As we all know, one of the most important components of the optical fiber laser cutting machine is the laser cutting head, which has the characteristics of high precision and high price. The service life of the laser cutting head does not affect the operating efficiency of the cutting machine, but also affects the production cost and benefits of the factory. Among them, the most common problem affecting the service life of the cutting head is the pollution and damage of the optical lens inside the structure.
Maintenance secret of laser cutting head sealed by laser head manufacturer for a long time -- inside story!
The optical module inside the cutting head is analyzed, which includes a collimating module (including a collimating mirror), a focusing module (including a focusing mirror) and a protective mirror window box (including a protective mirror).
Routine maintenance of laser cutting head
Today we bring to you some of the causes of lens pollution:
1. The optical fiber head in the cutting head is installed incorrectly
2. Poor sealing effect of cutting head
3. Replace the protective mirror window box incorrectly
4. Use of unreasonable cutting head wearing parts
5. Improper operation mode of laser cutting machine
6. Poor maintenance of cutting head
7. Wrong selection of laser cutting process data parameters
Maintenance secret of laser cutting head sealed by laser head manufacturer for a long time -- inside story!
Although it cannot be guaranteed that the cutting head will never be polluted, appropriate preventive measures can slow down the lens aging and minimize the lens loss.
Ourui Laser proposes corresponding solutions for you:
1. Select the correct installation method of optical fiber head. Most installers are quite casual when assembling the cutting head, which makes the installation direction of the optical fiber head tilt, causing careless installation. During the installation, we should try to keep the optical fiber head installed in the cutting head horizontally and locked. In addition, dust shall be avoided during installation, and the operation shall be conducted in a clean environment or in the morning to prevent dust from entering the laser head.
2. For the sealing property of cutting head, even if it is produced according to German technology, it is not possible to guarantee the complete sealing property. Moreover, in the later stage of operation, due to the temperature difference between the interior (relatively high temperature) and the exterior (relatively low temperature) of the cutting head, the imbalance of air pressure and other reasons, dust will enter the cutting head, which will affect its life. Then, the feasible method is to install the respiratory system to maintain the stability of the internal air pressure of the cutting head.
3. Due to the relatively large volume of the protective mirror box, particles are inevitably mixed in the process of replacement. Therefore, when replacing the protective mirror box, be sure to speed up, and use tape or other films to seal the window when quickly removing the mirror box, and carefully complete the replacement.
4. Select qualified protective mirror and "O" type sealing rubber ring to ensure the sealing of cutting head to the greatest extent and prevent dust particles from entering.
5. When operating and using the laser cutting machine, be sure to operate correctly in strict accordance with the equipment instructions and requirements. Reduce the impact of improper operation on the cutting head.
6. The cutting head should be kept clean and dry as far as possible and cleaned regularly.
7. First of all, laser cutting technology can be divided into four categories: vaporization cutting, melting cutting, oxidation melting cutting and controlled fracture cutting. Due to the different parameter data corresponding to different cutting processes, including cutting power, type of plate to be cut, thickness of plate to be cut, and selection of auxiliary gas, careful selection of cutting processes can protect the laser cutting head.
Maintenance of laser cutting head protective mirror
In addition, the cleaning of the laser head protective mirror is mentioned here separately, because the collimating mirror, focusing mirror and other mirrors inside the laser head are generally less likely to be damaged, but the protective mirror needs our frequent maintenance. Now please clean the laser head protective mirror in three parts:
1. The material of Ourui laser protective lens is arsenic zincate, which is brittle and is afraid of falling; Attention shall be paid during disassembly: do not use too much force or collide with hard objects. There is an antireflection film on the surface, which is afraid of pollution, moisture, oil and scratch; Therefore, it is required to provide dry and degreased air in the work. Never handle the lens of the laser cutting machine directly by hand, because skin grease will cause long-term damage to the lens surface. On the contrary, Ourui Laser reminds you that you can operate with gloves and special sets. For smaller lenses, it is more convenient to use optical tweezers or vacuum tweezers. No matter what method is used to clamp the protective lens of the laser cutting machine, it can only be clamped along the non optical surface, such as the frosted edge of the plaque edge.
2. In general, before use and before and after cleaning, it is necessary to check the protection of the lens of the laser cutting machine. Because the size of most pollutants and surface defects is relatively small, our Ourui laser operators often use amplification equipment when checking lenses. In addition to amplification equipment, sometimes we also need to use a relatively bright light to illuminate the optical surface to enhance the specular reflection intensity of surface contaminants and defects, so that pollutants and defects can be found more easily.
3. When cleaning the protective lens of the laser cutting machine, always use clean wiping paper and optical grade solvent to prevent damage by other pollutants. Wiping paper must be moistened with appropriate solvent, and must not be used dry. In consideration of softness, the available wiping paper is cotton wiping paper or cotton ball, lens paper, cotton swab and other applicators.
The daily maintenance and cleaning of the laser head protective mirror will greatly reduce its loss. However, in most cases, other adverse factors accelerate the aging and damage of the protective mirror. Next, Ourui Laser will talk about several common problems of protective mirror and their solutions.
To sum up, as long as we can do a good job in fine points, strictly control and protect the lenses in the cutting head, we can effectively delay the aging of the cutting head and ensure the production efficiency of the equipment.