A study of laser direct-part marking of 2D code on the aviation aluminum alloy part

Laser Direct Part Marking (DPM) technology is a marking technology that has proved to be feasible in the industrial environment, and can be highly automated and environmentally friendly. It has become the preferred method for completing product marking in industrial product traceability. In this paper, MOPA laser marking system with flexible control and wide adjustment range of laser parameters is used for experiment. According to ISO/IEC TR 29158 bar code technology standards, the influence of laser processing parameters(such as laser peak power, laser pulse energy, laser power, filling space, scan speed, etc.) on the quality (such as symbol level, symbol contrast, print growth, etc.)of laser direct marking DM symbol is studied. By optimizing the laser processing parameters, high-quality DM symbol on the surface of AL2024 is realized.