A CO2 laser cutting power control method and system

Abstract

The invention discloses a CO2 laser cutting power control method. The CO2 laser cutting power control method comprises the following steps that S1, the maximum speed, the minimum speed, the maximum power corresponding to the maximum speed and the minimum power corresponding to the minimum speed of a cutting path are preset; S2, after cutting is started, a motion controller collects the current cutting motion vector speed; S3, the current cutting power is calculated according to the maximum speed, the minimum speed, the maximum power corresponding to the maximum speed, the minimum power corresponding to the minimum speed and the current cutting motion vector speed; and S4, cutting is conducted according to the current cutting power. According to the CO2 laser cutting power control method, the cutting power of a laser tube can be precisely controlled in real time, and thus the process requirement for the ablation uniformity of the cut workpiece can also be met when the cutting speed is changed.

Description

technical field [0001] The invention relates to the field of laser cutting, in particular to a CO2 laser cutting power control method and system. Background technique [0002] The CO2 laser cutting control system uses a focused high-power laser beam to irradiate the workpiece, so that the irradiated material is rapidly melted or ablated, and at the same time, the desired graphic shape is processed on the workpiece by setting a specific trajectory. The power of the CO2 laser tube is controlled by the CO2 laser, and the motion controller controls the output power of the CO2 laser tube by controlling the CO2 laser. Usually, the interface used by CO2 to control the laser power is an analog quantity (0-5V). So as long as the motion controller outputs an analog value (0~5V) to the CO2 laser, the power of the CO2 laser tube can be indirectly controlled. [0003] The existing solution is mainly to output a voltage of 0-5V to the CO2 laser by externally connecting a variable resisto...

AI Technical Summary

Problems solved by technology

The biggest disadvantage of this solution is that in a cutting movement, the power of the CO2 laser tube is a constant value, while the speed of the cutting path is constantly changing, which leads to a serious laser ablation of the workpiece material at places with low speed, while Where the speed is high, the degree of laser ablation of the workpiece may not be sufficient to meet the process requirements of cutting workpiece ablation uniformity

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