Laser processing control method for film cutting

Abstract

The invention discloses a laser processing control method for film cutting. The method comprises the specific steps of S1, adjusting a laser control signal of a laser, enabling the laser control signal to be kept in a state that the high-level pulse width is constant, and guaranteeing that the energy of light emitted by the laser each time is the same; S2, determining laser irradiation positions according to a film cutting track, and setting the laser irradiation positions to be uniformly spaced; and S3, emitting laser according to the laser irradiation positions at uniform intervals, and enabling laser energy on the cutting track to be evenly distributed. The laser control signal is kept in the state that the high-level pulse width is constant, so that the energy of light emitted by the laser each time is the same; and the laser irradiation positions on the film cutting track are set to be uniformly spaced, and after the laser light with the same energy is irradiated at each laser irradiation position, the laser energy on the film cutting track can be ensured to be uniformly distributed, namely, the consistency of the cutting effect is ensured.

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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