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US3390562A - Lubricant for metal cold forming - Google Patents

Lubricant for metal cold forming Download PDF

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Publication number
US3390562A
US3390562A US480816A US48081665A US3390562A US 3390562 A US3390562 A US 3390562A US 480816 A US480816 A US 480816A US 48081665 A US48081665 A US 48081665A US 3390562 A US3390562 A US 3390562A
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United States
Prior art keywords
lubricant
organic
composition
cold forming
metal surface
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US480816A
Inventor
Rausch Werner
Hehn Karl Heinz
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Henkel Corp
Original Assignee
Hooker Chemical Corp
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Publication of US3390562A publication Critical patent/US3390562A/en
Assigned to HOOKER CHEMICALS & PLASTICS CORP, A CORP OF NY reassignment HOOKER CHEMICALS & PLASTICS CORP, A CORP OF NY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: OXY METAL INDUSTRIES CORPORATION
Assigned to OCCIDENTAL CHEMICAL CORPORATION reassignment OCCIDENTAL CHEMICAL CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE MARCH 30, 1982. Assignors: HOOKER CHEMICAS & PLASTICS CORP.
Assigned to PARKER CHEMICAL COMPANY, A DE CORP. reassignment PARKER CHEMICAL COMPANY, A DE CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: OCCIDENTAL CHEMICAL CORPORATION
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    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M111/00Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C9/00Cooling, heating or lubricating drawing material
    • B21C9/02Selection of compositions therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20Deep-drawing
    • B21D22/201Work-pieces; preparation of the work-pieces, e.g. lubricating, coating
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    • C10M2201/02Water
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    • C10M2201/065Sulfides; Selenides; Tellurides
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    • C10M2219/04Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
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    • C10N2040/00Specified use or application for which the lubricating composition is intended
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    • C10N2040/24Metal working without essential removal of material, e.g. forming, gorging, drawing, pressing, stamping, rolling or extruding; Punching metal
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    • C10N2080/00Special pretreatment of the material to be lubricated, e.g. phosphatising or chromatising of a metal

Definitions

  • This invention relates to an improved lubricant composition and more particularly it relates to an improved lubricant composition suitable for use in metal deformation processes, such as the cold forming of metal.
  • a lubricant ma? terial on the metal surface which contains one or more pigments suspended in a liquid or at least semi-liquid component.
  • liquid materials which may be used are mineral oil or animal or vegetable oil while flowers of sulfur, graphite, molybdenum sulfide and calcium carbonate are exemplary of pigment materials which are commonly used.
  • the use of such lubricants have, however, been found to be somewhat disadvantageous in that the pigments contained in the lubricant can be removed from the metal surface only with great difficulty after the cold forming operation has been completed. Frequently, a light coating of the pigment dust remains on the metal surface, which coating not only detracts from the appearance of the formed workpiece but also is detrimental to further processing of the workpiece, such as painting, plating, or the like.
  • lubricants which contain watersoluble pigments.
  • Compositions of this type have not been found to be comletely satisfactory since the carbohydrates used therein form sticky, syrup like masses when they come into contact with even small amounts of water. Since it is almost impossible to avoid the introduction of even minor amounts of water during the handling of these lubricant materials, their utility in cold forming operations has been extremely limited.
  • lubricant compositions containing up to about of a water-soluble pigment, such as trisodium phosphate such as trisodium phosphate.
  • a further object of the present invention is to provide an improved lubricant composition for metal cold forming operations, which lubricant has a good separating or parting action but which can be easily removed from the formed part using conventional cleaning compositions.
  • Another object of the present invention is to provide an improved process for the deformation of metal surfaces, which processes utilize the improved lubricant composition of the present invention.
  • the present invention includes a lubricant composition which comprises at least 20% by weight of a finely divided inorganic water-soluble, non-deliquescent salt and an organic lubricant material having a softening or melting point which is not in excess of about 90 centigrade, the inorganic salt being substantially uniformly dispersed throughout the organic lubricant, the amount of the organic lubricant being at least sufficient to provide for the dispersion of the inorganic salt and the entire composition being substantially free of water. It has been found that by the use of the above lubricant composition, difficult, deep-drawing operations are carried out satisfactorily and the lubricant residue on the formed pieces is easily removed by conventional cleaning methods.
  • the subject lubricant compositions comprise the watersoluble, non-deliquescent inorganic salt or pigment in an amount within the range of about 20 to about by weight of the composition.
  • the inorganic salt or pigment used has a relatively high melting point, e.g., above about 200 degrees centigrade, although in some instances, lower melting point materials may be used.
  • the inorganic pigment materials which may be included in the present composition are various alkali metal salts such as the alkali metal silicates, alkali metal pyrophosphates, alkali metal fluorobortes, alkali metal halides, alkali metal nitrites, alkali metal carbonates, alkali metal bicarbonates, and the like.
  • alkali metal is intended to refer to lithium, sodium, potassium, cesium and rubidium.
  • the preferred alkali metal is sodium and for this reason, primary reference hereinafter will be made to this material. This is not, however, to be taken as a limitation on the alkali metal which may be used, as satisfactory results are also obtained with other alkali metal compounds, such as those of potassium.
  • preferred alkali metal compounds for use in the compositions of the present invention are typified by the sodium silicates, including the ortho silicates, meta silicates and di-silicates; sodium pyrophosphates, including the dihydrogen pyrophosphate; (Na P O and Na P O sodium fluoroborate (NaBF sodium halide, including sodium chloride, sodium bromide, sodium fluoride, and sodium iodide; sodium.
  • sodium silicates including the ortho silicates, meta silicates and di-silicates
  • sodium pyrophosphates including the dihydrogen pyrophosphate
  • Na P O and Na P O sodium fluoroborate NaBF sodium halide, including sodium chloride, sodium bromide, sodium fluoride, and sodium iodide
  • inorganic pigment materials of the above type which contain water of crystallization may also be used in the present composition, provided that the compounds used do not form solutions which are substantially free of crystal phases in the transition from one hydrate state to another.
  • the inorganic pigment materials are of a very fine particle size, typical particle sizes being less than about 500 millimicrons and preferably within the range of about 20 to about 200 millimicrons.
  • exemplary of a typical finely divided pigment material which may be used is sodium bicarbonate having the following sieve analysis- Particle size Weight proportion
  • the organic lubricant component of the present composition is an organic material, either aliphatic, aromatic or mixed aliphatic-aromatic having a softening point which is not in excess of about centigrade. This organic lubricating material is present in the composition in an amount at least sufiicient to permit the substantially complete, uniform dispersion of the inorganic pigment material therein.
  • the organic lubricant material is present in the composition in an amount within the range of about 80 to about 20% by weight of the composition, although in some instances amounts of less than about 20% may be used provided there is still sufficient of the organic lubricant to provide for the dispersion of the inorganic pigment material.
  • the organic lubricant materials used may be in the form of an oil, a paste, or a solid and are exemplified by mineral oil, animal and vegetable oils and fats, fatty acids and fatty acid amides containing from 4 to 26 carbon atoms, waxes, paraffin wax, halogenated hydrocarbons, halogenated hydrocarbon waxes, such as those containing 18 to 26 carbon atoms and 20 to 80% of chemically combined chloride, petroleum jelly, petroleum sulfonate, sulfonated oils, montan wax and the like, as well as mixtures of one or more of these materials.
  • water soluble organic lubricant materials may also be used in order to provide lubricant compositions which may be even more easily removed from the formed pieces following the drawing operation.
  • water-soluble lubricants are polyvalent alcohols, such as glycerine and sorbitol; polyalkylene oxides, such as polyethylene oxide and polyethylene-polypropylene oxide; condensation products of polyethylene oxide with alkyl phenols containing 1 to 12 carbon atoms in the alkyl group, fatty acids, fatty alcohols and fatty amines, containing four to twenty-six carbon atoms in the alkyl group, and the like; Turkey red oils, fatty acid polydiethanolamides and the like.
  • this organic lubricant material may be classified as aliphatic organics having from about 4 to 100 carbon atoms.
  • the non-water soluble organic lubricants may be admixed with an emulsifying agent, particularly a nonionic emulsifier.
  • an emulsifying agent particularly a nonionic emulsifier.
  • emulsifying agents are the ethoxylated alkyl phenols, ethoxylated fatty alcohols and the like, such as those having 4 to 26 carbon atoms in the alkyl portion of the compound.
  • emulsifiers will be present in the compositions in amounts within the range of about 0.1 to about 5% by weight.
  • the lubricant compositions of the present invention are formulated by admixing the inorganic pigment material and the organic lubricant material so as to effect a substantially uniform dispersion of the pigment in the lubricant. This may be accomplished using a suitable mixing or stirring apparatus.
  • the admixing of the lubricant and pigment materials may be carried out at any suitable temperature, temperatures within the range of about 20 to about 100 degrees centigrade being typical. Where the organic lubricant material is a solid at room temperature, the mixing operation may be facilitated by using a temperature above the melting point of the material in order more easily to effect a dispersion of the inorganic pigment in the lubricant.
  • the lubricants of the present invention may be applied to the metal surfaces to be deformed in any convenient manner, as for example by brushing, roller coating, spraying, flowing, immersion, or the like.
  • the metal surface to which the lubricant composition is applied may have been subjected to a cleaning operation prior to the application of the lubricant, although this has not been found to be necessary as satisfactory results have also been obtained when applying the lubricant to an oily surface.
  • the metal surface may have been given a chemical coating, such as a phosphate coating, an oxide coating, a sulfide coating, an oxalate coating, or the like.
  • Example 1 An organic lubricant base was formulated containing 38% by weight of neutral degras and 62% by weight of mineral oil having a viscosity of 4.5 Engler at 50 centigrade. To this lubricant base were added various inorganic materials in varying amounts as indicated hereinafter, to form lubricating compositions. Blank steel sheets having a thickness of about 1 millimeter were coated with the various lubricant compositions and benzene tank halves, 50 x 40 x 20 centimeters, were formed from the lubricant coated steel sheet by deep drawing in one drawing operation. In each instance, the press was operated at the maximum annular holder pressure possible without tearing the steel sheet in the drawing operation. Using this procedure the following results were obtained:
  • Example 2 The procedure of Example 1 was repeated with the exception that the following lubricant compositions were used in place of those set forth in the preceding example:
  • Example 3 The procedure of Example 2 was repeated with the exception that in the lubricant compositions used, the sodium bicarbonate content was increased from 33% to 52%. Upon drawing the steel blanks coated with these lubricant compositions, as in Example 2, the maximum annular holder pressure in each instance was found to be about 260' tons.
  • Example 4 The procedure of Example 1 was repeated using the following lubricant compositions:
  • a method of deforming a metal surface which comprises coating the metal surface with a lubricant composition comprising from about 20% to by weight of a finely divided inorganic water-soluble non-deliquescent salt, selected from the group consisting of alkali metal fluoroborates, pyrophosphates, and bicarbonates and from about 80% to 20% by weight of an organic lubricant material having a softening point which is not in excess of Centigrade, the inorganic salt being substantially uniformly dispersed throughout the organic lubricant, the amount of the organic lubricant being at least sufficient to provide for the dispersion of the inorganic salt and the entire composition being substantially free of water, and, thereafter, deforming the thus-coated metal surface in a cold forming operation.
  • a lubricant composition comprising from about 20% to by weight of a finely divided inorganic water-soluble non-deliquescent salt, selected from the group consisting of alkali metal fluoroborates, pyrophosphates, and bicarbonates and
  • the inorganic salt in the lubricant composition is sodium bicarbonte having a particle size which is not substantially in excess of about 500 millimicrons.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
  • Metal Extraction Processes (AREA)

Description

United States Patent 33%,562 Patented July 2, 1968 3,390,562 LUBRICANT FOR METAL COLD FORMING Werner Rausch, Stierstadt, Taunus, and Karl Heinz Hahn,
Frankfurt am Main, Germany, assignors to Hooker Chemical Corporation, Niagara Falls, N.Y., a corporation of New York No Drawing. Filed Aug. 18, 1965, Ser. No. 480,816
Claims priority, applicati r; figemany, Aug. 20, 1964,
3 4 Claims. (Cl. 72-42) This invention relates to an improved lubricant composition and more particularly it relates to an improved lubricant composition suitable for use in metal deformation processes, such as the cold forming of metal.
In the cold forming of metals, particularly, in operations involving difficult shaping or so-called deep-drawing operations, it is customary to use a lubricant ma? terial on the metal surface which contains one or more pigments suspended in a liquid or at least semi-liquid component. Typical of the liquid materials which may be used are mineral oil or animal or vegetable oil while flowers of sulfur, graphite, molybdenum sulfide and calcium carbonate are exemplary of pigment materials which are commonly used. The use of such lubricants have, however, been found to be somewhat disadvantageous in that the pigments contained in the lubricant can be removed from the metal surface only with great difficulty after the cold forming operation has been completed. Frequently, a light coating of the pigment dust remains on the metal surface, which coating not only detracts from the appearance of the formed workpiece but also is detrimental to further processing of the workpiece, such as painting, plating, or the like.
In an effort to overcome these difiiculties, it has also been proposed to use lubricants which contain watersoluble pigments. Thus, it has been proposed to utilize a lubricant containing mineral oil and a solid, watersoluble, oil-insoluble carbohydrate, such as sucrose. Compositions of this type have not been found to be comletely satisfactory since the carbohydrates used therein form sticky, syrup like masses when they come into contact with even small amounts of water. Since it is almost impossible to avoid the introduction of even minor amounts of water during the handling of these lubricant materials, their utility in cold forming operations has been extremely limited. It has further been proposed to utilize lubricant compositions containing up to about of a water-soluble pigment, such as trisodium phosphate. The separating or parting action of such lubricants has, however, not been found to be sufficiently great to be satisfactory in difficult cold forming operations, such as deep-drawing processes. Accordingly, up to the present time, no completely satisfactory lubricant compositions have been available for use in difficult cold forming operations.
It is, therefore, an object of the present invention to provide an improved lubricant composition for use in the cold forming of metal.
A further object of the present invention is to provide an improved lubricant composition for metal cold forming operations, which lubricant has a good separating or parting action but which can be easily removed from the formed part using conventional cleaning compositions.
Another object of the present invention is to provide an improved process for the deformation of metal surfaces, which processes utilize the improved lubricant composition of the present invention.
These and other objects will become apparent to those skilled in the art from the description of the invention which follows.
Pursuant to the above objects, the present invention includes a lubricant composition which comprises at least 20% by weight of a finely divided inorganic water-soluble, non-deliquescent salt and an organic lubricant material having a softening or melting point which is not in excess of about 90 centigrade, the inorganic salt being substantially uniformly dispersed throughout the organic lubricant, the amount of the organic lubricant being at least sufficient to provide for the dispersion of the inorganic salt and the entire composition being substantially free of water. It has been found that by the use of the above lubricant composition, difficult, deep-drawing operations are carried out satisfactorily and the lubricant residue on the formed pieces is easily removed by conventional cleaning methods.
More specifically, in the practice of the present invention, the subject lubricant compositions comprise the watersoluble, non-deliquescent inorganic salt or pigment in an amount within the range of about 20 to about by weight of the composition. Desirably, the inorganic salt or pigment used has a relatively high melting point, e.g., above about 200 degrees centigrade, although in some instances, lower melting point materials may be used. Examplary of the inorganic pigment materials which may be included in the present composition are various alkali metal salts such as the alkali metal silicates, alkali metal pyrophosphates, alkali metal fluorobortes, alkali metal halides, alkali metal nitrites, alkali metal carbonates, alkali metal bicarbonates, and the like. It is to be ppreciated, that as used in the specification and claims, the term alkali metal is intended to refer to lithium, sodium, potassium, cesium and rubidium. Of these, the preferred alkali metal is sodium and for this reason, primary reference hereinafter will be made to this material. This is not, however, to be taken as a limitation on the alkali metal which may be used, as satisfactory results are also obtained with other alkali metal compounds, such as those of potassium.
Accordingly, preferred alkali metal compounds for use in the compositions of the present invention are typified by the sodium silicates, including the ortho silicates, meta silicates and di-silicates; sodium pyrophosphates, including the dihydrogen pyrophosphate; (Na P O and Na P O sodium fluoroborate (NaBF sodium halide, including sodium chloride, sodium bromide, sodium fluoride, and sodium iodide; sodium.
nitrite; sodium carbonate; and sodium bicarbonate. Of these, the latter two, namely, sodium carbonate and sodium bicarbonate have been found to be especially useful. It is to be further appreciated that inorganic pigment materials of the above type which contain water of crystallization may also be used in the present composition, provided that the compounds used do not form solutions which are substantially free of crystal phases in the transition from one hydrate state to another.
It has further been found that it is desirable if the inorganic pigment materials are of a very fine particle size, typical particle sizes being less than about 500 millimicrons and preferably within the range of about 20 to about 200 millimicrons. Exemplary of a typical finely divided pigment material which may be used is sodium bicarbonate having the following sieve analysis- Particle size Weight proportion The organic lubricant component of the present composition is an organic material, either aliphatic, aromatic or mixed aliphatic-aromatic having a softening point which is not in excess of about centigrade. This organic lubricating material is present in the composition in an amount at least sufiicient to permit the substantially complete, uniform dispersion of the inorganic pigment material therein. Preferably, the organic lubricant material is present in the composition in an amount within the range of about 80 to about 20% by weight of the composition, although in some instances amounts of less than about 20% may be used provided there is still sufficient of the organic lubricant to provide for the dispersion of the inorganic pigment material.
The organic lubricant materials used may be in the form of an oil, a paste, or a solid and are exemplified by mineral oil, animal and vegetable oils and fats, fatty acids and fatty acid amides containing from 4 to 26 carbon atoms, waxes, paraffin wax, halogenated hydrocarbons, halogenated hydrocarbon waxes, such as those containing 18 to 26 carbon atoms and 20 to 80% of chemically combined chloride, petroleum jelly, petroleum sulfonate, sulfonated oils, montan wax and the like, as well as mixtures of one or more of these materials. Additionally, water soluble organic lubricant materials may also be used in order to provide lubricant compositions which may be even more easily removed from the formed pieces following the drawing operation. Exemplary of such water-soluble lubricants are polyvalent alcohols, such as glycerine and sorbitol; polyalkylene oxides, such as polyethylene oxide and polyethylene-polypropylene oxide; condensation products of polyethylene oxide with alkyl phenols containing 1 to 12 carbon atoms in the alkyl group, fatty acids, fatty alcohols and fatty amines, containing four to twenty-six carbon atoms in the alkyl group, and the like; Turkey red oils, fatty acid polydiethanolamides and the like. In general this organic lubricant material may be classified as aliphatic organics having from about 4 to 100 carbon atoms.
Alternatively, in order to provide a more easily removable lubricant composition, the non-water soluble organic lubricants, as have been set forth hereinabove, may be admixed with an emulsifying agent, particularly a nonionic emulsifier. Exemplary of such emulsifying agents are the ethoxylated alkyl phenols, ethoxylated fatty alcohols and the like, such as those having 4 to 26 carbon atoms in the alkyl portion of the compound. Typically such emulsifiers will be present in the compositions in amounts within the range of about 0.1 to about 5% by weight.
The lubricant compositions of the present invention are formulated by admixing the inorganic pigment material and the organic lubricant material so as to effect a substantially uniform dispersion of the pigment in the lubricant. This may be accomplished using a suitable mixing or stirring apparatus. The admixing of the lubricant and pigment materials may be carried out at any suitable temperature, temperatures within the range of about 20 to about 100 degrees centigrade being typical. Where the organic lubricant material is a solid at room temperature, the mixing operation may be facilitated by using a temperature above the melting point of the material in order more easily to effect a dispersion of the inorganic pigment in the lubricant.
The lubricants of the present invention may be applied to the metal surfaces to be deformed in any convenient manner, as for example by brushing, roller coating, spraying, flowing, immersion, or the like. The metal surface to which the lubricant composition is applied may have been subjected to a cleaning operation prior to the application of the lubricant, although this has not been found to be necessary as satisfactory results have also been obtained when applying the lubricant to an oily surface. Additionally, the metal surface may have been given a chemical coating, such as a phosphate coating, an oxide coating, a sulfide coating, an oxalate coating, or the like. Such chemical coatings and the processes for applying them to metal surfaces to be deformed are well known to those in the art so that a further and detailed description of these processes is not deemed to be necessary. After subjecting the metal surfaces coated with the lubricants of the present invention to a drawing operation, it is found that the residual lubricant material is easily removed from the metal surfaces using a conventional alkaline cleaner. Additionally, during the drawing operation, it is found that by the use of the lubricant compositions of the present invention, higher annular holder pressures can be used in the press without tearing or rupturing the metal being deformed. The use of as high an annular holder pressure as possible is desired since the higher the pressure used the more of a decrease is obtained in point formations in the drawing operation.
In order that those skilled in the art may better understand the present invention and the manner in which it may be practiced, the following specific examples are given. In these examples unless otherwise indicated, temperatures are given in degrees centigrade and percents are by Weight.
Example 1 An organic lubricant base was formulated containing 38% by weight of neutral degras and 62% by weight of mineral oil having a viscosity of 4.5 Engler at 50 centigrade. To this lubricant base were added various inorganic materials in varying amounts as indicated hereinafter, to form lubricating compositions. Blank steel sheets having a thickness of about 1 millimeter were coated with the various lubricant compositions and benzene tank halves, 50 x 40 x 20 centimeters, were formed from the lubricant coated steel sheet by deep drawing in one drawing operation. In each instance, the press was operated at the maximum annular holder pressure possible without tearing the steel sheet in the drawing operation. Using this procedure the following results were obtained:
Maximum Annular Holder Pressure in Tons NaB F4 NaHCOs NdP204 1 Maximum value for the press used.
Example 2 The procedure of Example 1 was repeated with the exception that the following lubricant compositions were used in place of those set forth in the preceding example:
Percent Sodium bicarbonate 33 Neutral degras 25 Mineral oil, having a viscosity of 4.0 Engler at Sodium bicarbonate 33 Stearin pitch 25 Mineral oil, having a viscosity of 4.5 Engler at Beef tallow 25 Mineral oil, having a viscosity of 4.5 Engler at 50 C. 42 Sodium bicarbonate 33 Sodium bicarbonate 33 Mineral oil having a viscosity of 4.5 Engler at Blank steel sheets were coated with the above lubricant compositions as in Example 1 and benzene tank halves were again drawn from the lubricant coated blanks in a single drawing operation but using a larger press than in example. In each instance, the maximum annular holder pressure was found to be within the range of 140 to 190 tons.
Example 3 The procedure of Example 2 was repeated with the exception that in the lubricant compositions used, the sodium bicarbonate content was increased from 33% to 52%. Upon drawing the steel blanks coated with these lubricant compositions, as in Example 2, the maximum annular holder pressure in each instance was found to be about 260' tons.
Example 4 The procedure of Example 1 was repeated using the following lubricant compositions:
Percent NaBF 45 Oleic acid polydiethanolamide 55 Sodium bicarbonate 33 Addition product of polypropylene oxide and polyethylene oxide with ethylene diamine 67 Na P2O7 N,N,N,N tetrakis(2 hydroxypropyl)ethylenediamine NagHgPgoq Condensation product of polypropylene oxide and polyethylene oxide 68 Sodium bicarbonate 35 Ethoxylated fatty amine 5 Ethoxylated fatty alcohol 60 In each instance, excellent results were obtained upon subjecting the lubricant coated metal blanks to the drawing operation and the use of high annular holder pressures was possible in each case.
It was further noted that in all of the above examples, after the drawing operation, the lubricant composition was easily removed from the formed piece with a conventional alkaline cleaner. Due to the water-soluble nature of the organic phase of the lubricant composition used in Example 4, it was noted that these materials were removed even more easily from the formed sheets than were the lubricants of Examples 1, 2 and 3. In
no instance, however, was any difliculty encountered in cleaning the lubricant from the formed piece using a conventional alkaline cleaner.
While there have been described various embodiments of the invention, the compositions and methods described are not intended to be understood as limiting the scope of the invention, as it is realized that changes therewithin are possible and it is further intended that each element recited in any of the following claims is to be understood as referring to all equivalent elements for accomplising the same results in substantially the same or equivalent manner, it being intended to cover the invention broadly in whatever form its principle may be utilized.
What is claimed:
1. A method of deforming a metal surface which comprises coating the metal surface with a lubricant composition comprising from about 20% to by weight of a finely divided inorganic water-soluble non-deliquescent salt, selected from the group consisting of alkali metal fluoroborates, pyrophosphates, and bicarbonates and from about 80% to 20% by weight of an organic lubricant material having a softening point which is not in excess of Centigrade, the inorganic salt being substantially uniformly dispersed throughout the organic lubricant, the amount of the organic lubricant being at least sufficient to provide for the dispersion of the inorganic salt and the entire composition being substantially free of water, and, thereafter, deforming the thus-coated metal surface in a cold forming operation.
2. The method as claimed in claim 1 wherein the inorganic salt in the lubricant composition is sodium bicarbonte having a particle size which is not substantially in excess of about 500 millimicrons.
3. The method as claimed in claim 2 wherein prior to the application of the lubricant composition to the metal surface, the metal surface is coated with a chemical coating material.
4. The method as claimed in claim 3 wherein the chemical coating material is a phosphate coating material.
References Cited UNITED STATES PATENTS 2,254,756 9/ 1941 Segessemann.
2,291,166 7/ 1942 Maag.
2,990,610 7/1961 Luckerath et al. 252-25 X 3,065,175 11/1962 .Blake et al 252-25 X 3,065,176 11/1962 Blake et a1 25225 X 3,078,226 2/ 1963 Morway et al 252--25 X 3,178,367 4/1965 Dubin et a1. 252-25 X 3,227,651 1/1966 Peterson 25225 X DANIEL E. WYMAN, Primary Examiner.
PAT-RICK P. GARVIN, Examiner.
UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,390,562
July 2, 1968 Werner Rausch et al.
It is certified that error appears in the above identified patent and that said Letters Patent are hereby corrected as shown below:
Column 2, lines 28 and 29, "ppreciated" shoul Column 4, line 38, "Na P O should read Na P O Cancel "Oleic acid polydiethanolamid---55" same column 5.
d read appreciated 7 Column 5, line 25, and insert the same in Group '(A) Signed and sealed this 31st day of March 1970.
(SEAL) Attest:
Edward M. Fletcher, Jr. WILLIAM E. SCHUYLER, JR. Attesting Officer Commissioner of Patents

Claims (1)

1. THE METHOD OF DEFORMING A METAL SURFACE WHICH COMPRISES COATING THE METAL SURFACE WITH A LUBRICANT COMPOSITION COMPRISING ABOUT 20% TO 80% BY WEIGHT OF A FINELY DIVIDED INORGANIC WATER-SOLUBLE NON-DELIQUESCENT SALT, SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL FLUOROBORATES, PYROPHOSPHATES, AND BICARBONATES AND FROM ABOUT 80% TO 20% BY WEIGHT OF AN ORGANIC LUBRICANT MATERAL HAVING A SOFTENING POINT WHICH IS NOT IN EXCESS OF 90% CENTRIGRADE, THE INORGANIC SALT BEING SUBSTANTIALLY UNIFORMLY DISPERSED THROUGHOUT THE ORGANIC SALT BEING SUBSTANTIALLY UNIFORMLY DISPERSED THROUGHOUT THE ORGANIC LUBRICANT, THE AMOUNT OF THE ORGANIC LUBRICANT BEING AT LEAST SUFFICIENT TO PROVIDE FOR THE DISPERSION OF THE INORGANIC SALT AND THE ENTIRE COMPOSITION BEING SUBSTANTIALLY FREE OF WATER, AND, THEREAFTER, DEFORMING THE THUS-COATED METAL SURFACE IN A COLD FORMING OPERATION.
US480816A 1964-08-20 1965-08-18 Lubricant for metal cold forming Expired - Lifetime US3390562A (en)

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EP0247903A2 (en) * 1986-05-30 1987-12-02 Alcan International Limited Prelubricated finstock
FR2629103A1 (en) * 1988-03-23 1989-09-29 Lorraine Laminage Sheet metal for deep drawing; process and device for surface treatment for its manufacture
FR2651700A1 (en) * 1989-09-11 1991-03-15 Lorraine Laminage PROCESS FOR PACKING A METAL SHEET FLAN
EP0612834A1 (en) * 1992-12-29 1994-08-31 Castrol Limited Lubricant
EP0882809A2 (en) * 1997-05-19 1998-12-09 Henkel Corporation Composition and process for preventing blistering during heat treating of aluminum alloys
US5895776A (en) * 1996-09-17 1999-04-20 Chemische Fabrik Budenheim Rudolf A. Oetker Graphite-free mandrel bar lubricant
US20040029979A1 (en) * 2000-02-23 2004-02-12 William Hopkins Corrosion inhibiting rinsing agent
US20040029748A1 (en) * 1995-06-07 2004-02-12 Lee County Mosquito Control District Lubricant compositions and methods
DE102005006467A1 (en) * 2005-02-12 2006-08-24 Bayerische Motoren Werke Ag Shaping metal plates by deep drawing, to form vehicle bodywork parts, uses a lubricant spray over the positioned surfaces before gripping for movement into the deep drawing press

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US4191801A (en) 1977-02-08 1980-03-04 The Lubrizol Corporation Hot melt metal working lubricants
GB2124650A (en) * 1982-02-16 1984-02-22 Oxy Dry Corp Polyethylene oxide derived lubricants
EP0135932B1 (en) * 1983-09-28 1990-05-02 Hitachi, Ltd. Lubricant for metal forming and process for metal forming
GB2151526A (en) * 1983-12-09 1985-07-24 Apv Int Ltd Metal forming process and lubricant
AU4388400A (en) * 1999-07-15 2001-02-05 Hatch Associates Ltd. Improved casting lubricant containing metal fluoroborate salt and improved direct chill casting process
DE10256639A1 (en) 2002-12-03 2004-06-24 Thyssenkrupp Stahl Ag Lubricant-coated metal sheet with improved forming properties
DE102005023158A1 (en) * 2005-05-19 2006-11-23 BSH Bosch und Siemens Hausgeräte GmbH Method for deep drawing a flat sheet metal blank with a thermoforming tool

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EP0247903A3 (en) * 1986-05-30 1990-01-10 Alcan International Limited Prelubricated finstock
EP0247903A2 (en) * 1986-05-30 1987-12-02 Alcan International Limited Prelubricated finstock
FR2629103A1 (en) * 1988-03-23 1989-09-29 Lorraine Laminage Sheet metal for deep drawing; process and device for surface treatment for its manufacture
FR2651700A1 (en) * 1989-09-11 1991-03-15 Lorraine Laminage PROCESS FOR PACKING A METAL SHEET FLAN
WO1991003334A1 (en) * 1989-09-11 1991-03-21 Sollac Process for the improvement of the deep-drawing property of sheet metal or of a sheet metal blank
US5367903A (en) * 1989-09-11 1994-11-29 Sollac Process for improving the drawability of a metal sheet or sheet blank
EP0612834A1 (en) * 1992-12-29 1994-08-31 Castrol Limited Lubricant
US5580845A (en) * 1992-12-29 1996-12-03 Castrol Limited Lubricant
US20040029748A1 (en) * 1995-06-07 2004-02-12 Lee County Mosquito Control District Lubricant compositions and methods
US7553541B2 (en) * 1995-06-07 2009-06-30 Lee County Mosquite Control District Lubricant compositions and methods
US5895776A (en) * 1996-09-17 1999-04-20 Chemische Fabrik Budenheim Rudolf A. Oetker Graphite-free mandrel bar lubricant
EP0882809A2 (en) * 1997-05-19 1998-12-09 Henkel Corporation Composition and process for preventing blistering during heat treating of aluminum alloys
US6013142A (en) * 1997-05-19 2000-01-11 Henkel Corporation Composition and process for preventing blistering during heat treating of aluminum alloys
EP0882809A3 (en) * 1997-05-19 1999-08-25 Henkel Corporation Composition and process for preventing blistering during heat treating of aluminum alloys
US20040029979A1 (en) * 2000-02-23 2004-02-12 William Hopkins Corrosion inhibiting rinsing agent
DE102005006467A1 (en) * 2005-02-12 2006-08-24 Bayerische Motoren Werke Ag Shaping metal plates by deep drawing, to form vehicle bodywork parts, uses a lubricant spray over the positioned surfaces before gripping for movement into the deep drawing press

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CH441594A (en) 1967-08-15
BE659050A (en) 1965-05-17
FR1421796A (en) 1965-12-17
AT268491B (en) 1969-02-10
GB1081026A (en) 1967-08-31

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