Do you know how to protect the laser from freezing when the temperature drops?
November 16, 2021
At present, most areas in the country have experienced the strongest cold wave since the autumn, and the "cliff-type" cooling is obvious, and different seasons have different effects on the use of lasers. The cold winter is the biggest test, the laser operating environment temperature should be between 5-45 ℃. If it exceeds this range, the laser may be unstable, and serious damage may even cause the laser to cause unnecessary economic losses. So, how to protect the laser from freezing in winter? This will teach you some tricks to ensure that your laser can run more smoothly and efficiently in the cold winter.
1: Empty the circulating water circuit of the chiller
When the laser equipment production is completed or the holiday is shut down, we can drain the water inside the circulating waterway. When the cutting equipment is needed, add the cooling water to the chiller.
1. Open the drain valve of the chiller and drain the water in the water storage tank. 2. After the water in the water tank is empty, there will be residual water in the water pipe or pipeline. First, disassemble the inlet and outlet pipes, and use clean compressed air or nitrogen less than 0.3MPA to blow out the remaining water in the laser, water pump, and cutting head. It is important to ensure that there is no water in the pipeline. Otherwise, the water droplets on the tube wall may form ice crystals, which may damage the internal components of the laser under the push of the water flow.
2: The water in the chiller keeps circulating
In the workshop, under the condition of absolutely no power failure, the chiller can be kept at night to keep the water circuit in a circulating state. At the same time, in order to save energy, the temperature of the optical fiber can be adjusted to about 10°C to ensure that the cooling water does not fall below the freezing point. But when the water flows in extremely cold, it may freeze, which may cause damage to the equipment. (In this case, it is used according to the local environmental impact).
3: Use antifreeze as coolant
1. If there are frequent power outages or current limited power supply in the area, the water cycle cannot be maintained. Then we can add antifreeze to solve the problem. The antifreeze can prevent hidden dangers such as the laser, water pump and cutting head from freezing when the coolant is shut down in the cold winter.
2. When choosing antifreeze, you must pay attention to the quality. If the antifreeze is of poor quality, it will not be able to prevent freezing. The pros and cons of antifreeze are mainly measured in the following two points: One is the antifreeze effect, the freezing point of water is 0℃, ordinary antifreeze can reach -40℃, and high-quality antifreeze should be able to reach about -60℃ This is an important indicator of the quality of the antifreeze; the other is the boiling point of the antifreeze, the boiling point of water is 100 ℃, and the antifreeze should reach at least 108 ℃ above, that is to say, the lower the freezing point, the higher the boiling point. The greater the temperature difference, the better the quality of the antifreeze. Different brands and different types of antifreeze have different production ingredients, so it is forbidden to mix antifreeze.
3. When adding antifreeze liquid, it is necessary to check whether the antifreeze liquid is compatible with the cutting equipment, operate strictly in accordance with the ratio of the instruction manual, and check whether it is suitable for the local use environment. Any antifreeze can not replace purified water or deionized water, and cannot be used for a long time. After winter, the entire circulation pipeline must be cleaned with purified water or deionized water, and deionized water or purified water should be used as the coolant.
4. Precautions for use
After using the antifreeze, such as during holidays or long-term shutdowns, please empty the water in the entire circulating water circuit according to the first: emptying the circulating water circuit of the chiller.