(1) Aperture size control A laser with a small divergence angle (0.001 to 0.003 rad) can be used to shorten the focal length or reduce the output energy to obtain a small aperture. For high melting points. A material with good thermal conductivity can realize micro hole processing with a hole diameter of 0.01 to 1 mm, and the minimum hole diameter can reach 0.001 mm.
(2) The depth control of the hole increases the output energy of the laser, and a reasonable pulse width (the better the material and thermal conductivity, the shorter the pulse width), the basic mode (a single mode with a Gaussian light intensity) can be obtained. Large hole depth. For deep holes with small apertures, multiple lasers should be used to illuminate them with a short focal length (15 to 30 mm).
(3) Improve the roundness of the laser processing hole The laser mode adopts the basic mode processing, the aspherical objective lens for the focusing lens, and the optical axis of the lens coincides with the optical axis of the laser beam, and the workpiece is suitable for deviating from the focus point and selecting appropriate laser energy, etc. Processing roundness.
(4) Reduce the taper of the hole. Generally, the taper of the hole increases with the increase of the aperture ratio. Multiple laser light is applied with appropriate laser output energy or small energy. Short focal length, small lens refractive index, and reduced incident light and light. Measures such as the angle between the axes can reduce the taper of the holes.
In the laser cutting machine using the flying light path, only the cutting head moves in the X and Y directions during the cutting process, and the position of the table is fixed. In addition, there is a fixed-arm type optical path flight beam transmission form, which is called a constant flight path, referred to as a constant light path.
From the driving mode of the equipment, the X and Y axes are selected from the single-side servo motor to configure the corresponding reducer, and the structure is driven by the high-precision rack and pinion; the X-axis is selected by the servo motor to adjust the corresponding reducer, with high precision. The rack and pinion drive structure have a double gear to eliminate the backlash drive mode; the servo motor is equipped with a high-precision ball screw for direct drive, and the disc type large inertia motor is used for direct gear and rack drive, and the linear motor is directly driven. The way of structure. The lasers configured by the equipment should be selected according to the user's processing performance, processing materials, shape, size, etc. The available lasers are available as co2 axis fast current laser, RF board debugging laser, cyclone laser, solid laser and Fiber lasers, etc.