How to adjust the laser cutting machine when there are stripes on the cutting surface of the work-piece？

When laser cutting machine cuts metal materials, there will be corrugated sections. Eliminating section stripes is one of the research contents to improve the quality of laser cutting. The pressure of the auxiliary gas flow is affected, the pressure of the auxiliary gas flow increases, the longitudinal first-class fringe area plus spacing changes randomly, and the second-class fringe spacing decreases obviously; The width of the first stripe gradually increases, the width of the third stripe gradually decreases, while the width of the second stripe remains basically unchanged.

Due to the stripe wavelength size between shape error and roughness, and the change of surface aggregate shape, the roughness increases, the stress concentration decreases, resulting in low cutting accuracy and cutting quality. The stripe types are divided into longitudinal stripe and transverse stripe. According to the characteristics of longitudinal stripe, the longitudinal stripe is divided into two categories, Transverse grain area (hereinafter referred to as a stripe area) close to the upper surface of the plate, the transverse stripes are dense, the width and depth are stable, and there are no obvious defects; the longitudinal stripes close to the upper surface of the plate, with poor periodicity, different depth and length, and do not penetrate the whole section are defined as longitudinal class I section stripes; the longitudinal stripes that penetrate the whole section and show strong periodicity and regularity in morphology are defined Two types of longitudinal stripes.

The influence of cutting technology on the fringes the influence of laser power increases, the longitudinal first-class fringe spacing changes randomly, and the longitudinal second-class fringe spacing decreases obviously; The width of the transverse stripe gradually increased, and the three stripe area gradually decreased, while the two stripe area remained basically unchanged.

The transverse stripes are divided into 3 zones according to their morphological characteristics and distribution rules. The transverse two section stripe area (hereinafter referred to as the two stripe area) in the middle of the whole section belongs to the transition area. The transverse stripes are dense, the width and depth are relatively stable, and there are slight defects; the transverse three section stripe area (hereinafter referred to as the three stripe area) is at the bottom of the whole section, the transverse stripes are relatively scattered, the width and depth fluctuate greatly, and there are obvious defects.

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