1. purpose and scope
1.1 purpose
In order to correctly use and manage cutting fluid and improve the use value of cutting fluid, this specification is specially specified.
1.2 range
Management of cutting fluid used in workshop.
2. responsibilities
The factory equipment Engineering Department of oil management personnel responsible for the management of the use of the cutting fluid, and fill in the "daily inspection and maintenance of cutting fluid records"; and is responsible for the use of cutting fluid (deterioration) determination.
3. terms
Abbreviations / terms
Definition
cutting fluid
The cutting fluid is used for a mixed lubrication and cooling processing tools and machining parts in the metal cutting process, often also called metalworking fluid (oil). In addition, in production practice, according to the use of different occasions, cutting fluid has different habits of call. For example: grinding cutting fluid used in machining and application in grinding; honing oil used in honing; used in hobbing and shaping processing of cooling oil etc..
Oil base cutting fluid
Also known as cutting oil, the use does not need dilution, the direct use of dope.
Water based cutting fluid
Refers to the dilution of liquid water and then use the cutting fluid, water in diluted liquid usually accounted for more than 90% of the proportion.
Dope and working fluid
In order to distinguish the name of water soluble cutting fluid before and after dilution, the water base cutting fluid is usually called diluted liquid before dilution, and is called working fluid after dilution.
Use and management of 4. cutting fluid
4.1 classification of cutting fluids
4.1.1 cutting fluid types: oil base, water base (emulsion, microemulsion, synthetic liquid)
According to the composition of 4.1.1.1, oil based cutting fluid can be classified into 4 categories:
A) pure mineral oil
B) antifriction cutting oils
C) non active extreme pressure cutting oil
D) extreme pressure cutting oil
According to the properties of diluent, 4.1.1.2 can be classified into 3 types:
(A) emulsion B) microemulsion (Ban Hecheng) C) synthetic solution
Application of 4.2 cutting fluid
4.2.1 correct cleaning, disinfection and preparation of new liquid
4.2.1.1 drain the original solution: completely drain the original working fluid as much as possible.
4.2.1.2 slag: complete removal of working fluid system and has the working fluid tank, the surface of machine, pump and a circulating pipeline system and filtration system to remove the object including chip, sludge, mixed oil, sludge and other impurities, leaving No.
4.2.1.3 cleaning and sterilization: using 1~2% cutting fluid and 0.1~0.3% bactericide to prepare cleaning liquid, the circulation cleaning system at least not less than 1 hours, can be extended to 4 hours.
4.2.1.4 evacuation, check the cleaning effect.
4.2.1.5 prepared the new solution: first, measurement of body size (length * width * height), to determine the ratio of concentration according to requirements; inject new water tank, open loop system, according to the proportion of slow addition of cutting fluid (Quantitative) solution to the mix (do not add the cutting fluid after injected water dilution); concentration monitoring using the refractometer and refraction coefficient correction to achieve the reading, using the specified concentration.
Matters needing attention in preparation:
Should：
- any time as far as possible to mix with the prepared liquid mixing device.
The concentrated liquid must be injected into the water in the manual mixture.
If you want to increase the concentration of the working fluid, the liquid storage tank is directly mixed concentrate for good.
The processing liquid is mixed thoroughly before measuring the concentration.
Use of the refractometer, or concentration of processing liquid chemical titration test.
Must not：
In the tank into the concentrated liquid, and injected into the concentrated solution.
The injection of concentrated liquid to 5 gallon barrels or prestowage tank, and water to concentrate.
The concentrated liquid in the processing liquid in a liquid storage tank into the unknown.
The general perception method with visual or to control the concentration of.
The use of temperature lower than 50 DEG F (10 DEG C) water (this is because many emulsion at low temperatures are not stable).
The concentrated liquid poured into the machine in the work area, and then open the nozzle of concentrate was mixed.
4.2.1.6 cutting fluid concentration = refractometer readings * refractive index
Concentration of cutting fluid: the mass fraction of dope contained in the working fluid. For example, 100kg working fluid contains liquid 5kg, and the concentration of working fluid is 5%
4.2.1.7 entry processing
Daily maintenance of 4.2.2 cutting fluid
The 4.2.2.1 supply cutting fluid should be pre specified in other containers and then injected into the cutting fluid tank. It is important to avoid only supplying water for the change of concentration, so it must be avoided.
The dilution of 4.2.2.2 cutting fluid is related to the stability of emulsion. Before the cutting fluid is used, the dilution ratio and the volume of the required emulsion should be determined first. Then calculate the amount of cutting fluid and the amount of water. Clean the container, pour all the water into the container, and then add the cutting fluid solution under the low speed agitation. When the emulsion is formulated, the adding speed of the raw liquid is the same as that of the non emulsified liquid. The procedure of adding liquid and water to the cutting fluid can not be reversed.
4.2.2.3 professional personnel on the cutting fluid management and maintenance, daily testing, testing items include:
Concentration (refractive index), pH value (8.5~9.2), appearance (discoloration, demulsification), odor, oil slick, foam and so on.
4.2.2.4 keep the cutting fluid clean, no matter to the system throwing debris, washing things and flowing into the dirty water (laundry, washing hands, etc.).
4.2.2.5 according to the daily inspection situation, earnestly fill in "cutting fluid daily inspection and maintenance records".
Monitoring content of 4.2.2.6 water soluble cutting fluid
Appearance
Stable and uniform
No less than two times a week
PH value
Greater than 8.2
concentration
by rule
The oil slick
Less than 2%
foam
Less than 2 ml /10 min.
Rust preventive cast iron
Single chip 24 hours qualified
