EP3974500A1 - Cooling lubricant - Google Patents
Cooling lubricant Download PDFInfo
- Publication number
- EP3974500A1 EP3974500A1 EP21198607.0A EP21198607A EP3974500A1 EP 3974500 A1 EP3974500 A1 EP 3974500A1 EP 21198607 A EP21198607 A EP 21198607A EP 3974500 A1 EP3974500 A1 EP 3974500A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling lubricant
- milliliters
- water
- propylene glycol
- ethylene glycol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000005068 cooling lubricant Substances 0.000 title claims abstract description 146
- 229920005862 polyol Polymers 0.000 claims abstract description 56
- 150000003077 polyols Chemical class 0.000 claims abstract description 56
- 229920000642 polymer Polymers 0.000 claims abstract description 23
- 239000007864 aqueous solution Substances 0.000 claims abstract description 21
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 215
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 202
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 79
- 239000006254 rheological additive Substances 0.000 claims description 25
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 13
- 229920002125 Sokalan® Polymers 0.000 claims description 13
- 150000007514 bases Chemical class 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 5
- 229960001631 carbomer Drugs 0.000 claims description 5
- 239000000499 gel Substances 0.000 claims description 5
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 3
- GJCOSYZMQJWQCA-UHFFFAOYSA-N 9H-xanthene Chemical compound C1=CC=C2CC3=CC=CC=C3OC2=C1 GJCOSYZMQJWQCA-UHFFFAOYSA-N 0.000 claims description 2
- 229920001817 Agar Polymers 0.000 claims description 2
- 241000206672 Gelidium Species 0.000 claims description 2
- 235000010419 agar Nutrition 0.000 claims description 2
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 150000001340 alkali metals Chemical class 0.000 claims description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 2
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 2
- 239000000679 carrageenan Substances 0.000 claims description 2
- 235000010418 carrageenan Nutrition 0.000 claims description 2
- 229920001525 carrageenan Polymers 0.000 claims description 2
- 229940113118 carrageenan Drugs 0.000 claims description 2
- 229930182830 galactose Natural products 0.000 claims description 2
- 150000004676 glycans Chemical class 0.000 claims description 2
- 239000000416 hydrocolloid Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 2
- 229920001282 polysaccharide Polymers 0.000 claims description 2
- 239000005017 polysaccharide Substances 0.000 claims description 2
- 229920001285 xanthan gum Polymers 0.000 claims description 2
- UHVMMEOXYDMDKI-JKYCWFKZSA-L zinc;1-(5-cyanopyridin-2-yl)-3-[(1s,2s)-2-(6-fluoro-2-hydroxy-3-propanoylphenyl)cyclopropyl]urea;diacetate Chemical compound [Zn+2].CC([O-])=O.CC([O-])=O.CCC(=O)C1=CC=C(F)C([C@H]2[C@H](C2)NC(=O)NC=2N=CC(=CC=2)C#N)=C1O UHVMMEOXYDMDKI-JKYCWFKZSA-L 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 44
- 238000005553 drilling Methods 0.000 description 34
- 229910052742 iron Inorganic materials 0.000 description 22
- 229920001451 polypropylene glycol Polymers 0.000 description 18
- 238000010586 diagram Methods 0.000 description 16
- 229920001223 polyethylene glycol Polymers 0.000 description 14
- 238000000034 method Methods 0.000 description 13
- 239000000203 mixture Substances 0.000 description 13
- 239000002202 Polyethylene glycol Substances 0.000 description 12
- 230000017525 heat dissipation Effects 0.000 description 6
- 238000003754 machining Methods 0.000 description 5
- 239000010730 cutting oil Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 239000002173 cutting fluid Substances 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000003349 gelling agent Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 239000011449 brick Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- XLYOFNOQVPJJNP-DYCDLGHISA-N deuterium hydrogen oxide Chemical compound [2H]O XLYOFNOQVPJJNP-DYCDLGHISA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 229920006158 high molecular weight polymer Polymers 0.000 description 1
- 239000002050 international nonproprietary name Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- 229920005903 polyol mixture Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M173/00—Lubricating compositions containing more than 10% water
- C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups
- C10M2207/0225—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
- C10M2209/084—Acrylate; Methacrylate
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/12—Polysaccharides, e.g. cellulose, biopolymers
- C10M2209/126—Polysaccharides, e.g. cellulose, biopolymers used as thickening agents
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/20—Metal working
- C10N2040/22—Metal working with essential removal of material, e.g. cutting, grinding or drilling
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/20—Metal working
- C10N2040/243—Cold working
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/20—Metal working
- C10N2040/244—Metal working of specific metals
- C10N2040/246—Iron or steel
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/10—Semi-solids; greasy
Definitions
- the present invention relates to the use of a cooling lubricant according to claim 1.
- Cooling lubricants are often used in the machining of workpieces. Examples of the machining of workpieces are drilling, cutting, turning, milling, grinding, etc.
- One of the tasks of the cooling lubricant is to reduce the friction between the tool and the workpiece and to dissipate the heat generated.
- cooling lubricants Different types are known from the prior art. For example, a distinction is made between aqueous cooling lubricants and oil-based cooling lubricants. While the known aqueous cooling lubricants generally provide good heat dissipation, their lubricating effect is often limited. In comparison, the oil-based cooling lubricants have a better lubricating effect, but the low heat capacity of the oils leads to a limited cooling effect.
- a cooling lubricant is to be specified which brings about good heat dissipation or friction reduction and at the same time is well tolerated.
- a cooling lubricant for heat dissipation and / or reducing friction between a tool, in particular a drill, and a workpiece is specified, the cooling lubricant i) an aqueous solution and ii) a or more polyols and/or one or more polymers of one or more polyols.
- the workpiece preferably comprises any building material such as stone, wood, concrete, plaster, brick, ceramic, metal, clay, plastic.
- building material such as stone, wood, concrete, plaster, brick, ceramic, metal, clay, plastic.
- other workpieces are also conceivable.
- the cooling lubricant can comprise only one polyol or several polyols. It is just as conceivable that the cooling lubricant can comprise only one polymer from a polyol or two or more polymers from a polyol. It is also conceivable that the cooling lubricant can comprise one or more polyols and one or more polymers of a polyol. In the case of two or more polyols or two or more polymers of one polyol, these are preferably different polyols or different polymers.
- the cooling lubricant is preferably in the form of a gel.
- the gel-like cutting fluid is particularly advantageous for applications in difficult conditions, such as drilling vertical holes in ceilings or drilling in sensitive areas such as shop windows.
- the gel-like property of the cooling lubricant prevents the cooling lubricant from flowing away and instead ensures that the cooling lubricant remains on the workpiece.
- the cooling lubricant preferably further comprises at least one rheology modifier.
- the rheology modifier comprises or is at least one acrylic acid and/or a polymer of an acrylic acid and/or at least one polysaccharide and/or at least one hydrocolloid.
- the rheology modifier comprises or is a carbomer and/or xanthan and/or carrageenan and/or a galactose polymer such as agar agar.
- Carbomers are high molecular weight polymers of acrylic acid that are crosslinked with polyalkene ethers of sugars or polyalcohols.
- carbomer is an international non-proprietary name INN.
- a preferred carbomer is a Carbopol® 940 polymer.
- the at least one rheology modifier is therefore preferably at least one gelling agent and/or at least one thickener.
- a concentration of the rheology modifier is preferably between 0.25% (weight/volume) and 4.5% (weight/volume), particularly preferably between 0.5% (weight/volume) and 4.0% (weight/volume). Additionally or alternatively, a preferred concentration of the rheology modifier is at least 0.25% (weight/volume), in particular at least 0.5% (weight/volume).
- the specified concentration of the rheology modifier relates to a total quantity of the rheology modifier in relation to a total volume of the cooling lubricant.
- the total amount of the rheology modifier is preferably in grams and the total volume is preferably in milliliters specified. If, for example, 1 gram of rheology modifier is added to a cooling lubricant consisting of 100 milliliters of a first polyol, 50 milliliters of a second polyol and 50 milliliters of an aqueous solution, the concentration of the rheology modifier is 0.5% (weight/volume).
- the at least one polyol is preferably at least one dialcohol.
- Preferred dialcohols are alkanediols.
- the at least one polyol is ethylene glycol and/or propylene glycol.
- the at least one polyol is therefore preferably at least one glycol.
- a conceivable polymer of the glycol is polyglycol.
- Preferred polymers of the polyols are thus preferably polyethylene glycol and polypropylene glycol.
- the at least one polyol is preferably mono-ethylene glycol or mono-propylene glycol and polymers thereof, preferably polyethylene glycol or polypropylene glycol.
- the cooling lubricant can comprise mono-ethylene glycol, or the cooling lubricant can comprise mono-propylene glycol, or the cooling lubricant can comprise polyethylene glycol, or the cooling lubricant can comprise polypropylene glycol. Mixtures thereof are also particularly preferred, e.g.
- a cooling lubricant comprising mono-ethylene glycol and one or more polypropylene glycols, or a cooling lubricant comprising mono-propylene glycol and one or more polyethylene glycols, or a cooling lubricant comprising one or more polyethylene glycols and one or more polypropylene glycols.
- polymers of the polyol preferably have essentially the same average molecular weight.
- Particularly preferred polymers of the polyols are polypropylene glycol PPG 400 and Macrogolum 400. It is also preferred if there is more ethylene-based polyol than propylene-based polyol in a mixture. Polyol mixtures comprising ethylene-based polyol and propylene-based polyol in a ratio of 2:1 are preferred.
- the aqueous solution preferably comprises or consists of water, in particular demineralized water.
- the cooling lubricant can further comprise at least one basic compound.
- the at least one basic compound is preferably a hydroxide of an alkali metal or an alkaline earth metal, most preferably sodium hydroxide.
- the at least one basic compound is preferably present in dissolved form.
- the at least one basic compound is particularly preferably dissolved in the aqueous solution.
- the pH of the cooling lubricant is preferably between 5 and 8, in particular between 6 and 7.
- a density of the cooling lubricant is preferably between 0.75 g/cm 3 and 1.5 g/cm 3 , in particular between 1.08 g/cm 3 and 1.12 g/cm 3 , and particularly preferably 1.10 g/cm 3 .
- the densities mentioned were each determined at a temperature of 24.degree. The temperature was measured with a Bentech GM900 thermometer.
- a density of 1.10 g/cm3 at a temperature of 24°C is obtained, for example, by 100 grams of ethylene glycol, 50 grams of propylene glycol, 50 grams of water, and 4 grams of Carbopol® 940 polymer.
- the cooling lubricant preferably comprises ethylene glycol and propylene glycol, with a volume ratio of ethylene glycol to propylene glycol being between 10:0.1 to 0.1:10, preferably between 5:0.5 to 0.5:5 and particularly preferably between 2:0.75 to 0.75:2.
- a volume ratio of ethylene glycol to propylene glycol of 0.75:1 is preferred, provided for example by 75 milliliters of ethylene glycol and 100 milliliters of propylene glycol. More preferred is a volume ratio of ethylene glycol to propylene glycol of 1:1, provided for example by 100 milliliters of ethylene glycol and 100 milliliters of propylene glycol. More preferred is a volume ratio of ethylene glycol to propylene glycol of 1:0.75, provided for example by 100 milliliters of ethylene glycol and 75 milliliters of propylene glycol. More preferred is a volume ratio of ethylene glycol to propylene glycol of 2:1, provided for example by 100 milliliters of ethylene glycol and 50 milliliters of propylene glycol.
- the cooling lubricant preferably comprises ethylene glycol and water, with a volume ratio of ethylene glycol to water being between 2:0.1 to 1:0.5, preferably between 1:0.25 to 1:1.
- the cooling lubricant preferably comprises propylene glycol and water, with a volume ratio of propylene glycol to water being between 2:0.1 to 0.5:1, preferably between 1:0.25 to 0.75:1.
- a volume ratio of ethylene glycol to water of 1:1 is preferred, for example provided by 100 milliliters of ethylene glycol and 100 milliliters of water. More preferred is a volume ratio of ethylene glycol to water of 1:0.75, provided for example by 100 milliliters of ethylene glycol and 75 milliliters of water. More preferred is a volume ratio of ethylene glycol to water of 1:0.5, provided for example by 100 milliliters of ethylene glycol and 50 milliliters of water. More preferred is a volume ratio of ethylene glycol to water of 1:0.25, provided for example by 100 milliliters of ethylene glycol and 25 milliliters of water.
- a volume ratio of propylene glycol to water of 1:1 is preferred. More preferred is a volume ratio of propylene glycol to water of 1:0.75, provided for example by 100 milliliters of propylene glycol and 75 milliliters of water. More preferred is a volume ratio of propylene glycol to water of 1:0.5, provided for example by 100 milliliters of propylene glycol and 50 milliliters of water. More preferred is a volume ratio of propylene glycol to water of 1:0.25, provided for example by 100 milliliters of propylene glycol and 25 milliliters of water.
- volume ratio of propylene glycol to water of 0.75:1 provided for example by 75 milliliters of propylene glycol and 100 milliliters of water. More preferred is a volume ratio of propylene glycol to water of 0.75:0.5, provided for example by 75 milliliters of propylene glycol and 50 milliliters of water. More preferred is a volume ratio of propylene glycol to water of 0.75:0.25, provided for example by 75 milliliters of propylene glycol and 25 milliliters of water.
- cooling lubricant comprises ethylene glycol, propylene glycol and water
- a preferred volume ratio of ethylene glycol to propylene glycol to water is 1:1:1, provided for example by 100 milliliters of ethylene glycol, 100 milliliters of propylene glycol, and 100 milliliters of water.
- a volume ratio of ethylene glycol to propylene glycol to water of 1:1:0.75 is more preferred, for example provided by 100 milliliters of ethylene glycol, 100 milliliters of propylene glycol, and 75 milliliters of water.
- a volume ratio of ethylene glycol to propylene glycol to water of 1:1:0.5 is more preferred, for example provided by 100 milliliters of ethylene glycol, 100 milliliters of propylene glycol, and 50 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 1:1:0.25, provided for example by 100 milliliters of ethylene glycol, 100 milliliters of propylene glycol, and 25 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 1:0.75:1, provided for example by 100 milliliters of ethylene glycol, 75 milliliters of propylene glycol, and 100 milliliters of water.
- More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 1:0.75:0.75, provided for example by 100 milliliters of ethylene glycol, 75 milliliters of propylene glycol, and 75 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 1:0.75:0.5, provided for example by 100 milliliters of ethylene glycol, 75 milliliters of propylene glycol, and 50 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 1:0.75:0.25, provided for example by 100 milliliters of ethylene glycol, 75 milliliters of propylene glycol, and 25 milliliters of water.
- More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 1:0.5:0.25, provided for example by 100 milliliters of ethylene glycol, 50 milliliters of propylene glycol, and 25 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 1:0.5:0.5, provided for example by 100 milliliters of ethylene glycol, 50 milliliters of propylene glycol, and 50 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 0.75:1:0.25, for example provided by 75 milliliters of ethylene glycol, 100 milliliters of propylene glycol, and 25 milliliters of water.
- More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 0.75:1:0.5, for example provided by 75 milliliters of ethylene glycol, 100 milliliters of propylene glycol, and 50 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 0.5:1:0.25, provided for example by 50 milliliters of ethylene glycol, 100 milliliters of propylene glycol, and 25 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 0.5:1:0.5, provided for example by 50 milliliters of ethylene glycol, 100 milliliters of propylene glycol, and 50 milliliters of water.
- the cooling lubricant is preferably applied to the tool immediately before the workpiece is machined.
- the application can be carried out by the user himself, for example by transferring a dose of the cooling lubricant to the tool with his fingers or with an aid such as a spatula.
- the dose of cooling lubricant depends on the size or diameter of the tool. In the case of a typical drill, for example, very good results have been obtained with a dose of as little as about 0.1 gram of coolant or more, particularly with 0.15 grams, 0.2 grams, and 0.35 grams of coolant. Of course, much larger doses can also be used.
- a method for producing a cooling lubricant for dissipating heat and/or reducing friction between a tool and a workpiece is specified.
- a method for producing a cooling lubricant as described above is specified. The method comprises the step of providing an aqueous solution and one or more polyols and/or one or more polymers of one or more polyols, with the cooling lubricant being present in particular as a gel.
- At least one first polyol in particular a dialcohol, particularly preferably propylene glycol, is preferably added to the aqueous solution in a step (i).
- a further step (ii) preferably at least one second polyol, in particular a dialcohol, particularly preferably ethylene glycol, is added to the aqueous solution. It is also preferred if at least one rheology modifier is added to the aqueous solution between step (i) and the further step (ii).
- Steps (i) and (ii) are thus preferably carried out in succession.
- the first mixture can be stirred with a stirring device such as a mixer.
- the second polyol can then be added to the first mixture, with a second mixture comprising the aqueous solution, the first polyol and the second polyol is produced.
- a rheology modifier for example a thickener and/or gelling agent
- a second mixture comprising the aqueous solution, the first polyol, and the rheology modifier would thus be produced.
- This second mixture can also be mixed with a stirring device.
- the second polyol can then be added to the second mixture, creating a third mixture comprising the first polyol, the rheology modifier, and the second polyol.
- a basic compound such as a sodium hydroxide solution is added to the aqueous solution.
- the aqueous solution could be provided first.
- the first polyol could be added to the aqueous solution.
- the rheology modifier could then be added to the aqueous solution comprising the first polyol.
- the basic compound could then be added to the aqueous solution comprising the first polyol and the rheology modifier.
- the second polyol could then be added to the aqueous solution comprising the first polyol, the rheology modifier, and the basic compound.
- a basic compound could then again be added to the aqueous solution comprising the first polyol, the rheology modifier, the basic compound from the previous step, and the second polyol.
- the figure 1 shows a collection container 6 containing the cooling lubricant 1, a dose 5 of the cooling lubricant 1 being removed from the collection container 6 and applied to a drill bit (not shown).
- the figure 2 shows a drill bit 3 of a drill 2 comprising a dose 5 of the cooling lubricant 1, wherein machining of the workpiece 4 has not yet started and the drill bit 3 is consequently in the idle state.
- figure 3 shows the drill bit 3 having the cooling lubricant 1 during a drilling operation, with the drill bit 3 rotating.
- the cooling lubricant 1 shown in these figures is a cooling lubricant comprising 100 ml mono-ethylene glycol, 50 ml mono-propylene glycol, 50 ml water and 4 grams of the carbomer Carpopol 940 having the CAS number 9007-20-9. How good from the Figures 1 to 3 shows that it is a gel-like cooling lubricant 1. A corresponding depression 7 remains in the cooling lubricant 1 in the collection container 6 at the location of the removed dose 5 (see figure 1 ) and the dose 5 of cooling lubricant 1 applied to the drill bit 3 remains in place (see figure 2 ), ie the cooling lubricant 1 does not flow in the stationary state, but behaves as a semi-solid. Also shown during the drilling process in figure 3 the cooling lubricant 1 remains essentially in place, with in particular no spraying or flowing away of the cooling lubricant 1 being observed.
- the second cooling lubricant b) tested is a cooling lubricant comprising 100 milliliters of mono-ethylene glycol and 50 milliliters of mono-propylene glycol.
- the third cooling lubricant c) tested is a cooling lubricant according to the invention comprising 100 milliliters of monoethylene glycol, 50 milliliters of monopropylene glycol and 50 milliliters of water.
- the fourth cooling lubricant d) tested is another cooling lubricant according to the invention comprising 100 milliliters of monoethylene glycol, 50 milliliters of monopropylene glycol, 50 milliliters of demineralized water and 4 grams Carbopol 940.
- the fifth cooling lubricant e) tested is another cooling lubricant according to the invention comprising 100 milliliters of mono-ethylene glycol, 50 milliliters of mono-propylene glycol, 50 milliliters of water and 1 gram of Carbopol 940.
- the drill tip temperature increases at a slower rate, but continues to increase linearly, with a drill tip temperature of around 36 °C being measured at the end of the drilling process after 120 seconds of drilling.
- the other four cooling lubricants b) to e) lead to a significantly different temperature profile.
- an essentially constant temperature profile can be observed after an initial drilling time.
- cooling lubricants b) and c) during the initial drilling time of around 30 seconds, there is an almost linear temperature increase from the initial ambient temperature of 24 °C to around 26.5 °C (cooling lubricant c)) or around 27.5 °C (cooling lubricant b) ) observed.
- cooling lubricants d) and e on the other hand, only after a drilling time of around 20 seconds is there a small jump in temperature from the initial ambient temperature of around 24 °C to around 25 °C (cooling lubricant e)) or around 26 °C (cooling lubricant d )) was observed.
- the drill bit having the cooling lubricant b) has the highest temperature and the cooling lubricant e) has the lowest temperature of these four cooling lubricants.
- the cooling lubricants according to the invention including Carbopol 940, lead to the best results.
- the good heat dissipation and friction reduction of the cooling lubricants according to the invention is also due to the in figure 5 diagram shown.
- the cooling lubricant b) requires the shortest time for piercing.
- a 10 mm thick iron plate is pierced after 29 seconds, a 30 mm thick iron plate after 58 seconds, and a 30 mm iron plate after 87 seconds.
- a similar time course is found for the cooling lubricant c) according to the invention.
- a 10 mm thick iron plate is pierced after 30 seconds, a 30 mm thick iron plate after 60 seconds and a 30 mm iron plate after 90 seconds. While both of these cutting fluids allow for the fastest penetration, they result in higher drill bit temperatures, see discussions related to figure 4 above.
- the lowest temperature curve and a faster drilling time than the commercial cooling lubricant a) could be determined for the cooling lubricant e) according to the invention.
- a 10 mm thick iron plate is pierced after 32 seconds, a 20 mm thick iron plate after 64 seconds, and a 30 mm thick iron plate after about 96 seconds.
- the cooling lubricant d) according to the invention slightly more time is required for these thicknesses, namely about 34 seconds in the case of the 10 millimeter thick iron plate, about 68 seconds in the case of the 20 millimeter thick iron plate, and about 102 seconds in the case of the 30 millimeter thick iron plate.
- the commercially available drilling and cutting oil spray WD-40 here cooling lubricant a
- FIGs 6a to 9b show the temperature curve of a drill bit over time during a drilling process for other different cooling lubricants.
- a dose of about 4 grams of cooling lubricant was applied to a drill bit with a diameter of 12 millimeters, and then an iron plate was perforated with this drill bit at a drill speed of 200 rpm, during which the temperature of the drill bit was measured at regular intervals.
- the figures 6b , 7b , 8b and 9b show the times required for drilling through workpieces of different thicknesses with a drill bit using these different cooling lubricants.
- cooling lubricants were each applied to a drill bit with a diameter of 12 millimeters, iron plates of different thicknesses being drilled through at a speed of 200 rpm. The time required to drill through the iron plates of different thicknesses was recorded.
- cooling lubricants in the Figures 7a and 7b 100 milliliters of mono-ethylene glycol and 50 milliliters of polypropylene glycol (a), 50 milliliters of mono-propylene glycol and 100 milliliters of polyethylene glycol (b), and 100 milliliters of polyethylene glycol and 50 milliliters of polypropylene glycol (c).
- cooling lubricants in the Figures 8a and 8b these are 100 milliliters of mono-ethylene glycol, 50 milliliters of polypropylene glycol, 50 milliliters of water and 4 grams of carbopol (a), 50 milliliters of mono-propylene glycol, 100 milliliters of polyethylene glycol, 50 milliliters of water and 4 grams of carbopol (b), and to 100 milliliters of polyethylene glycol, 50 milliliters of polypropylene glycol, 50 milliliters of water and 4 grams of carbopol (c).
- the cooling lubricants according to the invention allow shown in the Figures 8a to 9b overall faster perforation at lower temperatures. Namely, for that in the Figures 6a and 6b With the cooling lubricant shown, the temperature rose to 32°C and more, and drilling times of 120 seconds and more were required to drill through, for example, a 3 cm thick iron plate.
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Abstract
Ein Kühlschmiermittel (1) für die Wärmeabfuhr und/oder Verminderung der Reibung zwischen einem Werkzeug (2), insbesondere einem Bohrer, und einem Werkstück (4), umfasst eine wässrige Lösung und ein oder mehrere Polyole und/oder ein oder mehrere Polymere von einem oder mehreren Polyolen. Das Kühlschmiermittel (1) liegt vorzugsweise als Gel vor.A cooling lubricant (1) for dissipating heat and/or reducing friction between a tool (2), in particular a drill, and a workpiece (4), comprises an aqueous solution and one or more polyols and/or one or more polymers of one or more polyols. The cooling lubricant (1) is preferably in the form of a gel.
Description
Die vorliegende Erfindung betrifft die Verwendung eins Kühlschmiermittels gemäss Anspruch 1.The present invention relates to the use of a cooling lubricant according to
Kühlschmiermittel werden häufig bei der spanabhebenden Bearbeitung von Werkstücken eingesetzt. Beispiele für die spanabhebende Bearbeitung von Werkstücken sind Bohren, Schneiden, Drehen, Fräsen, Schleifen, usw. Eine Aufgabe der Kühlschmiermittel besteht dabei darin, die Reibung zwischen Werkzeug und Werkstück zu verringern und die entstehende Wärme abzuführen.Cooling lubricants are often used in the machining of workpieces. Examples of the machining of workpieces are drilling, cutting, turning, milling, grinding, etc. One of the tasks of the cooling lubricant is to reduce the friction between the tool and the workpiece and to dissipate the heat generated.
Aus dem Stand der Technik sind unterschiedliche Typen von Kühlschmiermittel bekannt. So unterscheidet man zum Beispiel zwischen wässrigen Kühlschmiermittel und ÖIbasierten Kühlschmiermittel. Während die bekannten wässrigen Kühlschmiermittel in der Regel eine gute Wärmeabfuhr bewirken, ist ihre Schmierwirkung häufig beschränkt. Im Vergleich dazu verfügen die ölbasieren Kühlschmiermittel über eine bessere Schmierwirkung, allerdings führt die geringe Wärmekapazität der Öle zu einer eingeschränkten Kühlwirkung.Different types of cooling lubricants are known from the prior art. For example, a distinction is made between aqueous cooling lubricants and oil-based cooling lubricants. While the known aqueous cooling lubricants generally provide good heat dissipation, their lubricating effect is often limited. In comparison, the oil-based cooling lubricants have a better lubricating effect, but the low heat capacity of the oils leads to a limited cooling effect.
Oftmals werden den Basiskomponenten Öl oder Wasser weitere Komponenten zugesetzt, wie zum Beispiel Schmieradditive oder, insbesondere im Falle von Öl-Wasser-Emulsionen, Emulgatoren. Abhängig von den Additiven oder Hilfsstoffen sind bei solchen Kühlschmiermittel Nachteile wie eine schlechte Hautverträglichkeit, das Auftreten eines unangenehmen Geruchs bis hin zu einer Rauchbildung aufgetreten, was im praktischen Gebrauch zur Belästigung oder sogar zur Gesundheitsgefährdung von Personen führt.Other components are often added to the basic oil or water components, such as lubricating additives or, particularly in the case of oil-water emulsions, emulsifiers. Depending on the additives or auxiliaries, such cooling lubricants have had disadvantages such as poor skin compatibility, the occurrence of an unpleasant odor and even smoke formation, which in practical use leads to annoyance or even to a health hazard to people.
Es ist eine Aufgabe der vorliegenden Erfindung, die Nachteile des Standes der Technik zu überwinden. Insbesondere soll ein Kühlschmiermittel angegeben werden, welches eine gute Wärmeabfuhr beziehungsweise Reibungsverminderung bewirkt und gleichzeitig gut verträglich ist.It is an object of the present invention to overcome the disadvantages of the prior art. In particular, a cooling lubricant is to be specified which brings about good heat dissipation or friction reduction and at the same time is well tolerated.
Diese Aufgabe wird gelöst durch ein Kühlschmiermittel gemäss Anspruch 1. Insbesondere wird ein Kühlschmiermittel für die Wärmeabfuhr und/oder Verminderung der Reibung zwischen einem Werkzeug, insbesondere einem Bohrer, und einem Werkstück, angegeben, wobei das Kühlschmiermittel i) eine wässrige Lösung und ii) ein oder mehrere Polyole und/oder ein oder mehrere Polymere von einem oder mehreren Polyolen umfasst.This object is achieved by a cooling lubricant according to
So hat sich gezeigt, dass bei der Bearbeitung eines Werkstücks mit einem Werkzeug aufweisend das erfindungsgemässe Kühlschmiermittel das Werkzeug auch nach einer längeren Bearbeitung kühl blieb. Da das Werkzeug respektive das Kühlschmiermittel bei einer niedrigen Temperatur verblieb, wurde weder eine Dampfbildung noch eine Geruchsbildung verursacht, was das Kühlschmiermittel für Personen und die Umwelt besonders verträglich macht.It has been shown that when a workpiece is machined with a tool containing the cooling lubricant according to the invention, the tool remains cool even after prolonged machining. Since the tool or cooling lubricant remained at a low temperature, neither vapor formation nor odor formation was caused, which makes the cooling lubricant particularly compatible with people and the environment.
Das Werkstück umfasst vorzugsweise jegliche Baustoffe wie solche, die Stein, Holz, Beton, Gips, Ziegel, Keramik, Metall, Ton, Kunststoff, umfassen. Natürlich sind auch andere Werkstücke denkbar.The workpiece preferably comprises any building material such as stone, wood, concrete, plaster, brick, ceramic, metal, clay, plastic. Of course, other workpieces are also conceivable.
Es gilt hierbei zu verstehen, dass das Kühlschmiermittel nur ein Polyol oder mehrere Polyole umfassen kann. Genauso denkbar ist es, dass das Kühlschmiermittel nur ein Polymer von einem Polyol oder zwei oder mehr Polymere von einem Polyol umfassen kann. Ebenso denkbar ist es, dass das Kühlschmiermittel ein oder mehrere Polyole und ein oder mehrere Polymere von einem Polyol umfassen kann. Im Falle von zwei oder mehr Polyolen beziehungsweise zwei oder mehr Polymeren von einem Polyol handelt es sich vorzugsweise um unterschiedliche Polyole respektive um unterschiedliche Polymere. Wenn nachfolgend der Einfachheit halber auf ein Polyol oder ein Polymer von einem Polyol Bezug genommen wird, so gilt die entsprechende Aussage gleichermassen für den Fall von zwei oder mehr Polyolen oder zwei oder mehr Polymeren von einem Polyol, und umgekehrt.It should be understood here that the cooling lubricant can comprise only one polyol or several polyols. It is just as conceivable that the cooling lubricant can comprise only one polymer from a polyol or two or more polymers from a polyol. It is also conceivable that the cooling lubricant can comprise one or more polyols and one or more polymers of a polyol. In the case of two or more polyols or two or more polymers of one polyol, these are preferably different polyols or different polymers. If, for the sake of simplicity, reference is made below to a polyol or a polymer of a polyol, the corresponding statement applies equally in the case of two or more polyols or two or more polymers of a polyol, and vice versa.
Vorzugsweise liegt das Kühlschmiermittel als Gel vor. Der Ausdruck Gel bezeichnet hierin ein Gel, wie es dem Fachmann bekannt ist. Das heisst, das Kühlschmiermittel ist vorzugsweise ein Halbfeststoff, der im stationären Zustand kein Fliessen zeigt.The cooling lubricant is preferably in the form of a gel. The term gel referred to herein a gel as known to those skilled in the art. That is, the cooling lubricant is preferably a semi-solid that exhibits no flow in the steady state.
Das gelförmige Kühlschmiermittel ist besonders vorteilhaft für Anwendungen unter schwierigen Bedingungen, wie zum Beispiel beim vertikalen Bohren von Löchern in Decken oder beim Bohren in empfindlichen Bereichen wie Schaufenster. Die gelförmige Eigenschaft des Kühlschmiermittels verhindert dabei ein Wegfliessen des Kühlschmiermittels und sorgt stattdessen dafür, dass das Kühlschmiermittel am Werkstück verbleibt.The gel-like cutting fluid is particularly advantageous for applications in difficult conditions, such as drilling vertical holes in ceilings or drilling in sensitive areas such as shop windows. The gel-like property of the cooling lubricant prevents the cooling lubricant from flowing away and instead ensures that the cooling lubricant remains on the workpiece.
Das Kühlschmiermittel umfasst vorzugsweise weiter mindestens einen Rheologiemodifikator.The cooling lubricant preferably further comprises at least one rheology modifier.
Insbesondere umfasst oder ist der Rheologiemodifikator mindestens eine Acrylsäure und/oder ein Polymer einer Acrylsäure und/oder mindestens ein Polysaccharid und/oder mindestens ein Hydrokolloid.In particular, the rheology modifier comprises or is at least one acrylic acid and/or a polymer of an acrylic acid and/or at least one polysaccharide and/or at least one hydrocolloid.
Vorzugsweise umfasst oder ist der Rheologiemodifikator ein Carbomer und/oder Xanthan und/oder Carrageen und/oder ein Galactose-Polymer wie Agar Agar. Carbomere sind hochmolekulare Polymere der Acrylsäure, die mit Polyalkenethern von Zuckern oder Polyalkoholen quer vernetzt sind. Weiter ist der Begriff Carbomer ein internationaler Freiname INN. Ein bevorzugtes Carbomer ist dabei ein Carbopol® 940 Polymer.Preferably, the rheology modifier comprises or is a carbomer and/or xanthan and/or carrageenan and/or a galactose polymer such as agar agar. Carbomers are high molecular weight polymers of acrylic acid that are crosslinked with polyalkene ethers of sugars or polyalcohols. Furthermore, the term carbomer is an international non-proprietary name INN. A preferred carbomer is a Carbopol® 940 polymer.
Beim mindestens einen Rheologiemodifikator handelt es sich also vorzugsweise um mindestens ein Geliermittel und/oder um mindesten ein Verdickungsmittel.The at least one rheology modifier is therefore preferably at least one gelling agent and/or at least one thickener.
Eine Konzentration des Rheologiemodifikators beträgt vorzugsweise zwischen 0.25 % (Gewicht/Volumen) und 4.5 % (Gewicht/Volumen), insbesondere bevorzugt zwischen 0.5 % (Gewicht/Volumen) und 4.0 % (Gewicht/Volumen). Zusätzlich oder alternativ dazu beträgt eine bevorzugte Konzentration des Rheologiemodifikators mindestens 0.25 % (Gewicht/Volumen), insbesondere mindestens 0.5 % (Gewicht/Volumen).A concentration of the rheology modifier is preferably between 0.25% (weight/volume) and 4.5% (weight/volume), particularly preferably between 0.5% (weight/volume) and 4.0% (weight/volume). Additionally or alternatively, a preferred concentration of the rheology modifier is at least 0.25% (weight/volume), in particular at least 0.5% (weight/volume).
Die Konzentrationsangabe des Rheologiemodifikators bezieht sich dabei auf eine Gesamtmenge des Rheologiemodifikators bezüglich einem Gesamtvolumen des Kühlschmiermittels. Die Gesamtmenge des Rheologiemodifikators wird dabei vorzugsweise in Gramm und das Gesamtvolumen wird vorzugsweise in Milliliter angegeben. Wenn nun also beispielsweise ein Kühlschmiermittel bestehend aus 100 Milliliter von einem ersten Polyol, 50 Milliliter von einem zweiten Polyol und 50 Milliliter einer wässrigen Lösung mit 1 Gramm Rheologiemodifikator versetzt wird, so ist die Konzentration des Rheologiemodifikators 0.5 % (Gewicht/Volumen).The specified concentration of the rheology modifier relates to a total quantity of the rheology modifier in relation to a total volume of the cooling lubricant. The total amount of the rheology modifier is preferably in grams and the total volume is preferably in milliliters specified. If, for example, 1 gram of rheology modifier is added to a cooling lubricant consisting of 100 milliliters of a first polyol, 50 milliliters of a second polyol and 50 milliliters of an aqueous solution, the concentration of the rheology modifier is 0.5% (weight/volume).
Das mindestens eine Polyol ist vorzugsweise mindestens ein Dialkohol. Bevorzugte Dialkohole sind dabei Alkandiole.The at least one polyol is preferably at least one dialcohol. Preferred dialcohols are alkanediols.
Bevorzugterweise ist das mindestens eine Polyol Ethylenglykol und/oder Propylenglykol. Das mindestens eine Polyol ist vorzugsweise also mindestens ein Glykol.Preferably, the at least one polyol is ethylene glycol and/or propylene glycol. The at least one polyol is therefore preferably at least one glycol.
Ein denkbares Polymer des Glykols ist Polyglykol. Bevorzugte Polymere von den Polyolen sind somit vorzugsweise Polyethylenglykol und Polypropylenglykol.A conceivable polymer of the glycol is polyglycol. Preferred polymers of the polyols are thus preferably polyethylene glycol and polypropylene glycol.
Das heisst, das mindestens eine Polyol ist vorzugsweise Mono-Ethylenglykol oder Mono-Propylenglykol und Polymere hiervon, vorzugsweise Polyethylenglykol oder Polypropylenglykol. Somit kann das Kühlschmiermittel beispielsweise Mono-Ethylenglykol umfassen, oder das Kühlschmiermittel kann Mono-Propylenglykol umfassen, oder das Kühlschmiermittel kann Polyethylenglykol umfassen, oder das Kühlschmiermittel kann Polypropylenglykol umfassen. Bevorzugt sind dabei insbesondere auch Mischungen davon, z.B. also ein Kühlschmiermittel umfassend Mono-Ethylenglykol und ein oder mehrere Polypropylenglykole, oder ein Kühlschmiermittel umfassend Mono-Propylenglykol und ein oder mehrere Polyethylenglykole, oder ein Kühlschmiermittel umfassend ein oder mehrere Polyethylenglykole und ein oder mehrere Polypropylenglykole.That is, the at least one polyol is preferably mono-ethylene glycol or mono-propylene glycol and polymers thereof, preferably polyethylene glycol or polypropylene glycol. Thus, for example, the cooling lubricant can comprise mono-ethylene glycol, or the cooling lubricant can comprise mono-propylene glycol, or the cooling lubricant can comprise polyethylene glycol, or the cooling lubricant can comprise polypropylene glycol. Mixtures thereof are also particularly preferred, e.g. a cooling lubricant comprising mono-ethylene glycol and one or more polypropylene glycols, or a cooling lubricant comprising mono-propylene glycol and one or more polyethylene glycols, or a cooling lubricant comprising one or more polyethylene glycols and one or more polypropylene glycols.
Wenn ein Gemisch an Polymeren des Polyols vorliegen, haben diese Polymere vorzugsweise im Wesentlichen dieselbe mittlere Molmasse. Besonders bevorzugte Polymere der Polyole sind dabei Polypropylenglykol PPG 400 und Macrogolum 400. Weiter ist es bevorzugt, wenn bei einem Gemisch mehr Ethylen-basiertes Polyol vorliegt als Propylen-basiertes Polyol. Bevorzugt sind dabei Polyol-Gemische umfassend Ethylen-basiertes Polyol und Propylen-basiertes Polyol in einem Verhältnis von 2:1.If a mixture of polymers of the polyol are present, these polymers preferably have essentially the same average molecular weight. Particularly preferred polymers of the polyols are polypropylene glycol PPG 400 and Macrogolum 400. It is also preferred if there is more ethylene-based polyol than propylene-based polyol in a mixture. Polyol mixtures comprising ethylene-based polyol and propylene-based polyol in a ratio of 2:1 are preferred.
Die wässrige Lösung umfasst oder besteht vorzugsweise aus Wasser, insbesondere aus demineralisiertem Wasser.The aqueous solution preferably comprises or consists of water, in particular demineralized water.
Das Kühlschmiermittel kann weiter mindestens eine basische Verbindung umfassen. Die mindestens eine basische Verbindung ist vorzugsweise ein Hydroxid eines Alkalimetalls oder eines Erdalkalimetalls, besonders bevorzugt Natriumhydroxid. Die mindestens eine basische Verbindung liegt dabei vorzugsweise in gelöster Form vor. Insbesondere bevorzugt ist die mindestens eine basische Verbindung in der wässrigen Lösung gelöst.The cooling lubricant can further comprise at least one basic compound. the at least one basic compound is preferably a hydroxide of an alkali metal or an alkaline earth metal, most preferably sodium hydroxide. The at least one basic compound is preferably present in dissolved form. The at least one basic compound is particularly preferably dissolved in the aqueous solution.
Zusätzlich oder alternativ dazu ist der pH-Wert des Kühlschmiermittels vorzugsweise zwischen 5 und 8, insbesondere zwischen 6 und 7.Additionally or alternatively, the pH of the cooling lubricant is preferably between 5 and 8, in particular between 6 and 7.
Eine Dichte des Kühlschmiermittels beträgt vorzugsweise zwischen 0.75 g/cm3 und 1.5 g/cm3, insbesondere zwischen 1.08 g/cm3 und 1.12 g/cm3, und besonders bevorzugt 1.10 g/cm3. Die genannten Dichten wurden jeweils bei einer Temperatur von 24 °C bestimmt. Die Temperatur wurde dabei mit einem Thermometer Bentech GM900 gemessen.A density of the cooling lubricant is preferably between 0.75 g/cm 3 and 1.5 g/cm 3 , in particular between 1.08 g/cm 3 and 1.12 g/cm 3 , and particularly preferably 1.10 g/cm 3 . The densities mentioned were each determined at a temperature of 24.degree. The temperature was measured with a Bentech GM900 thermometer.
Eine Dichte von 1.10 g/cm3 bei einer Temperatur von 24 °C wird beispielsweise erhalten durch 100 Gramm Ethylenglykol, 50 Gramm Propylenglykol, 50 Gramm Wasser, und 4 Gramm Carbopol® 940 Polymer.A density of 1.10 g/cm3 at a temperature of 24°C is obtained, for example, by 100 grams of ethylene glycol, 50 grams of propylene glycol, 50 grams of water, and 4 grams of Carbopol® 940 polymer.
Vorzugsweise umfasst das Kühlschmiermittel Ethylenglykol und Propylenglykol, wobei ein Volumenverhältnis von Ethylenglykol zu Propylenglykol zwischen 10:0.1 bis 0.1:10, vorzugsweise zwischen 5:0.5 bis 0.5:5, und insbesondere bevorzugt zwischen 2:0.75 bis 0.75:2 beträgt.The cooling lubricant preferably comprises ethylene glycol and propylene glycol, with a volume ratio of ethylene glycol to propylene glycol being between 10:0.1 to 0.1:10, preferably between 5:0.5 to 0.5:5 and particularly preferably between 2:0.75 to 0.75:2.
Bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Propylenglykol von 0.75:1, beispielsweise bereitgestellt durch 75 Milliliter Ethylenglykol und 100 Milliliter Propylenglykol. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Propylenglykol von 1:1, beispielsweise bereitgestellt durch 100 Milliliter Ethylenglykol und 100 Milliliter Propylenglykol. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Propylenglykol von 1:0.75, beispielsweise bereitgestellt durch 100 Milliliter Ethylenglykol und 75 Milliliter Propylenglykol. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Propylenglykol von 2:1, beispielsweise bereitgestellt durch 100 Milliliter Ethylenglykol und 50 Milliliter Propylenglykol.A volume ratio of ethylene glycol to propylene glycol of 0.75:1 is preferred, provided for example by 75 milliliters of ethylene glycol and 100 milliliters of propylene glycol. More preferred is a volume ratio of ethylene glycol to propylene glycol of 1:1, provided for example by 100 milliliters of ethylene glycol and 100 milliliters of propylene glycol. More preferred is a volume ratio of ethylene glycol to propylene glycol of 1:0.75, provided for example by 100 milliliters of ethylene glycol and 75 milliliters of propylene glycol. More preferred is a volume ratio of ethylene glycol to propylene glycol of 2:1, provided for example by 100 milliliters of ethylene glycol and 50 milliliters of propylene glycol.
Vorzugsweise umfasst das Kühlschmiermittel Ethylenglykol und Wasser, wobei ein Volumenverhältnis von Ethylenglykol zu Wasser zwischen 2:0.1 bis 1:0.5, vorzugsweise zwischen 1:0.25 zu 1:1 beträgt.The cooling lubricant preferably comprises ethylene glycol and water, with a volume ratio of ethylene glycol to water being between 2:0.1 to 1:0.5, preferably between 1:0.25 to 1:1.
Zusätzlich oder alternativ dazu umfasst das Kühlschmiermittel vorzugsweise Propylenglykol und Wasser, wobei ein Volumenverhältnis von Propylenglykol zu Wasser zwischen 2:0.1 bis 0.5:1, vorzugsweise zwischen 1:0.25 zu 0.75:1 beträgt.In addition or as an alternative to this, the cooling lubricant preferably comprises propylene glycol and water, with a volume ratio of propylene glycol to water being between 2:0.1 to 0.5:1, preferably between 1:0.25 to 0.75:1.
Bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Wasser von 1:1, beispielsweise bereitgestellt durch 100 Milliliter Ethylenglykol und 100 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Wasser von 1:0.75, beispielsweise bereitgestellt durch 100 Milliliter Ethylenglykol und 75 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Wasser von 1:0.5, beispielsweise bereitgestellt durch 100 Milliliter Ethylenglykol und 50 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Wasser von 1:0.25, beispielsweise bereitgestellt durch 100 Milliliter Ethylenglykol und 25 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Wasser von 0.75:0.25, beispielsweise bereitgestellt durch 75 Milliliter Ethylenglykol und 25 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Wasser von 0.75:0.5, beispielsweise bereitgestellt durch 75 Milliliter Ethylenglykol und 50 Milliliter Wasser.A volume ratio of ethylene glycol to water of 1:1 is preferred, for example provided by 100 milliliters of ethylene glycol and 100 milliliters of water. More preferred is a volume ratio of ethylene glycol to water of 1:0.75, provided for example by 100 milliliters of ethylene glycol and 75 milliliters of water. More preferred is a volume ratio of ethylene glycol to water of 1:0.5, provided for example by 100 milliliters of ethylene glycol and 50 milliliters of water. More preferred is a volume ratio of ethylene glycol to water of 1:0.25, provided for example by 100 milliliters of ethylene glycol and 25 milliliters of water. More preferred is a volume ratio of ethylene glycol to water of 0.75:0.25, provided for example by 75 milliliters of ethylene glycol and 25 milliliters of water. More preferred is a volume ratio of ethylene glycol to water of 0.75:0.5, provided for example by 75 milliliters of ethylene glycol and 50 milliliters of water.
Zusätzlich oder alternativ dazu ist ein Volumenverhältnis von Propylenglykol zu Wasser von 1:1, beispielsweise bereitgestellt durch 100 Milliliter Propylenglykol und 100 Milliliter Wasser bevorzugt. Weiter bevorzugt ist ein Volumenverhältnis von Propylenglykol zu Wasser von 1:0.75, beispielsweise bereitgestellt durch 100 Milliliter Propylenglykol und 75 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Propylenglykol zu Wasser von 1:0.5, beispielsweise bereitgestellt durch 100 Milliliter Propylenglykol und 50 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Propylenglykol zu Wasser von 1:0.25, beispielsweise bereitgestellt durch 100 Milliliter Propylenglykol und 25 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Propylenglykol zu Wasser von 0.75:1, beispielsweise bereitgestellt durch 75 Milliliter Propylenglykol und 100 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Propylenglykol zu Wasser von 0.75:0.5, beispielsweise bereitgestellt durch 75 Milliliter Propylenglykol und 50 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Propylenglykol zu Wasser von 0.75:0.25, beispielsweise bereitgestellt durch 75 Milliliter Propylenglykol und 25 Milliliter Wasser.Additionally or alternatively, a volume ratio of propylene glycol to water of 1:1, provided for example by 100 milliliters of propylene glycol and 100 milliliters of water, is preferred. More preferred is a volume ratio of propylene glycol to water of 1:0.75, provided for example by 100 milliliters of propylene glycol and 75 milliliters of water. More preferred is a volume ratio of propylene glycol to water of 1:0.5, provided for example by 100 milliliters of propylene glycol and 50 milliliters of water. More preferred is a volume ratio of propylene glycol to water of 1:0.25, provided for example by 100 milliliters of propylene glycol and 25 milliliters of water. More preferred is a volume ratio of propylene glycol to water of 0.75:1, provided for example by 75 milliliters of propylene glycol and 100 milliliters of water. More preferred is a volume ratio of propylene glycol to water of 0.75:0.5, provided for example by 75 milliliters of propylene glycol and 50 milliliters of water. More preferred is a volume ratio of propylene glycol to water of 0.75:0.25, provided for example by 75 milliliters of propylene glycol and 25 milliliters of water.
Umfasst das Kühlschmiermittel Ethylenglykol, Propylenglykol und Wasser, so ist ein bevorzugtes Volumenverhältnis von Ethylenglykol zu Propylenglykol zu Wasser 1:1:1, beispielsweise bereitgestellt durch 100 Milliliter Ethylenglykol, 100 Milliliter Propylenglykol, und 100 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Propylenglykol zu Wasser 1:1:0.75, beispielsweise bereitgestellt durch 100 Milliliter Ethylenglykol, 100 Milliliter Propylenglykol, und 75 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Propylenglykol zu Wasser 1:1:0.5, beispielsweise bereitgestellt durch 100 Milliliter Ethylenglykol, 100 Milliliter Propylenglykol, und 50 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Propylenglykol zu Wasser 1:1:0.25, beispielsweise bereitgestellt durch 100 Milliliter Ethylenglykol, 100 Milliliter Propylenglykol, und 25 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Propylenglykol zu Wasser 1:0.75:1, beispielsweise bereitgestellt durch 100 Milliliter Ethylenglykol, 75 Milliliter Propylenglykol, und 100 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Propylenglykol zu Wasser 1:0.75:0.75, beispielsweise bereitgestellt durch 100 Milliliter Ethylenglykol, 75 Milliliter Propylenglykol, und 75 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Propylenglykol zu Wasser 1:0.75:0.5, beispielsweise bereitgestellt durch 100 Milliliter Ethylenglykol, 75 Milliliter Propylenglykol, und 50 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Propylenglykol zu Wasser 1:0.75:0.25, beispielsweise bereitgestellt durch 100 Milliliter Ethylenglykol, 75 Milliliter Propylenglykol, und 25 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Propylenglykol zu Wasser 1:0.5:0.25, beispielsweise bereitgestellt durch 100 Milliliter Ethylenglykol, 50 Milliliter Propylenglykol, und 25 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Propylenglykol zu Wasser 1:0.5:0.5, beispielsweise bereitgestellt durch 100 Milliliter Ethylenglykol, 50 Milliliter Propylenglykol, und 50 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Propylenglykol zu Wasser 0.75:1:0.25, beispielsweise bereitgestellt durch 75 Milliliter Ethylenglykol, 100 Milliliter Propylenglykol, und 25 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Propylenglykol zu Wasser 0.75:1:0.5, beispielsweise bereitgestellt durch 75 Milliliter Ethylenglykol, 100 Milliliter Propylenglykol, und 50 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Propylenglykol zu Wasser 0.5:1:0.25, beispielsweise bereitgestellt durch 50 Milliliter Ethylenglykol, 100 Milliliter Propylenglykol, und 25 Milliliter Wasser. Weiter bevorzugt ist ein Volumenverhältnis von Ethylenglykol zu Propylenglykol zu Wasser 0.5:1:0.5, beispielsweise bereitgestellt durch 50 Milliliter Ethylenglykol, 100 Milliliter Propylenglykol, und 50 Milliliter Wasser.If the cooling lubricant comprises ethylene glycol, propylene glycol and water, a preferred volume ratio of ethylene glycol to propylene glycol to water is 1:1:1, provided for example by 100 milliliters of ethylene glycol, 100 milliliters of propylene glycol, and 100 milliliters of water. A volume ratio of ethylene glycol to propylene glycol to water of 1:1:0.75 is more preferred, for example provided by 100 milliliters of ethylene glycol, 100 milliliters of propylene glycol, and 75 milliliters of water. A volume ratio of ethylene glycol to propylene glycol to water of 1:1:0.5 is more preferred, for example provided by 100 milliliters of ethylene glycol, 100 milliliters of propylene glycol, and 50 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 1:1:0.25, provided for example by 100 milliliters of ethylene glycol, 100 milliliters of propylene glycol, and 25 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 1:0.75:1, provided for example by 100 milliliters of ethylene glycol, 75 milliliters of propylene glycol, and 100 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 1:0.75:0.75, provided for example by 100 milliliters of ethylene glycol, 75 milliliters of propylene glycol, and 75 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 1:0.75:0.5, provided for example by 100 milliliters of ethylene glycol, 75 milliliters of propylene glycol, and 50 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 1:0.75:0.25, provided for example by 100 milliliters of ethylene glycol, 75 milliliters of propylene glycol, and 25 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 1:0.5:0.25, provided for example by 100 milliliters of ethylene glycol, 50 milliliters of propylene glycol, and 25 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 1:0.5:0.5, provided for example by 100 milliliters of ethylene glycol, 50 milliliters of propylene glycol, and 50 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 0.75:1:0.25, for example provided by 75 milliliters of ethylene glycol, 100 milliliters of propylene glycol, and 25 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 0.75:1:0.5, for example provided by 75 milliliters of ethylene glycol, 100 milliliters of propylene glycol, and 50 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 0.5:1:0.25, provided for example by 50 milliliters of ethylene glycol, 100 milliliters of propylene glycol, and 25 milliliters of water. More preferred is a volume ratio of ethylene glycol to propylene glycol to water of 0.5:1:0.5, provided for example by 50 milliliters of ethylene glycol, 100 milliliters of propylene glycol, and 50 milliliters of water.
In einem weiteren Aspekt wird die Verwendung eines Kühlschmiermittels wie oben beschrieben für die Wärmeabfuhr und/oder Verminderung der Reibung zwischen einem Werkzeug, insbesondere einem Bohrer, und einem Werkstück, angegeben.In a further aspect, the use of a cooling lubricant as described above for heat dissipation and / or reducing friction between a Tool, in particular a drill, and a workpiece specified.
Vorzugsweise wird das Kühlschmiermittel unmittelbar vor der Bearbeitung des Werkstücks auf das Werkzeug aufgebracht. Das Aufbringen kann vom Anwender selbst vorgenommen werden, beispielsweise indem er mit seinen Fingern oder mittels eines Hilfsmittels wie eines Spachtels eine Dosis des Kühlschmiermittels auf das Werkzeug transferiert. Die Dosis des Kühlschmiermittels ist abhängig von der Grösse beziehungsweise vom Durchmesser des Werkzeugs. Im Falle eines typischen Bohrers zum Beispiel wurden sehr gute Ergebnisse mit einer Dosis von bereits etwa 0.1 Gramm Kühlschmiermittel oder mehr, insbesondere mit 0.15 Gramm, 0.2 Gramm, und 0.35 Gramm Kühlschmiermittel, erhalten. Natürlich können auch deutlich grössere Dosen verwendet werden. Weiter ist es bevorzugt, während dem Bearbeitungsverfahren die Zugabe von Kühlschmiermittel zu wiederholen, also während zwei oder mehreren Malen weitere Dosen des Kühlschmiermittels auf das Werkzeug aufzubringen.The cooling lubricant is preferably applied to the tool immediately before the workpiece is machined. The application can be carried out by the user himself, for example by transferring a dose of the cooling lubricant to the tool with his fingers or with an aid such as a spatula. The dose of cooling lubricant depends on the size or diameter of the tool. In the case of a typical drill, for example, very good results have been obtained with a dose of as little as about 0.1 gram of coolant or more, particularly with 0.15 grams, 0.2 grams, and 0.35 grams of coolant. Of course, much larger doses can also be used. Furthermore, it is preferred to repeat the addition of cooling lubricant during the machining process, ie to apply additional doses of cooling lubricant to the tool two or more times.
In einem weiteren Aspekt wird ein Verfahren zur Herstellung eines Kühlschmiermittels für die Wärmeabfuhr und/oder Verminderung der Reibung zwischen einem Werkzeug und einem Werkstück angegeben. Insbesondere wird ein Verfahren zur Herstellung eines Kühlschmiermittels wie oben beschrieben angegeben. Das Verfahren umfasst dabei den Schritt von Bereitstellen einer wässrigen Lösung und einem oder mehreren Polyolen und/oder einem oder mehreren Polymeren von einem oder mehreren Polyolen, wobei das Kühlschmiermittel insbesondere als Gel vorliegt.In a further aspect, a method for producing a cooling lubricant for dissipating heat and/or reducing friction between a tool and a workpiece is specified. In particular, a method for producing a cooling lubricant as described above is specified. The method comprises the step of providing an aqueous solution and one or more polyols and/or one or more polymers of one or more polyols, with the cooling lubricant being present in particular as a gel.
Vorzugsweise wird dabei in einem Schritt (i) mindestens ein erstes Polyol, insbesondere ein Dialkohol, besonders bevorzugt Propylenglykol, der wässrigen Lösung zugegeben. In einem weiteren Schritt (ii) wird vorzugsweise mindestens ein zweites Polyol, insbesondere ein Dialkohol, besonders bevorzugt Ethylenglykol, der wässrigen Lösung zugegeben. Weiter ist es bevorzugt, wenn zwischen dem Schritt (i) und dem weiteren Schritt (ii) mindestens ein Rheologiemodifikator der wässrigen Lösung zugegeben wird.At least one first polyol, in particular a dialcohol, particularly preferably propylene glycol, is preferably added to the aqueous solution in a step (i). In a further step (ii), preferably at least one second polyol, in particular a dialcohol, particularly preferably ethylene glycol, is added to the aqueous solution. It is also preferred if at least one rheology modifier is added to the aqueous solution between step (i) and the further step (ii).
Die Schritte (i) und (ii) werden also vorzugsweise nacheinander ausgeführt. Das heisst, es ist bevorzugt zunächst das erste Polyol der wässrigen Lösung zuzugeben, wobei ein erstes Gemisch erzeugt wird. Um eine bessere Durchmischung der beiden Komponenten zu erhalten, kann das erste Gemisch mit einer Rührvorrichtung wie einem Mixer gerührt werden. Alsdann kann das zweite Polyol dem ersten Gemisch zugegen werden, wobei ein zweites Gemisch umfassend die wässrige Lösung, das erste Polyol und das zweite Polyol erzeugt wird.Steps (i) and (ii) are thus preferably carried out in succession. This means that it is preferable to first add the first polyol to the aqueous solution, with a first mixture being produced. In order to obtain better mixing of the two components, the first mixture can be stirred with a stirring device such as a mixer. The second polyol can then be added to the first mixture, with a second mixture comprising the aqueous solution, the first polyol and the second polyol is produced.
Hierbei ist es allerdings denkbar, dass dem ersten Gemisch vor der Zugabe des zweiten Polyols ein Rheologiemodifikator, beispielsweise ein Verdickungsmittel und/oder Geliermittel zugegeben wird. In diesem Fall würde also ein zweites Gemisch umfassend die wässrige Lösung, das erste Polyol, und den Rheologiemodifikator erzeugt werden. Dieses zweite Gemisch kann ebenfalls mit einer Rührvorrichtung durchmischt werden. Alsdann kann das zweite Polyol dem zweiten Gemisch zugegeben werden, wobei ein drittes Gemisch umfassend das erste Polyol, den Rheologiemodifikator, und das zweite Poylol erzeugt werden. Genauso ist es allerdings denkbar, den Rheologiemodifikator einem Gemisch umfassend das erste Polyol und das zweite Polyol zuzugeben.However, it is conceivable here that a rheology modifier, for example a thickener and/or gelling agent, is added to the first mixture before the addition of the second polyol. In this case, a second mixture comprising the aqueous solution, the first polyol, and the rheology modifier would thus be produced. This second mixture can also be mixed with a stirring device. The second polyol can then be added to the second mixture, creating a third mixture comprising the first polyol, the rheology modifier, and the second polyol. However, it is just as conceivable to add the rheology modifier to a mixture comprising the first polyol and the second polyol.
Weiter ist es denkbar, dass zwischen zwei oder mehreren dieser Schritte eine basische Verbindung wie beispielsweise eine Natriumhydroxid-Lösung, der wässrigen Lösung zugegeben wird. Beispielsweise könnte zunächst die wässrige Lösung bereitgestellt werden. Alsdann könnte das erste Polyol der wässrigen Lösung zugegeben werden. Alsdann könnte der Rheologiemodifikator der wässrigen Lösung umfassend das erste Polyol zugegeben werden. Alsdann könnte die basische Verbindung der wässrigen Lösung umfassend das erste Polyol und den Rheologiemodifikator zugegeben werden. Alsdann könnte das zweite Polyol der wässrigen Lösung umfassend das erste Polyol, den Rheologiemodifikator, und die basische Verbindung zugegeben werden. Alsdann könnte wiederum eine basische Verbindung der wässrigen Lösung umfassend das erste Polyol, den Rheologiemodifikator, die basische Verbindung aus dem vorherigen Schritt, und das zweite Polyol zugegeben werden.It is also conceivable that between two or more of these steps a basic compound such as a sodium hydroxide solution is added to the aqueous solution. For example, the aqueous solution could be provided first. Then the first polyol could be added to the aqueous solution. The rheology modifier could then be added to the aqueous solution comprising the first polyol. The basic compound could then be added to the aqueous solution comprising the first polyol and the rheology modifier. The second polyol could then be added to the aqueous solution comprising the first polyol, the rheology modifier, and the basic compound. A basic compound could then again be added to the aqueous solution comprising the first polyol, the rheology modifier, the basic compound from the previous step, and the second polyol.
Bevorzugte Ausführungsformen der Erfindung werden im Folgenden anhand der Zeichnungen beschrieben, die lediglich zur Erläuterung dienen und nicht einschränkend auszulegen sind. In den Zeichnungen zeigen:
- Fig. 1
- zeigt eine Bildaufnahme von einem erfindungsgemässen Kühlschmiermittel;
- Fig. 2
- zeigt eine Bildaufnahme von einer Dosis des Kühlschmiermittels auf einer Bohrspitze im Ruhezustand;
- Fig. 3
- zeigt eine Bildaufnahme von einer Dosis des Kühlschmiermittels auf einer sich drehenden Bohrspitze;
- Fig. 4
- zeigt ein Diagramm, welches den zeitlichen Temperaturverlauf einer Bohrspitze während einem Bohrvorgang für verschiedene Kühlschmiermittel darstellt;
- Fig. 5
- zeigt ein Diagramm, welches benötigte Zeiten für das Durchbohren von Werkstücken unterschiedlicher Dicke mit einer Bohrspitze aufweisend verschiedene Kühlschmiermittel darstellt;
- Fig. 6a
- zeigt ein Diagramm, welches den zeitlichen Temperaturverlauf einer Bohrspitze während einem Bohrvorgang für weitere verschiedene Kühlschmiermittel darstellt;
- Fig. 6b
- zeigt ein Diagramm, welches benötigte Zeiten für das Durchbohren von Werkstücken unterschiedlicher Dicke mit einer Bohrspitze aufweisend die verschiedenen Kühlschmiermittel gemäss
Fig. 6a darstellt; - Fig. 7a
- zeigt ein Diagramm, welches den zeitlichen Temperaturverlauf einer Bohrspitze während einem Bohrvorgang für weitere verschiedene Kühlschmiermittel darstellt;
- Fig. 7b
- zeigt ein Diagramm, welches benötigte Zeiten für das Durchbohren von Werkstücken unterschiedlicher Dicke mit einer Bohrspitze aufweisend die verschiedenen Kühlschmiermittel gemäss
Fig. 7a darstellt; - Fig. 8a
- zeigt ein Diagramm, welches den zeitlichen Temperaturverlauf einer Bohrspitze während einem Bohrvorgang für weitere verschiedene Kühlschmiermittel darstellt;
- Fig. 8b
- zeigt ein Diagramm, welches benötigte Zeiten für das Durchbohren von Werkstücken unterschiedlicher Dicke mit einer Bohrspitze aufweisend die verschiedenen Kühlschmiermittel gemäss
Fig. 8a darstellt; - Fig. 9a
- zeigt ein Diagramm, welches den zeitlichen Temperaturverlauf einer Bohrspitze während einem Bohrvorgang für weitere verschiedene Kühlschmiermittel darstellt;
- Fig. 9b
- zeigt ein Diagramm, welches benötigte Zeiten für das Durchbohren von Werkstücken unterschiedlicher Dicke mit einer Bohrspitze aufweisend die verschiedenen Kühlschmiermittel gemäss
Fig. 9a darstellt.
- 1
- shows an image of a cooling lubricant according to the invention;
- 2
- Figure 12 shows an image of a dose of cooling lubricant on a drill bit at rest;
- 3
- Figure 12 shows an image capture of a dose of cutting fluid on a rotating drill bit;
- 4
- shows a diagram which shows the time course of the temperature of a drill bit during a drilling process for different cooling lubricants;
- figure 5
- shows a diagram which represents the times required for drilling through workpieces of different thicknesses with a drill bit having different cooling lubricants;
- Figure 6a
- shows a diagram which shows the temperature profile of a drill bit over time during a drilling process for other different cooling lubricants;
- Figure 6b
- shows a diagram showing the times required for drilling through workpieces of different thicknesses with a drill bit using the various cooling lubricants according to
Figure 6a represents; - Figure 7a
- shows a diagram which shows the temperature profile of a drill bit over time during a drilling process for other different cooling lubricants;
- Figure 7b
- shows a diagram showing the times required for drilling through workpieces of different thicknesses with a drill bit using the various cooling lubricants according to
Figure 7a represents; - Figure 8a
- shows a diagram which shows the temperature profile of a drill bit over time during a drilling process for other different cooling lubricants;
- Figure 8b
- shows a diagram showing the times required for drilling through workpieces of different thicknesses with a drill bit using the various cooling lubricants according to
Figure 8a represents; - Figure 9a
- shows a diagram which shows the temperature profile of a drill bit over time during a drilling process for other different cooling lubricants;
- Figure 9b
- shows a diagram showing the times required for drilling through workpieces of different thicknesses with a drill bit using the various cooling lubricants according to
Figure 9a represents.
Anhand der
Die
Bei dem in diesen Figuren gezeigten Kühlschmiermittel 1 handelt es sich um ein Kühlschmiermittel umfassend 100 ml Mono-Ethylenglykol, 50 ml Mono-Propylenglykol, 50 ml Wasser, und 4 Gramm des Carbomers Carpopol 940 aufweisend die CAS Nummer 9007-20-9. Wie gut aus den
Anhang der Diagramme der
Beim zweiten getesteten Kühlschmiermittel b) handelt es sich um ein Kühlschmiermittel umfassend 100 Milliliter Mono-Ethylenglykol und 50 Milliliter Mono-Propylenglykol.The second cooling lubricant b) tested is a cooling lubricant comprising 100 milliliters of mono-ethylene glycol and 50 milliliters of mono-propylene glycol.
Beim dritten getesteten Kühlschmiermittel c) handelt es sich um ein erfindungsgemässes Kühlschmiermittel umfassend 100 Milliliter Mono-Ethylenglykol, 50 Milliliter Mono-Propylenglykol, und 50 Milliliter Wasser.The third cooling lubricant c) tested is a cooling lubricant according to the invention comprising 100 milliliters of monoethylene glycol, 50 milliliters of monopropylene glycol and 50 milliliters of water.
Beim vierten getesteten Kühlschmiermittel d) handelt es sich um ein weiteres erfindungsgemässes Kühlschmiermittel umfassend 100 Milliliter Mono-Ethylenglykol, 50 Milliliter Mono-Propylenglykol, 50 Milliliter demineralisiertes Wasser, und 4 Gramm Carbopol 940.The fourth cooling lubricant d) tested is another cooling lubricant according to the invention comprising 100 milliliters of monoethylene glycol, 50 milliliters of monopropylene glycol, 50 milliliters of demineralized water and 4 grams Carbopol 940.
Beim fünften getesteten Kühlschmiermittel e) handelt es sich um ein weiteres erfindungsgemässes Kühlschmiermittel umfassend 100 Milliliter Mono-Ethylenglykol, 50 Milliliter Mono-Propylenglykol, 50 Milliliter Wasser, und 1 Gramm Carbopol 940.The fifth cooling lubricant e) tested is another cooling lubricant according to the invention comprising 100 milliliters of mono-ethylene glycol, 50 milliliters of mono-propylene glycol, 50 milliliters of water and 1 gram of Carbopol 940.
Bei den in
Die gute Wärmeabfuhr und Reibungsverminderung der erfindungsgemässen Kühlschmiermittel geht auch aus dem in
Wie aus dem Diagramm hervorgeht, benötigt das Kühlschmiermittel b) die kürzeste Zeit für die Durchbohrung. Beispielsweise ist eine 10 Millimeter dicke Eisenplatte nach 29 Sekunden, eine 30 Millimeter dicke Eisenplatte nach 58 Sekunden, und eine 30 Millimeter Eisenplatte nach 87 Sekunden durchbohrt. Für das erfindungsgemässe Kühlschmiermittel c) findet sich ein ähnlicher Zeitverlauf. So ist eine 10 Millimeter dicke Eisenplatte nach 30 Sekunden, eine 30 Millimeter dicke Eisenplatte nach 60 Sekunden, und eine 30 Millimeter Eisenplatte nach 90 Sekunden durchbohrt. Während diese beiden Kühlschmiermittel zwar die schnellste Durchbohrung gestatten, führen sie allerdings zu einer höheren Temperatur der Bohrspitze, siehe Diskussionen im Zusammenhang mit
Den tiefsten Temperaturverlauf und eine gegenüber dem kommerziellen Kühlschmiermittel a) schnelle Bohrzeit liess sich für das erfindungsgemässe Kühlschmiermittel e) feststellen. Beispielsweise ist eine 10 Millimeter dicke Eisenplatte nach 32 Sekunden, eine 20 Millimeter dicke Eisenplatte nach 64 Sekunden, und eine 30 Millimeter dicke Eisenplatte nach etwa 96 Sekunden durchbohrt. Mit dem erfindungsgemässen Kühlschmiermittel d) wird für diese Dicken leicht mehr Zeit benötigt, nämlich etwa 34 Sekunden im Falle der 10 Millimeter dicken Eisenplatte, etwa 68 Sekunden im Falle der 20 Millimeter dicken Eisenplatte, und etwa 102 Sekunden im Falle der 30 Millimeter dicken Eisenplatte. Deutliche längere Zeiten hingegen fallen für den kommerziell erhältlichen Bohr- und Schneidöl-Spray WD-40, hier Kühlschmiermittel a), an. So benötigt das Durchbohren einer 10 Millimeter dicken Eisenplatte etwa 46 Sekunden, das Durchbohren einer 20 Millimeter dicken Eisenplatte etwa 92 Sekunden, und das Durchbohren einer 30 Millimeter dicken Eisenplatte etwa 138 Sekunden.The lowest temperature curve and a faster drilling time than the commercial cooling lubricant a) could be determined for the cooling lubricant e) according to the invention. For example, a 10 mm thick iron plate is pierced after 32 seconds, a 20 mm thick iron plate after 64 seconds, and a 30 mm thick iron plate after about 96 seconds. With the cooling lubricant d) according to the invention, slightly more time is required for these thicknesses, namely about 34 seconds in the case of the 10 millimeter thick iron plate, about 68 seconds in the case of the 20 millimeter thick iron plate, and about 102 seconds in the case of the 30 millimeter thick iron plate. On the other hand, the commercially available drilling and cutting oil spray WD-40, here cooling lubricant a), requires significantly longer times. For example, it takes about 46 seconds to pierce a 10 millimeter thick iron plate, about 92 seconds to pierce a 20 millimeter thick iron plate, and about 138 seconds to pierce a 30 millimeter thick iron plate.
Anhand der Diagramme der
Bei den Kühlschmiermittel in den
Bei den Kühlschmiermittel in den
Bei den Kühlschmiermittel in den
Bei den Kühlschmiermittel in den
Wie gut aus einem Vergleich dieser Figuren hervorgeht, gestatten die erfindungsgemässen Kühlschmiermittel gezeigt in den
Etwas bessere Ergebnisse liessen sich für die Kühlschmiermittel gemäss den
Die besten Ergebnisse liessen sich allerdings für die in den
In den hier gezeigten Versuchen wurden die Temperaturen jeweils mit dem Thermometer Bentech GM900 gemessen.
Claims (11)
wobei eine Konzentration des Rheologiemodifikators mindestens 0.25 % (Gewicht/Volumen), insbesondere mindestens 0.5 % (Gewicht/Volumen) beträgt.Use of the cooling lubricant (1) according to claim 2 or 3, wherein a concentration of the rheology modifier between 0.25% (weight/volume) and 4.5% (weight/volume), in particular between 0.5% (weight/volume) and 4.0% (weight/volume ) is, and/or
wherein a concentration of the rheology modifier is at least 0.25% (weight/volume), in particular at least 0.5% (weight/volume).
wobei der pH-Wert des Kühlschmiermittels (1) zwischen 5 und 8, insbesondere zwischen 6 und 7 ist.Use of the cooling lubricant (1) according to one of the preceding claims, further comprising at least one basic compound, in particular a hydroxide of an alkali metal or an alkaline earth metal, particularly preferably sodium hydroxide, and/or
wherein the pH of the cooling lubricant (1) is between 5 and 8, in particular between 6 and 7.
weiter umfassend Propylenglykol und Wasser, wobei ein Volumenverhältnis von Propylenglykol zu Wasser zwischen 2:0.1 bis 0.5:1, vorzugsweise zwischen 1:0.25 zu 0.75:1 beträgt.Use of the cooling lubricant (1) according to one of the preceding claims, comprising ethylene glycol and water, a volume ratio of ethylene glycol to water being between 2:0.1 to 1:0.5, preferably between 1:0.25 to 1:1; and or
further comprising propylene glycol and water, wherein a volume ratio of propylene glycol to water is between 2:0.1 to 0.5:1, preferably between 1:0.25 to 0.75:1.
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2021
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DE2043885A1 (en) * | 1970-06-18 | 1972-03-09 | R.W. Moll & Co, 4330 Mülheim-Styrum | Synthetic lubricants for cutting and non-cutting metalworking |
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MELINDER AKE: "Thermophysical properties of aqueous solutions used as secondary working fluids", 1 January 2007 (2007-01-01), Stockholm, pages 1 - 144, XP055779723, ISBN: 978-91-7-178707-1, Retrieved from the Internet <URL:http://www.diva-portal.org/smash/get/diva2:12169/FULLTEXT01.pdf> [retrieved on 20210225] * |
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