CN201089064Y - High-speed YAG solid-state laser deep and wide engraving device - Google Patents

Abstract

The utility model relates to a high-speed YAG solid-state laser deep-width engraving device, which belongs to the technical field of laser processing. The red indicator light emitted by the He-Ne laser (1) is reflected by the first 45-degree helium-neon red light total reflection mirror (2) and the second 45-degree helium-neon red light total reflection mirror (3) in turn, and then passes through two identical And symmetrically placed, the pumping cavity (5) whose working substance is Nd:YAG crystal rod, the laser output from the optical resonator (9) enters the focusing head (11) after passing through the beam expander (10), and in the focusing head After the laser passes through the focusing lens (12) and the protective glass (13) in sequence, it is focused on the engraving material. On the side wall of the focusing head, there is a hole connected to the cavity in the focusing head and used for feeding pure oxygen. Auxiliary gas nozzle connection (14). It realizes one-time high-speed engraving of patterns with large depth and width on low-carbon steel metal materials, which meets the needs of industrial production.

Description

High-speed YAG solid-state laser deep and wide engraving device

technical field

The utility model relates to a high-speed YAG solid-state laser deep-width engraving device, which belongs to the technical field of laser processing.

Background technique

Laser engraving is an engraving method that uses high-energy-density laser beams to act on the target to cause physical or chemical changes on the target surface to obtain visible patterns. Compared with the traditional engraving process, laser engraving has obvious advantages: engraving is narrow and saves materials; only positioning is required without clamping, scribing, degreasing and other preparation processes; the workpiece has no mechanical stress and small deformation; non-contact processing , little pollution, no abrasion; can carve fragile and brittle materials, as well as extremely soft and hard materials; fast, can travel in any direction, can start from any point, clear and permanent engraving, strong anti-counterfeiting function, and good economic benefits ;Easily controlled by numerical control or computer automation, and can be operated by multiple stations. In recent years, with the improvement of the reliability and practicability of lasers, coupled with the rapid development of computer technology and the improvement of optical devices, the development of laser engraving technology has been promoted, and laser engraving technology has been widely used.

At present, Nd:YAG marking machines using Q-switched galvanometer scanning occupy a large market. This marking method is fast and flexible, and the marked pattern is smooth and beautiful, but it can only mark very shallow and narrow marks on the surface of the material. If you need to mark a deep and wide pattern on the material, especially the metal material, you need to mark it many times, which will take a long time, the efficiency is extremely low, and it is far from meeting the requirements of industrial production.

Utility model content

Based on the advantages of laser engraving, and aiming at the shortcomings of Q-adjustment vibration scanning marking machines on the market, the utility model proposes an industrial Nd:YAG high-speed laser deep engraving device, which uses shallow cutting to mark materials, which can be used at high speed It can engrave patterns with large depth and width on low-carbon steel metal materials at one time, which solves the problem that the Q-switching galvanometer scanning Nd:YAG marking machine on the market cannot mark low-carbon steel metal materials at one time at high speed The technical problem of producing patterns with larger depth and width.

In order to achieve the above object, the utility model adopts the following technical solutions. It mainly includes He-Ne laser 1, the first 45-degree helium-neon red light total reflection mirror 2, the second 45-degree helium-neon red light total reflection mirror 3, pump cavity 5, light 5 resonant cavity 9, beam expander 10 and focusing head 11. Since the Nd:YAG laser is in the infrared invisible band, the entire optical path of the laser uses the red light emitted by the He-Ne laser 1 as the indicator light, and the red indicator light emitted by the He-Ne laser 1 passes through the first 45-degree helium-neon red light in turn. After reflection by the total reflection mirror 2 and the 45th helium-neon red light total reflection mirror 3, the optical path rotates 180°, and then passes through two identical and symmetrically placed pumping chambers 5 whose working substance is Nd:YAG crystal rods, He- The Ne red light and the Nd:YAG laser keep strictly concentric output, the laser output from the optical resonator 9 passes through the beam expander 10 and then enters the focusing head 11, in the focusing head 11, the laser passes through the focusing lens 12 and the protective glass 13 in turn, Focus on mild steel metal material. On the side wall of the focusing head 11, an auxiliary gas nozzle interface 14 for feeding pure oxygen is provided, which communicates with the cavity in the focusing head 11 and has a constant relative position.

Beneficial effects of the utility model: due to the oxidative combustion reaction between pure oxygen and low-carbon steel materials, deep and wide engraving can be realized on low-carbon steel metal materials. The pattern with a larger width is suitable for the needs of industrial production.

Description of drawings

Fig. 1 is the schematic diagram of the utility model;

1. He-Ne laser 2. The first 45-degree He-Ne red light total reflection mirror 3. The second 45-degree He-Ne red light total reflection mirror 4. 1064 nanometer high reflection mirror 5. Pump cavity 6. Continuous krypton lamp 7. Nd:YAG crystal rod 8, output mirror 9, optical resonant cavity 10, beam expander mirror 11, focusing head 12, focusing lens 13, protective glass 14, auxiliary gas nozzle.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

In Fig. 1, the laser part adopts continuous krypton lamp, double-lamp pump, double-rod series connection and symmetrical parallel plane optical resonant cavity to increase the output power and ensure a smaller beam divergence angle and narrower spectral lines during high-power output. width, and stable laser output with large modulus volume. The working material of the laser is φ6mm×120mm high-quality Nd:YAG crystal rod 7 doped with 0.9%. The surface of the crystal rod is frosted to improve the absorption of pump light energy by the crystal rod. The two ends of the crystal rod are optimized by coating treatment to ensure a better output of the laser. The pump lamp adopts a φ5mm×120mm continuous krypton lamp 6. The gas composition ratio and air pressure in the lamp are configured according to the requirements of the laser power supply and luminescence spectrum. The lamp wall is a cerium-doped quartz glass tube, which can absorb harmful short-wavelength ultraviolet light below 400nm This translates to a spectrum that Nd:YAG crystals can absorb for increased power output. The pump cavity is a double ellipse metal cavity 5, and the inside of the cavity is entirely gold-plated to improve the reflectivity, so that the light energy can be fully absorbed by the crystal rod. The whole optical path system uses He-Ne red light 1 as the indicator light. The red light emitted by the He-Ne laser 1 is reflected by the first 45-degree red light total reflection mirror 2 and the second 45-degree red light total reflection mirror 3, and then rotates 180 degrees. The entire optical path is collimated, and the He-Ne red light and the Nd:YAG laser are strictly concentric. Two double-lamp pumping chambers 5 with identical structures are placed symmetrically. The Nd:YAG laser oscillates and outputs between the high-reflection mirror 4 of the optical resonator 9 and the output mirror 8 of the resonator, and is expanded and assisted by the beam expander 9. The focus head of gas pure oxygen acts on the low-carbon steel material to realize deep and wide engraving on the low-carbon steel material. The purpose of laser beam expansion is to focus the focal spot with a smaller focus and a longer depth of focus, which is more conducive to industrial processing.

Claims (1)

1. the dark wide engraving machine of high speed YAG Solid State Laser is characterized in that: mainly include He-Ne laser instrument (1), the one 45 degree He-Ne ruddiness completely reflecting mirror (2), the 2 45 degree He-Ne ruddiness completely reflecting mirror (3), pump cavity (5), outgoing mirror (8), beam expanding lens (9) and focus head (10); The red pilot light that He-Ne laser instrument (1) sends is successively through the back light path Rotate 180 ° of the one 45 degree He-Ne ruddiness completely reflecting mirror (2) and the 2 45 degree He-Ne ruddiness completely reflecting mirror (3) reflection; just the same and symmetrical placement by two again; operation material is the pump cavity (5) of Nd:YAG crystal bar; after passing through beam expanding lens (10) successively, the laser of optical resonator (9) output enters focus head (11); in focus head (11); laser passes through condenser lens (12) successively; behind the cover glass (13); focus on the material for carving on it, the sidewall of focus head (11) is provided with cavity in the focus head (11) and is connected; be used to feed the assist gas nozzle interface (14) of pure oxygen.

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