must be ensured that the blade tip is not allowed to rub against the inner wall of the casing to prevent the blade from rotating at high spee...

Claims

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Application Information

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IPC IPC(8): B23C3/00B23Q3/06B23Q17/20B24B19/14B24B41/06B24B47/12
CPCB23C3/00B23Q3/063B23Q17/20B24B19/14B24B41/06B24B47/12Y02E10/72
Inventor 邵嘉鑫殷明秦凯凯都书博焦磊郑蔚
Owner CHINA HANGFA GUIZHOU LIYANG AVIATION POWER CO LTD