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Analog standard parts for water immersion ultrasonic C-scan inspection of electron beam welds in turbine casings

A technology of electron beam welding seam and turbine casing, which is applied in the direction of material analysis, measuring device and instrument using sonic/ultrasonic/infrasonic waves to achieve the effect of expanding the range of ultrasonic testing and improving accuracy and reliability.

Active Publication Date: 2017-11-10
CHENGDU ENGINE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through analysis, the inventor believes that it is feasible to use ultrasonic waves to determine the penetration depth of the weld, but the premise is that there must be a simulation standard part that can simulate the actual part, especially the penetration part. How to simulate the actual part to be inspected and how to simulate the penetration depth is the biggest problem

Method used

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  • Analog standard parts for water immersion ultrasonic C-scan inspection of electron beam welds in turbine casings
  • Analog standard parts for water immersion ultrasonic C-scan inspection of electron beam welds in turbine casings
  • Analog standard parts for water immersion ultrasonic C-scan inspection of electron beam welds in turbine casings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The composition of the analog standard part of the present embodiment is as attached figure 1 , attached figure 2 And attached image 3 As shown, the composition of the workpiece turbine casing of the weld to be tested is as attached Figure 4 And attached Figure 5 As shown, the final diameter of the inner ring of the turbine casing after machining is φ398.22mm, and the weld to be tested is the electron beam weld 6 between part 4 and part 5 in the workpiece, and the design requires that the penetration depth of the weld is not less than 1.52mm , after testing the weld penetration is unqualified as attached Figure 6 , attached Figure 7 And attached Figure 8 shown. The composition of the simulated standard part of the present embodiment includes a rotating cylinder 3 and a coaxial disc 1 fixed on one end of the rotating cylinder by six screws. Two groups of three flat-bottomed holes 2 with different diameters perpendicular to the end face of the disc and used ...

Embodiment 2

[0043] The simulated standard parts used in this embodiment for the water immersion ultrasonic C-scan inspection of the electron beam welds of the turbine case are basically the same in composition as in Embodiment 1, except that the upper end surface of the disc is from the area where the flat-bottomed hole is to the disc. The annular plane at the edge is the sinking step plane, and the distance between the bottom surface of the flat-bottomed hole and the sinking step plane of the disc above it is δ 1 The distance between the assembly surface of the weld and the detection reference end surface δ 2 Same, the height h between the plane of the disc sinking step directly above the flat-bottomed hole and the installation end face of the simulated standard part 1 The height h from the reference end face of the weld seam of the inspected workpiece to the installation end face of the inspected workpiece 2 same.

Embodiment 3

[0045] The simulated standard parts used in this embodiment for the water immersion ultrasonic C-scan inspection of the electron beam welds of the turbine case are basically the same in composition as in Embodiment 1, except that the upper end surface of the disc is from the area where the flat-bottomed hole is to the disc. The annular plane at the edge is the sinking step plane, and the distance between the bottom surface of the flat-bottomed hole and the sinking step plane of the disc above it is δ 1 The distance between the assembly surface of the weld and the detection reference end surface δ 2 Same, the height h between the plane of the disc sinking step directly above the flat-bottomed hole and the installation end face of the simulated standard part 1 The height h from the reference end face of the weld seam of the inspected workpiece to the installation end face of the inspected workpiece 2 same. The circular plane from the area where the flat-bottomed hole is locate...

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Abstract

The invention discloses a simulated standard part for the water immersion ultrasonic C-scan detection of the electron beam weld seam of a turbine case, which comprises a rotating cylinder and a coaxial disk fixed at one end of the rotating cylinder. The lower end surface of the disk has the same diameter as There are 3 flat-bottomed holes with different diameters perpendicular to the end face of the disc, which are used as reference standards for detecting electron beam weld defects of the workpiece on the circumference. The distance δ2 between the seam assembly surface and the test reference end face is the same, the height h1 between the end face directly above the flat-bottomed hole and the installation end face of the simulated standard part is the same as the height h2 between the test reference end face of the turbine case weld and the installation end face of the inspected workpiece, and the diameter of the circle where the flat-bottomed hole is located It is basically equal to the diameter of the inner ring of the processed workpiece plus the minimum penetration depth of the weld. The invention can be used to determine the detection sensitivity and the weld depth to be monitored, and to verify the feasibility, accuracy and reliability of the water immersion ultrasonic detection process.

Description

technical field [0001] The invention relates to the technical field of electron beam weld seam detection of aero-engine turbine casings, in particular to a simulated standard part used for water immersion ultrasonic C-scan detection of aero-engine turbine casing electron beam weld seams. Background technique [0002] Turbine casing is a very important part of aero-engine. Due to its structural characteristics, working environment and material properties, the welded connection between part 4 and part 5 of the aero-engine turbine casing has high design requirements for the penetration depth of the weld, defects in the weld, and welding residual deformation. Require. In view of this, electron beam welding (EBW) is used for the welding between the part 4 and the part 5 of the turbine casing of the aero-engine. The energy density of electron beam welding is extremely high, and it is easy to realize deep penetration welding of metal materials. and good stability. It is precise...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/30
Inventor 李玲刘建乔惠芳黄志新郑斯宇张集乔雷何恒刘晓燕姚大卫罗邵凤刘素平
Owner CHENGDU ENGINE GROUP