8 Main Parameters of Laser Cutting Machine
There are 8 main parameters of a laser cutting machine. They are cutting speed, cutting head height, focal length, laser pulse frequency, laser pulse duty cycle, laser power supply, laser power, and auxiliary gas.
Normaltan China discusses these parameters of the laser cutting machine with everyone, to pay attention to them when purchasing equipment.
Cutting speed: Cutting speed refers to the length cut by the laser cutting machine per unit of time, usually expressed in millimeters per second (mm/s. (or inches per second). Cutting speed is the distance between the workpiece and the speed of light in the feed direction Relative displacement. The moving speed of the cutting head on the material plane is inversely proportional to the continuous cutting time of the laser beam at the current point. The higher the speed, the shorter the duration of the laser head. The geometric parameters of the cutting workpiece will also affect the cutting speed of the laser head. In the case of the same time, the smaller the workspace for cutting the workpiece, the more serious the heat accumulation phenomenon of the material.
The focal length is the distance from the laser-focusing lens to the surface of the material.It expressed in millimeters (mm). The choice of focal length also affects cutting quality and efficiency. The height of the laser cutting head from the cutting surface directly affects the plane focal area, that is, the energy density. The laser beam is focused under the nozzle through the lens, and the point with the highest laser power density is the focal point.
Laser current: directly affects the power of the laser beam. When the laser current value is 100%, the power of the laser beam has been adjusted to the maximum value. The laser current of the laser cutting machine can vary according to different models, materials, and applications.
Laser pulse frequency:
The laser repetition frequency refers to the pulse laser, which refers to the number of pulses that regularly output the laser within a unit of time. equivalent to the number of times the pulse repeats in one second, the unit is hertz (Hz). The frequency of the laser pulse is the number of pulses that the laser can emit per unit of time (second). In addition to continuous laser beams, there are also pulsed laser beams, i.e. laser beams that can be switched on and off continuously and rapidly. A function for power regulation by adjusting its duty cycle.
Laser pulse duty cycle:
Pulse laser refers to a laser with a single laser pulse width of fewer than 0.25 seconds, which only works once at a certain interval. It has a large output power and is suitable for laser marking, cutting, distance measurement, etc. Pulsed lasers work by emitting a pulse of light from the laser. ‘Laser pulse duty cycle’ refers to the percentage value of the time that the pulsed laser is continuously on, which is proportional to the laser power. For example, when the duty cycle is 100%, the laser is fully on in one cycle, that is, continuous laser.
Laser power supply:
As a component that excites the laser to emit light, the laser power supply is divided into several parts to supply energy. Sometimes it needs to be turned off separately to reduce the power of the laser.
Laser power is an important parameter of a laser-cutting machine, usually expressed in watts (W). The higher the laser power, the faster the cutting speed, but it will also affect the cutting accuracy and quality.
Because the cutting speed is different, it is very important to adjust the laser power at any time. When the cutting direction is changed during the operation of the cutting machine, the linear cutting speed of the cutting head will be higher than the translational speed. That is to say, if there is no quick adjustment of power at this time, the energy release will be too high, which will directly affect the cutting quality of the workpiece. In short, we need a modulator to adjust the laser power to suit the situation when the machine cuts corners.
(oxygen, nitrogen, compressed air, etc.):
The nozzle shoots auxiliary gas, which can directly improve the quality of cutting work to avoid the cutting head from being disturbed by smoke and dust. Even though the assist gas is not directly related to the laser power/duration of the spot cut, it is still a factor that the machine only needs. Different gases can be selected to meet different material-cutting requirements.
When purchasing a fiber laser cutting machine, you need to consider whether the equipment can meet your own operating needs. The power of the laser cutting machine is one of the core parameters of the equipment. In addition, the 8 parameters in the above article also determine the performance of the laser cutting machine, which can help you choose a suitable laser cutting machine for your own needs.