EP0279098A2 - Method of cooling and lubricating work pieces during grinding and severe machining operations by means of cubic boron nitride - Google Patents

Method of cooling and lubricating work pieces during grinding and severe machining operations by means of cubic boron nitride Download PDF

Info

Publication number
EP0279098A2
EP0279098A2 EP87305006A EP87305006A EP0279098A2 EP 0279098 A2 EP0279098 A2 EP 0279098A2 EP 87305006 A EP87305006 A EP 87305006A EP 87305006 A EP87305006 A EP 87305006A EP 0279098 A2 EP0279098 A2 EP 0279098A2
Authority
EP
European Patent Office
Prior art keywords
boron nitride
cubic boron
work pieces
machining operations
cooling
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.)
Withdrawn
Application number
EP87305006A
Other languages
German (de)
French (fr)
Other versions
EP0279098A3 (en
Inventor
Thomas F. Twining
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Master Chemical Corp
Original Assignee
Master Chemical Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Master Chemical Corp filed Critical Master Chemical Corp
Publication of EP0279098A2 publication Critical patent/EP0279098A2/en
Publication of EP0279098A3 publication Critical patent/EP0279098A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
    • C10M107/20—Lubricating compositions characterised by the base-material being a macromolecular compound containing oxygen
    • C10M107/30—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M107/32—Condensation polymers of aldehydes or ketones; Polyesters; Polyethers
    • C10M107/34—Polyoxyalkylenes
    • 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
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/02—Water
    • 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
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/063—Peroxides
    • 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
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
    • 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
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/105—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing three carbon atoms only
    • 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
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/107—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of two or more specified different alkylene oxides covered by groups C10M2209/104 - C10M2209/106
    • 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
    • C10M2211/00—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2211/02—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions containing carbon, hydrogen and halogen only
    • C10M2211/022—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions containing carbon, hydrogen and halogen only aliphatic
    • 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
    • C10M2211/00—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2211/06—Perfluorinated compounds
    • 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
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2215/042—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Alkoxylated derivatives thereof
    • 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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/02—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
    • 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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/02—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
    • C10M2219/024—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds of esters, e.g. fats
    • 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
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • 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
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C10M2223/042—Metal salts thereof
    • 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
    • C10M2225/00—Organic macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • 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
    • C10M2225/00—Organic macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2225/02—Macromolecular compounds from phosphorus-containg monomers, obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • 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
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/02—Groups 1 or 11
    • 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
    • C10N2040/10—Running-in-oil ; Grinding
    • 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

Definitions

  • the invention relates to a method of cooling and lubricating work pieces during grinding and severe machining operations by means of cubic boron nitride.
  • Cubic boron nitride is used as an abrasive in grinding wheels in place of commonly used aluminum oxide. Its advantage over aluminum oxide is that it does not wear down and become blunt like aluminum oxide. Thus surfaces which have been ground with cubic boron nitride are left in a state of compression. In contract, surfaces which have been ground with aluminum oxide are left under tension and therefore are more susceptible to stress corrosion cracking.
  • Cutting tool tips made of cubic boron nitride also have the advantage that they stay sharp even during severe machining operations.
  • cubic boron nitride is superior to diamond for machining exotic alloys which commonly contain metals of group XIII of the periodic table, because cubic boron nitride does not appreciably react with such metals as diamond does.
  • Cubic boron nitride is made by subjecting hexagonal boron nitride to pressures of about 750,000 pounds per square inch and temperatures from 1700 to 1800 degrees C.
  • cubic boron nitride is of great potential value for use as an abrasive in a grinding wheel or as a cutting tip in a cutting tool.
  • cubic boron nitride as an abrasive or a cutting tip lies in its ability to remain sharp during high speed grinding and severe machining operations are highly advantageous because they enable the output of a plant to be increased with no addition to machinery or manpower.
  • the coolants heretofore used for conducting away heat during grinding or machining operations are not suitable for use in high speed grinding or machining operations by means of cubic boron nitride.
  • Hydrocarbon oils are not suitable because of insufficient cooling ability, fire hazard, smoke or mist generation and difficulty of removal from the finished work piece.
  • Aqueous coolants are not suitable because water tends to react with cubic boron nitride at the high pressure and temperature prevailing at the point of contact of the cubic boron nitride with the work piece and because of rapid evaporation of water, tendency to foam and low lubricity.
  • This object is achieved in the practice of the invention by cooling and lubricating work pieces, during grinding and machining operations by means of cubic boron nitride, by supplying to each work piece, as a coolant and lubricant, a copolymer of an alkylene oxide having from 2 to 3 carbon atoms with an alkylene glycol having from 2 to 3 carbon atoms, said copolymer having an average molecular weight from 190 to 400, and having a flash point over 340 degrees F.
  • Said copolymer when so used as a coolant, has the following advantages:
  • copolymers including block copolymers, of ethylene oxide or propylene oxide with ethylene glycol or propylene glycol are known materials, prepared by reaction of ethylene or propylene oxide with the glycol.
  • the copolymer used in the practice of the invention has an average molecular weight from 190 to 400, preferably from 240 to 315. Its flash point is over 340 degrees F as tested by ASTM Method D93, using a Pensky-­Martens closed cup.
  • a typical general formula of the copolymer is HOCH2 (CH2 OCH2 ) n CH2 OH.
  • n The average value of n varies with the molecular weight.
  • the material actually used in the practice of the invention is a mixture of copolymers, and may contain block copolymers of ethylene oxide or propylene oxide with both ethylene glycol and propylene glycol.
  • the phosphate ester may have a phosphorus content of 1 to 10% by weight.
  • a suitable phosphate ester may be prepared by reacting phosphorus pentoxide, polyphosphoric acid or phosphorus oxychloride with a mid-range nonionic surfactant such as oleyl alcohol ethoxylate.
  • the chlorinated hydrocarbon may have an average carbon chain length of C12 to C24 and a chlorine content of 10 to 70%.
  • the sulfurized fat, oil or ester may have a sulfur content of 1 to 20%, and may be prepared by adding molten sulfur to an unsaturated fatty acid such as oleic acid or an ester thereof, and holding at about 280 degrees F for one to two hours.
  • the general formula for the coolant is as follows: Copolymer 80 to 90% Phosphate ester 0 to 10% Sulfurized material 0 to 5% Chlorinated hydrocarbon 0 to 5%
  • an alkaline substance such as sodium hydroxide, potassium hydroxide or an alkanolamine should be added. A pH below 7.0 would tend to cause corrosion.
  • the resulting fluid was then used as the coolant in 13 successive high speed grinding operations in which a 5 inch diameter grinding wheel was driven at 6574 rpm.
  • the workpiece was of 52100 (Rc60) steel and was 4 inches in diameter at the beginning of the first grinding operation. In each of the grinding operations the workpiece was driven at 215 rpm and the diameter of the workpiece was reduced by 0.100 inch.
  • the abrasive in the grinding wheel was cubic boron nitride.
  • the power consumed during the cutting operations was substantially less than the power consumed during each of the three tests, showing that the cutting fluid used in the first test had superior lubricity.
  • the lower power consumption in the first test meant that there was less heat generation.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
  • Ceramic Products (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Abstract

A method of cooling and lubricating work pieces during grinding and severe machining operations by means of cubic boron nitride comprises the step of supplying to the work pieces, as a coolant and lubricant, a copolymer of an alkylene oxide having from 2 to 3 carbon atoms with an alkylene glycol having from 2 to 3 carbon atoms, having an average molecular weight from 190 to 400, and having a flash point over 340 degrees F.

Description

  • The invention relates to a method of cooling and lubricating work pieces during grinding and severe machining operations by means of cubic boron nitride.
  • Cubic boron nitride is used as an abrasive in grinding wheels in place of commonly used aluminum oxide. Its advantage over aluminum oxide is that it does not wear down and become blunt like aluminum oxide. Thus surfaces which have been ground with cubic boron nitride are left in a state of compression. In contract, surfaces which have been ground with aluminum oxide are left under tension and therefore are more susceptible to stress corrosion cracking.
  • Cutting tool tips made of cubic boron nitride also have the advantage that they stay sharp even during severe machining operations.
  • Both the hardness and durability of cubic boron nitride approach that of diamond. However, cubic boron nitride is superior to diamond for machining exotic alloys which commonly contain metals of group XIII of the periodic table, because cubic boron nitride does not appreciably react with such metals as diamond does.
  • Cubic boron nitride is made by subjecting hexagonal boron nitride to pressures of about 750,000 pounds per square inch and temperatures from 1700 to 1800 degrees C.
  • Reference is made to U.S. patents 4590034 and 4619698 for procedures for making cubic boron nitride and making cutting tools having tips made of cubic boron nitride.
  • For reasons hereinbefore described, cubic boron nitride is of great potential value for use as an abrasive in a grinding wheel or as a cutting tip in a cutting tool.
  • The potential value of cubic boron nitride as an abrasive or a cutting tip lies in its ability to remain sharp during high speed grinding and severe machining operations are highly advantageous because they enable the output of a plant to be increased with no addition to machinery or manpower.
  • The limitation on the use of cubic boron nitride abrasive or cutting tips in high speed grinding or machining operations has been the inability to conduct away the increased amount of heat, when not conducted away, raises the temperature of the work piece so as to damage the work piece, or to cause the work piece to expand so that its dimensions are not held.
  • The coolants heretofore used for conducting away heat during grinding or machining operations are not suitable for use in high speed grinding or machining operations by means of cubic boron nitride.
  • Hydrocarbon oils are not suitable because of insufficient cooling ability, fire hazard, smoke or mist generation and difficulty of removal from the finished work piece.
  • Aqueous coolants are not suitable because water tends to react with cubic boron nitride at the high pressure and temperature prevailing at the point of contact of the cubic boron nitride with the work piece and because of rapid evaporation of water, tendency to foam and low lubricity.
  • It is an object of the invention to obviate the existing limitation on the use of cubic boron nitride abrasives or cutting tips in high speed grinding or machining operations.
  • This object is achieved in the practice of the invention by cooling and lubricating work pieces, during grinding and machining operations by means of cubic boron nitride, by supplying to each work piece, as a coolant and lubricant, a copolymer of an alkylene oxide having from 2 to 3 carbon atoms with an alkylene glycol having from 2 to 3 carbon atoms, said copolymer having an average molecular weight from 190 to 400, and having a flash point over 340 degrees F.
  • Said copolymer, when so used as a coolant, has the following advantages:
    • 1. It has high lubricity.
    • 2. It has a relatively low fire hazard.
    • 3. It does not smoke.
    • 4. It can be used in a substantially anhydrous condition, but is miscible with water and therefore is easily washed off the finished work piece.
  • The copolymers, including block copolymers, of ethylene oxide or propylene oxide with ethylene glycol or propylene glycol are known materials, prepared by reaction of ethylene or propylene oxide with the glycol.
  • The copolymer used in the practice of the invention has an average molecular weight from 190 to 400, preferably from 240 to 315. Its flash point is over 340 degrees F as tested by ASTM Method D93, using a Pensky-­Martens closed cup.
  • A typical general formula of the copolymer is HOCH₂ (CH₂ OCH₂ )n CH₂ OH.
  • The average value of n varies with the molecular weight.
  • The material actually used in the practice of the invention is a mixture of copolymers, and may contain block copolymers of ethylene oxide or propylene oxide with both ethylene glycol and propylene glycol.
  • In order to increase the resistance of the coolant to high pressures, it is desirable to incorporate one or more of the known extreme pressure additives such as a phosphate ester, a chlorinated hydrocarbon or a sulfurized fat, oil or ester.
  • The phosphate ester may have a phosphorus content of 1 to 10% by weight.
  • A suitable phosphate ester may be prepared by reacting phosphorus pentoxide, polyphosphoric acid or phosphorus oxychloride with a mid-range nonionic surfactant such as oleyl alcohol ethoxylate.
  • The chlorinated hydrocarbon may have an average carbon chain length of C12 to C24 and a chlorine content of 10 to 70%.
  • The sulfurized fat, oil or ester may have a sulfur content of 1 to 20%, and may be prepared by adding molten sulfur to an unsaturated fatty acid such as oleic acid or an ester thereof, and holding at about 280 degrees F for one to two hours.
  • The general formula for the coolant is as follows:
    Copolymer 80 to 90%
    Phosphate ester 0 to 10%
    Sulfurized material 0 to 5%
    Chlorinated hydrocarbon 0 to 5%
  • If necessary to bring the pH of the coolant above 7.0, an alkaline substance such as sodium hydroxide, potassium hydroxide or an alkanolamine should be added. A pH below 7.0 would tend to cause corrosion.
    • Example
  • The following ingredients were mixed thoroughly with 81.5 parts by weight of a copolymer of ethylene oxide with ethylene glycol having an average molecular weight of 300:
    Triethanolamine 1.0
    Phosphate ester of oleic acid 5.0
    50% aqueous solution of potassium hydroxide 2.5
    Sulfurized oleic acid (10-12% sulfur) 5.0
    Chlorinated alpha-olefin (60% chlorine) 5.0
  • The resulting fluid was then used as the coolant in 13 successive high speed grinding operations in which a 5 inch diameter grinding wheel was driven at 6574 rpm. The workpiece was of 52100 (Rc60) steel and was 4 inches in diameter at the beginning of the first grinding operation. In each of the grinding operations the workpiece was driven at 215 rpm and the diameter of the workpiece was reduced by 0.100 inch. The abrasive in the grinding wheel was cubic boron nitride.
  • For comparison, three tests were conducted in each of which 13 successive grinding operations were performed. In each of these three tests the procedure was identical to that in the test first described, except that a different coolant was used in each of the three tests. In one test the coolant was a conventional hydrocarbon oil; in the other two tests the coolants were conventional aqueous cutting fluids.
  • In the test first described, the power consumed during the cutting operations was substantially less than the power consumed during each of the three tests, showing that the cutting fluid used in the first test had superior lubricity. The lower power consumption in the first test meant that there was less heat generation.

Claims (1)

1. A method of cooling and lubricating work pieces during grinding and severe machining operations by means of cubic boron nitride wherein the improvement comprises the step of supplying to the work pieces, as a coolant and lubricant, a copolymer of an alkylene oxide having from 2 to 3 carbon atoms with an alkylene glycol having from 2 to 3 carbon atoms, said copolymer having an average molecular weight from 190 to 400, and having a flash point over 340 degrees F.
EP87305006A 1987-02-18 1987-06-05 Method of cooling and lubricating work pieces during grinding and severe machining operations by means of cubic boron nitride Withdrawn EP0279098A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US1607787A 1987-02-18 1987-02-18
US16077 1987-02-18

Publications (2)

Publication Number Publication Date
EP0279098A2 true EP0279098A2 (en) 1988-08-24
EP0279098A3 EP0279098A3 (en) 1989-01-11

Family

ID=21775265

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87305006A Withdrawn EP0279098A3 (en) 1987-02-18 1987-06-05 Method of cooling and lubricating work pieces during grinding and severe machining operations by means of cubic boron nitride

Country Status (2)

Country Link
EP (1) EP0279098A3 (en)
JP (1) JPS63207562A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2229472A1 (en) * 1973-05-14 1974-12-13 Universal Oil Prod Co
DE2411827A1 (en) * 1974-03-12 1975-09-25 Fleischer Quenching fluids for hardening metals - contg polyalkylene glycols esp polyethylene glycols and homologues or ethylene oxide and propylene oxide copolymers
US4033886A (en) * 1975-01-31 1977-07-05 Suntech, Inc. Recycleable metalworking liquid

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2229472A1 (en) * 1973-05-14 1974-12-13 Universal Oil Prod Co
DE2411827A1 (en) * 1974-03-12 1975-09-25 Fleischer Quenching fluids for hardening metals - contg polyalkylene glycols esp polyethylene glycols and homologues or ethylene oxide and propylene oxide copolymers
US4033886A (en) * 1975-01-31 1977-07-05 Suntech, Inc. Recycleable metalworking liquid

Also Published As

Publication number Publication date
EP0279098A3 (en) 1989-01-11
JPS63207562A (en) 1988-08-26

Similar Documents

Publication Publication Date Title
CN108048197A (en) A kind of fully synthetic cutting fluid processed suitable for aluminium alloy and preparation method thereof
EP1013751A1 (en) Water-soluble cutting fluid
RU2597599C1 (en) Cooling lubricant concentrate
US20120177938A1 (en) Metalworking fluid, metal working method and metal work product
EP1167498A1 (en) Metal working fluid
US20130150271A1 (en) Metalworking fluid composition and method for its use in the machining of compacted graphite iron
EP0901510A1 (en) A method for mechanical working
US3501404A (en) Aqueous lubricants for metal working
EP0279098A2 (en) Method of cooling and lubricating work pieces during grinding and severe machining operations by means of cubic boron nitride
US3202607A (en) Metal working fluids
US3214423A (en) Thiophosphates of polyoxyethylene compounds
SU777053A1 (en) Cutting fluid for mechanical working of metals
US2990369A (en) Titanium cutting and grinding lubricant
JPS61166893A (en) Water-soluble cutting oil composition
US2453708A (en) Grinding oil composition
RU2676690C1 (en) Lubricant and cooling technological means for treatment of metals by cutting and diamond grinding
JPH02225595A (en) Synthetic fluid for treating metal
SU863624A1 (en) Cutting fluid for mechanical working of metals
CN106520302A (en) Lubricant composite for niobium alloy cutting process technology
SU836077A1 (en) Cutting fluid for diamond treatment of ceramic articles
RU2136726C1 (en) Lubricating composition for cold plastic metal working
RU2136725C1 (en) Lubricating composition for cold plastic metal working
SU639921A1 (en) Coolant for machining metals
RU2124044C1 (en) Cutting liquid for machining of metals
SU1482932A1 (en) Lubricant for mechanical working of metals

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): BE CH DE ES FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE CH DE ES FR GB IT LI NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19890712

RIN1 Information on inventor provided before grant (corrected)

Inventor name: TWINING, THOMAS F.