Principle and structure of fiber laser marking machine

The principle of fiber laser marking machine is to use a laser beam to mark durable symbols on the surface of various materials. The effect of marking is to expose the deep material through the evaporation of the surface material, or to 'engrave' traces through the chemical and physical changes of the surface material caused by light energy, or to burn some materials through light energy, showing the required etching. images, text.

Laser symbol printing is finished by fiber laser marking machine. The basic principle is that a high-energy continuous laser beam is generated by a laser generator. When the laser acts on the printing material, it is in the ground state. The atom transitions to a higher energy state; the atom in the higher energy state is unstable and will quickly return to the ground state. When the atom returns to the ground state, it will release additional energy in the form of photons or quantum, and is converted by light It can be converted into heat energy, so that the surface material melts or even vaporizes in an instant, and then forms a graphic symbol.

1. Laser generator

The following will take the krypton lamp laser marking principle system as an example to illustrate the principle of the laser generator. After the krypton lamp is energized, after breaking down the krypton gas in the krypton lamp with a high voltage of 20kV, the power supply automatically converts the output voltage to 100V (5A), maintaining the continuous arc discharge of the krypton lamp. In the laser generator, the krypton lamp is located at one focal point of the elliptical concentrating cavity. After the arc light generated by the krypton lamp is reflected by the concentrating cavity, it is all collected on the other focal point-crystalline yttrium aluminum garnet (YAG). , YAG absorbs the pump light to form a continuous laser with a wavelength of 1060 nm. The continuous laser oscillates back and forth between the front mirror and the rear mirror perpendicular to the optical axis in the resonator, and the early mirror output.

2. Principle of laser marking machine

The RF driver (RFDriver) controls the switching of the Q-switch. Under the action of the Q-switch, the continuous laser becomes a peak power of 110kW After the pulsed light passing through the aperture reaches the threshold, the output of the resonator reaches the beam expander, the beam is expanded by the beam expander and then transmitted to the scanning mirror, and the scanning mirror in the X-axis and Y-axis directions is driven by the servo motor to rotate Carry out light scanning, at the end, after the power of the laser is further expanded by the plane collection field, it is assembled on the working plane for marking. The whole process is controlled by the computer program.

The structure of the fiber laser marking machine

1. The driving power supply of the pump source laser of the fiber laser

2. The laser marking card , also known as fiber laser controller, which is used to control the working state of the fiber laser, at the same time, it can control the movement of the galvanometer system, and also control the output of the fiber laser according to a certain set of power, detailed marking software and marking software For the card manual, please refer to the website of Laise Laser or consult our company's after-sales staff by telephone.

3. Digital galvanometer marking head (some models use analog galvanometers), and the galvanometer system is fiber laser marking It is an important part of the marking system. The laser follows the movement of the digital high-speed galvanometer to engrave a specific two-dimensional trajectory set by the marking card software on the product parts to be marked. The digital and analog galvanometers are composed of two sets of high-precision angle servo motors and motor drive boards, as well as high-reflection fiber wavelength reflectors, one set to control the X axis and the other set to control the Y axis. Under the control of the standard card and the computer, the angles of the two mirrors can be rotated respectively, so that the laser beam is reflected by the two mirrors and focused on different positions of the workpiece by the field lens. Control the laser beam of the optical fiber to mark the set text or pattern on the workpiece to be marked

4. Field lens, through which the fiber laser beam is focused to the surface of the workpiece, so that the energy is strong enough, This optical accessory controls the marking format.

5. Housing part

The fiber laser marking machine is the most advanced laser marking equipment in the world today, with good beam quality, Small size, fast speed, long working life, flexible and convenient installation and maintenance-free. Widely used in integrated circuit chips, computer accessories, industrial bearings, clocks, electronic and communication products, aerospace devices, various auto parts, home appliances, hardware tools, molds, wires and cables, food packaging, jewelry, tobacco and military affairs, etc. Field graphics and text marking, as well as high-volume production line jobs.

Brands of fiber laser marking machine

1. To choose a company with strength and qualification, a company with strength and qualification will provide a series of pre-sale, in-sale and after-sale services Serve. Our Technology Co., Ltd. is a reliable company with qualifications, quality and service. We operate various laser marking machines, laser cutting machines, carbon dioxide marking machines, water-cooled laser marking machines, portable laser marking machines, etc. The company's films are exported to overseas and all over the country, but the surrounding areas are mostly Yantai, Weifang, Jiaozhou, Zaozhuang, Pingdu, Laizhou and other regions. For some small workshops or manufacturers that do not provide manuals, it is recommended not to consider them. Although the price is relatively cheap, the after-sales service is far from enough, and the quality is not guaranteed.

2. Mechanical performance, fiber laser marking machine has the characteristics of high processing accuracy, high efficiency, fast speed, high efficiency, high degree of automation, simple operation, etc. Because there are domestic and imported points, Therefore, the price of imported fiber laser marking machine is relatively expensive 10,000-20,000 yuan, but the performance is relatively stable, and the domestic price is cheap; if the effect of the product is not enough, then the domestic one can be selected.

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