Selection of cutting fluid in the machining process of CNC centring machine

In the walking machine processing metal cutting process, the correct choice of cutting fluid can improve the productivity of metal cutting and ensure the machining accuracy of the machined material. Each kind of cutting fluid has its own advantages and disadvantages, each has its own use. Therefore, in the centring machine processing of different metal materials need to choose different cutting fluid, so that the cutting fluid and cutting tools can be effectively combined into the metal cutting process.

　　For the more difficult to machine the material and its compatibility with the cutting fluid, we summarise the following scheme for you to provide reference:

Aluminium: soft, easy to cut and stick to cutting tools. If the emulsion is highly alkaline, it will have a chemical reaction with aluminium, causing the emulsion to delaminate. Special emulsion or paraffin-based mineral oil should be used as cooling lubricant.

　　Brass: A large number of fine chips are generated during cutting, which can easily make the emulsion oil turn green. Oil containing active sulphur can discolour the processed material, such as the choice of oil should have filtering equipment.

　　Bronze: produce significant plastic deformation before cutting, can make the emulsion turn green. Such as selecting the oil agent to have filtration equipment.

　　Copper: viscous, cutting produce micro-fine curled chips, can make the emulsion become green, affect the stability of the emulsion, in the role of active sulfur birth stains. If the choice of oil to be equipped with filtration equipment.

　　Malleable cast iron: cutting a large number of micro-fine chemically active abrasive chips. These active chips are like filter media, weakening the activity of the emulsion, and can generate iron soap, so that the emulsion becomes reddish-brown, emulsion stability deterioration. If you use oil, you must use a centrifuge or filter to remove the iron filings.

　　Lead and its alloys: easy to cut, can generate lead soap, destroying the stability of the emulsion. If the use of oil, the oil has a tendency to thicken, to prevent the use of oil containing a large number of fat.

　　Magnesium: generates fine chips when cutting, combustible. Generally do not use water-based cutting fluid, can use low viscosity oil as cutting fluid.

　　Nickel and high nickel alloy: high heat is generated locally during cutting, and chips may be sintered. Heavy duty emulsion or inactive vulcanised oil can be used.

　　Titanium: produces abrasive, combustible chips, prone to work-hardening phenomenon, apply heavy duty emulsified oil or extreme pressure oil.

　　Zinc: cutting surface irregular, difficult to obtain a good finish, and emulsion to generate zinc soap, so that the emulsion separation, should choose special emulsion.