How to prevent freezing of fiber laser cutting machine?1

Recently, the temperature has dropped sharply in many parts of the country, and people have to add clothing, and fiber lasers should also be frost-proof, otherwise they are easily damaged. Especially in an extremely cold climate, the optical part of the fiber laser will form damage that is difficult to repair. Therefore, before the cold wave hits, the editor shared this fiber laser winter antifreeze guide, but you must keep it away!

The basic principles and methods of antifreeze: liquids have a 'freezing point'. When the temperature of the liquid is lower than this 'freezing pointThe volume will become larger during the solidification process, which will 'broke' the pipes and sealing connections of the water cooling system and cause damage.

In order to avoid damage to the fiber laser, output head, and water chiller caused by the solidification of the cooling liquid, there are three solutions:

Option 1: Do not turn off the water chiller at night

When the local power supply will never be cut off, the water chiller will not be turned off at night. At the same time, to save energy, the low temperature and normal temperature water temperature is adjusted to 5 ~ 10℃, to ensure that the coolant is in a circulating state and the temperature is not lower than the freezing point.

Option 2: Drain the cooling liquid

Cool the laser, laser output head, and water cooler after daily use The liquid is drained. The specific cooling water emptying method and pipeline design method

Close the red marked valve, open the yellow marked valve, and pass in clean water not higher than 0.4Mpa (within 4 kg) Compress air or nitrogen until no water blows out from the water outlet. Finally, open the drain of the water cooler to empty the remaining water in the final water tank.

It should be noted that all the cooling water in the fiber laser, laser output head, processing head and water chiller must be cleaned to effectively protect the entire set of water cooling pipelines and related components!

Scheme 3: Use antifreeze as coolant

When the use environment is often power cut and does not have daily coolant drain Under the conditions, you must use antifreeze. The basic liquid of antifreeze is generally composed of alcohol and water. It requires high boiling point and flash point, high specific heat and conductivity, low low temperature viscosity, not easy to foam, and does not corrode metal parts, rubber hoses, etc. When selecting or deploying antifreeze, its freezing point should be 5°C lower than the lowest temperature of the environment in which it is used.

The choice of antifreeze

1. Use professional brand special antifreeze instead of ethanol.

2. If the professional brand is not convenient to buy, you can also buy a large bottle of car antifreeze without adding water at a regular gas station or regular supply store nearby, and use it directly Fiber laser water cooling system.

Any antifreeze can not completely replace deionized water, and can not be used for a long time throughout the year. After winter, the pipeline must be cleaned with deionized water or purified water, and deionized water or purified water must be used as the coolant.