Competitive Advantages Of Ultrasonic Metal Welding Compared To Laser Welding

Competitive Advantages Of Ultrasonic Metal Welding Compared To Laser Welding

Date:Dec 14, 2020

Competitive Advantages Of Ultrasonic Metal Welding Compared To Laser Welding

For comparison of flat panel solar collectors in terms of product aesthetics, laser welding uses high-energy lasers and then melts the welded metal to create a connection. In the butt welding of solar heat-absorbing panels, a welding spot spaced 3-5mm is used. Form to carry out butt welding. Laser welding does not require pressure on the welded workpiece, the overall deformation is small, and the surface damage to the heat absorption layer is small, while the ultrasonic metal butt welding will cause the surface of the sheet to be wavy due to pressure, although it can pass through the surface Embossing in turn avoids deformation of the sheet surface, but there will still be a weld mark of about 3mm on the surface of the solar heat absorption layer. Therefore, the appearance of products using laser butt welding will be better than ultrasonic metal butt welding.

When comparing flat-panel solar collectors in terms of effect durability, the strength of the solder joints of laser butt welding is relatively poor, and the solder joints are more likely to break when the heat and cold alternate frequently or are affected by external forces. Ultrasonic metal butt welding is to make the two objects to be welded overlap by vertical pressure, and the ultrasonic vibration pressure is combined to form a solid connection, and the bonding time is short and the bonding part does not produce the defects of casting structure, so the welding position is relatively uniform and Strong stability, the ultrasonic metal butt welding has passed the 90-degree vertical bending test and there is no fracture.

Flat panel solar collectors are compared by thermal conductivity. If laser butt welding is used, the physical structure of the object to be butt welded will change, which will affect its electrical or thermal conductivity, and laser butt welding will cause solar heat collection The heat conduction area between the metal sheet and the copper pipe must be small, which affects the heat transfer efficiency. This problem does not exist in ultrasonic metal butt welding. Ultrasonic butt joints can reduce the temperature effect of the material to a low level without changing the structure of the metal. Therefore, the electrical conductivity or thermal conductivity after butt welding is better, and the resistivity is very low or almost zero. Ultrasonic metal butt joints Welding has become a better choice for butt welding of electrically conductive and thermally conductive materials. The application of this performance to flat panel solar collectors can obviously produce advantages that cannot be achieved by laser butt welding. According to the test, the conduction efficiency of ultrasonic metal butt welding products is about 3% higher than that of laser butt welding.

Flat-panel solar collectors are compared in terms of energy consumption. As a representative product of low-carbon, energy-saving and environmental protection, solar water heaters have been widely recognized by society and consumers. Energy consumption indicators in the production process have also attracted much attention, and solar collectors Butt welding is one of them. From the comparative analysis of the principle of butt welding, it is known that ultrasonic metal butt welding can reduce the temperature effect of the material to a lower level, so as not to change the structure of the metal, so it does not anneal the metal workpiece, and does not require water treatment. For cooling, in terms of energy consumption, ultrasonic butt welding can be carried out between the same type of metal and different types of metal, which consumes much less energy compared with laser welding.

When comparing the efficiency of flat panel solar collectors, ultrasonic metal butt welding is faster than laser butt welding: the typical ultrasonic metal butt welding speed is 8m/min for copper welding and 12m/min for aluminum welding, but There are two currently selected processes for ultrasonic welding, first is knurling and then butt welding, so the efficiency of a single machine must be discounted. For the same production capacity, comparing two ultrasonic welding machines with one laser welding machine, ultrasonic is better than laser.

After comparing the double butt welding technology of flat panel solar collectors, it can be seen that in the application of ultrasonic metal butt welding in the solar energy industry, both the butt welding process and the overall performance are better than laser butt welding. And in terms of experience, ultrasonic metal butt welding, as the main butt welding technology in the solar field of our country, has relatively rich application experience. This is why many solar companies in flat panel projects in the past two years have also chosen ultrasonic This technology of metal butt welding.

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