JP2001049279A - Water insoluble cutting/grinding oil composition and metallic material processing method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide chlorinated compound-free, water insoluble cutting/grinding oil compositions which can realize excellent cutting or grinding performance which is equal to that of a chlorinated cutting/grinding oil even in a small amount used and, in addition, enable mist-spraying with effectively suppressed scattering in the cutting or grinding processing of metallic materials, above all, hard-to-cut materials such as stainless steel. SOLUTION: Water insoluble cutting/grinding oil compositions comprise, in addition to a base oil, 0.5-15 wt.% methacrylate polymer composed of a homopolymer of a methacrylic ester represented by the formula: CH2=C(CH3) COOR (wherein R is an 8-18C alkyl group) or a copolymer of such a monomer with another copolymerizable halogen element-free monomer, 5-25 wt.% sulfur based extreme-pressure additive, and 2-15 wt.% calcium sulfonate or zinc sulfonate based compound and have a kinematic viscosity at 40 deg.C of 50-100 mm2/sec.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-insoluble cutting / grinding oil composition and a method of processing a metal material using the same, and more particularly, to cutting or grinding a metal material, especially a difficult-to-cut material such as stainless steel. Insoluble cutting / grinding oil composition suitably used in the above, and cutting / grinding of metal materials can be performed economically and advantageously using such a water-insoluble cutting / grinding oil composition. It is about how you can do it.

[0002]

2. Description of the Related Art Conventionally, in the field of cutting and grinding of metal materials, usually, when such cutting and grinding processes are carried out, they are supplied to a processing portion of the metal material to provide lubrication performance, cooling ability, non-performance. Cutting oils or grinding oils (hereinafter abbreviated as cutting / grinding oils) that exhibit functions such as welding ability have been used. As such cutting and grinding oils, generally, a predetermined extreme pressure additive, for example, a chlorine-based extreme oil such as chlorinated paraffin, is added to a base oil such as a mineral oil, an animal or vegetable oil, or a synthetic oil such as an ester oil. Pressure additives, sulfur-based extreme pressure additives such as sulfurized fats and oils, sulfides, thiocarbonates and the like, and phosphorus-based extreme pressure additives such as phosphate esters and the like are widely used.

By the way, conventionally, when cutting or grinding a difficult-to-cut material such as stainless steel, especially austenitic stainless steel such as SUS304, the cutting performance or the cutting cost corresponding to the tool cost is required. In order to obtain grinding performance, it is practically indispensable to use a cutting / grinding oil containing a chlorine-based extreme pressure additive that is relatively inexpensive and has excellent cutting / grinding performance. However, such cutting and grinding fluids have various problems.

[0004] That is, such a chlorine-based cutting and grinding oil is to be disposed of by incineration after use, but when such waste oil containing chlorine is treated, It is not desirable from the viewpoint of environmental protection because harmful substances such as dioxin may be generated.In addition, chlorine-based compounds constituting the chlorine-based extreme pressure additive make processing materials and There is an inherent problem that corrosion of tools and the like is easily caused. Furthermore, as a method of supplying the cutting / grinding oil at the time of the processing operation, while the undiluted solution is dripped in the liquid to the processing portion of the material,
In addition to the method of circulating and using oils by performing predetermined processing operations, in recent years, in order to advantageously reduce the amount of cutting and grinding oils used and the amount of waste oils disposed of, the cutting of processed materials -A method (spraying method) of spraying a grinding oil in the form of a mist and not circulating it has come to be adopted. However, such a spraying method is a typical chlorine-based extreme pressure additive. In the case of carrying out a predetermined machining operation while supplying an oil agent containing chlorinated paraffin to the material to be processed, in order to achieve effective cutting and grinding performance, in the United States, some of them are carcinogenic substances. It is necessary to use highly harmful chlorinated paraffins at a high concentration, such as being certified as, and spraying oils causes mist containing such chlorinated paraffins to scatter around and diffuse into the air From where the the working environment is deteriorated significantly, also the problem of not sufficiently secure against the operator, with each other to inherent.

On the other hand, recently, from the viewpoints of environmental protection, corrosion resistance and safety, cutting and grinding oils containing no chlorine-based extreme pressure additives, so-called non-chlorine-based cutting and grinding oils, have attracted attention. For example, in Japanese Patent Application Laid-Open No. 9-296195, as a cutting / grinding oil composition, a phosphorus-based extreme pressure agent having a specific structure and an organic compound such as zinc dihydrocarbyldithiophosphate are used. Proposals have been made that each contain a predetermined amount of an overbased oil-soluble salt such as a metal compound and / or an overbased calcium sulfonate. JP-A-3-47898 discloses that a base oil is mixed with a base number improver such as a high base number alkaline earth metal sulfonate and an extreme pressure improver such as a sulfur type extreme pressure agent. A rust-preventive and metalworking oil composition has been proposed, and in Japanese Patent No. 2619285, zinc dithiophosphate, an alkali metal or alkaline earth metal borate, and rust inhibitor are added to a base oil. A cutting oil composition that can be used as a working oil for machine tools by blending agents in a predetermined ratio has been disclosed.

However, any of these non-chlorine cutting / grinding oil compositions can provide certain effects in cutting / grinding of general metal materials,
For difficult-to-cut materials such as austenitic stainless steel such as SUS304, it is difficult to say that the cutting / grinding performance is sufficient. The fact is that non-chlorine cutting and grinding oils effective for cutting materials have not yet been put to practical use.

[0007]

Here, the present invention has been made in view of such circumstances, and a problem to be solved is to cut or grind difficult-to-cut materials such as metal materials, particularly stainless steel. In the case of a small amount of use,
A water-insoluble cutting / grinding fluid that does not contain chlorine-based compounds and that can achieve excellent cutting or grinding performance comparable to chlorine-based cutting / grinding fluids, and also enables mist-like spraying while effectively suppressing scattering. It is to provide a composition.

Further, the present invention provides a metal material which can be effectively and cost-effectively cut and ground by using such a water-insoluble cutting and grinding oil composition. It is also an object of the present invention to provide a processing method of the present invention.

[0009]

Under these circumstances, the present inventors have conducted intensive studies in order to solve the above-mentioned problems, and as a result, a specific methacrylate-based polymer and a sulfur-based extreme pressure additive for a predetermined base oil. , And a calcium sulfonate or zinc sulfonate compound in a predetermined ratio,
The composition, whose kinematic viscosity is adjusted appropriately, is capable of spraying in the form of a mist, effectively suppressing the scattering of minute mist, and cutting hard-to-cut materials such as stainless steel. -It has been found that even in grinding, a small amount of use can advantageously achieve excellent cutting and grinding performance comparable to chlorine-based cutting and grinding fluids.

The present invention has been completed (attained) based on such findings, and its gist is that the general formula: CH ₂ ＣC (CH ₃ ) COOR (where R Is an alkyl group having 8 to 18 carbon atoms.) A homopolymer of a methacrylic acid ester monomer represented by the formula (I) or a copolymer with another halogen-free monomer copolymerizable with such a monomer. 0.5 to 15% by weight of a methacrylate-based polymer consisting of
-25% by weight and 2-15% by weight of a calcium sulfonate or zinc sulfonate-based compound, the balance consisting of a base oil, and having a kinematic viscosity of 50-100 mm ^{2 at} a temperature of 40 ° C. / Sec, a water-insoluble cutting and grinding oil composition.

That is, in the water-insoluble cutting / grinding oil composition according to the present invention, the specific three kinds of components, namely, the specific methacrylate polymer, Where the sulfur-based extreme pressure additive, calcium sulfonate or zinc sulfonate-based compound are each combined in a predetermined ratio and blended, and the kinematic viscosity thereof is adjusted within the above range, There is a great feature, in the water-insoluble cutting and grinding oil composition of such a configuration,
Even with a small amount of use, the synergistic effect of the combination of the above-mentioned specific three components can be applied to not only general metal materials that are relatively easy to process but also difficult-to-cut materials such as stainless steel. It can exhibit an effective cutting / grinding performance equal to or higher than that of the cutting / grinding fluid, and it can be sprayed advantageously in the form of a mist. From the kinematic viscosity where scattering can be effectively suppressed,
If it is used for cutting and grinding of metal materials using the spraying method, it becomes possible to cut or grind the target metal material economically and highly while maintaining a good working environment. is there.

The water-insoluble cutting / grinding oil composition of the present invention does not contain any chlorine-based compound, so it is environmentally friendly and can be applied to metal materials and tools. The effect is small, and furthermore, combined with the fact that spraying with reduced scattering as described above is possible,
The effect that the safety for the worker can be secured at a very high level can also be achieved.

In the water-insoluble cutting and grinding oil composition according to the present invention as described above, the methacrylate polymer is advantageously combined with the methacrylate monomer in the general formula: CH ₂ ＣC (CH ₃ ) COO-AN
A dialkylaminoalkyl methacrylate monomer represented by (R ′) ₂ (where A is an alkylene group having 2 to 6 carbon atoms, and R ′ is a methyl group, an ethyl group or a propyl group) Is preferred.

In another preferred embodiment of the water-insoluble cutting and grinding oil composition according to the present invention, the sulfur-based extreme pressure additive is a dialkyl polysulfide having an alkyl group having 8 to 18 carbon atoms, Alternatively, it is preferable that the calcium sulfonate or zinc sulfonate compound is a calcium salt or a zinc salt of alkylbenzenesulfonic acid.

In the present invention, the above-mentioned water-insoluble cutting / grinding oil composition is sprayed onto a metal material in the form of a mist, and the metal material is cut / ground. The present invention also provides a method of processing a metal material characterized by performing the following.

According to such a method of the present invention,
Since the water-insoluble cutting / grinding oil composition of the present invention is used, the amount of such composition used and the amount of disposal are effectively reduced, and while reducing the processing cost, metal materials, particularly This makes it possible to cut or grind difficult-to-cut materials such as stainless steel very well.

The method for processing a metal material according to the present invention is suitably applied to the cutting and grinding of stainless steel as described above, in particular, when cutting stainless steel with a circular saw. As a result, cutting of relatively hard-to-cut stainless steel can be advantageously performed.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The water-insoluble cutting and grinding oil composition according to the present invention is generally used for various known metal materials by means of a processing apparatus provided with a predetermined cutting or grinding tool. This is used when performing the cutting or grinding process, and is supplied to a processed portion of a metal material to exhibit desired cutting / grinding performance. In the supply of the water-insoluble cutting and grinding oil composition according to the present invention,
There is no problem if the grinding oil composition is applied to the metal material by dripping it to the processing site. More preferably, the cutting / grinding oil composition is applied to the metal material using an appropriate spraying device. Is sprayed in the form of a mist,
It is desirable to carry out using a spraying method, which makes it possible to effectively and advantageously reduce the amount of waste used and the amount of waste disposed after use, thereby greatly reducing the processing cost. is there.

More specifically, the water-insoluble cutting and grinding oil composition of the present invention used as described above, together with a predetermined base oil, as a specific three kinds of components, a specific methacrylate polymer and , A sulfur-based extreme-pressure additive and a calcium sulfonate or zinc sulfonate-based compound in a predetermined ratio, respectively, and having a kinematic viscosity of 50 to 10 at a temperature of 40 ° C.
It is composed of an object adjusted to 0 mm ² / sec.
It is insoluble in aqueous solvents. However, when the kinematic viscosity of the cutting / grinding oil composition is less than 50 mm ² / sec, it becomes impossible to perform effective cutting / grinding on the metal material, or such cutting / grinding cannot be performed.
When the grinding oil composition is sprayed on the metal material, the mist is largely scattered not only on the metal material but also around the metal material, thereby deteriorating the working environment.
On the other hand, if the kinematic viscosity exceeds 100 mm ² / sec, it becomes difficult to form a good mist when the liquid supply operation is performed according to the spraying method, thereby making it extremely difficult to perform the spraying operation. When removing the cutting / grinding oil composition adhering to the product, etc., laborious work is required, or especially when the work material is to be thinly cut, the cut surfaces of the processed product are not joined together. But,
The attached oil film of the cutting / grinding oil composition strongly adheres to each other and causes problems such as difficulty in separating. The kinematic viscosity of the cutting / grinding oil composition is as follows:
It can be determined based on the viscosities measured using various known viscometers.

In such a water-insoluble cutting / grinding oil composition, the base oil used as the base component is selected from various mineral oils conventionally known as cutting / grinding oil base oils. More preferably, it is composed of an economically inexpensive mineral oil such as oil or ester-based synthetic oil. Specifically, such mineral oils include kerosene, light oil, machine oil, spindle oil, turbine oil, cylinder oil, paraffin oil and the like. Further, as the ester-based synthetic oil, various known esters of fatty acids and alcohols can be advantageously used. Further, as the fatty acids used for obtaining such esters, lauric acid, palmitin and the like can be used. Examples of the alcohols include monohydric aliphatic alcohols having 1 to 18 carbon atoms, divalent glycols such as ethylene glycol, and pentaerythritol. And the like.
In the present invention, it is of course possible to use, as the base oil, the above-mentioned ones alone or a mixture of two or more kinds selected from them.

Incidentally, the base oil composed of such a mineral oil or an ester synthetic oil preferably has a kinematic viscosity at a temperature of 40 ° C. of about 1 to 100 mm ² / sec. In a water-insoluble cutting and grinding oil composition containing such a base oil, a desired kinematic viscosity can be advantageously achieved. In addition, the content of the base oil in the cutting / grinding oil composition is such that the specific three components are:
It is set appropriately so as to have a predetermined ratio described later.

On the other hand, in the present invention, one of the above-mentioned specific three components, which is added to such a base oil, is used.
One methacrylate-based polymer has the general formula: CH ₂ ＣC (CH ₃ ) COOR (where R is an alkyl group having 8 to 18 carbon atoms)
By copolymerizing a homopolymer of a methacrylic acid ester monomer represented by or such a methacrylic acid ester monomer with another monomer not containing a halogen element copolymerizable therewith. It is composed of the copolymer obtained and is used here mainly for adjusting the kinematic viscosity of the water-insoluble cutting and grinding oil composition. In the above general formula, the number of carbon atoms of the alkyl group represented by R is set to an integer in the range of 8 to 18 when the number of carbon atoms is smaller than 8 because the compatibility with the base oil is low. This is because there is a problem that the image quality becomes worse, and a value larger than 18 is not very practical.

The homopolymer of the methacrylic acid ester monomer used as such a methacrylate polymer includes aliphatic saturated alcohols having 8 to 18 carbon atoms, such as octyl alcohol, nonyl alcohol, decyl alcohol, and the like. Those obtained by using a monomer which is an ester of methacrylic acid with tridecyl alcohol, cetyl alcohol, stearyl alcohol, or the like, and polymerizing one or more of them can be advantageously used.

Further, in the above-mentioned copolymer as a methacrylate-based polymer, when obtaining the same, the other monomer which is used together with the methacrylic acid ester monomer as described above, which is a copolymer component, includes the methacrylic acid. As long as it is copolymerizable with the acid ester monomer and does not contain a halogen element, there is no problem. For example, alcohols having a small number of carbon atoms, such as methyl methacrylate, ethyl methacrylate, and butyl methacrylate, and methacrylic acid are used. And more preferably a monomer consisting of an ester of the general formula: CH ₂ ＣC (CH ₃ ) COO-AN (R ′) ₂ (where A is 2 to 6) A dialkylaminoalkyl methacrylate represented by the formula (I): an alkylene group having carbon atoms, and R 'is a methyl group, an ethyl group or a propyl group. It is collected by monomer, is a desirable, thereby introduces an amino group in the copolymer is the detergent-dispersant properties can be improved. Incidentally, examples of such a dialkylaminoalkyl methacrylate monomer include nitrogen-containing monomers such as dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, and diethylaminopropyl methacrylate. In addition, when the amount of such a copolymer component (monomer) used in producing the copolymer is generally,
It is 50% by weight or less, and preferably 30% by weight or less, based on the total amount thereof and the methacrylate monomer.

In the water-insoluble cutting / grinding oil composition of the present invention, the methacrylate-based polymer is used in an amount of 0.5 to 15% by weight, more preferably 1 to 10% by weight. In the above, it will be contained. However, if the content is too small, a sufficient effect cannot be obtained.Conversely, if the content is too large, the cutting / grinding performance is reduced, or the kinematic viscosity of the composition is reduced. This is because if the temperature is too high, various problems such as the difficulty in supplying the liquid by spraying may occur as described above.

The sulfur-based extreme pressure additive, which is another one of the above-mentioned specific three components, which constitutes the water-insoluble cutting and grinding oil composition according to the present invention, has been conventionally used as an extreme pressure agent. Various known compounds can be advantageously used, and specific examples thereof include sulfurized fatty acids, sulfurized fatty acid esters, and dialkyl polysulfides. In the present invention, the number of carbon atoms of the alkyl group is 8 ~
A dialkyl polysulfide of 18 will be preferably used.

Further, in the present invention, as described above,
A calcium sulfonate-based compound or a zinc sulfonate-based compound is added to the base oil together with the methacrylate-based polymer and the sulfur-based extreme pressure additive. Examples of the sulfonate-based compound include petroleum sulfonate and alkylbenzene sulfone. acid,
Alkanesulfonic acid calcium salt or zinc salt, etc.,
It is preferably used, and more preferably, calcium salt or zinc salt of alkylbenzenesulfonic acid is advantageously used among them. It should be noted that such a calcium sulfonate-based compound or zinc sulfonate-based compound does not cause any problem even if it contains fine particles such as calcium hydroxide or calcium carbonate, or zinc hydroxide or zinc carbonate.

In the water-insoluble cutting and grinding oil composition according to the present invention, the sulfur-based extreme pressure additive and the calcium sulfonate or zinc sulfonate-based compound are 5 to 25% by weight and 2 to 15% by weight, respectively. It will be included in the amount of weight%. This is because if the content of these components is too small or too large, the effective cutting or grinding performance cannot be sufficiently exhibited.

The water-insoluble cutting / grinding oil composition as described above includes, in addition to the above-mentioned ones, other than those described above, as long as the content of each component and the kinematic viscosity as a whole are adjusted within the above-mentioned ranges. Various additives, such as a rust preventive, an antioxidant, and a colorant, which do not contain a halogen element, can be compounded alone or in combination, and such additives include phosphoric acid of higher alcohols. Examples thereof include esters and dialkyldithiophosphates.

Thus, in the water-insoluble cutting and grinding oil composition according to the present invention having such a constitution, its kinematic viscosity enables spraying in the form of a mist, and such a spraying operation. Even if it is carried out, to the extent that scattering of mist can be effectively suppressed, while being appropriately adjusted, as a synergistic effect of the combined use of the specific three components as described above, in the cutting and grinding with a small amount of use Not only metal materials that are relatively easy to process but also hard-to-cut stainless steels, especially austenitic stainless steels such as SUS304, are comparable to chlorine-based cutting and grinding oils. Alternatively, it has a feature that more effective cutting / grinding performance can be realized. Specifically, the high lubricating effect can advantageously suppress damage to the machined surface due to rubbing between the machined surface and the work chips, and effectively prevent adhesion between the tool and the work chips and the work material. To prevent the damage of the tool caused by such adhesion, in other words, it is possible to extend the life of the tool, and further, it is also possible to achieve a suitable cooling effect, etc.
It demonstrates excellent functions.

Therefore, if the water-insoluble cutting / grinding oil composition as described above is used for cutting / grinding of a metal material by using a spraying method, the target metal can be maintained while maintaining a very favorable working environment. It is possible to cut or grind the material at high cost and at a high cost, and such an effective effect is a cutting work of stainless steel by a circular saw cutting machine among cutting and grinding processes. , It will be maximized.

Furthermore, in the water-insoluble cutting / grinding oil composition of the present invention, since no chlorine-based compound is added to the composition, the environmental effects due to the disposal of the compound, corrosion, etc. The effect on metal materials, tools, etc. is extremely small, and it is relatively safe for the human body.
Moreover, in addition to the above, since spraying with reduced scattering as described above is possible, it is possible to effectively prevent mist from being taken into the body through respiration when performing spraying work. The ability to ensure a very high degree of safety for the elderly,
You can play.

[0033]

EXAMPLES Hereinafter, some examples of the present invention will be described to clarify the present invention more specifically. However, the present invention imposes some restrictions by the description of such examples. It goes without saying that you don't receive anything. In addition, the present invention, in addition to the following examples, in addition to the above specific description, various modifications based on the knowledge of those skilled in the art, unless departing from the spirit of the present invention,
It should be understood that modifications, improvements and the like can be made.

First, cutting oil compositions (Examples 1 to 3 of the present invention and Comparative Examples 1 to 5) having various compositions shown in Tables 1 and 2 below were prepared. Further, the viscosity of each of the thus prepared cutting fluid compositions was measured according to a conventional method, and the kinematic viscosity at a temperature of 40 ° C. was determined. The results are shown in Table 1 below.
Also shown in Table 2.

In preparing each cutting oil composition,
Mineral oil (machine oil) was used as the base oil. Further, as the methacrylate-based polymer, using stearyl methacrylate and cetyl methacrylate,
After homogenously mixing so that the weight ratio is 65:35, homopolymer (A) obtained by radical polymerization in the mineral oil, or stearyl methacrylate, cetyl methacrylate and diethylaminoethyl methacrylate is used. And they
After uniformly mixing so that the weight ratio was 65: 30: 5, the copolymer (B) obtained by radical polymerization in the mineral oil was used.
Further, as the sulfur-based extreme pressure additive, dilauryl pentasulfide containing 40% by weight of sulfur element was used.

Furthermore, in this embodiment, the calcium sulfonate compound is provided as a mixture of petroleum sulfonate calcium salt at a ratio of 45% by weight and a mineral oil, and the zinc sulfonate compound is added. And a mixed solution of zinc salt of dodecylbenzenesulfonic acid and mineral oil (content ratio of zinc salt of dodecylbenzenesulfonic acid: 30% by weight). The mineral oil constituting such a mixed liquid is the same as that used as the base oil, but in Tables 1 and 2 below, the compounding composition of the sulfonate-based compound, Shown in the mixing ratio of the mixture in the cutting oil composition,
In addition, the composition of the base oil is shown by a value that does not include the amount of the mineral oil contained in the mixture.

On the other hand, apart from the above cutting oil compositions, commercially available cutting oil compositions (Comparative Examples 6 to 11) of the type shown in Table 3 below were prepared. Specifically, as the cutting oil composition of Comparative Example 6, a water-soluble solution containing a chlorine-based extreme pressure additive diluted three-fold was used, and as the composition of Comparative Example 7, a chlorine-based extreme pressure was used. A three-fold diluted water-soluble emulsion containing an additive was used. Also,
The cutting oil composition of Comparative Example 8 was insoluble in water composed of vegetable oil, and Comparative Example 9 was chlorinated as a chlorine-based extreme pressure additive with respect to mineral oil as a base oil. It is a water-insoluble composition containing paraffin. Further, the cutting oil compositions of Comparative Examples 10 and 11 are water-insoluble compositions obtained by adding a sulfur-based extreme pressure additive and a calcium sulfonate-based compound to a predetermined base oil. Table 3 below also shows the trade names of the cutting oil compositions, the content of the chlorine-based extreme pressure additive, and the kinematic viscosity at a temperature of 40 ° C.

[0038] *: Kinematic viscosity at 40 ° C

[0039] *: Kinematic viscosity at 40 ° C

[0040] *: Kinematic viscosity at 40 ° C

Using the cutting oil compositions thus prepared or prepared, a cutting test of stainless steel was performed using a circular saw cutting machine. Specifically, a 50 mmφ peeling material made of SUS304 was used as stainless steel, and each cutting oil composition was sprayed in a mist state at a liquid supply rate of 0.3 mL / min using a commercially available spraying device. Meanwhile, a predetermined cutting process was performed using a swing type circular saw cutting machine (manufactured by Kanebo Co., Ltd .; type 65), and the cutting or cutting performance of each composition was evaluated.

The swing type circular saw cutting machine used in this embodiment has a structure as shown in FIG. 1 specifically, and the rotation of the electric motor 2 causes the electric motor 2 to rotate. On the other hand, the circular saw 8 connected via the belt 4 and the gear mechanism 6 is rotated around its rotary shaft 10, and the rotary shaft 10 of the circular saw 8 is pivotally supported by the operation of the cylinder mechanism 12. The support block 14 is driven to swing around the fulcrum 16, that is, the circular saw 8 is fed (swinged) around the fulcrum 16, so that a predetermined workpiece (peeling material) 18 is cut. It is something that can be applied. The electric motor 2, the belt 4, and the gear mechanism 6 are also provided on the support block 1.
Needless to say, even if the support block 14 is swing-driven by the support 4, the rotation of the circular saw 8 is not hindered.

In this embodiment, the circular saw (8) has an outer diameter of 280 mmφ × saw thickness: 2.0 mm.
^t × Saw body thickness: A grooved blade having a shape of 1.75 mm ^t and having 60 teeth was used. Further, as a chip constituting such a cutting blade, a chip made of a high-toughness cermet and a cemented carbide (corresponding to P30) was used, and in the case of using each of them, the cutting (cutting) performance was evaluated. However, when a high-toughness cermet tip is used as the cutting edge tip, under the conditions of a circular saw with a rotation speed of 90 rpm and a cutting depth per blade: 0.07 mm / blade,
When a cutting edge tip made of a cemented carbide is used, the rotation speed of the circular saw is 70 rpm, and the cutting depth per tooth is 0.07.
Under the condition of mm / blade, cutting was performed so that the thickness of the product after cutting was 5 mm. Furthermore, during the cutting process, the work of removing the chips attached to the cutting blade tip was performed by a brush. Furthermore, such a cutting process is performed indoors, and the room temperature at that time is 10 to
20 ° C.

Further, as an evaluation of the cutting (cutting) performance, cutting processing was performed for a maximum of 1000 cuts (here, one swing of a circle was defined as one cut), and the life characteristics of the circle were examined. The results are shown in Tables 4 and 5 below. In the table, ○: When cutting is possible even after cutting of 1000 cuts, ×:
Before or at the time of reaching 1000 cuts, if it is not possible to perform further cutting processing,
In short, it shows the case where the circular saw (cutting edge tip) has reached the end of its life. Tables 4 and 5 below show the number of cuts that can be cut (that is, the number of cuts at the time when the circular saw reaches the end of the life when the above evaluation is x, and the number of cuts when Has a maximum number of processing of 100
0), the chipping (C
The number of p), the cause of damage such as chipping or the life factor of the circular saw, and other problems are also shown. In this context, `` difficult to release thin cutting material '' means that the cut surfaces of the product after cutting are strongly adhered to each other due to the oil film of the cutting oil composition adhered, and cannot be easily separated. Shows, and
"Adhesion and biting of chips to the cutting edge" means that chips immediately after the generation of strong austenitic stainless steel adhesiveness adhere to the cutting edge chip and can be removed by the chip removal brush. It shows that the cutting edge chip cuts into the workpiece while the chip is attached to the cutting edge chip. Further, "the generation of thermal cracks in the cutting edge" means that the generation of cutting heat and the cutting oil composition This indicates that the cutting edge tip repeatedly undergoes severe inflation and contraction due to the excessive cooling effect of, and cracks are generated in the cutting edge tip.

[0045]

[0046]

As is clear from Tables 4 and 5, when the cutting fluid compositions of Examples 1 to 3 of the present invention are used, adhesion between the cutting edge chip and chips or work material is reduced. By being greatly suppressed, the chips are easily discharged from the cutting edge tip, the biting of the chips is avoided, and since a good cooling function works, even after the machining operation of 1000 cuts is performed. It can be seen that no chipping can be observed, and that further processing can be continued. Furthermore, since the cutting oil compositions according to the present invention have high lubricity, even after 1000 cuts, damage to the cut surface due to contact between the cut surface and the chips is
Few were recognized.

On the other hand, in the cutting oil composition of Comparative Example 1, in terms of cutting performance, Example 1 of the present invention was used.
However, since the kinematic viscosity is high, it is troublesome to remove the oil adhering to the cutting material after the cutting operation, as in the present embodiment. When the material is cut into thin pieces, there is a problem that the cut materials are strongly adhered to each other, making it difficult to separate them. Further, it has been extremely difficult to make such a composition into a mist with a commercially available spraying device.

When the composition of Comparative Example 2 having a low kinematic viscosity and containing no methacrylate-based polymer was used, in the initial stage of cutting when the number of cuts was small, there was no adhesion of chips and the cut surface The condition was good, but the cutting temperature increased with an increase in the number of cuts, and the lubrication effect could not be sufficiently exhibited. It can no longer be removed, resulting in chip entrapment, the impact of which can cause chipping of some of the cutting edges and accumulation of some of the chips on the rake face of the cutting insert. As a result, it was confirmed that the cutting power increased and the cut surface became rough. Furthermore, it has been observed that a part of the work material adheres to the side surface of the cutting edge tip, which makes it impossible to cut straight and causes bending. Such a tendency was remarkable when a high toughness cermet tip having a low thermal conductivity and a high cutting temperature was used as the cutting edge tip.

Further, in the composition of Comparative Example 3 in which the content of the methacrylate-based polymer was as large as 20% by weight,
Since the kinematic viscosity was increased, it was recognized that the same problem as in the case of Comparative Example 1 could be caused. In addition, by adding a methacrylate-based polymer in such an amount, the cut number increased as the number of cuts increased. It is recognized that chipping occurs in the blade, cutting performance is reduced, and cutting of 1000 cuts or more becomes impossible. Further, although the cutting oil composition of Comparative Example 4 can be processed up to 1000 cuts, the cutting amount is significantly reduced as compared with that of the above-mentioned Example of the present invention. With an increase in the number, adhesion between the cutting tip and the chip occurs, and since such a chip cannot be removed with a brush, the biting causes chipping in the cutting tip. I understand that there is.

Further, the cutting oil composition of Comparative Example 5
Unlike the examples of the present invention, the calcium sulfonate-based compound or the zinc sulfonate-based compound is not contained, so that the chip and the cutting material with respect to the cutting edge chip are insufficient in the adhesion resistance of the work material. It can be understood that the biting of chips and, eventually, chipping are caused to shorten the life of the circular saw (cutting edge chip).

On the other hand, when the water-soluble cutting oil compositions of Comparative Examples 6 and 7, which are conventional products, are used, their cutting performance is too high due to their excessively high cooling performance. Due to the repetition of heat generation and cooling at the time of non-cutting, in the early stage of processing work, a thermal crack occurs at the boundary from the rake face to the outer diameter flank, and from the rake face to the outer diameter flank as a starting point, It was noted that on-chip chipping would occur.

Further, when the cutting oil composition comprising the vegetable oil of Comparative Example 8 as another conventional example was used, an effective lubricating action was not exhibited between the chip and the cutting edge interface. The chips and the cutting edge chips adhered to each other, so that the chips could not be removed by the brush. As a result, the chips were bitten, and a part of the cutting edge was chipped by the impact. In addition, it was found that a part of the chips adhered to the rake face of the cutting edge chip was deposited, the cutting power gradually increased, and the cut surface was roughened. In addition, some of the work material settled on the side of the cutting tip, which made it impossible to cut straight and caused bending. In addition, such a tendency,
In the case where a high-toughness cermet chip having a low thermal conductivity and a high cutting temperature was used, the cermet chip appeared remarkably.

Further, as is well known, the cutting oil composition of Comparative Example 9 containing a large amount of chlorinated paraffin has a high extreme pressure property, and is excellent in cutting tip, chip and work material. It can be recognized from the results in Tables 4 and 5 that, because of the low adhesiveness of the stainless steel, the steel exhibits excellent cutting performance in the cutting of stainless steel such as SUS304. It has been found that its use causes rust in steel parts whose temperature rises, for example, circular saw metal.

Further, as in Comparative Examples 10 and 11,
When commercially available sulfur-based cutting oil compositions are used, they contain calcium sulfonate-based compounds, but do not contain any methacrylate-based polymers, and have low kinematic viscosity. In the same manner as in the composition of Comparative Example 2, in the initial stage of cutting, there was no adhesion of chips and the cut surface was good, but the cutting temperature increased as the number of cuts increased, and the lubricating performance decreased. The chip and the cutting edge chip adhere to each other, causing the chip to bite, thereby causing chipping of the cutting edge and gradually increasing the cutting power due to the accumulation of the chip on the rake face of the cutting edge chip. As a result, the cut surface became rough. In addition, adhesion between the work material and the cutting edge chip also occurred, resulting in bending. In addition,
Such a problem is particularly prominent when a cutting edge tip made of a high-toughness cermet is used.

[0056]

As is apparent from the above description, the water-insoluble cutting and grinding oil composition according to the present invention has three specific components, namely, a methacrylate polymer,
A sulfur-based extreme pressure additive is used in combination with a calcium sulfonate or zinc sulfonate compound,
By being configured to include these three components, an effective synergistic effect can be exhibited. Therefore, even if the amount is small, not only the metal material which is relatively easy to process but also stainless steel is used. Even for difficult-to-cut materials such as steel, it has the characteristic that it can perform cutting and grinding with excellent performance comparable to the case of using chlorine-based cutting and grinding oil, and it is Since it is possible to spray advantageously in the form of a mist, and in such a spray, the kinematic viscosity is adjusted to such an extent that the scattering of the mist can be effectively suppressed. Cutting and grinding metal materials at low cost and high quality while maintaining a good working environment by performing the cutting and grinding processing while spraying the intended metal material using the grinding oil composition. Or One in which there is an effect that can be allowed to work.

Further, the water-insoluble cutting and grinding oil composition of the present invention contains no compound containing a halogen element.
In addition to the advantage that the impact on tools and the like is extremely small and that the spraying with reduced scattering is possible, the advantage that the safety for workers can be secured at a very high level is also obtained.
It also brings.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing the structure of a swing type circular saw cutting machine used in an embodiment.

[Explanation of symbols]

 8 Circular saw 18 Work material

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C10M 135: 10) C10N 10:04 30:12 40:22 50:04 (72) Inventor Yutaka Ishimatsu Aichi 36-1 Higashiishine, Ichiriyama-cho, Kariya-shi Sanwa Yuka Kogyo Co., Ltd. (72) Inventor Satoru Satoru 1-1-1, Nakakoguchi, Oguchi-machi, Niwa-gun, Aichi Prefecture K-fusa Co., Ltd. F-term (reference) 4H104 BG06C BG12C CB08C CB08C CE01C DB07C EA02Z FA02 LA03 LA15 PA22 PA35 QA09

Claims (6)

[Claims] 1. General formula: CH ₂ ＣC (CH ₃ ) COOR
(However, R is an alkyl group having 8 to 18 carbon atoms)
And 0.5 to 15% by weight of a methacrylate-based polymer composed of a homopolymer of a methacrylate monomer represented by the formula (I) or a copolymer of another monomer containing no halogen element and copolymerizable with such a monomer. Containing 5 to 25% by weight of a sulfur-based extreme pressure additive and 2 to 15% by weight of a calcium sulfonate or zinc sulfonate-based compound,
The remainder consists of base oil and the kinematic viscosity is 40
At a temperature of ° C., water-insoluble cutting and grinding oil composition which is a 50 to 100 mm ² / sec. 2. The method according to claim 1, wherein the methacrylate-based polymer is combined with the methacrylate monomer by a general formula: CH ₂ ＣC.
(CH ₃ ) COO-AN (R ′) ₂ (where A is 2 to
6. The water-insoluble compound according to claim 1, which is a copolymer with a dialkylaminoalkyl methacrylate monomer represented by the formula: wherein the alkylene group has 6 carbon atoms and R 'is a methyl group, an ethyl group or a propyl group. Cutting and grinding oil composition. 3. The water-insoluble cutting and grinding oil composition according to claim 1, wherein the sulfur-based extreme pressure additive is a dialkyl polysulfide having an alkyl group having 8 to 18 carbon atoms. 4. The water-insoluble cutting / grinding oil composition according to claim 1, wherein the calcium sulfonate or zinc sulfonate compound is a calcium salt or a zinc salt of alkylbenzenesulfonic acid. 5. The cutting and grinding of a metal material by spraying the water-insoluble cutting and grinding oil composition according to any one of claims 1 to 4 on a metal material in the form of a mist.
A method for processing a metal material, comprising performing grinding. 6. The method for processing a metal material according to claim 5, wherein the cutting and grinding of the metal material is cutting of stainless steel by a circular saw.