WO2014192177A1 - 転がり軸受及びその包装方法 - Google Patents
転がり軸受及びその包装方法 Download PDFInfo
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- WO2014192177A1 WO2014192177A1 PCT/JP2013/076967 JP2013076967W WO2014192177A1 WO 2014192177 A1 WO2014192177 A1 WO 2014192177A1 JP 2013076967 W JP2013076967 W JP 2013076967W WO 2014192177 A1 WO2014192177 A1 WO 2014192177A1
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- Prior art keywords
- bearing
- rolling bearing
- rust preventive
- rolling
- grease
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/04—Preventing damage to bearings during storage or transport thereof or when otherwise out of use
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
- B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/58—Containers, packaging elements or packages, specially adapted for particular articles or materials for ball bearings, washers, buttons or like spherical or disc-shaped articles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
- F16C33/6607—Retaining the grease in or near the bearing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2585/00—Containers, packaging elements or packages specially adapted for particular articles or materials
- B65D2585/68—Containers, packaging elements or packages specially adapted for particular articles or materials for machines, engines, or vehicles in assembled or dismantled form
- B65D2585/6802—Containers, packaging elements or packages specially adapted for particular articles or materials for machines, engines, or vehicles in assembled or dismantled form specific machines, engines or vehicles
- B65D2585/6897—Containers, packaging elements or packages specially adapted for particular articles or materials for machines, engines, or vehicles in assembled or dismantled form specific machines, engines or vehicles others
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
- F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
- F16C19/26—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
- F16C19/28—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with two or more rows of rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2223/00—Surface treatments; Hardening; Coating
- F16C2223/30—Coating surfaces
- F16C2223/32—Coating surfaces by attaching pre-existing layers, e.g. resin sheets or foils by adhesion to a substrate; Laminating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/60—Thickness, e.g. thickness of coatings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49636—Process for making bearing or component thereof
- Y10T29/49703—Sealing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49636—Process for making bearing or component thereof
- Y10T29/49707—Bearing surface treatment
Definitions
- the present invention relates to a rolling bearing and a packaging method thereof.
- micro-lubrication methods such as oil lubrication such as oil air and oil mist lubrication and grease lubrication have been used in machine tool bearings (particularly machine tool spindle bearings) in order to reduce temperature rise due to agitation resistance of lubricating oil. ing.
- oil lubrication the cost is high due to the use of air, the noise generated by the wind noise of the rolling elements when the air blown from the nozzle toward the inside of the bearing passes through the inside of the bearing, and the outflow of oil after use from the oil drain hole
- bearings are packaged at the time of storage or transportation, and are generally opened and filled with grease just before use.
- the bearings are packaged with rust-preventive oil attached to the entire surface of the bearing. The grease does not adhere securely to the grease, and the grease flows out at an early stage during the initial running-in operation or the subsequent operation operation state, and the grease life is shortened.
- the maximum dmn value when using a bearing is as high as at least 500,000, and low temperature rise characteristics are required. Therefore, in order to suppress agitation resistance due to excessive lubricant, motor bearings, etc.
- the amount of grease charged is smaller, and the amount of grease charged for machine tool bearings is 10-20% by volume of the bearing internal space, and in some cases 10-15% by volume. ing. Therefore, in the case of a machine tool bearing, if grease is filled after opening as described above, the grease flows out and the amount of residual grease is extremely reduced.
- the lubricating oil inside the bearing does not change during use. If foreign matter enters the bearing during packaging, the foreign matter remains and hinders rotation.
- the present applicant applies rust preventive oil to the bearing surface with a film thickness of 40 ⁇ m or less, and packages the entire bearing with a vaporizable rust preventive film, and between the vaporizable rust preventive film and the bearing.
- rust preventive oil to the bearing surface with a film thickness of 40 ⁇ m or less, and packages the entire bearing with a vaporizable rust preventive film, and between the vaporizable rust preventive film and the bearing.
- the present invention provides the following rolling bearing and packaging method thereof.
- a rolling bearing comprising an inner ring, an outer ring, and a plurality of rolling elements that are movably held by a cage between the inner ring and the outer ring, Chloride ions and sulfate ions are removed from the entire bearing surface, rust preventive oil with an average film thickness of 4.5 to 10 ⁇ m is attached, and the entire bearing is covered with a vaporizable rust preventive film.
- a rolling bearing characterized in that the space between the rust film and the bearing is maintained in a reduced pressure state.
- rust preventive oil is deposited with an average film thickness of 4.5 to 10 ⁇ m, and the entire bearing is covered with a vaporizable rust preventive film.
- a method of packaging a rolling bearing characterized in that the space between the bearing and the bearing is maintained in a reduced pressure state. (5) By removing chloride ions from the entire surface of the rolling bearing, the amount of residual chloride ions per unit surface area adhering to the rolling bearing is set to 0.2 to 10 ng / mm 2.
- the bearing inner space formed by the inner ring, the outer ring and the rolling element is filled with grease, and the entire bearing is covered with the vaporizable rust preventive film, and the vaporizable rust preventive film.
- rust preventive oil is attached and sealed with a vaporizable rust preventive film, so that the amount of rust preventive oil attached is reduced. Also good rust prevention performance can be obtained. For this reason, even when grease is filled without being cleaned and degreased after opening, the influence of the rust preventive oil is reduced, and the lubrication performance and life are improved.
- 6 is a graph showing the results of Test Example 1. It is the schematic which shows the test apparatus used in Test Example 2 and Test Example 4. 6 is a graph showing the results of Test Example 2. 10 is a graph showing the results of Test Example 3. 10 is a graph showing the results of Test Example 4.
- chloride ions and sulfate ions are removed from the entire surface of the bearing, and then rust preventive oil is applied and sealed with a vaporizable rust preventive film.
- rust preventive oil is applied and sealed with a vaporizable rust preventive film.
- Chloride ions and sulfate ions adhere to the bearing surface from various machines, chemicals, and workers during the manufacturing process of the bearing.
- washing with a water displacement washing solution may be performed.
- the amount of residual chloride ions on the surface of the rolling bearing is preferably set to 0.2 to 10 ng / mm 2 .
- Grinding is mainly used in the manufacturing process of rolling bearings. In general, during grinding, processing is performed while applying a large amount of grinding water so that the dimensions of the product do not change due to heat generated during processing.
- Tap water is used as the grinding water, and the tap water always contains a chlorine component, that is, chloride ions.
- the amount of chloride ion in tap water is stipulated to be kept at 0.1 mg / L or more according to the Water Supply Law, while the water quality control target value is to keep the upper limit to 1 mg / L or less from the viewpoint of taste and smell. It is shown. Therefore, also in the manufacture of rolling bearings, the grinding water contains 0.1 to 1 mg / L of chloride ions. During grinding, a large amount of grinding water of about several tens of liters is poured on the rolling bearing, and a considerable amount of chloride ions adhere to the rolling bearing.
- chloride ions are contained in human body fluids (sweat, saliva, etc.), and chloride ions remain in places where the hand touches. Furthermore, chloride ions are also contained in the atmosphere, and chloride ions in the atmosphere are attached to the rolling bearing exposed to the atmosphere. Even when stored in a sealed container so as not to be exposed to the atmosphere, adhesion of a small amount of chloride ions is inevitable.
- FIG. 1 shows the relationship between the storage state of the bearing (outdoor storage in the air, storage in the air, storage in an indoor airtight container) and the amount of chloride ions remaining on the bearing surface.
- the measurement of the amount of residual chloride ions was performed by the following procedure (each process uses rubber gloves), and was performed using a chloride ion detector tube 201SA manufactured by Komyo Chemical Co., Ltd. (Measuring method) (1) With respect to the rolling bearing after being stored in the atmosphere or in a sealed container for a predetermined time, a portion other than the measurement location (bearing outer peripheral surface, etc.) is partitioned with a masking tape. (2) Put 100 mL of deionized water into a poly beaker.
- the amount of chloride ions per unit area is suppressed to 0.2 to 10 ng / mm 2 .
- the rust-preventing oil is not particularly limited as long as it does not cause stickiness, is excellent in workability, and can easily control the amount of adhesion, but for example, a rust-preventing oil containing no petrolatum may be used. preferable. Moreover, in order to control easily the adhesion amount of rust prevention oil, it is preferable that the viscosity of rust prevention oil shall be 10 cst or more and 60 cst or less.
- the method of attaching the rust preventive oil is not particularly limited as long as the film thickness can be adjusted, and examples thereof include a centrifugal deoiling method, an air blow method, and a vacuum heating method.
- a centrifugal deoiling method an air blow method
- a vacuum heating method it is preferable to use an air blow method in order to deposit the rust preventive oil evenly.
- the amount of rust preventive oil attached is 4.5 to 10 ⁇ m in average film thickness.
- the average film thickness is less than 4.5 ⁇ m, it becomes difficult to maintain the rust prevention performance for a long time. Further, since the rust preventive oil reacts with the grease to cause crystal precipitation and lowers the acoustic characteristics, the reaction with the grease is likely to occur when the amount of the rust preventive oil exceeds the average film thickness of 10 ⁇ m.
- a resin film such as a polyethylene film containing a rust preventive agent such as an organic carboxylic acid amine salt, a phosphoric acid amine salt, a carbonic acid amine salt or a heterocyclic amine salt is used.
- a rust preventive agent such as an organic carboxylic acid amine salt, a phosphoric acid amine salt, a carbonic acid amine salt or a heterocyclic amine salt.
- rust inhibitors include dicyclohexylammonium nitrite, dicyclohexylammonium caprylate, cyclohexylamine carbamate, cyclohexylamine laurate, diisopropylammonium nitrite, nitronaphthalene ammonium nitrite, ammonium benzoate, cyclohexylamine benzoate.
- vaporizable rust preventive film it is preferable to use a film processed into a bag shape as shown in FIGS. 1 to 5 in order to accommodate the rolling bearing and maintain the reduced pressure state.
- the vaporizable rust-proof film is preferably transparent. By making it transparent, it is possible to confirm the marking or the like in the packaged state. For example, if inspection results such as dimensional differences are printed directly on the bearing with a laser marker or the like, these can be confirmed without contaminating the bearing. In particular, it can be confirmed more easily by printing on the outer ring end surface, the inner ring end surface, or the outer ring outer diameter surface.
- the space between the vaporizable rust preventive film and the bearing is reduced in pressure and sealed. And in order to hold
- Such a packaging can reliably prevent rolling bearings from rusting and adhesion of foreign substances in the atmosphere during storage and transportation.
- the cleaning step and the degreasing step are not required, and even when the grease is filled, the influence of the rust preventive oil is reduced, and the lubricity can be maintained satisfactorily.
- the above packaging may be in a state where grease is filled in the bearing internal space formed by the inner ring, outer ring and rolling elements, or in a state before filling with grease.
- Packaging in a state filled with grease eliminates the need for a grease filling step before use.
- the packaging film since the space between the vaporizable rust preventive film and the bearing is in a reduced pressure state, the packaging film enters a concave shape between the inner and outer rings, and the grease does not flow out even when subjected to vibration during transportation.
- the type of the rolling bearing is not limited, and can be applied to the packaging of the angular ball bearing 1 as shown in FIG. That is, the angular ball bearing 1 immediately after manufacture is washed with a water displacement cleaning solution to remove chloride ions and sulfate ions, and an antirust oil is deposited with an average film thickness of 4.5 to 10 ⁇ m. It puts in the bag which consists of a film 10, and it vacuums and seals with heat seal etc. Note that reference numeral 11 in the figure denotes a seal portion.
- wheel side member which assembled the inner ring
- the sealed state can be maintained until immediately before the bearing is assembled, and adhesion of foreign matter and rusting in the atmosphere can be more effectively suppressed.
- the inner ring side member and the outer ring 2D are packaged separately as described above, the grease is not filled.
- the double-row cylindrical roller bearing 3 is packaged, the inner ring 3A, the cylindrical roller 3B, and the cage 3C of the double-row roller bearing 3 are assembled as shown in FIG. 3D may be sealed in a bag made of separate vaporizable rust preventive film 10.
- the bag which consists of a vaporizable rust preventive film ("Boselon” by Aicero Chemical Co., Ltd.), vacuumed, and then sealed by heat sealing to obtain a test specimen.
- the average film thickness (t) of the rust preventive oil is ⁇ S
- the total surface area of the rolling members (outer ring, inner ring, cage, rolling element) of the rolling bearing is S, Calculated.
- the adhesion amount ( ⁇ S) is obtained by measuring the weight difference (M) before and after the rust preventive oil is adhered and dividing by the specific gravity ( ⁇ ) of the rust preventive oil.
- each specimen was left in a high-temperature and high-humidity environment of 50 ° C.-90% RH, and the period until rust was generated was compared.
- the environment of 50 °C -90% RH there is an acceleration effect about 30 times in rusting compared to the case of standing at 20 °C -70% RH, which is the average temperature and humidity in Japan. Appropriate years are also shown.
- a result is shown in FIG. 7, and it turns out that the rust prevention performance at the time of packaging falls remarkably when the adhesion amount of rust prevention oil is less than an average film thickness of 4.5 micrometers. From this result, it can be seen that excellent rust prevention performance can be maintained for a long period of time by setting the adhesion amount of the rust prevention oil to an average film thickness of 4.5 ⁇ m or more.
- Test Example 2 Grease retention test
- the specimen prepared in Test Example 1 was opened, and 1.1 g of grease (MTE manufactured by Nippon Seiko Co., Ltd.) (15% of the bearing internal space volume) was sealed in the bearing inner space formed by the inner ring, outer ring, and balls.
- a test bearing was prepared. And using the testing machine shown in FIG. 8, after rotating for 24 hours on the conditions shown below, the grease residual ratio was measured.
- a test bearing for comparison was prepared by washing and degreasing and enclosing grease in the same bearing without rust preventive oil adhesion, and the residual grease rate was measured in the same manner.
- the remaining grease rate is expressed as a percentage obtained by dividing the difference between the weight of the bearing before rotation (M1) and the weight of the bearing after rotation (M2) by the amount of grease (M3). The value is subtracted from 100, and if the residual grease rate is low, the grease life is shortened.
- ⁇ Built-in preload 120N
- -Driving posture Vertical-Driving method: Belt drive-Outer cylinder cooling: None
- the results are shown in FIG. 9.
- the average film thickness up to 10 ⁇ m is 97% on average for the residual grease ratio of the comparative test bearing of 99%, which is equivalent to the conventional method of using the sealed grease after cleaning and degreasing the bearing. It can be seen that it has grease retention. On the other hand, when the average film thickness is 15 ⁇ m or more, the grease remaining rate tends to decrease. From this result, it can be understood that the grease retention and the lubrication life equivalent to the conventional one can be maintained by setting the adhesion amount of the rust preventive oil to an average film thickness of 10 ⁇ m or less.
- Test Example 3 Grease precipitation test
- a rust preventive oil was applied to an average film thickness of 10 ⁇ m, and then grease (MTE, MTS, NOK Cleaver manufactured by NSK Ltd.)
- MTE, MTS, NOK Cleaver manufactured by NSK Ltd. A total of 60 test bearings each containing 10 isoflex NBU15) and 10 comparative test bearings that were cleaned and degreased and sealed with grease without adhering rust preventive oil were produced.
- Each test bearing is placed in a thermostatic chamber, and after several heat cycles of changing the temperature from “0 ° C. ⁇ 30 ° C. ⁇ 60 ° C.” every few hours, a noise count measurement is performed once. 4 times in total.
- the noise count before and after the heat cycle of the bearing was measured using a noise tester mounted on a known Anderon device (acoustic measuring device).
- Test Example 4 Bearing temperature rise test
- the test body in which the adhesion amount of the rust preventive oil was adjusted to an average film thickness of 10 ⁇ m was opened, and 1.1 g of grease (MTE manufactured by Nippon Seiko Co., Ltd.) was filled (15% of the bearing internal space volume).
- a test bearing was prepared.
- a comparative test bearing in which grease was sealed without adhering rust preventive oil after washing and degreasing was prepared.
- Each test bearing was rotated under the following conditions using the test apparatus used in Test Example 2, and the outer ring temperature at that time was measured.
- ⁇ Built-in preload 120N
- -Driving posture Vertical-Driving method: Belt drive-Outer cylinder cooling: None
- chloride ions were newly deposited by the treatment shown in Table 1, and the amount of chloride ions was measured.
- a rolling bearing is immersed in a bath from a certain amount of ultrapure water at 80 ° C. for 2.5 hours to dissolve chloride ions, and then the solution is collected from the bath and ion chromatography analyzer manufactured by Dionex. Measurement was performed with DX-120 and a separation column IonPacAS12A (4 mm). The measurement method was performed under the same conditions as in FIG. 6 of JIS K0127. Quantification was performed on chloride ions, and the amount per unit area was calculated. The results are also shown in Table 1.
- rust acceleration test was conducted on rolling bearings that had been subjected to the same treatment.
- rust preventive oil is applied to rolling bearings with an average film thickness of 4.5 ⁇ m, and sealed with a vaporizable rust preventive film, and left in a high temperature and high humidity environment of 50 ° C. and 90% RH for 30 days. Then, the presence or absence of rust generation on the surface of the rolling bearing was confirmed.
- Table 1 The results are also shown in Table 1.
- rust generation can be prevented when the chloride ion amount is 5 to 10 ng / mm 2 .
- the film thickness of the rust preventive oil specified in the present invention is 4.5 ⁇ m. It can be seen that by making the above (4.5 to 10 ⁇ m), good rust prevention performance can be obtained.
- the present invention is suitable for storage and transportation of machine tool bearings (particularly machine tool spindle bearings).
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Rolling Contact Bearings (AREA)
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Abstract
Description
(1)内輪と、外輪と、前記内輪及び前記外輪との間に保持器により転動自在に保持された複数の転動体とを備える転がり軸受において、
軸受全面から塩化物イオン及び硫酸イオンが除去され、平均膜厚4.5~10μmの防錆油が付着されているとともに、軸受全体が気化性防錆フィルムで被覆され、かつ、前記気化性防錆フィルムと軸受との間が減圧状態に保持されていることを特徴とする転がり軸受。
(2)前記転がり軸受に付着している単位表面積当りの残留塩化物イオンの量が0.2~10ng/mm2であることを特徴とする上記(1)記載の転がり軸受。
(3)内輪と外輪と転動体とで形成される軸受内部空間にグリースを充填した状態で、軸受全体が気化性防錆フィルムで被覆され、かつ、前記気化性防錆フィルムと軸受との間が減圧状態に保持されていることを特徴とする上記(1)または(2)記載の転がり軸受。
(4)軸受構成部材を組み立てた後の転がり軸受を包装する方法であって、
軸受全面から塩化物イオン及び硫酸イオンを除去した後、防錆油を4.5~10μmの平均膜厚で付着させ、軸受全体を気化性防錆フィルムで被覆するとともに、前記気化性防錆フィルムと軸受との間を減圧状態に保持することを特徴とする転がり軸受の包装方法。
(5)前記転がり軸受全面からの塩化物イオンの除去により、該転がり軸受に付着している単位表面積当りの残留塩化物イオンの量が0.2~10ng/mm2にすることを特徴とする上記(4)記載の転がり軸受の包装方法。
(6)防錆油を付着した後、内輪と外輪と転動体とで形成される軸受内部空間にグリースを充填し、軸受全体を気化性防錆フィルムで被覆するとともに、前記気化性防錆フィルムと軸受との間を減圧状態に保持することを特徴とする上記(4)または(5)記載の転がり軸受の包装方法。
(測定方法)
(1)大気中や密封容器で所定時間保管した後の転がり軸受について、測定箇所(軸受外周面等)以外をマスキングテープで仕切る。
(2)脱イオン水100mLをポリビーカーに入れる。
(3)ガーゼを適当に畳んでビーカーの脱イオン水で湿らせる。
(4)湿ったガーゼで測定箇所を平行方向にぬぐう。
(5)ガーゼをビーカー内の脱イオン水でよくすすぐ。
(6)(4)、(5)を繰り返す。
(7)採取後、使用したゴム手黒の表面を50mLの脱イオン水でよく洗い、洗浄に使用した脱イオン水をビーカーに戻して試料液とする。
(8)塩素イオン検知管の両端をチップカッタで切り取り、矢印を上に向けて試料液の中に入れる。
(9)試料液中に塩分があれば、検知管の下端より白色の変色層が現れる。試料液が検知管の上端まで浸透したら検知管を取り出し、変色層の先端の目盛で試料液の塩化物含有量を読み取る。
V=T/S
組み立て直後の呼び番号7008CTYNDBLP4のアンギュラ玉軸受(内径:40mm、外径:68mm、幅:15mm)を用意し、水置換型洗浄剤(アクア化学(株)製「アクアソルベント」)で洗浄して表面の塩化物イオン及び硫酸イオンを除去した。次いで、エアーブロー法により、軸受全面に、防錆剤としてペトロラタムを含まない潤滑油(JX日鉱日石エネルギー(株)製「アンチラストP-2810」;粘度:12cst)を、その付着量を変えて付着した。そして、気化性防錆フィルム(アイセロ化学社製「ボーセロン」)からなる袋に入れ、真空引きした後にヒートシールにより密封して試験体とした。尚、防錆油の平均膜厚(t)は、防錆油の付着量をΔS、転がり軸受の転動部材(外輪、内輪、保持器、転動体)の全表面積をSとし、下記式から算出した。また、付着量(ΔS)は、防錆油の付着前後の重量差(M)を測定し、防錆油の比重(ρ)で除して得られる。
t=ΔS/S (ただし、ΔS=M/ρ)
試験例1で作製した試験体を開封し、内輪、外輪及び玉で形成される軸受内部空間にグリース(日本精工(株)製MTE)を1.1g(軸受内部空間容積の15%)封入して試験軸受を作製した。そして、図8に示す試験機を用いて、下記に示す条件にて24時間回転させた後、グリース残存率を測定した。また、比較のために、洗浄・脱脂し、防錆油の付着のない同軸受にグリースを封入して比較用試験軸受を作製し、同様にしてグリース残存率を測定した。尚、グリース残存率とは、グリースを封入した状態の回転前の軸受重量(M1)と回転後の軸受重量(M2)との差を、グリース封入量(M3)で除した値を百分率で表し、100から引いた値であり、グリース残存率が低いとグリース寿命が短くなってしまう。
・組込時予圧:120N
・回転数:10000min-1(dm・n=54×104)
・運転姿勢:立形
・駆動方式:ベルト駆動
・外筒冷却:なし
呼び番号6202の深溝玉軸受を水置換型洗浄剤で洗浄した後、防錆油を平均膜厚が10μmとなるように付着した後、グリース(日本精工(株)製MTE、MTS、NOKクリューバー(株)製イソフレックスNBU15)を封入した試験軸受と、洗浄・脱脂し、防錆油を付着することなくグリースを封入した比較用試験軸受とを各10個ずつ計60個作製した。
試験例1において防錆油の付着量を平均膜厚10μmに調整した試験体を開封し、グリース(日本精工(株)製MTE)を1.1g(軸受内部空間容積の15%)封入して試験軸受を作製した。また、比較のために、洗浄・脱脂後に、防錆油を付着することなくグリースを封入した比較用試験軸受を作製した。そして、各試験軸受を試験例2で用いた試験装置を用い、下記条件にて回転させ、そのときの外輪温度を測定した。
・組込時予圧:120N
・回転数:最大12000min-1(dm・n=65×104)
・運転姿勢:立形
・駆動方式:ベルト駆動
・外筒冷却:なし
通常の研削加工により転がり軸受を作製し、全表面を研磨し、分析器の検出限界以下となるように、付着している塩化物イオンを除去した。
本出願は、2013年5月31日出願の日本特許出願(特願2013-115810)に基づくものであり、その内容はここに参照として取り込まれる。
2 単列円筒ころ軸受
2A 内輪
2B 円筒ころ
2C 保持器
2D 外輪
3 複列円筒ころ軸受
3A 内輪
3B 円筒ころ
3C 保持器
3D 外輪
10 気化性防錆フィルム
11 シール部
Claims (6)
- 内輪と、外輪と、前記内輪及び前記外輪との間に保持器により転動自在に保持された複数の転動体とを備える転がり軸受において、
軸受全面から塩化物イオン及び硫酸イオンが除去され、平均膜厚4.5~10μmの防錆油が付着されているとともに、軸受全体が気化性防錆フィルムで被覆され、かつ、前記気化性防錆フィルムと軸受との間が減圧状態に保持されていることを特徴とする転がり軸受。 - 前記転がり軸受に付着している単位表面積当りの残留塩化物イオンの量が0.2~10ng/mm2であることを特徴とする請求項1記載の転がり軸受。
- 内輪と外輪と転動体とで形成される軸受内部空間にグリースを充填した状態で、軸受全体が気化性防錆フィルムで被覆され、かつ、前記気化性防錆フィルムと軸受との間が減圧状態に保持されていることを特徴とする請求項1または2記載の転がり軸受。
- 軸受構成部材を組み立てた後の転がり軸受を包装する方法であって、
軸受全面から塩化物イオン及び硫酸イオンを除去した後、防錆油を4.5~10μmの平均膜厚で付着させ、軸受全体を気化性防錆フィルムで被覆するとともに、前記気化性防錆フィルムと軸受との間を減圧状態に保持することを特徴とする転がり軸受の包装方法。 - 前記転がり軸受全面からの塩化物イオンの除去により、該転がり軸受に付着している単位表面積当りの残留塩化物イオンの量が0.2~10ng/mm2にすることを特徴とする請求項4記載の転がり軸受の包装方法。
- 防錆油を付着した後、内輪と外輪と転動体とで形成される軸受内部空間にグリースを充填し、軸受全体を気化性防錆フィルムで被覆するとともに、前記気化性防錆フィルムと軸受との間を減圧状態に保持することを特徴とする請求項4または5記載の転がり軸受の包装方法。
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| EP18205157.3A EP3460276A1 (en) | 2013-05-31 | 2013-10-03 | Packaging method for a rolling bearing |
| JP2014557639A JP6183378B2 (ja) | 2013-05-31 | 2013-10-03 | 転がり軸受及びその包装方法 |
| US16/442,851 USRE48337E1 (en) | 2013-05-31 | 2013-10-03 | Rolling bearing and its packaging method |
| CN201380003309.XA CN104411989B (zh) | 2013-05-31 | 2013-10-03 | 滚动轴承及其包装方法 |
| EP13885525.9A EP3006759B1 (en) | 2013-05-31 | 2013-10-03 | Rolling bearing and method for wrapping same |
| US15/134,454 US9523391B2 (en) | 2013-05-31 | 2016-04-21 | Rolling bearing and its packaging method |
| US16/442,918 USRE48321E1 (en) | 2013-05-31 | 2019-06-17 | Rolling bearing and its packaging method |
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| US15/134,454 Continuation US9523391B2 (en) | 2013-05-31 | 2016-04-21 | Rolling bearing and its packaging method |
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| DE102015209272A1 (de) * | 2015-05-21 | 2016-11-24 | Aktiebolaget Skf | Verfahren zur Wartung und/oder Reparatur einer Maschinenanlage und zum Transport einer Lageranordnung |
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| CN106185049A (zh) * | 2016-08-29 | 2016-12-07 | 无锡三立轴承股份有限公司 | 轴承的内包装组件 |
| CN106185048A (zh) * | 2016-08-29 | 2016-12-07 | 无锡三立轴承股份有限公司 | 轴承用油液加注式包装袋 |
| CN106144246A (zh) * | 2016-08-29 | 2016-11-23 | 无锡三立轴承股份有限公司 | 轴承的防锈包装袋 |
| CN106241063A (zh) * | 2016-08-29 | 2016-12-21 | 无锡三立轴承股份有限公司 | 轴承用刺破式油液加注式包装袋 |
| CN113042537A (zh) * | 2021-04-12 | 2021-06-29 | 内蒙古联晟新能源材料有限公司 | 一种用于-35℃~+30℃环境温度中轧辊表面的防护方法 |
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Also Published As
| Publication number | Publication date |
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| JP6183378B2 (ja) | 2017-08-23 |
| USRE48337E1 (en) | 2020-12-01 |
| CN104411989A (zh) | 2015-03-11 |
| EP3096034A1 (en) | 2016-11-23 |
| CN104411989B (zh) | 2017-03-08 |
| US20150354633A1 (en) | 2015-12-10 |
| USRE48321E1 (en) | 2020-11-24 |
| US20160230812A1 (en) | 2016-08-11 |
| CN106870564B (zh) | 2019-10-25 |
| TWI525018B (zh) | 2016-03-11 |
| JP2016153695A (ja) | 2016-08-25 |
| JPWO2014192177A1 (ja) | 2017-02-23 |
| EP3006759A4 (en) | 2016-05-25 |
| CN106870564A (zh) | 2017-06-20 |
| EP3006759A1 (en) | 2016-04-13 |
| US9523391B2 (en) | 2016-12-20 |
| EP3460276A1 (en) | 2019-03-27 |
| US9377057B2 (en) | 2016-06-28 |
| EP3006759B1 (en) | 2018-12-05 |
| TW201444737A (zh) | 2014-12-01 |
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