What is cutting fluid? Why use cutting fluid during CNC machining?

I think everyone is watchingCNCYou can already see it during treatment. When cutting, the nozzle next to it sprays an oil-like liquid. In fact, this fluid is cutting fluid.

Cutting fluid is a lubricant used in CNC machine tools. It performs functions such as lubrication, cooling and cleaning. Therefore, cutting fluid plays a very important role in the automated processing of CNC machine tools.

1. The role of cutting fluid

1,lubricant:

Cutting fluids can form oil films on the surfaces of parts and tools and can penetrate even the smallest gaps and metal irregularities. Reduce friction between metals. This can cause the following effects:

① Reduce tool wear and extend tool life.

② Reduce cutting resistance and proceed with less power.

③Avoid edge burrs and improve the precision of the processing surface.

2,cool

Cutting fluids reduce the heat generated during cutting operations and can reach temperatures as high as600-1000℃. Especially for parts with low thermal conductivity such as stainless steel, it is difficult to dissipate heat and the part will become hot.

Using cutting fluid to reduce temperature may result in the following effects:

① Reduce thermal deformation of the tool and extend tool life.

② Prevent thermal deformation of parts and tools and stabilize processing precision.

③ Get high-speed processing.

3cleaning

The jet of cutting fluid can remove the chips generated during the cutting process and clean the workpiece, which can lead to the following effects:

①Prevent chips from adhering and causing scratches on the workpiece.

②Avoid processing defects caused by clogging and chip accumulation.

③Avoid tool damage caused by chip entanglement.

2. Classification of cutting fluids

Cutting fluids can be roughly divided into two types: water-insoluble and water-soluble. Insoluble cutting fluid can be used directly, focusing on lubrication (some also focus on cooling). Water-soluble cutting fluids are generally used after being diluted with water, with emphasis on cooling.

1insoluble cutting fluid

Insoluble cutting fluid is a cutting oil of which oil is the main component and has goodThe “lubrication” function can also effectively prevent CNC machine tools and parts from rusting, and is mainly used for high precision requirements.

Insoluble cutting fluids can be divided into inert and active types. Lightweight and inert cutting of soft metals can effectively improve tool life. The active type is used for difficult-to-machine materials and low-speed processing, such as gear cutting, which can effectively improve the processing precision.

2water soluble cutting fluid

Water-soluble cutting fluid is cutting oil mixed with water and oil. It has good cooling effect and is widely used in high-speed machining in machining centers.

Commonly used water-soluble cutting fluids include emulsion, soluble, and dissolving fluids.

Emulsion is a water-soluble cutting fluid composed of water, oil and surfactant. It is a milky white liquid with large oily particles. It is very versatile and widely used in machining centers.

Water-soluble cutting oil, composed of water, oil, surfactants and soluble substances, is a translucent liquid containing small oil particles. Has excellent cooling and penetration properties.

Solution, a water-soluble cutting oil based on water and soluble substances. The oil particles are very small, the liquid is usually green in color and has excellent cooling and durability properties.