Blue Laser-Assisted Infrared MOPA Fiber Laser Spot Welding of Pure Copper Sheets

Chenyang Wang; Qin Lin; Chao Lü; Fangwei Wang; Liu Lü; Feng Wang; Xiao Yuan

doi:10.3788/CJL202249.1602008

Chinese Journal of Lasers, Volume. 49, Issue 16, 1602008(2022)

Blue Laser-Assisted Infrared MOPA Fiber Laser Spot Welding of Pure Copper Sheets

Chenyang Wang^1,2, Qin Lin¹, Chao Lü¹, Fangwei Wang¹, Liu Lü², Feng Wang^1,3, and Xiao Yuan^3、*

Author Affiliations

¹Lingyun Photoelectronic System Co., Ltd., Wuhan 430205, Hubei, China

²School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China

³School of Optoelectronic Science and Engineering, Soochow University, Suzhou 215006, Jiangsu, China

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Figures & Tables(11)

Fig. 1. Schematic of optical path of dual-wavelength coaxial system

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Fig. 2. Welding spots arrangement and welding cycle. (a) Four welding spots arrangement for tensile test; (b) working sequence of dual-wavelength laser during single spot welding

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Fig. 3. Dependence of welding tension on blue laser preheating and holding time. (a) Dependence of welding tension on preheating time; (b) dependence of welding tension on holding time

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Fig. 4. Dependence of welding tension on blue laser and MOPA laser powers. (a) Dependence of welding tension on blue laser power; (b) dependence of welding tension on MOPA laser power

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Fig. 5. Tension comparison of copper sheets welded by IR MOPA fiber laser with and without blue laser

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Fig. 6. Surface quality comparison of welding spots with and without blue laser assistance. (a) Photographs of welding spots surface; (b) measured surface topography of welding spots

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Fig. 7. Cross-sections of molten pools. (a) Only 70 W MOPA laser welding; (b) only 110 W MOPA laser welding; (c) 30 W blue laser-assisted 70 W MOPA laser welding

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Fig. 8. Metallographic microscopy and scanning electron microscopy pictures of bottom edge of molten pools

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Table 1. Laser parameters used in dependence experiments of welding tension on blue light preheating and holding time
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Table 1. Laser parameters used in dependence experiments of welding tension on blue light preheating and holding time
Sample P_B /W P_M /W T /ms t_M /ns F_M /kHz v₁ /(mm·s^－1)
1#(0.1 mm＋0.25 mm) 50 80 25 350 100 130
2#(0.2 mm＋0.25 mm) 60 100 30 350 100 100

Table 2. Laser parameters used in dependence experiment of welding tension on blue and infrared (IR) MOPA laser powers
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Table 2. Laser parameters used in dependence experiment of welding tension on blue and infrared (IR) MOPA laser powers
Sample T₁ /ms T₂ /ms T /ms t_M /ns F_M /kHz v₁ /(mm·s^－1)
1# 50 50 25 350 100 130
2# 30 70 30 350 100 100

Table 3. Laser parameters used in only MOPA laser welding and blue-assisted MOPA laser welding experiments
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Table 3. Laser parameters used in only MOPA laser welding and blue-assisted MOPA laser welding experiments
Light source P_B /W T₁ /ms T₂ /ms T /ms t_M /ns F_M /kHz v₁ /(mm·s^－1)
MOPA 50 350 100 50
Blue＋MOPA 30 30 70 50 350 100 50

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Chenyang Wang, Qin Lin, Chao Lü, Fangwei Wang, Liu Lü, Feng Wang, Xiao Yuan. Blue Laser-Assisted Infrared MOPA Fiber Laser Spot Welding of Pure Copper Sheets[J]. Chinese Journal of Lasers, 2022, 49(16): 1602008

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Paper Information

Category: laser manufacturing

Received: Sep. 9, 2021

Accepted: Dec. 6, 2021

Published Online: Jul. 28, 2022

The Author Email: Yuan Xiao (xyuan@suda.edu.cn)

DOI:10.3788/CJL202249.1602008

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Laser parameters used in dependence experiments of welding tension on blue light preheating and holding time

Table 1. Laser parameters used in dependence experiments of welding tension on blue light preheating and holding time

Table 2. Laser parameters used in dependence experiment of welding tension on blue and infrared (IR) MOPA laser powers

Table 2. Laser parameters used in dependence experiment of welding tension on blue and infrared (IR) MOPA laser powers

Table 3. Laser parameters used in only MOPA laser welding and blue-assisted MOPA laser welding experiments

Table 3. Laser parameters used in only MOPA laser welding and blue-assisted MOPA laser welding experiments