Shandong area has entered the “cold wave” weather, and the temperature has gradually decreased; considering that the cold weather will cause great damage to the laser cutting machine equipment, we must pay attention to the antifreeze work of the laser cutting machine equipment in winter. Today, the editor of Bloer will tell you how to freeze the laser cutting machine equipment in winter.
1. Basic principles and methods of antifreeze
Liquids have a “freezing point”. When the temperature of the liquid is lower than this “freezing point”, it will solidify to form a solid, while the volume of deionized water or distilled water will become larger during the solidification process, which will “broke” the water cooling tube and the sealed connection. damage. In order to avoid damage to the laser tube, output head, and water cooler caused by the solidification of the cooling liquid, there are three solutions as follows:
1) In the case of local power failure, do not turn off the water chiller at night. At the same time, for energy conservation, please adjust the low and normal temperature water temperature to 5-10℃ to ensure that the coolant is in a circulating state and the temperature is not lower than the freezing point ；
2) When the equipment is not used for a long time, drain the coolant in the laser and the water cooler. The following is the drainage method:
Drain the water, and then insert the air gun into the water outlet to inflate and drain the water. After the water pump is exhausted, the drain screw is removed and the water is released, and then it is installed;
3) Use antifreeze as the coolant: when the use environment is often power-off and does not have the conditions for the daily coolant to be drained, antifreeze must be used;
The basic liquid of antifreeze is generally composed of alcohol and water, which requires high boiling point and lightning, high specific heat and conductivity, low low temperature viscosity, not easy to foam, and does not corrode metal parts, rubber hoses, etc. When selecting and mixing antifreeze, its freezing point should be about 5°C lower than the lowest temperature of the operating environment.
Second, the choice of antifreeze
Use the special antifreeze of professional brand, do not use ethanol instead.
It is recommended to use foreign brands such as DowthemSR-1 products represented by Dow Chemical in the United States or CLARIANT brand. There are two types of antifreeze suitable for laser systems:
1) Antifrogen®N ethylene glycol—water type;
2) Antifrogen®L propylene glycol—water type;
Domestic brands recommend LM series products represented by Chaoyang Sunshine Chemical.
Note: Any antifreeze can not completely replace deionized water and cannot be used for a long time throughout the year. After winter, the pipeline must be cleaned with deionized water or distilled water, and the deionized water or distilled water must be used as the coolant.
If possible, we still recommend improving the electricity environment, keeping the water chiller from shutting down, or upgrading the cooling water circuit design to make daily cooling water emptying easier and faster.
The above are several measures taken by Shandong metal laser cutting machine to prevent freezing. Please regularly maintain the metal laser cutting machine to achieve the best work efficiency.