JPH02269798A - Water-soluble metal working oil - Google Patents

Abstract

PURPOSE:To obtain the title oil which hardly decays and can be utilized for cutting and grinding and in various metal working fields, by using an oligomer of an a-olefin having the number of carbon atoms in a specified range and/or a hydrogenated derivative thereof as constituent. CONSTITUTION:A 6-14C alpha-olefin oligomer (e.g. 1-decene oligomer) and/or a hydrogenated derivative thereof is mixed, if necessary, with an anionic emulsifier (e.g. diethanolamine salt of oleic acid) and, in addition, a nonionic emulsifier (e.g. polyoxyethylene nonylphenyl ether).

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a water-soluble metal working fluid that can be used in a wide range of fields, particularly for cutting and grinding. processing or
The present invention relates to a water-soluble metalworking fluid that can be suitably used in various metalworking fields such as drawing, drawing, and rolling.

[Conventional technology]

BACKGROUND ART Conventionally, in metal processing such as cutting and grinding, different types of oils have been used, such as emulsion or soluble type oils for cutting processes and solution type oils for grinding processes. The reasons for distinguishing between oils are as follows.

■Emulsion and soluble type oils both contain mineral oil, and if they are used in grinding, they will clog the grinding wheel.On the other hand, if solution-type oils are used in cutting, This results in decreased surface finish accuracy and tool life in tapping and reaming.

In other words, conventionally, metalworking fluids for cutting and grinding have had problems such as the need to distinguish between the two for cutting and grinding, as described above, and the scope of application is narrow. It has been desired to develop a metalworking fluid that can be used for grinding. In addition, regarding various conventional metal working fluids, for example, when the above-mentioned conventional metal working fluid for cutting is used for cutting, when the conventional metal working fluid for grinding is used for grinding, etc. However, it is difficult to say that the processability is sufficient, and there are problems such as the finished surface accuracy of processed products is still insufficient, the tool life is likely to be shortened, and there is a need for improved corrosion resistance. In addition to the above-mentioned problems, especially in the grinding process, it is difficult to maintain a sufficiently long dressing interval.

[Problem to be solved by the invention]

The present invention has been made in view of the above circumstances.

It is an object of the present invention to solve the above-mentioned problems, to extend tool life and improve finished surface accuracy when used for cutting, etc. Since it does not cause clogging, it is possible to extend the dressing interval, and therefore it has excellent advantages such as being suitable for use as a cutting and grinding oil.It is also resistant to spoilage and improves the anti-corrosion effect of the coolant. It is an object of the present invention to provide a water-soluble metal working fluid which is extremely advantageous in practice and can be suitably used in various metal working fields.

[Means to solve the problem]

As a result of intensive research to solve the above-mentioned problems, the present inventors found that a specific synthetic oil, that is, α within a specific carbon number range.
- By blending olefin oligomers and/or their hydrogenated products in place of conventional mineral oils and synthetic oils, or in appropriate combinations thereof, an excellent water-soluble metalworking fluid that satisfies the above objectives can be obtained. The present invention was completed based on this finding.

That is, the present invention consists of a water-soluble metal working fluid characterized by blending an oligomer of an α-olefin having 6 to 14 carbon atoms and/or a hydrogenated product thereof.

The water-soluble metal working fluid of the present invention contains at least the above-mentioned α-olefin oligomer having 6 to 14 carbon atoms and/or its hydrogenated product [component (A)]. In addition to component (A), various additive components and diluents may be added as necessary. When preparing the water-soluble metal working fluid of the present invention, there are no particular restrictions on the order and method of blending each component. For convenience, the composition using components other than the solvent) will be referred to as a stock solution, and the composition of the water-soluble metalworking fluid of the present invention will be described in detail.

When the water-soluble metalworking fluid of the present invention is used at least for cutting and grinding, water is usually used as a diluent, and the undiluted solution is diluted with an appropriate amount of water. In order to use the water-soluble metal working fluid of the present invention diluted in water as described above, it is usually desirable to add a suitable emulsifier in addition to the component (A). This emulsifier is
Although various emulsifiers can be appropriately selected from known emulsifiers, it is usually preferable to use an anionic emulsifier [component (B)], and in particular, an anionic emulsifier [component (B)]. Nonionic emulsifier [(C)
component] is preferably used in combination.

In the present invention, the oligomer of α-olefin having 6 to 14 carbon atoms may be a homopolymer (oligomer) of α-olefin selected from α-olefins having 6 to 14 carbon atoms, or a mixture of two or more α-olefins. Mention may be made of copolymers or mixtures or compositions thereof.

Note that these oligomers may contain oligomer components having an olefin other than the α-olefin as a monomer unit in a concave circle that does not impede the purpose of the present invention.

Examples of the α-olefin having 6 to 14 carbon atoms include aliphatic α-olefins, alicyclic α-olefins, aromatic α-olefins, and the like.

As the oligomer of the α-olefin having 6 to 14 carbon atoms, an oligomer of an aliphatic α-olefin or an oligomer obtained by polymerizing an aliphatic α-olefin as a main component is particularly preferably used. Ru.

Examples of the aliphatic α-olefin include linear ones and branched ones.

Specifically, for example, linear ones include l-hexene, nyheptene, 1-octene, 1-nonene, 1-decene, 1-undecene, l-dodecene, 1-tridecene, and 1-tetradecene. I can do it. In addition, examples of the branched type include various types of iso-type and neo-type having a vinyl group or vinylidene group.

The hydrogenated additive of α-olefin oligomers having 6 to 14 carbon atoms is a compound or a mixture thereof obtained by hydrogenating the various oligomers or mixtures thereof.

As component (A) of the present invention, oligomers of α-olefins having 8 to IO carbon atoms such as 1-octene, ■-nonene, 1-decene, ■-undecene, and ■dodecene or hydrogenated products thereof are particularly preferably used. be done.

In the present invention, as the component (A), one of the various oligomers or hydrogenated products thereof may be used alone, or two or more thereof may be used in combination.

In the present invention, the oligomer, its hydrogenated additive, or a mixture thereof used as the component (A) contains 10
Those having a kinematic viscosity at 0°C generally within the range of 1 to 50 cSt can be suitably used. If this kinematic viscosity is less than 1 cSt, tool life in cutting may be reduced, while if it exceeds 50 cSt, emulsification may become difficult.

The ratio of the component (A) used in the water-soluble metalworking fluid of the present invention is 10% of the above-defined stock solution containing component (A) (i.e., the total of each component excluding diluents such as water).
When closed at 0% by weight, it is usually within the range of 5 to 95% by weight, preferably 10 to 60% by weight.

If this proportion is less than 5% by weight, the effects of the present invention may not be fully achieved. Further, mineral oil or synthetic oil may be blended as other base oil in an amount of 1/2 or less of the total base oil.

In the present invention, various kinds of anionic emulsifiers can be used as the anionic emulsifier used as the component (B). For example, salts of carboxylic acids or sulfonic acids with amines or metals (oleic acid Examples of amines include fatty acids having 8 to 30 carbon atoms, polyhydric carboxylic acids such as succinic acid and maleic acid, and amines such as mono-, di-,
Examples include alkanolamines such as triethanolamine, cyclic amines such as morpholine and piperazine, cyclohexylamine and dicyclohexylamine, or alkylene oxide adducts of these amines, and metals include alkali metals such as sodium and potassium, calcium, Examples include alkaline earth metals such as barium. )
, sulfate ester salts, phosphate ester salts, polymerized polymer emulsifiers made by partially saponifying olefins such as styrene and maleic anhydride copolymers, and polycondensed trapezoidal polymer emulsifiers such as naphthalene sulfonate-formalin condensates. One of these may be used alone or two or more may be used in appropriate combination. Particularly preferred are salts of fatty acids having 8 to 30 carbon atoms such as oleic acid and alkali metals such as sodium and potassium or alkanolamines such as mono-, di-, and triethanolamine, and salts of sulfonic acids and sodium, potassium, etc. Examples include one or more compounds selected from salts with alkali metals.

The proportion of the anionic emulsifier used as the component (B) in the aqueous metalworking fluid of the present invention is determined by the undiluted solution as defined above (i.e., diluted with water, etc.) containing the component (B), the component (A), etc. Usually 5% by weight or more, preferably 25% by weight when the total of each component (excluding the agent) is 100% by weight.
The content is preferably within the range of 80% by weight.

If this proportion is less than 5% by weight, emulsion stability may become poor.

In the present invention, various types of nonionic emulsifiers can be used as the component (C), including polyoxyalkylene glycol or its monomer, diether compound, glycerin or its alkylene oxide adduct, or Polyoxyalkylene emulsifiers such as those ether compounds (the alkylene is an alkylene group having 2 to 4 carbon atoms such as ethylene or propylene; the terminal ether substituent is an alkyl group, an aryl group, an alkylaryl group, an aralkyl group, cycloalkyl group, etc.); ester of carboxylic acid and alcohol (carboxylic acids include fatty acids having 8 to 30 carbon atoms such as oleic acid, polycarboxylic acids such as succinic acid and maleic acid, etc.); Examples of the alcohol include aliphatic alcohols having 6 to 30 carbon atoms, phenol, alkylphenol, polyhydric alcohols such as polyokine alkylene glycol, glycerin, sorbitan, pentaerythritol, trimethylolpropane, and alkylene oxide adducts thereof. and nitrogen-containing emulsifiers such as amides of alkanolamines and fatty acids or polycarboxylic acids, and alkylene oxide adducts of alkylamines, or may be used alone or in an appropriate combination of two or more. I can do it.

The ratio of the nonionic emulsifier used as the (C) component in the water-soluble metalworking fluid of the present invention is the stock solution as defined above containing the (C) component, the (B) component, the (A) component, etc. (That is, the total of each component excluding diluents such as water) is usually 50% by weight or less, preferably within the range of 2 to 30% by weight, when 100% by weight.

By using this nonionic emulsifier in combination with the component (B), the emulsion stability of the water-soluble metal working fluid of the present invention can be further improved.

The water-soluble metalworking fluid of the present invention includes the above component (A),
In addition to component (B) and component (C), if desired, component (B) and (C) used in conventional metalworking fluids may be added.
) Additives such as emulsifiers, rust/corrosion inhibitors, bactericides, extreme pressure agents, oily agents, and antifoaming agents may be added as appropriate.

The water-soluble metalworking fluid of the present invention is used by diluting the stock solution of the various compositions described above with a diluent, usually water. The dilution rate of the stock solution with water during this use is usually within 2000 times, preferably within the range of about 5 to 400 times, in terms of weight ratio.

If this dilution rate exceeds 2000 times or is too small, the effects of the present invention may not be fully exhibited when the water-soluble metal working fluid is used for cutting or grinding.

In addition, both the above-mentioned stock solution and those obtained by diluting the above-mentioned stock solution at various dilution rates with a diluent such as water (diluted solution),
It belongs to the water-soluble metal working fluid of the present invention.

In addition, when preparing the water-soluble metal working fluid of the present invention in either the undiluted liquid form or its diluted liquid form, each predetermined component (in the case of a diluted liquid, each component including a diluent such as water) is added. There are no particular restrictions on the order and method of blending or adding, and the components can be blended or added in various orders and methods.

The water-soluble metal working fluid of the present invention can be produced in the manner described above.

The water-soluble metal working fluid of the present invention can be used in various metal working processes such as cutting and grinding, polishing, drawing, drawing, rolling, etc. by diluting it with a diluent such as water as appropriate depending on the purpose of use. It can be suitably used in various fields. In particular, the water-soluble metal working fluid of the present invention can be suitably used for cutting and grinding as a diluent having a composition obtained by diluting the undiluted solution with water within the range of the dilution rate mentioned above, and is resistant to spoilage. It has excellent properties such as being hard to resist and can improve the effect of preventing coolant from rotting. It can extend tool life and improve surface finish accuracy in cutting, etc., and can also be used for grinding, etc. However, since the grinding wheel does not become clogged, it is possible to extend the dressing interval, and therefore it has excellent advantages such as being suitable for use as a cutting and grinding oil.

〔Example〕

Next, the present invention will be explained in more detail with reference to the following Examples and Comparative Examples, but the present invention is not limited thereto.

Examples 1 to 4 and Comparative Examples 1 to 4 Metalworking fluids having the compositions shown in Table 1 were prepared, and grinding tests were conducted using these metalworking fluids (Examples 1 and 2 and Comparative Examples 1 and 4). ) and cutting tests were conducted to evaluate the workability. We also conducted corrosion resistance tests for each metalworking fluid.

The properties of each component used in the preparation of the metalworking fluid, the properties of the cutting agent used in the machining test, the machining test conditions, the processability evaluation method, the rot resistance test conditions and evaluation method, etc. are described below. It is shown in the notes to Table 1.

The results are shown in Table 1.

From Table 1, for example, (a) a metalworking fluid made of the metalworking fluid of the present invention to which an α-olefin oligomer is added has improved workability compared to a conventional mineral oil-based metalworking fluid (implemented). (See Comparison of Example 2 and Comparative Example 1).

(b) The metalworking fluid made of the metalworking fluid of the present invention exhibits good grinding performance when compared with the metalworking fluid made of the conventional Solucidin type fluid (Example 2 and Comparative Example) (See comparison with 4).

Note 1: All components are expressed in weight percent as a processing oil stock solution.

Note 2' - L-decene oligomer with viscosity No.

"C) 6cSt Note 3' Oleic acid-diethanolamine salt 4)
Polyoxyethylene nonylphenyl ether Note 52 Sorbitan-oleic acid ester Note b 1
50 Neutral Note 7) Chlorinated paraffin Note 8) Other additive machinability including rust and corrosion inhibitors 9
(1) Cutting: Milling experiment (machining oil
It was diluted 0 times and subjected to experiments under the following [conditions]. ) Milling stainless steel and cast sand inch materials, measuring the number of pieces machined until the tool breaks and the surface accuracy (Rm
ax) was evaluated.

〔conditions〕

・Machine tool: Milling machine (Hitachi Seiki) ・Cutter m: Milling cutter (φ100) Sumitomo Electric (DHG4100R) ・Tip: T 25 A Igetalloy 5PCN42TR ・Work material: 80'Xl 50X90' (mm)
(SUS3103E sandwiched with FC-25) - Experimental conditions: Cutting speed V = 14.0 m/mtn
Feed f = 0.12 mm/rev Depth of cut t = 0.4 mm (2) Grinding: Centerless machining experiment (The machining oil was diluted 20 times with water and subjected to the experiment under the following [conditions].) Evaluation was made based on the number of pins processed up to dressing when stainless steel pins were centerless polished. Clogging of the grindstone was visually observed.

〔conditions〕

・Machine tool; centerless polishing machine ・Whetstone: GC (φ500) ・Work material: 5US316 Rotation speed: 2600m/min Note...) Tribute p i and its i' It was carried out and evaluated using the shaking culture method under the following conditions.

・Liquid it: 100 ml (dilute 2 d of stock solution with distilled water
0 times dilution) ・Temperature = 30°C ・Rotation speed: 160 rJ)m ・Septic bacteria: 5ml of the following preserved seed bacteria! ・Cuts: FC-253g ・Culture period: 2 weeks [Effects of the invention] According to the present invention When used for cutting, etc., it can extend the tool life and improve the finished surface accuracy.Furthermore, even when used for grinding, etc., it does not clog the grinding wheel, so the dressing interval can be extended. Therefore, it has excellent advantages such as being suitable for use as a dual-purpose oil for cutting and grinding. It is possible to provide a water-soluble metalworking fluid that has excellent performance and can be suitably used in various metalworking fields and is extremely advantageous in practice.

Claims (1)

[Scope of Claims] 1. A water-soluble metalworking fluid characterized by containing an oligomer of α-olefin having 6 to 14 carbon atoms and/or a hydrogenated product thereof. 2. A water-soluble metal working fluid containing (A) an oligomer of an α-olefin having 6 to 14 carbon atoms and/or a hydrogenated product thereof, and (B) an anionic emulsifier. 3. Water-soluble metal processing characterized by blending (A) an oligomer of α-olefin having 6 to 14 carbon atoms and/or its hydrogenated product, (B) an anionic emulsifier, and (C) a nonionic emulsifier. Oil agent.