The working principle of the laser cutting machine is to release energy when the laser beam is irradiated onto the surface of the workpiece to melt and evaporate the workpiece to achieve the purpose of cutting and engraving. The laser cutting machine has the characteristics of saving material, smooth incision, high precision and fast processing speed. , the laser cutting machine has the following eight main parameters.

• Feed speed: The continuous cutting time of the laser beam at the current point is inversely proportional to the moving speed of the cutting head on the material plane. The higher the speed, the shorter the duration and vice versa. Sometimes some geometric parameters also affect the speed. For example, when the time is similar, if the cutting part space is too small, it will cause heat accumulation in the material.

• Cutting head height: The laser beam is focused below the nozzle through the lens, and the power density at the focus is the largest. Therefore, the height of the cutting head from the cutting surface not only affects the plane focusing area, but also affects the energy density at the current point.

• Basic photocurrent: directly determines the power of the laser beam. When the ratio is 100%, the laser beam has maximum power.

• Laser pulse frequency: In addition to continuous laser beams, pulsed laser beams are also used, which are laser beams that continuously and rapidly switch on and off. Adjust its power by adjusting its duty cycle to achieve some special functions.

• Laser pulse duty cycle: that is, the percentage of time that the pulse laser remains on in one cycle is proportional to the laser power. When the duty cycle is 100%, that is, it is fully on within one cycle, which is a continuous laser.

• Laser power supply: The laser power supply is divided into several parts to provide energy. When needed, some parts are turned off individually to reduce the power of the laser.

• Laser power modulation: In order to match different cutting speeds,special equipment is used to adjust the laser power at any time. For example: when the cutting direction changes, the translation speed of the cutting head will be lower than that of straight cutting. If there is no real-time adjustment of the power in this section, the energy release of this section will be too high and affect the cutting quality; therefore, a modulator is needed to reduce the laser power to meet the needs of corner cutting.

• Auxiliary gas: ejected from the nozzle to protect the cutting head from smoke and dust to improve cutting quality. Although this factor has nothing to do with the laser power and the duration of the current point cut, it is an important factor for metal cutting; there are several different gases available to suit the cutting needs of different materials.