The fiber laser cutting machine is a new type of cutting machine, which has greatly improved in performance and operation. In many aspects of technology, operators should understand. The following article mainly introduces the accuracy control of fiber laser cutting machine drilling technology.
(1) Aperture size control: use a small divergence angle laser (0.001~0.003rad), shorten the focal length or reduce the output energy to obtain a small aperture. For high melting point. The material with good thermal conductivity can realize the machining of tiny holes with an aperture of 0.01~1mm, and the minimum aperture can reach 0.001 mm.
(2) Hole depth control: improve the laser output energy of the fiber laser cutting machine, adopt a reasonable pulse width (the better the material and thermal conductivity, the shorter the pulse width is appropriate), and apply the fundamental mode mode (single mode with Gaussian distribution of light intensity) to obtain a large hole depth. For deep holes with small aperture, it is advisable to use laser irradiation for many times, and use an objective lens with short focal length (15~30mm) to drill holes.
(3) To improve the roundness of laser processing holes: the laser mode adopts the basic mode processing, the focus lens uses the spherical aberration objective lens, and the optical axis of the lens coincides with the optical axis of the laser beam, the workpiece is suitable to deviate from the focus, and the appropriate laser energy can be selected to improve the processing roundness.
(4) Reduce the taper of the hole: generally, the taper of the hole increases with the increase of its aperture ratio. The taper of the hole can be reduced by using appropriate laser output energy or small energy multiple irradiation, short focal length, small lens refractive index and reducing the angle between the incident light and the optical axis.
The precision control and excellent operation of the fiber laser cutting machine drilling technology are very important. After the operators are familiar with the various technologies of a device, the application of various parts of the device will be familiar. I hope that the operation of the drilling technology introduced in this article can be used for reference and help.