Using liquid nitrogen for low-temperature (ultra-low temperature) cutting is a method of using liquid nitrogen to make the workpiece, tool or cutting area in a low-temperature cooling state for cutting.

The machining of mechanical materials is closely related to their mechanical properties, which often vary with temperature. For example, when the temperature increases, the hardness of the material decreases and the strength decreases; when the temperature decreases, the material becomes brittle and the plasticity decreases. Some metal materials have obvious cold brittleness, that is, when the temperature decreases to a certain critical value, the material has no effect. The characteristic of brittle fracture caused by obvious plastic deformation. When the material is cold and brittle, its toughness is greatly reduced, resulting in a sharp reduction in plasticity, and of course the work required for deformation will also be reduced. It is precisely by using the low temperature brittleness and low temperature medium of the material that the low temperature cutting technology has three main characteristics, one is to improve the machinability of difficult-to-machine materials; the other is to improve the machining accuracy and surface quality of the workpiece; the third is to prolong the tool life. This is mainly because the low working temperature improves the machinability of the material, the cutting force is reduced, the cutting heat is quickly taken away, and the tool always works at a lower temperature.

Guangzhou Huilin Air Separation Equipment Co., Ltd. specializes in the production of various types of liquid nitrogen generators, PSA nitrogen generators

Guangzhou Huilin Air Separation Equipment Co., Ltd., specializing in the production of oxygen generators