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A method and device for laser shock strengthening and shape correction of welding seam of engine bifurcated tail nozzle

A laser shock strengthening and laser shock technology is applied in the field of laser shock strengthening and shape correction of the welding seam of the engine bifurcated tail nozzle, which can solve the problems of deformation of the tail nozzle, improve the strength, ensure the shape accuracy, and achieve high social and economic benefits. Effect

Active Publication Date: 2021-08-24
GUANGDONG UNIV OF TECH
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Problems solved by technology

However, the exhaust nozzle is a thin-walled part with a wall thickness of only about 0.25 mm. In the process of laser shock strengthening the weld area of ​​the exhaust nozzle, it will inevitably cause deformation of the exhaust nozzle. Therefore, the existing technology needs further improvement and perfection

Method used

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  • A method and device for laser shock strengthening and shape correction of welding seam of engine bifurcated tail nozzle
  • A method and device for laser shock strengthening and shape correction of welding seam of engine bifurcated tail nozzle
  • A method and device for laser shock strengthening and shape correction of welding seam of engine bifurcated tail nozzle

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Embodiment 1

[0046] Such as figure 2 As shown, this embodiment discloses a device for laser shock strengthening and shape correction of the welding seam of the engine bifurcated tail nozzle. The device mainly includes a complete machine control system 1, a laser 7, a laser control system 2, and a laser shock strengthening unit 8. Auxiliary lighting LED lamp group 9. Special tooling fixture for tail nozzle 13. Clamping robot 12. Clamping robot control system 3. Watering robot 14. Watering robot control system 4. Optical measuring instrument 10. Optical equipment control system 5. Three-dimensional profile scanner 11, and data acquisition system 6;

[0047] Specifically, the whole machine control system 1 is respectively connected with the laser control system 2, the clamping robot control system 3, the water coating robot control system 4 and the data acquisition system 6, and drives each system to work together in an orderly manner; the optical device control System 5 is respectively con...

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Abstract

The invention discloses a method and device for laser shock strengthening and shape correction of the welding seam of the engine bifurcated tail nozzle. The method firstly analyzes the failure of the tail nozzle to determine the weld area that needs laser shock strengthening, and then laser shocks The strengthening unit performs impact strengthening on the weld area to be strengthened according to the impact strengthening processing parameters of the thin-walled plate, and then uses an optical measuring instrument to measure the dynamic strain field of the material in the laser shock strengthening area online, and calculates the strain field data to obtain the material dynamic constitutive equation and dynamic Strain rate data, at the same time, align the tail nozzle measurement model with the CAD model with the help of a three-dimensional contour scanner, calculate the curvature error and twist error of the tail nozzle strengthening area, and then transmit all the measured data to the overall machine control system, Adjust the laser parameters for shock strengthening and determine the laser parameters and path for shape correction, and then use the laser shock strengthening unit to realize the shape correction of torsion and bending during the strengthening process of the tail nozzle.

Description

technical field [0001] The invention relates to the technical field of aero-engine tail nozzle processing, in particular to a method and a device for laser shock strengthening and shape correction of engine bifurcated tail nozzle welds. Background technique [0002] The tail nozzle is one of the key components of the engine, and it is welded by thin-walled plates. Nozzle cracks are the most common failure form of the tail nozzle, which has a great impact on the reliability of the nozzle. Since the structure of the bifurcated tail nozzle has a certain natural frequency of vibration, when it works under the action of disturbance force or torque, it will vibrate forcibly according to the excitation frequency. When the excitation frequency is the same as its natural frequency, resonance will occur. As a result, the exhaust nozzle crack failure. The crack failure of the bifurcated nozzle mainly occurs in the weld area of ​​the front transition section of the nozzle. The existen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D3/00C21D10/00
CPCB21D3/00C21D10/005
Inventor 林超辉张永康朱然汪璐
Owner GUANGDONG UNIV OF TECH
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