There are two kinds of cutting fluids used in CNC machining: one is oil-based cutting fluid, the other is water-based cutting fluid;
There are four kinds of cutting fluids used in CNC machining: cutting oil, emulsion, semi synthetic fluid and synthetic fluid,
Cutting oil, emulsion (sometimes called soapy water in some places) and synthetic fluid (called environmental protection fluid by many people) are commonly used, but they may know less about semi synthetic night;
How do you choose cutting fluid in the machining process? Let’s look at the advantages and disadvantages of each cutting fluid
- Cutting oil for CNC machining:
advantage:
a. Very high physical lubrication
b. Suitable for low speed, less cutting allowance
c. Provides a very good surface finish
Disadvantages:
a. Poor heat transfer
b. Fire hazard
c. High cost of use
d. Smoke / fog
- The emulsion used in CNC processing:
advantage:
Better lubrication
a. For polymetallic safety
b. It has better cooling than cutting oil
c. Good erosion ability of scrap iron
d. Lower cost than cutting oil
e. Good rust prevention
f. Easy sewage treatment
Disadvantages:
a. Increased dosage
b. It also emulsifies dirty oil
c. Poor odor control
d. Dirty equipment
e. Poor hydraulic stability
f. Poor filtration
g. Poor mixing
- Semi synthetic liquid used in CNC processing:
advantage;
a. Better cooling than emulsion
b. Good rust protection
c. Cleaner than emulsion
d. Good filtration
e. It is more suitable for hard water and dirty oil
f. It is more suitable for hard water and dirty oil
g. It has better antibacterial property than emulsion
Disadvantages:
a. There is a tendency to blister in soft water
b. Oil repellency is worse than synthetic liquid
c. When used in high concentration, may have skin allergy tendency
- Synthetic solution for CNC processing:
advantage:
a. Very good cleanliness
b. It doesn’t stink
c. High acceptance of operators
d. Low consumption turnover (12-20 weeks)
e. Very good cooling performance
f. Completely oil repellent
g. Hypovacuole
h. Long service life
i. Very good filtration / fast settling performance
Disadvantages:
a. Low physical lubrication
b. Difficulty in sewage treatment
c. Sticky residue, especially in hard water
d. Compatibility with emulsions
e. It reacts with some polycarbonate
f. May damage the paint of the machine tool
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