Based on the principle of the thermal effect of the laser. It generates a high-energy density laser beam through a laser device. The laser beam is focused on the surface of the material to be welded, enabling the material to rapidly absorb the energy of the laser. The temperature then rises sharply, reaching the melting point or even the boiling point of the material. As a result, the material melts and fuses together, forming a firm welding joint. During the welding process, protective gases (such as argon, nitrogen, etc.) are usually used in conjunction to prevent the metal in the welding area from being oxidized at high temperatures and to ensure the welding quality

　　The common parameters of handheld laser welding machines are as follows:

　　Power Parameters

　　Laser Power: Commonly available powers include 1000W, 1500W, 2000W, 3000W, etc. The higher the power, the stronger the welding ability, and the thicker the material that can be welded. For example, a 1500W machine can weld stainless steel and carbon steel within 3mm in thickness, and galvanized sheet and aluminum within 2mm in thickness.

　　Power Adjustment Range: Generally, it is between 10% - 100%, and the output power can be precisely adjusted according to the welding requirements.

　　Power Ramp-up/Ramp-down Time: The time it takes for the laser to go from 0% to the set value or from the set value to stop emitting light. It is recommended to set it to 0 for handheld welding.

　　Time Parameters

　　Pulse Width: An important parameter to distinguish between material removal and material melting, which determines the cost and volume of the processing equipment.

　　Pre-light Gas Blowing Delay: The time from the start of gas blowing when the processing signal is first triggered to the start of laser emission. It is recommended to set it to 50ms for handheld welding.

　　Post-light Gas Blowing Delay: The time for which the gas blowing continues after the trigger processing signal is disconnected. It is recommended to set it to 50ms.

　　Frequency Parameters

　　PWM Frequency: The number of times the signal goes from high level to low level and then back to high level per second. It is recommended to set it between 800Hz - 5000Hz.

　　Maximum Modulation Frequency: The highest modulation frequency that the laser can achieve, which can generally reach up to 5KHz.

　　Beam Parameters

　　Laser Wavelength: Commonly 1080nm ± 5nm or 1064nm, and this wavelength has good absorptivity and stability.

　　Spot Diameter: Generally between 1-3 millimeters and can be adjusted as needed.

　　Beam Quality: Usually expressed by M2, for example, M2 < 1.5, which has high focusing and cutting properties.

　　Defocus Amount: It is divided into positive defocus and negative defocus. When the focal plane is above the workpiece, it is positive defocus, and vice versa.

　　Welding Performance Parameters

　　Welding Speed: Generally, it can reach dozens of meters or even hundreds of meters per minute, and some can reach 10 meters per minute.

　　Weld Seam Width: Generally in the range of 0.1-1 millimeter.

　　Welding Thickness: The welding thickness varies for different power welding machines. For example, a 1000W machine can weld stainless steel and carbon steel within 2mm in thickness.

　　Welding Gap Requirement: ≤ 0.5mm for oscillating welding, and ≤ 1mm for oscillating wire filling welding.

　　Other Parameters

　　Working Mode: There are continuous, pulse, spot welding, etc.

　　Working Voltage: Commonly AC220V/AC380V, 50Hz/60Hz.

　　Protective Gas: Nitrogen and argon are commonly used.

　　Equipment Size and Weight: The size and weight vary depending on the equipment model. For example, the product size is 1190L * 800W * 1090H (mm), and the weight is 34kg - 90kg.