Laser punching is the earliest practical laser processing technology

Laser punching is a laser processing technology that punches holes through a high power density pulsed heat source (lower than laser cutting). The formation of the aperture can be achieved through single or multiple pulses.

In the punching process, a sufficiently large hole is first prepared using the punching mode so that the subsequent cutting process starts from here. The drilling or penetration process requires a repetitive pulsed laser beam with high peak power and a high air pressure. After the workpiece is penetrated, the laser beam is reduced by peak power or even converted to pulse-free mode.

Solid-state laser wavelengths can achieve high-intensity pulse output, so they are more suitable for laser drilling, such as laser drilling, Nd:YAG lasers, Nd:glass lasers, and Nd:ruby lasers.

CO2. lasers are generally used to open non-metallic materials such as ceramics, composites, plastics, or rubber. Metal laser drilling requires pulsed lasers with a beam focusing power density of 10^5W/mm^2 (6.5W/in.^2脳10^7W/in.^2) or more.

Focusing laser beam

In laser punching mode, the pulsed laser peak power beam needs to be focused to a spot with a diameter of 0 using a short focal length lens. The power density level required for drilling a hole is 6 mm.

The low divergence of the laser beam can be achieved by a specific laser resonator. By changing the aperture of the focusing device, the control of the beam diameter can be achieved. Therefore, the aperture can be used to increase the energy density of the focused beam and the intensity distribution of the beam.

Advantages of laser drilling technology

Laser drilling has most of the advantages of laser cutting. The laser beam intake and punching only need to form a certain angle between the beam and the material surface, which effectively avoids the impact and crushing events caused by structural interference during the machining process.

Other advantages of laser drilling

1. Short drilling time

2. Strong automation adaptability

3. Can be used to penetrate difficult materials

4. Compared with mechanical drilling, there is no mechanical wear between the workpiece and the drilling process

Laser punching is the earliest practical laser processing technology and one of the important application fields of laser processing. Laser punching is mainly used for copper, zinc, aluminum, stainless steel, heat-resistant alloys, nickel-based materials, copper, zinc, aluminum, stainless steel, heat-resistant alloys, nickel-based alloys, titanium, platinum, ordinary hard alloy magnetic materials and non-metallic materials, artificial gems, diamond films, ceramics, rubber, plastics, glass, etc.