In this market in China, more and more manufacturers of laser welding machines are produced. There are also many small companies and individuals who do not have technical content to assemble some laser welding machines with unqualified quality for the immediate benefit of the poor. Low prices occupy the market! Bring great harm to customers! Therefore, Dongguan City Aoxin laser welding equipment Co., Ltd. in order to the interests of our customers, special how to identify the parameters of the laser welding machine is good or bad to inform our customers!
The parameters directly affecting the quality of the laser welding machine include the energy of the laser welding machine pulse, the spot diameter of the laser welding machine beam, the frequency of the laser cladding machine pulse, the laser pulse width of the laser spot welding machine, and the pulse waveform of the jewelry laser welding machine The laser light energy of the laser welding machine, such as the relative light absorption rate of the material to be welded, the welding speed, and the shielding gas, refers to the energy that a single laser pulse can maximally output, and the unit is J (joule). This is a major parameter of the laser, which determines the maximum energy that the laser can generate. According to the purpose of the mold repair, the laser energy can meet the needs of any occasion below 70J, and the large energy is also in vain, or at all. Can not be used, but also brings the laser power volume and the radiator volume continues to increase, reducing the power efficiency.
Laser spot diameter of the laser welder: This is an extremely important parameter that reflects the design performance of the laser. The unit is (mm), which determines the power density and processing range of the laser. If the optical design of the laser is reasonable and advanced, the laser energy is concentrated and the focusing is accurate. The laser spot diameter can be controlled in the range of 0.2mm-2mm, and whether the focus diameter of the laser is controlled at 0.2mm is a strict requirement for the laser generator. test. The general design of domestic lasers, because only want to reduce costs, therefore, the laser device processing is simple, the design is not rigorous, the laser divergence in the resonant cavity is serious, resulting in difficult to focus accurately, the laser output laser spot diameter does not reach the standard Weigh 0.2mm, but can only reach the minimum 0.5mm, but due to the laser's divergence, so that the output of the laser beam can not be a regular circular, resulting in the laser is actually irradiated area is too large, there ablation of the weld phenomenon, In other words, unnecessary laser irradiation occurs at both ends of the weld seam and the two ends of the weld seam are recessed. This phenomenon is particularly serious for repairing the already polished mold, and sometimes the mold may even be scrapped. Tongpu's lasers are well-designed, strict in material selection, and carefully calibrated, so that the beam spot diameter of the laser output can be precisely monitored, so that the size of the focused spot can reach a minimum of 0.2mm, and can be in the range of 0.2mm and 2mm. Stepless adjustment to reach the international advanced level.
Frequency of the laser pulse: This is the ability to reflect how many pulses the laser can shoot in one second, in (Hz). First of all, it should be noted that the welding metal is the energy to use the laser, and in the case of a constant laser power, the higher the frequency, the smaller the energy of each laser output. Therefore, we need to ensure that the energy of the laser is enough to melt the metal. In this case, the laser output frequency can be determined by considering the processing speed. In the case of laser repairing abrasives, 15Hz has been able to meet the needs of welding, and excessively high frequencies will inevitably cause the laser pulse energy to be too low, resulting in welding failure.
Laser Pulse Waveform: For pulsed laser welding, laser pulse waveform is an important issue in pulsed laser welding. When a high-intensity laser is incident on the surface of the material, the metal surface reflects 60% to 98% of the laser energy, and the reflectivity varies with the surface temperature. Therefore, different metals have different laser reflectivity and laser utilization. To perform effective welding, lasers with different waveforms must be input so that the metal structure at the weld can be crystallized in the best way to form the substrate. A uniform metal structure can form high quality welds.
Domestic general machines all use inexpensive single-waveform laser power supplies. Therefore, their welding flexibility is low, they are difficult to adapt to the welding of many kinds of mold materials, and rework is often required, which greatly wastes the time of welding materials and may cause molds. scrapped. Different metal materials have different degrees of reflection and absorption of laser light on the surface, and the same laser beam will produce different welding effects on different metals, and affect their penetration, welding speed, crystallization speed and hardness, so a single rectangular wave Welding does not solve the requirements of different mold metal welding. Tongpu TPM intelligent laser die repair welding machine adopts domestic unique intelligent waveform technology to achieve a highly flexible laser welding system, can adjust the waveform according to different applications, so that the metal structure of the weld and the matrix metal, mold or After the welding of metal parts, the weld hardness reaches HRC50-HRC58, which truly achieves non-destructive welding, which greatly improves the quality of repair welding.
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