Laser cutting equipment is generally composed of lasers, computer software and hardware, numerical control cabinets, worktables, rotating shafts, linear motors, cutting heads and other components. Each component is an indispensable part of the equipment. As an important part of cutting work, the cutting head directly Affect cutting efficiency and quality. It is mainly composed of nozzle, focusing lens and focus tracking system. The forms of nozzles mainly include parallel, convergent and cone forms. The following precision laser cutting equipment manufacturers explain in detail the composition and maintenance of the laser cutting head.
First look at the composition of the laser cutting head?
The specific composition of the laser cutting head consists of collimation components, focusing components, protective mirror box, sensor and control box, cutting nozzle and other parts. The function of the collimation component is to converge the divergent light transmitted from the optical fiber, and straighten or collimate it. The focusing component focuses the collimated laser beam, and the focus position can be changed through the focusing part of the focusing component to meet the needs of cutting different materials and different thickness plates. The protective mirror box is used to isolate the outside world from the internal optical path of the cutting head, to ensure the sealing of the optical path, to prevent dust and impurities from entering the optical path, and to prolong the service life of the fiber optic cutting head. The sensor and control box keep the distance between the cutting head and the workpiece surface stable, ensuring the best cutting quality. The cutting nozzle is installed at the front end of the cutting head, which is the exhaust channel for the laser beam and auxiliary gas. The auxiliary gas forms a high-speed airflow after passing through the inner cavity of the cutting nozzle. Blow away the molten material to achieve the purpose of cutting.
To use the energy of the laser beam for cutting, the original beam emitted by the laser must be focused through the lens to form a spot with high energy density. The power density at the focal point is the highest, the longer the focal length of the lens, the larger the focal spot, and the lower the power density, but the depth of focus is large and the operating tolerance is large.
The focus tracking system of laser cutting equipment is generally composed of a focus cutting head and a tracking sensor system. The cutting head is composed of light guide focusing, water cooling, air blowing and mechanical adjustment; the sensor is composed of sensing element and amplification control part. There are mainly two forms of tracking systems, one is capacitive sensor tracking system, also known as non-contact tracking system. The other is an inductive sensor tracking system.
Every part of the laser cutting head needs regular maintenance.
1. First of all, it is necessary to clean the dust regularly, first with a brush to clean the dust, and then use a dust-free cloth with a small amount of alcohol to clean the entire appearance of the cutting head;
2. Check whether the light beam is ejected from the center of the nozzle before starting the machine for cutting each time, otherwise, please adjust the light again for correction.
3. Check the roundness and cleanliness of the nozzle before cutting, and clean the nozzle with alcohol;
4. Check whether the protective lens is clean every day, otherwise, use isopropanol or analytical alcohol (above 99.5% alcohol) to clean the protective lens without water stains.
5. Check the ceramic ring, SMA wire, SMA pin, and preamplifier every day for looseness and foreign objects, please tighten and clean them.
In short, the related parts of the cutting head must be maintained regularly and regularly to ensure the normal operation of the equipment and high cutting quality. For more knowledge about the maintenance of various parts of laser cutting equipment, please feel free to come to our official website to learn!
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