JP4970775B2 - Tapping lubricant and tapping method - Google Patents

Description

The present invention relates to a tapping lubricating oil used for tapping an aluminum material and an aluminum tapping method using the tapping lubricating oil.
About.

  Conventionally, aluminum products having taps (screw holes) have been used, for example, as heat sinks for heat exchange of home appliances. An aluminum product having a tap can be produced by tapping an aluminum material made of aluminum or an aluminum alloy. Specifically, for example, a hole is formed in an aluminum material, and tapping is performed using a tapping jig for forming a screw hole in the hole. The tapping process is performed by supplying lubricating oil in order to improve the lubricity between the tapping jig and the aluminum material.

  In recent years, along with the reduction in size and weight of home appliances, the above-described aluminum products have also been reduced in size and the shape thereof has become complicated. Therefore, the tap diameter is also required to be reduced, and the lubricating oil used for forming the tap is required to have better lubricity. Actually, as the lubricating oil supplied at the time of tapping, the use of a high oiliness agent, a lubricating oil with an increased amount of the oiliness agent or a high viscosity lubricating oil has been used (see Patent Document 1).

  However, such a conventional lubricating oil has a problem of poor cleaning properties after tapping. That is, since the lubricating oil remains on the surface of the aluminum material after the tapping process, a process of washing the lubricating oil with an organic solvent or the like is generally performed in the next process. However, when a conventional lubricating oil having excellent lubricity is used, there is a problem that the amount of residual oil is increased, cleaning after tapping is difficult, cleaning time is prolonged, and cleaning efficiency is lowered. Furthermore, since the amount of residual oil increases, the amount of lubricating oil that dissolves in the cleaning liquid increases, and the replacement time of the organic cleaning liquid that is usually recycled is advanced, resulting in an increase in production cost. It was.

JP-A-2005-290187

  The present invention has been made in view of such conventional problems, and it is possible to suppress the adhesion of aluminum wear powder in tapping and to reduce the amount of residual oil after tapping. And a tapping method.

The first invention is for an aluminum material made of 3000 series, 5000 series, or 6000 series aluminum alloy or 1000 series aluminum, for an M5 × 0.5 or less metric fine screw as defined in JIS B0207, and an effective screw. A tapping lubricant used for tapping to form a screw hole with a depth of 10 mm or less,
The tapping lubricating oil comprises a base oil, 1 to 30 parts by weight of an oily agent with respect to 100 parts by weight of the base oil, and 1 to 10 parts by weight of an extreme pressure agent with respect to 100 parts by weight of the base oil. Containing
As said base oil, the initial boiling point measured by the method based on the fuel oil distillation test method prescribed | regulated by JISK2254 is 192-297 degreeC, an end point is 219-353 degreeC, kinematic viscosity is 1.5-11 cSt (at40 ° C) synthetic hydrocarbons and / or mineral oil hydrocarbons,
The synthetic hydrocarbon is at least one selected from α-olefins having 12 to 18 carbon atoms, isoparaffin, and polybutene,
The oily agent contains one or more selected from higher alcohols, synthetic esters, fatty acids, and fats and oils,
As the higher alcohol, those having 12 to 18 carbon atoms are used.
The synthetic ester is selected from fatty acid esters having 12 to 18 carbon atoms on the fatty acid side and 1 to 4 carbon atoms on the alcohol side and / or glycerin, trimethylolethane, trimethylolpropane, pentaerythritol, and sorbitan. Using a polyol ester composed of one or more polyhydric alcohols and a fatty acid having 10 to 22 carbon atoms,
The extreme pressure agent is a tapping lubricating oil containing a sulfur compound and / or a phosphorus compound (claim 1).

  The tapping lubricant of the first invention contains the base oil, the oily agent, and the extreme pressure agent in the specific ratio. In particular, the base oil contains synthetic hydrocarbons and / or mineral oil hydrocarbons having an initial boiling point of 192 to 297 ° C, an end point of 219 to 353 ° C, and a kinematic viscosity of 1.5 to 11 cSt (at 40 ° C). Yes. Therefore, the above tapping lubricant is an aluminum material made of 3000 series, 5000 series, or 6000 series aluminum alloy or 1000 series aluminum, and for an M5 × 0.5 or less metric fine screw, effective thread depth of 10 mm. It can use suitably for the tapping process which forms the following screw holes.

  That is, the tapping lubricant oil exhibits excellent lubricity in the tapping process and can suppress adhesion of aluminum wear powder. Therefore, it is possible to prevent aluminum wear powder from adhering to the aluminum material and the tool used for the tapping process to damage the tool, and to prevent burrs and chips from occurring in the thread of the screw hole. it can. Moreover, the said specific base oil is used for the said lubricating oil for a tapping process, and the outstanding lubricity can be exhibited with a comparatively small amount of the said oil agent and the said extreme pressure agent. Therefore, in the tapping lubricant, the amount of residual oil after the tapping process can be reduced. Therefore, the tapping lubricating oil can be easily removed by, for example, organic cleaning after the tapping.

  As described above, according to the first aspect of the present invention, it is possible to provide a tapping lubricating oil that can suppress the adhesion of aluminum wear powder in the tapping process and can reduce the amount of residual oil after the tapping process. it can.

The second invention is a method of tapping an aluminum material made of 3000 series, 5000 series, or 6000 series aluminum alloy or 1000 series aluminum,
The tapping process lubricating oil of the first invention is supplied to the part of the aluminum material where the tapping process is performed, and the aluminum material is used for a metric fine screw of M5 × 0.5 or less as defined in JIS B0207. A tapping process method for an aluminum material is characterized in that a screw hole having an effective screw depth of 10 mm or less is formed (claim 4 ).

In the tapping method of the second invention, the screw hole is formed in the aluminum material using the tapping lubricant for the first invention. Therefore, taking advantage of the excellent characteristics of the tapping lubricating oil, in the tapping method, it is possible to suppress the adhesion of aluminum wear powder and to form screw holes with desired dimensions and shapes. Moreover, wear of the tapping tool can be suppressed and the tool life can be extended.
Moreover, in the said tapping process method, the amount of residual oil after a tapping process can be reduced. Therefore, after the tapping process, the tapping process lubricant can be easily removed by, for example, organic cleaning.

Next, a preferred embodiment of the present invention will be described.
The tapping lubricant can be used for aluminum materials made of 3000 series, 5000 series, or 6000 series aluminum alloys or 1000 series aluminum. Specifically, for example, extruded shapes made of aluminum such as A1100 and A1200 defined in JIS H 4100, or extruded shapes made of aluminum alloys such as A3003, A3203, A5052, A5454, A5083, A6061, and A6063 Can be used. It can also be used for plates and strips defined in JIS H4000.

The tapping lubricating oil is used for tapping processing for forming a screw hole having an effective screw depth of 10 mm or less for a metric fine screw of M5 × 0.5 or less as defined in JIS B0207. When forming a screw hole for a metric fine screw exceeding M5 × 0.5, when using the above tapping lubricant, or when forming a screw hole exceeding an effective screw depth of 10 mm, the above tapping lubricant is used. When oil is used, lubrication is impaired due to an increase in the amount of heat generated by processing, and welding between the processing jig and the material may occur.
“Effective screw depth” is the length of the threaded portion that satisfies the diameter, effective diameter, and inner diameter of the valley of the metric fine thread “female screw” defined in JIS B0207.

The tapping lubricating oil contains the base oil, the oily agent, and the extreme pressure agent.
The base oil contains synthetic hydrocarbons and / or mineral oil hydrocarbons. Synthetic hydrocarbons and mineral oil-based hydrocarbons have an initial boiling point of 192 to 297 ° C., an end point of 219 to 353 ° C., and a kinematic viscosity of 1 measured by a method in accordance with the fuel oil distillation test method defined in JIS K2254. .5 to 11 cSt (at 40 ° C.)

  When the initial boiling point of the base oil is less than 192 ° C., the end point is less than 219 ° C., or the kinematic viscosity is less than 1.5 cSt, the lubricity of the lubricating oil for tapping may be lowered. . For this reason, when a screw hole is formed by the tapping process, there is a risk that burrs, chips or the like may occur in the thread. On the other hand, if the initial boiling point exceeds 297 ° C., the end point exceeds 353 ° C., or the kinematic viscosity exceeds 11 cSt, the amount of residual oil after tapping may increase, making it difficult to remove by washing. There is.

  Examples of the mineral oil-based hydrocarbon used in the base oil include paraffin-based mineral oil and naphthenic mineral oil. In addition, as the mineral oil-based hydrocarbon, a mineral oil containing an aroma component can also be used. In this case, it is preferable to use a mineral oil having an aroma component content of 2% by weight or less from the viewpoint of preventing environmental pollution.

Moreover, it is preferable that the said synthetic hydrocarbon as said base oil is 1 or more types chosen from a C12-C18 alpha olefin, isoparaffin, and polybutene .
Since the α-olefin has a double bond at the end of the molecule and is easily chemisorbed on the surface of the aluminum material, it has a function as an oily agent. When the number of carbon atoms of the α-olefin is less than 12, the odor of the tapping process lubricating oil becomes so strong that the working environment may be deteriorated. In this case, the lubricity is lowered and it may be difficult to form a screw hole having a desired shape. On the other hand, when the number of carbon atoms exceeds 18, it tends to harden in the winter season, cold districts, etc., which may make handling difficult. In this case, the amount of residual oil may increase.
Further, as the polybutene used as the base oil, unhydrogenated polybutene or polybutene in which at least a part of the double bond is hydrogenated can be used. Among polybutenes, polyisobutylene has a relatively high high-pressure viscosity, so that the amount of oil introduced between the tapping tool and the aluminum material tends to increase, which is advantageous for low-viscosity base oils.

Next, the tapping lubricant oil contains one or more selected from higher alcohols, synthetic esters, fatty acids, and fats and oils as the oily agent.
As the higher alcohol used in the oily agent, those having 12 to 18 carbon atoms are preferably used .
When the number of carbon atoms of the higher alcohol is less than 12, there is a risk that the odor will be stiff and the working environment will be deteriorated. In this case, the lubricity is lowered and it may be difficult to form a screw hole having a desired shape. On the other hand, if the total number of carbons exceeds 18, it tends to harden in the winter, and the handling may be difficult. In this case, the amount of residual oil may increase.

  Specific examples of the higher alcohol include lauryl alcohol (linear saturated monohydric alcohol having 12 carbon atoms), myristyl alcohol (linear saturated monohydric alcohol having 14 carbon atoms), palmitic alcohol (direct carbon having 16 carbon atoms). Chain saturated monohydric alcohol), oleyl alcohol (linear straight-chain monohydric alcohol having 18 carbon atoms having one double bond), stearyl alcohol (straight-chain saturated monohydric alcohol having 18 carbon atoms) and the like can be used. . These alcohols can be used alone, but two or more kinds can be mixed and used. From the viewpoint of boundary lubricity, environmental safety, ease of handling, cost, and the like, it is more preferable to use lauryl alcohol or oleyl alcohol as the higher alcohol.

Moreover, as the said fatty acid used as said oil-based agent, a higher fatty acid having a total carbon number of 10 to 22 can be used. When the total number of carbon atoms is less than 10, the boundary lubricity is poor, and when it exceeds 22, there is a problem that it tends to harden in the winter and is difficult to handle. More preferably, a fatty acid having 11 to 17 carbon atoms is preferred.
Specifically, for example, capric acid (carbon number 10), undecanoic acid (carbon number 11), lauric acid (carbon number 12), tridecanoic acid (carbon number 13), myristic acid (carbon number 14), pentadecanoic acid ( Linear saturated carboxylic acids such as carbon number 15), palmitic acid (carbon number 16), margaric acid (carbon number 17), stearic acid (carbon number 18), and behenic acid (carbon number 22), and palmitoleic acid (carbon (Equation 16), unsaturated fatty acids such as oleic acid (18 carbon atoms), linoleic acid (18 carbon atoms), linolenic acid (18 carbon atoms), ricinoleic acid (18 carbon atoms), and the like can be used. Among these, in view of lubricity, workability, long-term stability, and cost, lauric acid, myristic acid, palmitic acid, oleic acid, and the like are desirable as the fatty acid used in the oily agent.

Moreover, as said synthetic ester used for the said oil agent, the fatty acid side carbon number is 12-18, and the alcohol side carbon number is 1-4 fatty acid ester, and / or glycerol, a trimethylol ethane, a trimethylol propane. It is preferable to use a polyol ester composed of one or more polyhydric alcohols selected from benzene, pentaerythritol, and sorbitan, and a fatty acid having 10 to 22 carbon atoms .
In this case, the lubricity of the lubricating oil for tapping can be further improved, and the adhesion of aluminum powder can be further suppressed. Moreover, an odor can be suppressed and a working environment can be made better. Furthermore, drying property can be improved and the amount of residual oil after a tapping process can be reduced more. The fatty acid constituting the synthetic ester may be linear or branched.

The fatty acid ester having 12 to 18 carbon atoms on the fatty acid side and 1 to 4 carbon atoms on the alcohol side is represented by the general formula (1) R1-COO-R2 (where R1 is 11 to 17 carbon atoms). And R2 is a hydrocarbon group having 1 to 4 carbon atoms. The above-mentioned “carbon number on the fatty acid side” is equal to the carbon number on the “R1-C” portion in the general formula (1), and the carbon number on the alcohol side is equal to the carbon number on the “R2” portion.
When the number of carbon atoms in R1 is less than 11, that is, when the number of carbon atoms on the fatty acid side is less than 12, the effect of improving lubricity and the effect of suppressing the adhesion of aluminum wear powder may be reduced. Further, in this case, there is a risk that the odor will be stiff. On the other hand, when the number of carbon atoms in R1 exceeds 17, that is, when the number of carbon atoms on the fatty acid side exceeds 18, the drying property is deteriorated, and the melting point becomes higher and the material tends to solidify at room temperature. There is. On the other hand, when the carbon number of R2, that is, the number of carbon atoms on the alcohol side exceeds 4, the drying property is deteriorated, the melting point becomes higher, and the material tends to solidify at room temperature, which may make handling difficult.

  Specific examples of the fatty acid ester represented by the general formula (1) include, for example, methyl laurate, ethyl laurate, propyl laurate, butyl laurate, methyl myristate, ethyl myristate, propyl myristate, Butyl myristate, methyl palmitate, ethyl palmitate, propyl palmitate, butyl palmitate, methyl stearate, ethyl stearate, propyl stearate, butyl stearate, methyl oleate, ethyl oleate, propyl oleate, oleic acid There are butyl and the like.

  Examples of esters of one or more polyhydric alcohols selected from glycerin, trimethylolethane, trimethylolpropane, pentaerythritol, and sorbitan and fatty acids having 10 to 22 carbon atoms include neopentyl glycol ester and trimethylol. 1 type (s) or 2 or more types chosen from a propane ester, pentaerythrester, etc. can be used. The synthetic ester may be either a full ester or a partial ester. Further, in the polyol ester of the polyhydric alcohol and the fatty acid having 10 to 22 carbon atoms, when the fatty acid has less than 10 carbon atoms, the lubricity is lowered and it is difficult to form a screw hole having a desired shape. There is a risk of becoming. On the other hand, when the number of carbon atoms exceeds 22, the amount of residual oil may increase.

  Specific examples of the neopentyl glycol ester include neopentyl glycol capric acid monoester, neopentyl glycol capric acid diester, neopentyl glycol ester, neopentyl glycol linolenic acid monoester, neopentyl glycol linolenic acid diester, neo Pentyl glycol stearic acid monoester, neopentyl glycol stearic acid diester, neopentyl glycol oleic acid monoester, neopentyl glycol oleic acid diester neopentyl glycol ester, neopentyl glycol isostearic acid monoester, neopentyl glycol isostearic acid diester, neopentyl Glycol palm oil fatty acid monoester, neopentyl glycol palm oil Fatty acid diester, neopentyl glycol beef tallow fatty acid monoester, neopentyl glycol beef tallow fatty acid diester, neopentyl glycol palm oil fatty acid monoester, neopentyl glycol palm oil fatty acid diester neopentyl glycol ester, 2 mol neopentyl glycol and 1 mol dimer acid There are 2 moles of complex ester of oleic acid. Of these, oleic acid, isostearic acid, coconut oil fatty acid, and beef tallow fatty acid esters are particularly preferable.

  Examples of the trimethylolpropane ester include trimethylolpropane capric acid monoester, trimethylolpropane capric acid diester, trimethylolpropane capric acid triester, trimethylolpropane linolenic acid monoester, trimethylolpropane linolenic acid diester, Methylolpropane linolenic acid triester, trimethylolpropane stearic acid monoester, trimethylolpropane stearic acid diester, trimethylolpropane stearic acid triester, trimethylolpropane oleic acid monoester, trimethylolpropane oleic acid diester, trimethylolpropane oleic acid Triester, Trimethylolpropane isostearic acid monoester, Trimethyl Propane isostearic acid diester, trimethylolpropane isostearic acid triester, trimethylolpropane palm oil fatty acid monoester, trimethylolpropane palm oil fatty acid diester, trimethylolpropane palm oil fatty acid triester, trimethylolpropane beef tallow fatty acid monoester Esters, trimethylolpropane beef tallow fatty acid diester, trimethylolpropane beef tallow fatty acid triester, trimethylolpropane palm oil fatty acid monoester, trimethylolpropane palm oil fatty acid diester, trimethylolpropane palm oil fatty acid diester, trimethylolpropane 2 mol dimer There are complex esters of 1 mol of acid and 4 mol of oleic acid. Of these, oleic acid, isostearic acid, coconut oil fatty acid, and beef tallow fatty acid esters are particularly preferable.

  Examples of pentaerythritol include pentaerythritol capric acid monoester, pentaerythritol capric acid diester, pentaerythritol capric acid triester, pentaerythritol capric acid tetraester, pentaerythritol linolenic acid monoester, pentaerythritol linolenic acid diester, pentaerythritol. Linolenic acid triester, pentaerythritol linolenic acid tetraester, pentaerythritol stearic acid monoester, pentaerythritol stearic acid diester, pentaerythritol stearic acid triester, pentaerythritol stearic acid tetraester, pentaerythritol oleic acid monoester, pentaerythritol oleic acid Diester, pe Taerythritol oleic acid triester, pentaerythritol oleic acid tetraester, pentaerythritol isostearic acid monoester, pentaerythritol isostearic acid diester, pentaerythritol isostearic acid triester, pentaerythritol isostearic acid tetraester, pentaerythritol palm oil fatty acid monoester, Pentaerythritol Palm Oil Fatty Acid Diester, Pentaerythritol Palm Oil Fatty Acid Triester, Pentaerythritol Palm Oil Fatty Acid Tetraester, Pentaerythritol Beef Fatty Acid Monoester, Pentaerythritol Beef Fatty Acid Diester, Pentaerythritol Beef Fatty Acid Triester, Pentaerythritol Beef Fatty Acid Tetraester, pentaerythrito Palm oil fatty acid monoester, pentaerythritol palm oil fatty acid diester, pentaerythritol palm oil fatty acid triester, pentaerythritol palm oil fatty acid tetraester, 2 mol of trimethylolpropane, 1 mol of dimer acid, 6 mol of oleic acid, etc. . Of these, oleic acid, isostearic acid, coconut oil fatty acid, and beef tallow fatty acid esters are particularly preferable.

Moreover, as for the said synthetic ester, it is more preferable that the carbon number is 12-18.
When the number of carbon atoms is less than 12, the lubricity may be lowered. On the other hand, when the number of carbon atoms exceeds 18, the viscosity further increases in winter and the like, and in some cases, it may solidify, so that it may be necessary to warm and dissolve during mixing.

  Moreover, as said fats and oils used for the said oil agent, at least 1 sort (s) chosen from soybean oil, rapeseed oil, palm oil, coconut oil, lard, beef tallow, etc. can be used, for example. Among these, palm oil and palm oil are preferable from the viewpoint of operability.

In the tapping lubricating oil, the content of the oily agent is 1 to 30 parts by weight with respect to 100 parts by weight of the base oil.
When the content of the oily agent is less than 1 part by weight, the oily effect is poor, unevenness of the tapping part becomes uneven, aluminum adheres to the tapping tool, and a desired tap shape is hardly formed. There is a fear. On the other hand, if it exceeds 30 parts by weight, the residual oil increases, and there is a risk of placing a burden on the cleaning of the next process. In this case, there is a risk of increasing the cost.

The tapping lubricating oil contains an extreme pressure agent.
The extreme pressure agent contains a sulfur compound and / or a phosphorus compound.
As the sulfur compound, for example, sulfurized ester, sulfurized lard, sulfurized ester and the like can be used.
Examples of the phosphorus compound include phosphoric acid esters, phosphoric acid ester thio compounds, phosphonic acids having an alkyl group having 1 to 8 carbon atoms, an alkylallyl group, or an aryl group, alkylphosphonic acid esters, tritolyl phosphate ( One kind or two or more kinds of tricresyl phosphate) can be used.

In the tapping lubricant, the content of the extreme pressure agent is 1 to 10 parts by weight with respect to 100 parts by weight of the base oil.
If it is less than 1 part by weight, there is a possibility that seizure will occur during tapping. On the other hand, even if the content exceeds 10 parts by weight, the lubricity is hardly improved and the cost may be increased. In this case, the amount of residual oil may increase.

Next, the tapping oil is used for fatty acid amine, alkanolamine, aliphatic polyamine, aromatic amine, alicyclic amine, heterocyclic amine and their alkylene oxide adducts with respect to 100 parts by weight of the base oil. The amine derivative selected from 0.01 to 2.0 parts by weight can be contained (claim 2 ).
In this case, it is possible to further suppress adhesion of aluminum wear powder to a tool or the like used for tapping.

  As said amine derivative, 1 or more types chosen from an aliphatic amine, an aliphatic polyamine, an aromatic amine, an alicyclic amine, a heterocyclic amine, those alkylene oxide adducts, etc. can be used. The amine derivative may contain a hydroxyl group or an ether group. The alkylene oxide to be added can be obtained by addition polymerization of alkylene oxide such as ethylene oxide, propylene oxide, butylene oxide, α-olefin oxide, styrene oxide and the like. The polymerization form of the alkylene oxide to be added is not particularly limited, and may be homopolymerization of one type of alkylene oxide, random copolymerization of two or more types of alkylene oxide, block copolymerization, random / block copolymerization, or the like.

  Specific examples of the aliphatic amine include methylamine, ethylamine, butylamine, caprylamine, laurylamine, stearylamine, oleylamine, tallowamine dimethylamine, diethylamine, dioctylamine, butyloctylamine, distearylamine, dimethyl Octylamine, dimethyldecylamine, dimethyllaurylamine, dimethylmyristylamine, dimethylpalmitylamine, dimethylstearylamine, dimethylbehenylamine, dilaurylmonomethylamine, trioctylamine and the like can be used.

  Examples of the alkanolamine include monoethanolamine, diethanolamine, triethanolamine, N-methylethanolamine, N, N-dimethylethanolamine, N-ethylethanolamine, N, N-diethylethanolamine, N-isopropylethanolamine, N, N-diisopropylethanolamine, monoisopropanolamine, diisopropanolamine, triisopropanolamine, N-methylisopropanolamine, N, N-dimethylisopropanolamine, N-ethylisopropanolamine, N, N-diethylisopropanolamine, N- Isopropylisopropanolamine, N, N-diisopropylisopropanolamine, mono-n-propanolamine, di-n-propanolamine, n-propanolamine, N-methyl n-propanolamine, N, N-dimethyl n-propanolamine, N-ethyl n-propanolamine, N, N-diethyl n-propanolamine, N-isopropyl n-propanolamine, N , N-diisopropyl n-propanolamine, monobutanolamine, dibutanolamine, tributanolamine, N-methylbutanolamine, N, N-dimethylbutanolamine, N-ethylbutanolamine, N, N-diethylbutanolamine, N -Isopropylbutanolamine, N, N-diisopropylbutanolamine, etc. can be used.

Examples of the aliphatic polyamine include ethylene diamine, diethylene triamine, triethylene tetraamine, hexamethylene diamine, and cured beef tallow propylene diamine.
As the aromatic amine, for example, aniline, dimethylaniline, diethylaniline and the like can be used.
Examples of the alicyclic amine include N-cyclohexylamine, N, N-dicyclohexylamine, N, N-dimethyl-cyclohexylamine, N, N-diethyl-cyclohexylamine, N, N-di (3-methyl-cyclohexyl). ) Amine, N, N-di (2-methoxy-cyclohexyl) amine, N, N-di (4-bromo-cyclohexyl) amine and the like can be used.

  Examples of the heterocyclic amine include pyrrolidine, piperidine, 2-pipecholine, 3-pipecoline, 4-pipecoline, 2,4-pipecoline, 2,6-pipecoline, 3,5-lupetidine, piperazine, homopiperazine, and N-methyl. Piperazine, N-ethylpiperazine, N-propylpiperazine, N-methylhomopiperazine, N-acetylpiperazine, N-acetylhomopiperazine, 1- (chlorophenyl) piperazine, N-aminoethylpiperidine, N-aminopropylpiperidine, N- Aminoethylpiperazine, N-aminopropylpiperazine, N-aminoethylmorpholine, N-aminopropylmorpholine, N-aminopropyl-2-pipecoline, N-aminopropyl-4-pipecoline, 1,4-bis (aminopropyl) piperazine Etc. It is possible.

Moreover, as said amine derivative, it has a branched chain and a C4-C20 thing is preferable. In this case, the solubility in the base oil can be improved and an increase in the amount of residual oil after tapping can be suppressed.
In addition, when the alkylene oxide adduct of fatty acid amine, alkanol amine, aliphatic polyamine, aromatic amine, alicyclic amine, and heterocyclic amine is used as the amine derivative, the number of added moles of alkylene oxide is 1 to 6 is preferable.
When the number of moles of added ruxylene oxide exceeds 6, the dissolution in the base oil becomes worse. More preferably, the number of added moles of alkylene oxide is 1 to 4.

  In addition, when the amine derivative is added to the tapping lubricant, the content of the amine derivative is preferably 0.01 to 2.0 parts by weight with respect to 100 parts by weight of the base oil. . When the amount is less than 0.01 part by weight, the effect of suppressing the adhesion of the aluminum wear powder by adding the amine derivative may not be sufficiently obtained. On the other hand, when the amount exceeds 2.0 parts by weight, the effect of the oily agent or the extreme pressure agent is impaired, and as a result, the lubricity may be deteriorated.

In addition, the tapping lubricating oil is based on 100 parts by weight of the base oil, sodium dioctylsulfosuccinate, sodium di-2-ethylhexylsulfosuccinate, an alkylene oxide adduct of a polyhydric alcohol, and a hydrocarbyl ether thereof. It is preferable to contain 0.1 to 5.0 parts by weight of one or more oxygen-containing compounds selected from (Claim 3 ).
In this case, the effect of suppressing the adhesion of aluminum wear powder in the tapping lubricant can be further improved. When the content of the oxygen-containing organic compound is less than 0.1 parts by weight, the adhesion suppressing effect of the aluminum wear powder by the oxygen-containing organic compound may not be sufficiently obtained. On the other hand, if it exceeds 5.0 parts by weight, the other components of the lubricating oil for tapping may be adversely affected and the lubricity may be lowered, or the residual oil after tapping may be increased. As the oxygen-containing organic compound, those having one or more quaternary carbons in the molecule are more preferable.

  As the polyhydric alcohol alkylene oxide adduct used as the oxygen-containing organic compound and the polyhydric alcohol constituting the hydrocarbyl ether, an alcohol containing 2 to 6 hydroxyl groups can be used. Specific examples of such polyhydric alcohols include neopentyl glycol, trimethylol ethane, trimethylol propane, trimethylol butane, pentaerythritol, dipentaerythritol, 2-butyl-2-ethyl-1,3- There are propanediol, 2-methyl-2-propyl-1,3-propanediol, 2,2-diethyl-1,3-propanediol and the like.

  Moreover, as an alkylene oxide which comprises the alkylene oxide adduct of polyhydric alcohol and its hydrocarbyl ether, a C2-C6 alkylene oxide can be used. An alkylene oxide having 2 to 4 carbon atoms is preferable. Specific examples of such alkylene oxide include ethylene oxide, propylene oxide, 1,2-epoxybutane (α-butylene oxide), 2,3-epoxybutane (β-butylene oxide), 1,2- Examples include epoxy-1-methylpropane, 1,2-epoxyheptane, and 1,2-epoxyhexane. The polymerization form of alkylene oxide or the like is not particularly limited, and may be homopolymerization of one type of alkylene oxide or the like, random copolymerization of two or more types of alkylene oxide, block copolymerization, random / block copolymerization, or the like. . Moreover, when adding an alkylene oxide to the polyhydric alcohol which has 2-6 hydroxyl groups, you may add to all the hydroxyl groups, and you may add to only one part hydroxyl group.

  Moreover, as the hydrocarbyl ether of the alkylene oxide adduct of a polyhydric alcohol, one obtained by converting part or all of the terminal hydroxyl groups of the alkylene oxide adduct into a hydrocarbyl ether can be used. The hydrocarbyl group mentioned here represents a hydrocarbon group having 1 to 24 carbon atoms. Specific examples of the hydrocarbon group having 1 to 24 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, Linear or branched pentyl group, linear or branched hexyl group, linear or branched heptyl group, linear or branched octyl group, linear or branched nonyl group, linear or branched Decyl group, linear or branched undecyl group, linear or branched dodecyl group, linear or branched tridecyl group, linear or branched tetradecyl group, linear or branched pentadecyl group, straight Linear or branched hexadecyl group, linear or branched heptadecyl group, linear or branched octadecyl group, linear or branched nonadecyl group, linear or branched icosyl group, linear or branched Heiko An alkyl group having 1 to 24 carbon atoms such as a vinyl group, a linear or branched docosyl group, a linear or branched tricosyl group, a linear or branched tetracosyl group; a vinyl group, a linear or branched propenyl group , Linear or branched butenyl group, linear or branched pentenyl group, linear or branched hexenyl group, linear or branched heptenyl group, linear or branched octenyl group, linear or branched A branched nonenyl group, a linear or branched decenyl group, a linear or branched undecenyl group, a linear or branched dodecenyl group, a linear or branched tridecenyl group, a linear or branched tetradecenyl group, Linear or branched pentadecenyl group, linear or branched hexadecenyl group, linear or branched heptadecenyl group, linear or branched octadecenyl group, linear or branched nonadecenyl group 2 or more carbon atoms such as a linear or branched icosenyl group, a linear or branched heicosenyl group, a linear or branched dococenyl group, a linear or branched tricosenyl group, a linear or branched tetracocenyl group, etc. 24 alkenyl groups; C5-C7 cycloalkyl groups such as cyclopentyl, cyclohexyl and cycloheptyl; methylcyclopentyl, dimethylcyclopentyl (including all structural isomers), methylethylcyclopentyl (all Including structural isomers), diethylcyclopentyl group (including all structural isomers), methylcyclohexyl group, dimethylcyclohexyl group (including all structural isomers), methylethylcyclohexyl group (including all structural isomers) , Diethylcyclohexyl group (including all structural isomers), methylcycloheptyl 6 carbon atoms, such as thiol group, dimethylcycloheptyl group (including all structural isomers), methylethylcycloheptyl group (including all structural isomers), diethylcycloheptyl group (including all structural isomers), etc. Alkyl cycloalkyl group having ˜11; aryl group having 6 to 10 carbon atoms such as phenyl group, naphthyl group, etc .: tolyl group (including all structural isomers), xylyl group (including all structural isomers), ethylphenyl Groups (including all structural isomers), linear or branched propylphenyl groups (including all structural isomers), linear or branched butylphenyl groups (including all structural isomers), straight Chain or branched pentylphenyl group (including all structural isomers), straight chain or branched hexylphenyl group (including all structural isomers), straight chain or branched heptylphenyl group (all ), Linear or branched octylphenyl groups (including all structural isomers), linear or branched nonylphenyl groups (including all structural isomers), linear or branched Branched decylphenyl group (including all structural isomers), linear or branched undecylphenyl group (including all structural isomers), linear or branched dodecylphenyl group (all structural isomers) An alkylaryl group having 7 to 18 carbon atoms such as benzyl group, phenylethyl group, phenylpropyl group (including isomers of propyl group), phenylbutyl group (including isomers of butyl group), phenylpentyl And arylalkyl groups having 7 to 12 carbon atoms such as a group (including an isomer of a pentyl group) and a phenylhexyl group (including an isomer of a hexyl group).

The tapping lubricating oil may contain an antioxidant as necessary.
As the antioxidant, for example, a phenolic compound can be used. As the phenol compound, one having one or a plurality of phenol groups can be used as long as it has an antioxidant effect. Specifically, examples of the phenol compound include 2,6-ditertiarybutyl-P-cresol, n-octadecyl-3- (3 ′, 5′-di-t-butyl-4′-hydroxyphenyl). Propionate, tetrakis [methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] methane, tris (3,5-di-t-butyl-4-hydroxybenzyl) isocyanurate, 4, 4′-butylidenebis- (3-methyl-6-tert-butylphenol), triethylene glycol-bis [3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate], 3,9-bis { 2- [3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy] -1,1-dimethylethyl} -2,4 Examples include 8,10-tetraoxaspiro [5,5] undecane, benzenepropanoic acid, 3,5-bis (1,1-dimethyl-ethyl) -4-hydroxy-octyl ester. Further, as the antioxidant, in addition to the above phenolic compounds, aromatic amines such as phenyl-α-naphthylamine, partial esters of polyhydric alcohols such as sorbitan monooleate, phosphate esters and derivatives thereof may be used. it can.

  The tapping lubricant may contain a rust inhibitor, a corrosion inhibitor, an antifoaming agent, and the like as necessary. As the corrosion inhibitor, benzotriazole or the like can be used, and as the antifoaming agent, a silicon-based antifoaming agent or the like can be used.

Example 1
Next, examples of the present invention will be described.
This example is an example in which a tapping process lubricating oil is produced and an aluminum material is tapped using the tapping process lubricating oil.
The tapping lubricant in this example is for an aluminum material made of 3000 series, 5000 series, or 6000 series aluminum alloy or 1000 series aluminum, for metric fine screws of M5 × 0.5 or less as defined in JIS B0207. Thus, it is a lubricating oil for tapping used in tapping for forming a screw hole having an effective screw depth of 10 mm or less.

  The tapping processing lubricating oil of this example is a base oil, 1 to 30 parts by weight of an oily agent with respect to 100 parts by weight of the base oil, and an extreme pressure of 1 to 10 parts by weight with respect to 100 parts by weight of the base oil. Containing the agent. The base oil has an initial boiling point of 192 to 297 ° C., an end point of 219 to 353 ° C., and a kinematic viscosity of 1.5 to 11 cSt (at 40 ° C.) measured by a method based on the fuel oil distillation test method specified in JIS K2254. ) Synthetic hydrocarbons and / or mineral oil hydrocarbons. Moreover, as an oiliness agent, 1 or more types chosen from a higher alcohol, a synthetic ester, a fatty acid, and fats and oils are contained. Moreover, as an extreme pressure agent, a sulfur type compound and / or a phosphorus type compound are contained.

  In this example, as shown in Tables 1 to 4 below, 36 types of tapping lubricants (sample E1) having different amounts and types of base oil, oily agent, extreme pressure agent, amine derivative, and oxygen-containing compound are used. To sample E36). These tapping lubricants contain mineral oils or synthetic hydrocarbons having different initial viscosities, end points, and kinematic viscosities at a temperature of 40 ° C. as base oils. Specifically, naphthenic mineral oils having different initial boiling points, end points, and kinematic viscosities were used as the mineral oil. In measuring the kinematic viscosity, the kinematic viscosity at 40 ° C. is measured according to JIS K 2283 “Kinematic Viscosity Test Method for Crude Oil and Petroleum Products”, and the measuring instrument is JIS K 2839 “Petroleum Test”. Cannon-Fenske viscometer "Glassware for Glass" was used. Moreover, 1-dodecene, 1-hexadecene, or 1-octadecene was used as the synthetic hydrocarbon.

  As the oily agent, higher alcohol, fatty acid ester, polyol ester, fatty acid, or oil was used. Specifically, oleyl alcohol (carbon number 18), decyl alcohol (carbon number 10), lauryl alcohol (carbon number 12), or ecosanol (carbon number 20) was used as the higher alcohol. Examples of fatty acid esters include methyl decanoate (10 fatty acid side carbon atoms and 1 alcohol side carbon atom), butyl decanoate (fatty acid side carbon number 10 and alcohol side carbon number 4), and methyl laurate (fatty acid side carbon number 12). , Alcohol side carbon number 1), butyl laurate (fatty acid side carbon number 12, alcohol side carbon number 4), pentyl laurate (fatty acid side carbon number 12, alcohol side carbon number 5), methyl stearate (fatty acid side carbon number) 18, alcohol side carbon number 1), butyl stearate (fatty acid side carbon number 18, alcohol side carbon number 4), pentyl stearate (fatty acid side carbon number 18, alcohol side carbon number 5), eicoate methyl (fatty acid side carbon) Number 20 and alcohol side carbon number 1) or butyl eicoate (fatty acid side carbon number 20 and alcohol side carbon number 4) were used. In addition, as the polyol ester, trimethylolpropane capric acid triester (fatty acid side carbon number 8; paired polyhydric alcohol: trimethylolpropane), trimethylolpropanedecanoic acid triester (fatty acid side carbon number 10, pair) Polyhydric alcohol: trimethylolpropane), trimethylolpropane behenic acid triester (22 carbon atoms on the fatty acid, paired polyhydric alcohol: trimethylolpropane), trimethylolpropane behenic acid triester (24 carbon atoms on the fatty acid side) , Paired polyhydric alcohol: trimethylolpropane). Further, oleic acid was used as the fatty acid, and palm oil was used as the fat.

As the extreme pressure agent, sulfurized lard, which is a sulfur compound-based extreme pressure agent, or tolyl phosphate, which is a phosphate compound-based extreme pressure agent, was used.
As the amine derivative, N, N-dicyclohexylamine ethylene oxide 2-mol adduct was used, and as the oxygen-containing compound, 2-butyl-2-ethyl 1,3-propanediol ethylene oxide 2-mol adduct was used.
Tables 1 to 4 show the compositions of the tapping lubricating oils of Samples E1 to E36.

  Further, in this example, in order to clarify the excellent characteristics of the samples E1 to E36, 16 types of lubricating oils (sample C1 to sample C16) for comparison were prepared. Tables 5 and 6 show the compositions of the lubricating oils of Sample C1 to Sample C16.

  Next, using each sample shown in Tables 1 to 6 (Sample E1 to Sample E36 and Sample C1 to Sample C16), the aluminum material was tapped 10 times for each sample. At this time, the effective screw depth and the screw shape in each tapping process, the repeatability in the 10-time tapping process, and the water wetted area ratio after the tapping process were evaluated. In the evaluation, as the aluminum material, an aluminum extruded shape of A1100, A1200, or an aluminum alloy extruded shape of A3003, A3203, A5052, A5454, A5083, A6061, or A6063 as defined in JIS H4100 is used. 62 patterns of tests 1 to 62 were performed using the regions (see Tables 7 to 9).

“Effective screw depth and screw shape”
A drill hole (prepared hole) corresponding to the target screw diameter (M5 × 0.5 defined in JIS B0207) was applied to the aluminum material by a power press or the like to obtain an aluminum material for evaluation. Aluminum subjected to pilot hole processing was set in a tapping machine, and a thread was formed using a tap tool having a target size (M5 × 0.5 defined in JIS B0207). The same processing was repeated 10 times to form 10 threads on the aluminum material. After forming the thread, each processed part was cut with a saw or the like, and the thread forming state was observed. As a result, the case where 9 or more out of the 10 processed workpieces were missing at the top of the thread or had no burrs, and the result was shown as “◯” in Tables 7 to 9 described later. On the other hand, the case where there was no chipping or burr was 5 or more and less than 9 out of 10 processed pieces was indicated as “necessary improvement” and shown as “Δ” in Tables 7 to 9. Furthermore, the case where there were no chips or burrs was less than 5 out of 10 processed pieces was regarded as “failed” and shown as “x” in Tables 7 to 9.
Moreover, the effective screw depth was measured about the cutting part by the above-mentioned saw. As a result, the case where the effective thread depth was 4.5 mm or more was 9 or more out of 10 processed pieces was indicated as “pass”, and indicated as “◯” in Tables 7 to 9 described later. On the other hand, the case where the effective thread depth is 4.5 mm or more was 5 or more and less than 9 out of 10 processed pieces was indicated as “necessary improvement”, and indicated as “Δ” in Tables 7 to 9 described later. . Furthermore, the case where the effective thread depth was 4.5 mm or more was less than 5 or not at all in the number of processed 10 pieces, and it was indicated as “Fail”, and “X” was shown in Tables 7 to 9 described later.

"Repeatability"
A drill hole (prepared hole) corresponding to the target screw diameter (M5 × 0.5 defined in JIS B0207) was applied to the aluminum material by a power press or the like to obtain an aluminum material for evaluation. Aluminum subjected to pilot hole processing was set in a tapping machine, and tapping was continuously performed 10 times or more using a tap tool having a target size (M5 × 0.5 defined in JIS B0207).
In the process of tapping, the case where the aluminum wear powder does not adhere to the tip of the tap tool and the machining can be performed continuously 9 times or more is “pass”, and “○” is shown in Tables 7 to 9 below. ". On the other hand, when the number of machining operations is 5 times or more and less than 9 times, aluminum wear powder adheres to the tip of the tap tool to form an adhesive piece. And indicated as “Δ” in Tables 7 to 9 to be described later. In addition, when the number of machining operations is less than 5 times, aluminum wear powder adheres to the tip of the tap tool to form an adhesive piece. In Tables 7 to 9 of FIG.

"Water wet area ratio"
For measurement of the wetted area ratio, 0.5 g of each sample was dropped on each aluminum material (thickness arbitrary) having an area of 100 cm ² and uniformly applied. After application, the aluminum material was stored in a desiccator for 8 hours. Then, it was gently immersed for 5 seconds in a hydrocarbon-based organic solvent (hexane (C ₆ H ₁₄ ) was used in the experiment), then the aluminum material was pulled up and air-dried in a desiccator for 30 minutes.
After air drying, the aluminum material was gently immersed in pure water deionized with an ion exchange resin for 5 minutes. Thereafter, the aluminum material was pulled up, and the water wetted area rate was measured using a “water wetted area rate measuring plate” described later.

“Water-wetting area ratio measurement plate” is a measurement plate in which 11 lines perpendicular to each other are spaced at 1 cm length and width on a transparent plate such as acrylic, and 100 squares of 1 cm ² exist in an area of 100 cm ^2. It is. The water wetted area is more than half of one square, and the number of all wetted squares is counted, and the number obtained by dividing the number by 100 is expressed as “water wetted area”. Rate ". That is, the higher the “water-wetting area ratio”, the harder the sample remains on the aluminum material after processing, and it can be determined that the amount of residual oil after washing is low. The case where the “water-wetting area ratio” is 90% or more is “level 1”, 80% or more and less than 90% is “level 2”, and the case where it is less than 80% is “level 3”. To Table 9.

"Comprehensive evaluation"
Based on the results of “Effective Screw Depth”, “Screw Shape”, “Repeatability”, and “Water Wetting Area Ratio” evaluated as described above, a comprehensive determination was made. To Table 9.
In this comprehensive evaluation, the evaluation of “effective screw depth”, “screw shape”, and “repetitive workability” is all “◯”, and “water wetted area ratio” is “level 1”. "
In addition, when the evaluation of “effective thread depth” and “screw shape” is “◯”, the evaluation of “repetitive workability” is “△”, and the “water wetted area ratio” is “level 1”, “○ "
In addition, the evaluations of “effective screw depth”, “screw shape”, and “repetitive workability” were all “Δ”, and “water wetted area ratio” was “level 1”, and “Δ”. Furthermore, the evaluation of “effective screw depth” and “screw shape” is “◯”, the evaluation of “repetitive workability” is “△”, and the “water wetted area ratio” is “level 2”. “△”.
In addition, when the evaluations of “effective screw depth”, “screw shape”, and “repetitive workability” are all “x”, the evaluation was “x” regardless of the result of “water wetted area ratio”. Furthermore, even when the “water wetting area ratio” is “level 3”, “x” is used regardless of the results of “effective screw depth”, “screw shape”, and “repetitive workability”.
In the comprehensive evaluation, the samples of “◎”, “○”, “△”, although there are differences in the degree, suppresses the adhesion of aluminum wear powder during tapping and reduces the amount of residual oil after tapping. It is a lubricating oil for tapping.

As is known from Tables 7 and 8, in Tests 1 to 36 using Samples E1 to E36, screw holes could be formed with almost no defects such as burrs and chips, and the amount of residual oil was small.
Therefore, 1 to 30 weights of oily agents such as higher alcohols with respect to 100 parts by weight of base oil having an initial boiling point of 192 to 297 ° C, an end point of 219 to 353 ° C, and a kinematic viscosity of 1.5 to 11 cSt (at 40 ° C) And tapping lubricants (samples E1 to E36) containing 1 part by weight and 1 to 10 parts by weight of an extreme pressure agent composed of a sulfur-based compound and / or a phosphorus-based compound prevent adhesion of aluminum wear powder in the tapping process. It can be seen that a desired screw hole can be formed by suppressing the amount of residual oil after tapping.

  On the other hand, in the sample C1 using the base oil whose initial boiling point, end point, and kinematic viscosity are below the above ranges, the lubricity is insufficient, and the predetermined result cannot be obtained with the effective screw depth and screw shape. (See Test 45 in Table 9). Further, even in the sample C11 using the base oil whose initial boiling point is lower than the above range, the lubricity is insufficient, and a predetermined result cannot be obtained with the effective screw depth and the screw shape (see Test 55 in Table 9). ). On the other hand, in the sample C2 using the base oil whose initial boiling point, end point, and kinematic viscosity exceeded the above ranges, the water wetted area ratio was low and the residual oil amount was large (see Test 46 in Table 9). . Moreover, also in the sample C12 using the base oil whose end point exceeds the above range, the water wetted area ratio was low and the amount of residual oil was large.

In addition, Sample C3, Sample C13, and Sample C14 in which the amount of the oil-based agent added was less than 1 part by weight was insufficient in lubricity, and a predetermined performance was not obtained in terms of screw workability (Test 47 in Table 9). , Test 59, and Test 60). On the other hand, the residual oil amount increased in Sample C4, Sample C15, and Sample C16 to which more than 30 parts by weight of the oil-based agent was added (see Test 48, Test 61, and Test 62 in Table 9).
Further, Sample C5 and Sample C6 in which the amount of the extreme pressure agent added was less than 1 part by weight, the lubricity was insufficient, and a predetermined result was not obtained in terms of effective screw workability (Test 49 and Table 9). Test 50). On the other hand, in Sample C7 and Sample C8 to which an extreme pressure agent exceeding 10 parts by weight was added, the predetermined performance was obtained in terms of screw workability, but the amount of residual oil increased (Test 51 and Table 9). (See Test 52).

Next, Test 4 to Test 7 in Table 7 are evaluations performed using Sample E4 to Sample E7 in which the carbon number of the higher alcohol as the oiliness agent is different.
As is known from Table 7, samples E5 and E6 using higher alcohols having 12 to 18 carbon atoms have effective screw depths and screw shapes as compared to sample E4 using higher alcohols having less than 12 carbon atoms. The evaluation results were improved (see Test 4 to Test 7 in Table 7). Furthermore, it can be seen that Sample E5 and Sample E6 have an improved water wettability compared to Sample E7 using a higher alcohol having more than 18 carbon atoms, and can reduce the amount of residual oil (Test 4 in Table 7). To test 7). Therefore, preferably, the higher alcohol used as the oily agent has 12 to 18 carbon atoms.

  Test 8 to Test 17 in Table 7 are evaluations performed using Sample E8 to Sample E17 in which the types (fatty acid side carbon number and alcohol side carbon number) of the fatty acid ester as the oily agent are different. As known from Table 7, sample E10, sample E11, sample E13, and sample E14 using fatty acid esters having 12 to 18 carbon atoms on the fatty acid side and 1 to 4 carbon atoms on the alcohol side are carbon atoms on the fatty acid side. The evaluation results of the effective screw depth and the screw shape were improved as compared with the sample E8 and the sample E9 whose number is less than 12 (see Test 8 to Test 17 in Table 7). Further, Sample E10, Sample E11, Sample E13, and Sample E14 used Sample E16 and Sample E17 using fatty acid ester having 18 or more carbon atoms on the fatty acid side, and Fatty acid ester having 4 or more carbon atoms on the alcohol side. Compared with the sample E12 and the sample E15, it can be seen that the water wettability is improved and the residual oil amount can be further reduced (see Test 8 to Test 17 in Table 7). Therefore, it is preferable that the fatty acid ester used as the oil-based agent has 12 to 18 carbon atoms on the fatty acid side and 1 to 4 carbon atoms on the alcohol side.

  Moreover, Test 18 to Test 21 in Table 7 are evaluations performed using Sample E18 to Sample E21 in which the type of polyol ester (the number of carbon atoms on the fatty acid side) as the oiliness agent is different. As is known from Table 7, sample E19 and sample E20 using a polyol ester composed of a polyhydric alcohol and a fatty acid having 10 to 22 carbon atoms are sample E18 using a polyol ester having a carbon number of less than 10 on the fatty acid side. In comparison, the evaluation results of the effective screw depth and screw shape were improved (see Test 18 to Test 20 in Table 7). Sample E19 and sample E20 have an improved water wettability compared to sample E21 using a polyol ester having more than 22 carbon atoms on the fatty acid side, and it can be seen that the amount of residual oil can be reduced (Table 7). Test 19 to Test 21). Therefore, preferably, in the polyol ester used as the oily agent, the number of carbon atoms on the fatty acid side is 10 to 22.

Test 30 to Test 33 in Table 8 are evaluations performed using Sample E30 to Sample E33 to which an amine derivative or an oxygen-containing compound is added. As is known from Table 8, it can be seen that when an amine derivative or an oxygen-containing compound is added, the repeatability can be further improved (see Test 30 to Test 33 in Table 8).
In Test 53 of Table 9, the result of Sample C9 added with an excess of amine derivative exceeding 2.0 parts by weight is shown, and in Test 54 of Table 9, 5.0 parts by weight of oxygen-containing organic compound is shown. The result of sample C10 added in excess in excess of is shown. According to the results of Test 53 and Test 54, it can be seen that when an excessive amount of amine derivative or oxygen-containing organic compound is added, the effective screw depth, screw shape, and repeatability are deteriorated. Therefore, when an amine derivative and an oxygen-containing organic compound are added, the amine derivative content is preferably 2.0 parts by weight or less, and the oxygen-containing organic compound content is preferably 5.0 parts by weight or less. .

Moreover, as is known from the results of Test 1 to Test 44 in Tables 7 and 8, Sample E1 to Sample E36 are applied to aluminum materials made of 3000 series, 5000 series, or 6000 series aluminum alloys or 1000 series aluminum. By doing so, the above-described excellent lubricity and reduction in the amount of residual oil can be shown.
On the other hand, in the test 57 and the test 58 in Table 9, aluminum composed of 2024S and 7075S defined in the test JIS H 4100 using the tapping lubricant for the sample E2 similar to the test 2 and the test 37 to the test 44 is used. The material was tapped. As a result, the effective thread depth was insufficient, chips and burrs were observed in the thread, and the repeatability was also lowered. This is because the aluminum material consisting of 2024S, which is a 2000 series aluminum alloy, and 7075S, which is a 7000 series aluminum alloy, has high material strength and a large calorific value, so the kinematic viscosity of the base oil of the tapping lubricant is high. It is thought that this is because the oily effect is lowered and the lubricity is insufficient as a result.

  As described above, 1 to 30 parts by weight of an oil-based agent such as a higher alcohol with respect to 100 parts by weight of a base oil having an initial boiling point of 192 to 297 ° C., an end point of 219 to 353 ° C., and a kinematic viscosity of 1.5 to 11 cSt. And tapping lubricants (samples E1 to E36) containing 1 to 10 parts by weight of an extreme pressure agent composed of a sulfur compound and / or a phosphorus compound are 3000 series, 5000 series, or 6000 series aluminum With respect to an aluminum material made of an alloy or 1000 series aluminum, adhesion of aluminum wear powder in tapping processing can be suppressed to form a desired screw hole, and the amount of residual oil after tapping processing can be reduced.

Claims (4)

Screws with an effective thread depth of 10 mm or less, for metric fine screws of M5 x 0.5 or less as defined in JIS B0207, to aluminum materials made of 3000 series, 5000 series, or 6000 series aluminum alloys or 1000 series aluminum A tapping lubricant used for tapping to form a hole,
The tapping lubricating oil comprises a base oil, 1 to 30 parts by weight of an oily agent with respect to 100 parts by weight of the base oil, and 1 to 10 parts by weight of an extreme pressure agent with respect to 100 parts by weight of the base oil. Containing
As said base oil, the initial boiling point measured by the method based on the fuel oil distillation test method prescribed | regulated by JISK2254 is 192-297 degreeC, an end point is 219-353 degreeC, kinematic viscosity is 1.5-11 cSt (at40 ° C) synthetic hydrocarbons and / or mineral oil hydrocarbons,
The synthetic hydrocarbon is at least one selected from α-olefins having 12 to 18 carbon atoms, isoparaffin, and polybutene,
The oily agent contains one or more selected from higher alcohols, synthetic esters, fatty acids, and fats and oils,
As the higher alcohol, those having 12 to 18 carbon atoms are used.
The synthetic ester is selected from fatty acid esters having 12 to 18 carbon atoms on the fatty acid side and 1 to 4 carbon atoms on the alcohol side and / or glycerin, trimethylolethane, trimethylolpropane, pentaerythritol, and sorbitan. Using a polyol ester composed of one or more polyhydric alcohols and a fatty acid having 10 to 22 carbon atoms,
A tapping process lubricating oil characterized by containing a sulfur compound and / or a phosphorus compound as the extreme pressure agent. 2. The tapping lubricant according to claim 1, wherein 100 parts by weight of the base oil contains a fatty acid amine, an alkanolamine, an aliphatic polyamine, an aromatic amine, an alicyclic amine, a heterocyclic amine, and alkylene oxides thereof. A tapping process lubricating oil comprising 0.01 to 2.0 parts by weight of an amine derivative selected from adducts. In Claim 1 or 2, the lubricating oil for tapping processing is based on 100 parts by weight of the base oil, sodium dioctyl sulfosuccinate, sodium di-2-ethylhexyl sulfosuccinate, an alkylene oxide adduct of a polyhydric alcohol, And a lubricating oil for tapping, which contains 0.1 to 5.0 parts by weight of one or more oxygen-containing compounds selected from the hydrocarbyl ethers thereof. In a method of tapping an aluminum material made of 3000 series, 5000 series, or 6000 series aluminum alloy or 1000 series aluminum,
The lubricating oil for a tapping process as described in any one of Claims 1-3 is supplied to the site | part which performs the said tapping process of the said aluminum material, M5 * 0.5 prescribed | regulated to JIS B0207 to the said aluminum material. A tapping process method for an aluminum material, wherein a screw hole having an effective screw depth of 10 mm or less for the following metric fine screw is formed.