What Are The Main Components Of Laser Welding Equipment?

In order to weld and process materials, solid laser equipment and gas laser equipment are commonly used.

The composition of laser welding equipment includes the following parts.

What Are The Main Components Of Laser Welding Equipment

(1) Laser generator

Laser generator is an important part of laser welding equipment, which provides the light energy required for processing. The requirement for the laser is stable, reliable and can operate normally for a long time.

(2) External optical path, beam processing and focusing system

It is used for beam transmission and focusing.

In low-power systems, the focusing lens is mostly used, and in high-power systems, the reflective focusing mirror is generally used.

(3) Main machine and numerical control system with special function

It is used to generate the relative motion between the workpiece and the beam.

The precision of laser processing machine has a great influence on the precision of welding or cutting.

According to the relative motion between the beam and the workpiece, the machining machine can be divided into two-dimensional, three-dimensional and five-dimensional.

The two-dimensional motion is in the X and Y directions in the plane, and the three-dimensional motion increases the motion in the direction perpendicular to the X-Y plane;

The five-dimensional is based on the three-dimensional, adding 360 ° rotation in the Z-Y plane and ± 180 ° swing in the X-Y plane in the Z direction, which can realize all-round machining.

(4) Computer and application software

The computer is used to control and adjust the whole laser processing machine.

Such as controlling the output power of the laser, controlling the movement of the worktable, and monitoring the laser processing quality.

The welding parameters or machining parameters of the whole machining machine can be controlled by computer, so that the welding and machining process can be carried out within the best range of welding and machining parameters, and good machining quality can be obtained.

(5) Detection and control system

It includes radiation parameter sensor, process parameter sensor and its control system.

The radiation parameter sensor is used to monitor the changes of laser output parameters.

Monitor the temperature of the processing area, the state of the surface of the workpiece and the brightness of the beam section, and transmit the signal to the program-controlled equipment, which is mainly used to detect the output power or output energy of the laser, and control the power or energy through the control system.

The process parameter sensor is mainly used to detect the temperature of the processing area, the surface condition of the workpiece and the characteristics of the plasma, so as to make necessary adjustments through the control system.

The main function of the control system is to input parameters and display and control parameters in real time. In addition, it also has the functions of protection and alarm.

(6) Auxiliary gas control and cooling system

During welding, the main function of the system is to transport inert gas and protect the weld.

During high-power laser welding, vapor plasma is generated above the weld pool, which will reflect, absorb and scatter the beam, reduce the energy utilization and make the penetration shallow.

At this time, the plasma above the weld can be blown away by conveying appropriate gas.

For different welding materials, appropriate gas mixture shall be delivered to increase penetration.

(7) Collimated laser

Generally, a low-power He Ne laser is used to adjust the optical path and align the workpiece.

The above is the typical composition of laser welding equipment.

In fact, due to different application occasions and different processing requirements, the above parts may not be available, and the functions of each part are also very different.

The selection of equipment can be determined according to the actual application.

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