A laser processing control method for film cutting

Abstract

The invention discloses a laser processing control method for film cutting. The specific steps of the method are as follows: S1: adjust the laser control signal of the laser to keep the laser control signal in a state of constant high-level pulse width, so as to ensure the laser The energy of each light output is the same; S2: Determine the laser irradiation position according to the film cutting trajectory, and set the laser irradiation positions to be evenly spaced; S3: The laser light is emitted according to the evenly spaced laser irradiation positions, so that the cutting path is on the cutting track. The laser energy is uniformly distributed. By keeping the laser control signal in a state of constant high-level pulse width, the energy of the laser light is the same each time; After irradiating the laser with the same energy, it can ensure that the laser energy on the film cutting track is evenly distributed, that is, the cutting effect is consistent.

Description

technical field [0001] The invention belongs to the technical field of laser processing, in particular to a laser processing control method for film cutting. Background technique [0002] Film cutting is the processing of film materials by laser. In essence, it is to control the laser to output pulse lasers one by one for dotting processing, such as figure 1 As shown, when the points are connected, the effect of cutting the material can be achieved. [0003] The laser single-point power is affected by the high-level pulse width time of the control signal, and the superposition degree of the light spot is related to the frequency of the control signal. In actual processing, the machine movement is often accompanied by acceleration and deceleration. In order to keep the laser energy on the cutting track evenly distributed , different power control signals need to be used at different speeds to maintain uniform energy distribution. Currently, the commonly used power following ...

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Problems solved by technology

However, the actual output power change of the laser and the duty cycle change of the control signal are in a nonlinear relationship, so the relationship between the speed control and the duty cycle of the laser control during the processing is not linear, and this nonlinear relationship is not conducive to laser control. Due to the adjustment of the duty cycle in the process, it is difficult to ensure the uniformity of the laser energy at each point on the cutting track

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