Laser hole-making device based on direct-current electric field and axial magnetic field

Abstract

The invention provides a laser hole-making device based on a direct-current electric field and an axial magnetic field. The laser hole-making device comprises an electric field generating unit, a magnetic field generating unit and a workpiece rotating unit. The electric field generating unit comprises two electrode plates located on the left and right sides of a workpiece. The magnetic field generating unit comprises a first magnet located above the workpiece and a second magnet located below the workpiece and further comprises a lifting device controlling the heights of the first magnet and the second magnet. Whether the workpiece is driven by the workpiece rotating unit to rotate in the hole-making process or not is selected according to the need, while laser hole-making is conducted, the magnetic field generating unit generates the magnetic field perpendicular to the workpiece, the electric field generating unit generates the electric field in the horizontal direction, and a coupling energy field generated by the magnetic field generating unit and the electric field generating unit acts on the workpiece. According to the laser hole-making device, motion, forms, density and distribution of plasmas in the laser hole-making process are influenced through the additional electric-magnetic coupling energy field, thus the hole-making quality is improved, and the hole-making efficiency is improved.

Description

technical field [0001] The invention relates to the field of laser manufacturing and processing, in particular to a laser hole-making device based on a DC electric field and an axial magnetic field. Background technique [0002] Laser drilling is one of the main research and application directions in the field of laser processing. In the process of laser drilling, the surface of the workpiece is irradiated with a pulsed laser beam. Because the energy density of the focused laser beam is extremely high, the temperature at the focal point will instantly reach thousands of degrees Celsius. Under the action of this high temperature, the workpiece material will be quickly Melting and vaporization, ejected under the action of high-pressure steam to form small holes. [0003] Compared with other micro-hole processing methods, laser drilling has fast processing speed, high economic benefits, wide range of processing materials, non-contact processing, no pollution, and can process s...

AI Technical Summary

Problems solved by technology

However, in the process of high-power laser drilling, the high-temperature plasma above the workpiece will shield the laser through absorption, scattering and refraction, which will not only reduce the utilization rate of the laser, but also affect the formation of micro-holes. In severe cases, the plasma Shielding makes the hole making process impossible

Images