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The use of cutting oil in precision machining

 In precision machining, a very important thing is used when machining parts, and that is machining oil. Before this, there are two kinds of diesel and cutting oil in machining. Then after the experiment, it was found that cutting Oil is much better than diesel. Cutting oil contains extreme pressure anti-wear agents, rust inhibitors and other additives. 

Depending on the application, some will add very good anti-wear agents, but diesel does not have these, so choose when machining Cutting oil is the best choice at the moment. So what kind of material is matched with what kind of cutting oil? Today we will talk about it. Choose different cutting oils according to the required material of the workpiece. 

The cutting oil will produce oil mist and is not conducive to observing the processing conditions. Be careful when doing this. For workpieces of different materials, the cutting oil used is mostly different, such as cold oil, hot oil, and so on. The following precision machining manufacturers have some instructions on different materials with different cutting oils, which are for your reference only.

The physical and chemical properties of the processed materials are different, reflecting new problems such as the difficulty of cutting and the compatibility with cutting fluid in the cutting operation. The materials that are more difficult to process and their compatibility with cutting fluids are briefly introduced as follows.

  • Aluminum: Soft, easy to stick to cutting tools. Emulsions, such as strong alkalinity, can react chemically with aluminum and cause emulsion layering. Should use special emulsion or paraffin-based mineral oil as cooling lubricant.
  • Brass: A lot of fine chips are produced during cutting, which can easily make the emulsified oil green. The oil agent containing active sulfur can change the color of the processed material. For example, the oil separator must have filtering equipment.
  • Bronze: Significant plastic deformation occurs before shearing, which can make the emulsion green. Such as oil selection agent must have filtering equipment.
  • Copper: Tough, finely curled chips are produced during cutting, which can turn the emulsion into green, affect the stability of the emulsion, and cause stains under the action of active sulfur. If oil is selected, filter equipment should be provided.
  • Malleable cast iron: A large number of fine, chemically active abrasive chips are produced during cutting. These active fines are like filter media, weakening the activity of the emulsion, and can produce iron soap, making the emulsion reddish brown, and the stability of the emulsion deteriorates. If you use oil, you must use a centrifuge or filter to remove iron filings
  • Lead and its alloys: easy to cut, can produce lead soap and destroy the stability of the emulsion. If the oil agent is used, it has a tendency to thicken the oil agent, and it is necessary to prevent the use of oil agents containing a large amount of fat.
  • Magnesium: Fine chips are generated during cutting and are combustible. Generally, water-based cutting fluid is not used, and low-viscosity oil can be used as cutting fluid.
  • Nickel and high-nickel alloys: High heat is locally generated during cutting, and the chips may sinter. Optional heavy-duty emulsion or non-reactive sulfurized oil.
  • Titanium: produces abrasive, flammable cutting, and is prone to work hardening. Use heavy-duty emulsified oil or extreme pressure oil.
  • Zinc: The cutting surface is irregular, it is difficult to obtain a good finish, and it will form zinc soap with the emulsion to separate the emulsion. Special emulsion should be selected.

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