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Simulation standard part for water-logging ultrasonic C scanning detection of turbine case electron beam welds

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

Active Publication Date: 2016-01-27
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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  • Simulation standard part for water-logging ultrasonic C scanning detection of turbine case electron beam welds
  • Simulation standard part for water-logging ultrasonic C scanning detection of turbine case electron beam welds
  • Simulation standard part for water-logging ultrasonic C scanning detection of turbine case electron beam welds

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Experimental program
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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 simulation standard part for water-logging ultrasonic C scanning detection of turbine case electron beam welds. The simulation standard part comprises a rotary cylinder and a coaxial disk fixed to one end of the rotary cylinder. Three flat-bottom holes with different diameters are machined in the circumference with the same diameter of the lower end face of the disk. The flat-bottom holes are perpendicular to the end face of the disk and are used for detecting electron beam weld defects of workpieces as reference standards. The distance delta 1 between the hole bottom faces of the flat-bottom holes and the upper end face of the disk above the flat-bottom holes is equal to the distance delta 2 between a turbine case weld assembly face and a detection reference end face. The height h1 between the end face over the flat-bottom holes and a mounting end face of the simulation standard part is equal to the height h2 between a turbine case weld detection reference end face and a mounting end face of a tested workpiece. The diameter of the circumference where the flat-bottom holes are located is basically equal to the sum of the diameter of the inner circle of the machined tested workpiece and the minimum penetration value of the welds. The simulation standard part can be used for determining detection sensitivity and weld penetration to be monitored and verifying the feasibility, accuracy and reliability of water-logging ultrasonic detection technology.

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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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