2. Laser welding process
Laser welding requires not only a good laser source, but also a high quality laser beam to ensure the desired "deep penetration deep soldering". A high quality laser beam can achieve a smaller focus diameter or a larger focal length. The line energy is extremely low and the amount of deformation is significantly reduced. As with advanced automated arc welding, off-line programming, weld tracking and other necessary welding control systems are also required for laser welding of large workpieces.
If laser welding is used alone, the gap between the weld joints is 0.1 to 0.2 mm. However, the wider gap requires us to add filler metal. Usually, the filler metal can be used to achieve a weld bridging capacity of 0.4 mm. A 12 kW CO2 laser source has been used in the industrial field. At this time, the conduction of the laser is performed through the mirror surface. The laser beam is applied to the workpiece by a focusing device at a focusing distance of 300 mm. A 4 kW Dengura YAG laser and a 7 KW fiber laser also appeared in this study.
3.Laser-MIG (LaserHybrid) hybrid welding
The laser beam gathering intensity when laser welding metal can reach 106W/cm2 or more. When the laser beam is clicked on the surface of the material, the temperature at that point rapidly rises to the volatilization temperature, and a volatilization hole is formed due to the volatilization of the metal vapor. The most notable feature of the weld is its high aspect ratio. The energy density of the free-burning arc of MIG arc welding is slightly higher than 104 W/cm2.
Figure 1 depicts the basic principles of laser hybrid welding, especially the metal transitions therein. From the figure we can see that the laser beam inputs heat to the top of the weld and the arc also inputs heat to the weld. Laser-MIG hybrid welding is not a method in which two welding methods are applied to the welding zone in sequence, but simultaneously to the welding zone. Both laser and arc affect the performance of the weld. The use of different arc or laser processes and the choice of process parameters can have different effects on the welding process.
Laser hybrid welding increases the penetration depth and welding speed. During the welding process, the metal vapor volatilizes and reacts to the plasma zone. The plasma zone absorbs the laser slightly, but it can be ignored. The characteristics of the entire welding process depend on the ratio of the selected laser and arc input energy.
The temperature of the surface of the workpiece greatly affects the absorption of the energy of the laser beam. When the surface of the workpiece reaches the volatilization temperature, a volatilization hole is formed, so that almost all the energy can be transmitted to the workpiece. The energy required for welding is determined by the surface absorbance as a function of temperature and the energy lost by the conduction of the workpiece. In laser-MIG welding, volatilization occurs not only on the surface of the workpiece, but also on the surface of the filler wire, which means more metal volatilization, which makes the energy transfer of the laser easier. It also guarantees the integrity of the welding process. This makes the energy transfer of the laser easier. It also guarantees the integrity of the welding process.
Moreover, the first thing that must be done in shipbuilding is that there is sufficient bridging connection capability when the weldment gap is large, which is the main goal of the research. Because in the welding process, it is inevitable that the gap tolerance will vary, so there are more parameters to adjust during welding, such as: laser power, welding speed, wire feeding speed and angle adjustment.
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8011 Color Coated Aluminum Coil sheet is most popular commercial alloys in packaging industry, 8011 H14 color coated Aluminum Coil sheet normally used for making PP cap, ROPP cap, aluminium closure, aluminium pharmaceutical cap, aluminium cosmetic cap etc
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More commonly used for the 8011 belongs to other series. My memory is to do caps as the main function of aluminum, also used in the radiator, the majority of applications for the Aluminum Foil. Less common.
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