Analysis of quasi-continuous laser welding cases that involve both spot welding and continuous welding!
2021-08-30
With the development of modern laser technology, the application of lasers in various industries has become more in-depth, not only solving the shortcomings present in traditional processing but also achieving numerous breakthroughs in technology. Currently, laser welding technology has been widely applied in the 3C field, including various modules for mobile phones, mid-plate covers, and other industrial manufacturing. In recent years, the rapid development of industries such as new energy vehicles and 3D printing has also made laser precision welding a new market demand, especially in the application of new energy battery welding. Recently, in response to the stability of precision welding, Chuangxin laser welding engineers conducted relevant experimental analyses.
Experimental Method:
Using Chuangxin Laser's MFQS-150W/1500W quasi-continuous fiber laser to perform precision spot welding on stainless steel, the laser spot welding experiment was conducted on a scanning galvanometer laser welding platform, using coaxial auxiliary gas protection. Under different laser peak power (300W, 600W, 900W, 1200W, 1500W), the light waveform and process parameters were optimized to ensure the quality of the weld points. A total of 50 weld points were made on the stainless steel sheet, and by measuring the sizes of the weld points under five sets of parameters, the uniformity of the weld points and the stability of the laser output were analyzed.
Figure 1: 50 weld points on the stainless steel sheet
Figure 2: Magnified view of weld points
Experimental Results:
1. Experimental Effect at Laser Peak Power 300W
1) Test Waveform
2) The sizes of 50 weld points on stainless steel (mm) are as follows:
3) Chart Analysis
4) Conclusion:
The size range of the weld points is 1.1 to 1.3mm, with an average weld point size of 1.22mm, a fluctuation of 9.8%, and the weld points are uniform and the output is stable, meeting the precision welding requirements.
2. Experimental Effect at Laser Peak Power 600W
1) Test Waveform
2) The sizes of 50 weld points on stainless steel (mm) are as follows:
3) Chart Analysis
4) Conclusion: The size range of the weld points is 1.79 to 2.1mm, with an average weld point size of 1.94mm, a fluctuation of 8.2%, and the weld points are uniform and the output is stable, meeting the precision welding requirements.
3. Experimental Effect at Laser Peak Power 900W
1) Test Waveform:
2) The sizes of 50 weld points on stainless steel (mm) are as follows:
3) Chart Analysis
4) Conclusion: The size range of the weld points is 2.3 to 2.57mm, with an average weld point size of 2.48mm, a fluctuation of 7.2%, and the weld points are uniform and the output is stable, meeting the precision welding requirements.
4. Experimental Effect at Laser Peak Power 1200W
1) Test Waveform:
2) The sizes of 50 weld points on stainless steel (mm) are as follows:
3) Chart Analysis
4) Conclusion: The size range of the weld points is 2.43 to 2.97mm, with an average weld point size of 2.76mm, a fluctuation of 7.6%, and the weld points are uniform and the output is stable, meeting the precision welding requirements.
5. Experimental Effect at Laser Peak Power 1500W
1) Test Waveform
2) The sizes of 50 weld points on stainless steel (mm) are as follows:
3) Chart Analysis
4) Conclusion: The size range of the weld points is 2.67 to 3.12mm, with an average weld point size of 2.89mm, a fluctuation of 7.6%, and the weld points are uniform and the output is stable, meeting the precision welding requirements.
Summary
From the analysis of the experimental results, it can be seen that when the laser peak power is 300W, 600W, 900W, 1200W, and 1500W, the fluctuation of the weld point sizes remains within 8%, with concentrated and stable energy, uniform weld points, which can well meet the precision spot welding of consumer electronics and the repair welding of gold and silver jewelry, such as the shells of electronic products, shielding covers, USB connectors, conductive patches, and gold and silver jewelry.
Advantages of Quasi-Continuous Fiber Laser:
1: Integrated machine mode, no need for customers to perform secondary integration;
2: Air cooling method, reducing water cooling machines;
3: Built-in waveform software editing function;
4: Compatible with analog signal control;
5: Simple structure, small size, lightweight;
6: Good beam quality, high energy stability;
7: Fiber structure, ultra-long lifespan.
Whether to use a quasi-continuous laser in laser welding depends on the specifications of the user's workpieces, material characteristics, and process requirements. Quasi-continuous lasers have obvious advantages in replacing traditional YAG spot welding. Currently, the main domestic brands of laser equipment include Ruike Laser and Chuangxin Laser. The type of laser equipment needed requires the laser equipment solution provider to offer suitable brands and models to better match the equipment used by the user.
About Us
Shenzhen SHINHOP Laser Equipment Co., Ltd. It is a scientific and technological enterprise specializing in the research and development, production and sales of industrial laser processing equipment. It has been deeply engaged in the new energy industry for 20 years, focusing on the non-standard customization of automatic lithium battery cell assembly line and module PACK production line. It has successively obtained the national high-tech and specialized new enterprise certification.
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Customer service hotline:18898357350
Customer service E-mail:info@shinhop.com
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