The parameters that directly affect the quality of laser welding include the energy of the laser pulse, the spot diameter of the laser beam, the frequency of the laser pulse, the pulse width of the laser, the pulse waveform of the laser, the relative light absorbance of the material being welded, the welding speed, and the protection Gas and so on.
Laser pulse energy: refers to the energy that a single laser pulse can output at the maximum, in J (Joules). 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 Focusing Diameter: This is an extremely important parameter that reflects the design performance of the laser in units of (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.
The frequency of the laser pulse: This is the ability to reflect how many pulses the laser can make in one second, in (Hz). The first thing to note is that the weld metal is the energy to use the laser, and in the case of a constant laser power, the higher the frequency, the lower the energy output per laser. Therefore, we need to ensure that the energy of the laser is sufficient 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.
More about laser cutting machine related technical issues, operating principles, methods and fiber laser cutting machine selection configuration and other issues can call Wuhan Pilot Laser Equipment Manufacturing Co., Ltd., we will be happy to help you, you can call, 027-59221192 Or call Wuhan pilot laser 24-hour hotline 18627889288; and can also visit Wuhan Pilot Laser Equipment Manufacturing Co., Ltd. official website:; to inquire and understand, we look forward to your calls and advice, your satisfaction is our aim to pilot laser services! ! !
Laser pulse energy: refers to the energy that a single laser pulse can output at the maximum, in J (Joules). 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 Focusing Diameter: This is an extremely important parameter that reflects the design performance of the laser in units of (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.
The frequency of the laser pulse: This is the ability to reflect how many pulses the laser can make in one second, in (Hz). The first thing to note is that the weld metal is the energy to use the laser, and in the case of a constant laser power, the higher the frequency, the lower the energy output per laser. Therefore, we need to ensure that the energy of the laser is sufficient 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.
More about laser cutting machine related technical issues, operating principles, methods and fiber laser cutting machine selection configuration and other issues can call Wuhan Pilot Laser Equipment Manufacturing Co., Ltd., we will be happy to help you, you can call, 027-59221192 Or call Wuhan pilot laser 24-hour hotline 18627889288; and can also visit Wuhan Pilot Laser Equipment Manufacturing Co., Ltd. official website:; to inquire and understand, we look forward to your calls and advice, your satisfaction is our aim to pilot laser services! ! !
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