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Introduction: According to the different lasers, laser welding machines are mainly divided into: lamp pump, semiconductor, optical fiber, and optical fiber transmission (YAG).

Optical fiber transmission laser welding machine can be divided into two types: energy feedback (high configuration) and current feedback (low configuration).

Text: The fiber transmission energy feedback laser welding machine produced by Foshan Fulan Laser is a pulsed laser welding machine. Its welding process is of heat conduction type, that is, laser radiation heats the surface of the workpiece and diffuses into the material through heat conduction to control the waveform and width of the laser pulse The parameters such as peak power and repetition frequency make the workpieces melt and form a specific molten pool, so as to form a good connection between the workpieces. The biggest advantage of pulsed laser welding is that the overall temperature rise of the workpiece is small, the range of thermal influence is small, and the deformation of the workpiece is small. Mainly used for spot welding, butt welding, overlap welding, sealing welding, seam welding and penetration welding of thin-walled metal materials such as stainless steel, carbon steel, aluminum, copper, titanium, tin, chromium, niobium, gold, etc. Now, Foshan Fulan Laser mainly talks about the principle and performance characteristics of the optical fiber transmission energy feedback laser welding machine system.

1. System principle: An energy detection device is added to the output end of the laser to detect the size of the output laser energy, and the signal is fed back to the control system in real time, and compared with the set theoretical energy to form a closed loop control The system achieves the purpose of accurately controlling the laser energy output.

2. Performance characteristics:

1. The CPU processing unit of the system adopts dual-processor technology to separately control the overall operation of the control soft system and the control of the discharge unit;

2. The charging box uses an inverter boost circuit, which isolates the connection with the external power grid, is not affected by the voltage fluctuation of the external power grid, and outputs a stable DC voltage to the energy storage capacitor;

3. Since the voltage of the inverter boost is constant voltage, the stability of the output discharge is ensured, and the laser energy is more stable;

4. The inverter boost output can reach up to 700V, which is 100-150V higher than the ordinary power supply. Using the same type of xenon lamp, the discharge current is increased by 150-200A, and it has the ability to truly discharge more than 450A current, which greatly increases the laser output peak power. Improve the penetration of laser welding;

5. Due to the increase in voltage, the rising and falling edges of the output current are faster, faster than the proficient power effect, and the output waveform is closer to the set waveform;

6. Discharge box, PWM modulation frequency is twice that of general power supply, and the response is faster;

7. Professional energy feedback technology enables the control of laser energy to form a closed-loop system, which makes the energy more stable, which is a guarantee for precision laser welding;

8. Friendly man-machine exchange interface, unique file direct storage function, storage space up to 8G, which can fully meet the storage of any file;

9. The structural design of the power system fully considers the use in industry and this environment to prevent dust from affecting the circuit and prevent the leakage of the laser cavity from affecting the power system;

10. The key components of the power system are all imported from abroad to ensure the long-term stable operation of the laser equipment.