Introduction of laser welding machine

Laser welding machine, also known as laser welding machine, is a thermal processing process that uses a laser beam as a heat source. Compared with electron beam plasma beam and general mechanical processing, it has many advantages. The laser focal spot of the laser beam is small and the power density is high, which can weld some alloy materials with high melting point and high strength. Laser welding is a non-contact process, and there are no problems such as tool wear and tool exchange.

Laser welding machine welding heat affected zone is small, material deformation is small, no need for subsequent processing. The laser can weld workpieces in vacuum containers and workpieces in complex structures through glass. The laser beam is easy to guide and focus, and realize the transformation of various directions. Compared with electron beam processing, laser welding does not require strict vacuum equipment system and is easy to operate. Laser welding has high production efficiency, stable and reliable processing quality, and good economic and social benefits.

The laser welding machine used to seal and weld the sensor metal casing is a state-of-the-art processing method, which is mainly based on the high aspect ratio of laser welding with the following characteristics. The weld seam is deep and narrow, and the weld seam is bright and beautiful. Minimum heat input. Due to the high power density, the melting process is extremely fast, the heat input to the workpiece is very low, the welding speed is fast, the thermal deformation is small, and the heat affected zone is small. High density. In the process of weld formation, the molten pool is continuously stirred, and the gas is easy to come out, resulting in the formation of non-porous penetration welds. The high cooling rate after welding is easy to make the weld microstructure, and the weld strength, toughness and comprehensive performance are high. Strong welds. High temperature heat source and full absorption of non-metallic components have a purification effect, reduce the content of impurities, change the size of inclusions and their distribution in the molten pool, no electrodes or filler wires are required during the welding process, and the melting zone is less polluted, making the weld seam Strength, toughness at least equal to or even exceed the parent metal.

Precise control. Because the focused spot is small, the welding seam can be positioned with high precision, the beam is easy to transmit and control, and there is no need to replace the welding torch and nozzle frequently, which significantly reduces the auxiliary time of downtime, high production efficiency, no inertia of light, and emergency stop at high speed and restart. Complex components can be welded with self-controlled beam shifting technology. Non-contact, atmospheric environment welding process. Because the energy comes from the laser, there is no physical contact between the workpieces, so no force is applied to the workpieces. In addition, magnetism and air have no effect on the laser. Due to the low average heat input and high machining accuracy, reprocessing costs can be reduced, and laser welding operating costs are low, resulting in lower workpiece costs. Easy to realize automation, effective control of beam intensity and fine positioning. 

The main advantages are:

1. Fast speed, large depth and small deformation.

2. Can be welded at room temperature or under special conditions, and the welding equipment is simple. For example, when a laser passes through an electromagnetic field, the beam will not be deflected; the laser can be welded in vacuum, air, and a certain gas environment, and can be welded through glass or materials that are transparent to the beam.

3. It can weld refractory materials such as titanium, quartz, etc., and can weld different materials with good effect.

4. After the laser is focused, the power density is high. When welding high-power devices, the aspect ratio can reach 5:1, and the maximum can reach 10:1.

5. Micro-welding is possible. After the laser beam is focused, a small spot can be obtained, and it can be accurately positioned, which can be applied to the group welding of micro and small workpieces in mass automatic production.

6. It can weld hard-to-reach parts and perform non-contact long-distance welding, which has great flexibility. Especially in recent years, optical fiber transmission technology has been adopted in YAG laser processing technology, so that laser welding technology has been widely promoted and applied.

7. The laser beam is easy to realize beam splitting according to time and space, and it can perform multi-beam simultaneous processing and multi-station processing, which provides conditions for more precise welding.