Laser welding machines can be divided into two types according to the different ways of laser output energy: pulse laser welding and continuous laser welding.

Pulse laser welding, that is, hard light path, YAG, lamp pump, fiber optic transmission laser welding machine. It is mainly used for spot welding and seam welding of thin metal materials. Its welding process is of thermal conductivity type, that is, laser radiation heats the surface of the workpiece and diffuses into the material through heat conduction, and controls the waveform, width, peak power and repetition frequency of the laser pulse. , Make 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.

Continuous laser welding, that is, soft optical path, fiber laser welding machine. Mainly use fiber laser or semiconductor laser to continuously heat the surface of the workpiece for welding. The welding mechanism is deep penetration welding based on the pinhole effect, with large aspect ratio and fast welding speed.

Below, Foshan Fulan Laser will explain the difference between the two:

1. Definition:

1. Pulse: If a modulator is added to the laser to produce a periodic loss, a part of the output can be selected from so many pulses, which is called a pulsed laser. Simply put, the laser light emitted by the pulsed laser is one beam after another. It is a mechanical form such as waves (electric waves/light waves, etc.) emitted at the same time interval.

2. Continuous: Lasers generally output once when the light goes back and forth in the cavity. Because the cavity length is generally in the range of millimeters to meters, it can output many times per second, which is called continuous laser. Simply put, the continuous laser emits continuously. The laser pump source continuously provides energy and produces laser output for a long time to obtain continuous laser.

2. The thickness of the applicable plates is different:

1. Pulse laser is mainly used for welding thin-walled metal materials within 1mm thickness.

2. Continuous laser welding is generally used for welding plates over 1mm.

3. Working methods:

1. Pulse working mode refers to the mode in which the laser output is discontinuous and works only once every certain time interval.

2. Continuous working mode means that the laser output is continuous, and the output is not interrupted after the laser is turned on.

4. Output power:

1. The pulse laser has a large output power.

2. The output power of continuous laser is generally relatively low.

5. Peak power:

1. Generally, continuous laser can only achieve the order of 100W.

2. Pulsed laser can achieve the order of TW. The shorter the pulse width, the less the thermal effect, and more pulse lasers are used in fine processing.

6. Consumables and post-maintenance:

1. Pulse laser welding machine: It needs frequent maintenance, and there are consumables in the later period (about five months to replace a lamp, the price is about 200 yuan).

2. Continuous laser welding: almost maintenance-free, no consumables later.