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Working principle of laser welding machine

Laser welding machine is a kind of welding tool with high precision and efficiency, which is widely used in various industries. It utilizes the energy of a laser beam to melt and connect different materials, with excellent welding quality and reliability. The working principle of the laser welding machine mainly involves the processes of laser emission, focusing, melting and connection. The working principle and relevant details of the laser welding machine will be introduced in detail below.

First of all, the working principle of the laser welding machine needs to generate high-energy laser beam through the laser transmitter. The generation of laser beams is achieved by the laser medium in the laser emitter being excited by arcs, photons, and other means. When the laser medium is excited, the energy levels of its atoms or molecules change, resulting in stimulated radiation that excites other atoms or molecules, ultimately forming a high-energy laser beam.

Secondly, the laser beam needs to be processed by a focusing system to concentrate on the welding area. The focusing system mainly includes lenses, reflectors, etc. The function of a lens is to focus a beam of light onto a small focal point through refraction, thereby achieving high concentration of laser energy. The reflector is used to reflect and orient the beam, ensuring that the beam can accurately illuminate the welding position after being focused.

Thirdly, when the laser beam irradiates the welding area, it can cause melting and fusion of the welding material. The high energy density of the laser beam causes the welding material to rapidly heat up and reach the melting point, forming a molten pool. The formation and maintenance of the molten pool require controlling parameters such as laser beam energy, irradiation time, and welding speed. Generally, the laser welding machine is adjusted and controlled according to the specific material and welding requirements to ensure the stability of welding quality and good performance.

Finally, as the welding material melts and fuses, the laser beam gradually recedes, and the temperature of the welding area also gradually decreases. After the welding is completed, the weld seam is formed and cooled to solidify, completing the entire welding process. During the welding process, it is necessary to consider parameters such as heat input, heat loss, welding speed, and welding pressure of the welding material in order to achieve ideal welding quality.

The working process of the laser welding machine also involves the selection of the laser source, the design of the beam transmission system and the adjustment of welding parameters. The combination of different working principles and parameters will directly affect the quality and efficiency of welding results.

To sum up, the working principle of laser welding machine can be divided into laser emission, focusing, melting and connection processes. The laser beam is generated by a laser emitter and focused onto the welding area through a focusing system, causing melting and fusion of the welding material. Finally, a welded joint is formed to complete the entire welding process. High quality and high efficiency laser welding can be realized by reasonably designing and controlling the parameters of each link.

Laser welding machine is widely used, especially in automobile manufacturing, electronic equipment, aerospace, optoelectronics, medical equipment and other fields. The advantages of laser welding include high weld quality, small deformation, small heat affected zone and simple process operation. With the continuous development and maturity of laser technology, the application prospect of laser welding machine will be broader.



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