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Chinese Optics Letters, Volume. 22, Issue 1, 011203(2024)

Welding depth measurement for different mode lasers using optical coherence tomography

Guanming Xie1,2, Sanhong Wang3, Yueqiang Zhang1,2、*, You Li4, Biao Hu1,2, Yu Fu1,2, and Qifeng Yu1,2,5
Author Affiliations
  • 1Institute of Intelligent Optical Measurement and Detection, Shenzhen University, Shenzhen 518060, China
  • 2College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
  • 3Shenzhen Sincevision Technology Co., Ltd., Shenzhen 518055, China
  • 4National Key Laboratory of Human Factors Engineering, China Astronaut Research and Training Center, Beijing 100094, China
  • 5College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China
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    Schematic of the welding depth measurement system based on SD-OCT.

    Fig. 1. Schematic of the welding depth measurement system based on SD-OCT.

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    (a) Laser welding system; (b) beam profiles of the multimode laser; (c) beam profiles of the ARM laser; (d) SD-OCT system.

    Fig. 2. (a) Laser welding system; (b) beam profiles of the multimode laser; (c) beam profiles of the ARM laser; (d) SD-OCT system.

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    OCT data for single-beam laser welding of (a) mild steel Q235 with 800 W laser power and (b) Al alloy 6061 with 1750 W laser power at 3 m/min welding speed.

    Fig. 3. OCT data for single-beam laser welding of (a) mild steel Q235 with 800 W laser power and (b) Al alloy 6061 with 1750 W laser power at 3 m/min welding speed.

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    Top, the OCT data for ARM laser welding of Al alloy 6061 at 5 m/min welding speed with (a), (c) pure core setup and (b), (d) ring/core setup. Bottom, the micrograph of the corresponding seam surface.

    Fig. 4. Top, the OCT data for ARM laser welding of Al alloy 6061 at 5 m/min welding speed with (a), (c) pure core setup and (b), (d) ring/core setup. Bottom, the micrograph of the corresponding seam surface.

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    Top, OCT data for bead-on-plate welding of (a) Al alloy 6061 and (b) Cu T2; (c) OCT data for overlap welding of Al alloy 6061 and Cu T2. Bottom, the corresponding transverse cross section and process parameters.

    Fig. 5. Top, OCT data for bead-on-plate welding of (a) Al alloy 6061 and (b) Cu T2; (c) OCT data for overlap welding of Al alloy 6061 and Cu T2. Bottom, the corresponding transverse cross section and process parameters.

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    • Table 1. Compositions of Mild Steel Q235, Al Alloy 6061, and Cu T2

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      Table 1. Compositions of Mild Steel Q235, Al Alloy 6061, and Cu T2

      MaterialsChemical Compositions
      Q235MnCSiPCuSNiCrFe
      Mass fraction (%)0.50.180.250.0160.010.0180.010.01Bal.
      6061SiCuFeMgMnCrZnNiAl
      Mass fraction (%)0.60.280.71.00.150.20.250.05Bal.
      T2PNiSiFeZnSAgPbCu
      Mass fraction (%)0.070.020.040.080.090.090.10.005Bal.

    • Table 2. Process Parameters and Transverse Cross Section

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      Table 2. Process Parameters and Transverse Cross Section

      SetupPure CoreRing/Core
      Welding speed5 m/min5 m/min
      Focus position0 mm0 mm
      Core power800 W800 W
      Ring power0 W800 W
      Actual weld width0.88 mm1.09 mm
      Actual weld depth0.77 mm0.92 mm
      Transverse cross section
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    Guanming Xie, Sanhong Wang, Yueqiang Zhang, You Li, Biao Hu, Yu Fu, Qifeng Yu. Welding depth measurement for different mode lasers using optical coherence tomography[J]. Chinese Optics Letters, 2024, 22(1): 011203

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    Paper Information

    Category: Instrumentation, Measurement, and Optical Sensing

    Received: Aug. 28, 2023

    Accepted: Sep. 18, 2023

    Published Online: Jan. 22, 2024

    The Author Email: Yueqiang Zhang (yueqiang.zhang@szu.edu.cn)

    DOI:10.3788/COL202422.011203

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology