WO2015182767A1 - Dispositif de vis a billes - Google Patents

Dispositif de vis a billes Download PDF

Info

Publication number
WO2015182767A1
WO2015182767A1 PCT/JP2015/065645 JP2015065645W WO2015182767A1 WO 2015182767 A1 WO2015182767 A1 WO 2015182767A1 JP 2015065645 W JP2015065645 W JP 2015065645W WO 2015182767 A1 WO2015182767 A1 WO 2015182767A1
Authority
WO
WIPO (PCT)
Prior art keywords
amount
screw shaft
formula
less
ball
Prior art date
Application number
PCT/JP2015/065645
Other languages
English (en)
Japanese (ja)
Inventor
成晃 阿部
秀幸 飛鷹
渡辺　靖巳
Original Assignee
日本精工株式会社
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 日本精工株式会社 filed Critical 日本精工株式会社
Priority to JP2016523590A priority Critical patent/JPWO2015182767A1/ja
Publication of WO2015182767A1 publication Critical patent/WO2015182767A1/fr

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present invention relates to a ball screw device, and more particularly to a ball screw device suitable for an injection molding machine.
  • the performance required for the ball screw device is that the movement in the axial direction is first performed stably.
  • As a cause of the change in the shape of the screw shaft there is a dimensional change due to separation or wear in which the surface of the raceway surface is partially lost or due to expansion or contraction of the steel material. That is, it can be said that providing a screw shaft excellent in peeling resistance, wear resistance, and dimensional stability is a high-quality ball screw device.
  • High-frequency heat treatment can heat only the necessary part by generating heat on the steel surface by induction heating.
  • a round bar made of steel is grooved.
  • the hardened layer causing the dimensional change is only on the surface of the screw shaft, and the same or better performance can be expected as compared with the carburizing treatment.
  • Patent Documents 1 and 2 can be referred to for the induction heat treatment in the screw shaft manufacturing process.
  • an object of the present invention is to provide a screw shaft that has superior dimensional stability, resistance to peeling including white peeling, and wear resistance.
  • the combination of high carbon steel and induction heat treatment has the problem of burning cracks and cracks when rebending.
  • the former can be avoided by frequency conditions and strict temperature management.
  • quenching is performed, the structure changes from austenite to martensite, and thermal deformation always occurs due to the density difference.
  • Such a deformation can be reduced by grooving after applying a hardened layer as described above, but in the ball screw device for an injection molding machine, the grooving is performed in order to secure the necessary shape as a machine part. Since it is often subjected to high-frequency heat treatment later, deformation due to heat treatment appears as bending of the screw shaft, and it is necessary to correct this by bending.
  • the screw shaft is a high carbon bearing steel or a steel material having an Ms point calculated by the following formula 1 of 172 ° C.
  • the ball screw device is interposed between a screw shaft having a spiral groove on the outer peripheral surface, a ball nut having a spiral groove facing the spiral groove of the screw shaft on the inner peripheral surface, and both the spiral grooves. It has a plurality of balls that can be circulated by a ball circulation path provided on the ball nut, and the screw shaft is made of a specific high carbon bearing steel, which is heat-treated to form an effective hardened layer on the surface. is there. There are no restrictions other than the screw shaft, such as balls and ball nuts.
  • Formula 1 550-361 [C] -39 [Mn] -20 [Cr] -17 [Ni] -5 [Mo]
  • Formula 2 (0.2 [C] +0.14) ⁇ (0.64 [Si] +1) ⁇ (4.1 ⁇ 1 [Mn] +1) ⁇ (2.33 [Cr] +1) ⁇ (3.14 [ Mo] +1) ⁇ (0.52 [Ni] +1)
  • [C], [Si], [Mn], [Cr], [Mo], [Ni] are the contents of C, Si, Mn, Cr, Mo, Ni in the steel material (mass%). ).
  • the carbon bearing steel there is no limitation as long as it is a high carbon bearing steel or a steel material that satisfies the formulas 1 and 2, but it is preferably a bearing steel containing 0.6% by mass or more of carbon and additionally containing chromium and manganese as essential components. . If the carbon content is less than 0.6% by mass, the heat treatment quality defined in the present invention cannot be obtained, so that the content is preferably 0.6% by mass or more. More preferably, the carbon content is 0.95% by mass or more.
  • the upper limit of carbon content when it exceeds 2 mass%, a coarse carbide
  • High carbon bearing steel contains nearly 1% by mass of carbon, and even if about 0.5% by mass of carbon necessary for quenching is dissolved in the base, a sufficient amount of carbide can remain on the raceway surface. Abrasion resistance can be improved.
  • Chromium is an element that improves hardenability and is preferably contained in an amount of 0.9% by mass or more. However, if the amount of chromium is excessive, the workability will decrease, so it is preferable to make it 2% by mass or less.
  • Manganese is an element that improves hardenability as well as chromium. It is preferable to add 0.2% by mass or more. However, if manganese is excessive, the workability will be lowered, so it is preferable to make it 2% by mass or less.
  • molybdenum it is preferable to contain molybdenum.
  • wear resistance can be improved more by making the value of Formula 1 in which the content in the steel of molybdenum with chromium and manganese is related into a specific range. It is presumed that this is because chromium, manganese and molybdenum dissolve in the carbide and harden the carbide.
  • JSI G 4805 high carbon chrome steel ISO 683-17 bearing steel
  • SUJ2-5 steel 100CrMnSi6-4 steel
  • SUJ2-5 steel and 100CrMnSi6-4 steel are preferred.
  • a round bar made of such a high carbon bearing steel is heat-cured to form an effective hardened layer having a hardness of Hv 500 or more on the surface layer portion.
  • the thermosetting treatment carburizing treatment may be used, but high-frequency heat treatment is preferable.
  • a round bar material made of the above steel material is inserted into a coil connected to a high-frequency power source, and a high-frequency current is passed through the coil. Thereby, an eddy current flows on the surface of the round bar material by the high frequency electromagnetic field, and the surface of the round bar material is heated.
  • a round bar raw material is heated over the full length by moving a coil to the axial direction of a round bar raw material. After heating, it is quenched by spraying an aqueous solution in which a water-soluble quenching solution is dissolved in a round bar material.
  • the effective hardened layer is 60% or less by volume in the cross section of the screw shaft. That is, the processing conditions (frequency, output, heating time), steel composition, screw shaft diameter, etc. so that the depth from the surface on which the effective hardened layer is formed is 60% or less with respect to the screw shaft diameter. Adjust according to.
  • An effective cured layer ratio of 60% or less means that the ratio of an uncured layer having a hardness of less than HV500 is 40% or more.
  • the non-hardened layer is a barite containing a ferrite phase and a cementite phase, but since the ferrite phase has a sufficiently low carbon content, it hardly changes even during long-time use, and the hardened layer of the surface layer is in the core. As a result of restraining, even if the amount of retained austenite of the surface layer generated by the heat treatment increases, the dimensional change in the axial direction hardly occurs.
  • the ratio of the non-cured layer may be 40% or more, and 60% or more is more effective.
  • the prior austenite grain size at the groove bottom is preferably fine, specifically 30 ⁇ m or less, more preferably 18 ⁇ m or less.
  • the amount of retained austenite at a depth of 50 ⁇ m from the raceway surface is set to 5 to 40% by volume.
  • surface retained austenite amount is set to 5 to 40% by volume.
  • the amount of retained austenite on the surface is 5 to 40 volumes. %, Preferably 9.7 to 35% by volume.
  • the hydrogen content on the rolling surface should be 0.61 ppm or less.
  • Test 1 A rod-shaped test piece made of a high carbon bearing steel having an alloy composition shown in Table 1 and having a diameter determined in consideration of a machining allowance by polishing was prepared, and transfer firing was performed by induction heat treatment at a frequency of 100 to 200 kHz. Next, a tempering treatment was performed at 160 to 200 ° C. for 2 hours, and 200 ⁇ m was removed from the black skin surface by polishing, and then subjected to a life test under the following conditions. In addition, in order to reproduce peeling of a hole screw apparatus, the rolling element used the ball
  • Test 2 As shown in Table 3, the rod-shaped test piece made of the steel material shown in Table 1 was used. The rod-shaped test piece was subjected to transfer baking by induction heat treatment at a frequency of 30 to 100 kHz, and then tempered at 160 to 200 ° C. for 2 hours. After removing 4 mm from the surface of the black skin by polishing, it was subjected to a life test similar to Test 1. Further, the DI value was calculated from the following formula 2. The results are shown in Table 3 and FIG. 3, and are shown as relative values (lifetime ratio) with respect to Comparative Example 3.
  • the life extension effect is recognized in Examples 6 to 10, and the DI value should be 2.8 or more.
  • the sixth embodiment and the eighth embodiment have substantially the same DI value, but the lifetime of the eighth embodiment is longer. This is considered to be due to the difference in quality between the two at the machining allowance position of 4 mm. That is, the steel material A (Ms point 155 ° C.) is used in Example 6, and the steel material C (Ms point 172 ° C.) is used in Example 8, and it is necessary to obtain a heat treatment quality of a certain level or more for the life extension effect. It can be seen that both the DI value and the Ms point are affected.
  • Test 3 As shown in Table 4, a rod-shaped test piece made of the steel material shown in Table 1 was used, subjected to induction heat treatment, and grooved to produce a screw shaft. And the hardness of the raceway surface of the produced screw shaft and the amount of surface retained austenite were measured. A ball screw device was produced using the produced screw shaft and subjected to the same life test as in Test 1. The results are shown in Table 4 and are shown as relative values (lifetime ratio) with respect to Comparative Example 6. The relationship between the life ratio and the amount of surface retained austenite is shown in a graph in FIG.
  • the steel material G used in Comparative Example 6 is difficult to increase the amount of surface retained austenite by high-frequency heat treatment, and the life extension effect is not recognized.
  • the amount of surface retained austenite can be increased by increasing the output in the high frequency heat treatment, and is 9.7% by volume or more. By doing so, it is understood that a sufficient life extension effect can be obtained, and it is preferably 13% by volume or more.
  • FIG. 4 is a graph showing the relationship between the hardness and the amount of retained austenite for the comparative example and the example with a life ratio of 1.6 or more.
  • Equation 3 and Equation 4 are shown together in Table 4, and the relationship between the value of Equation 3 and the life ratio is graphed in FIG. 5, and the relationship between Equation 4 and the life ratio is graphed in FIG.
  • the value of the expression 3 and the value of the expression 4 are 0 or more, and the life extension effect is obtained.
  • Expressions 3 and 4 are converted into relational expressions related to surface retained austenite, and each is shown by a straight line in FIG. 4.
  • the comparative example indicated by the plot “x” is surrounded by two straight lines related to Expression 3 or 4 It is outside the range of the specified area. That is, it is preferable to satisfy the expressions 3 and 4 simultaneously for extending the life.
  • Test 4 As shown in Table 5, the rod-shaped test pieces made of the steel materials shown in Table 1 were used, and screw shafts having different effective hardened layer ratios were produced by induction heat treatment. About the produced screw axis
  • the surface residual austenite amount is the amount of retained austenite at a depth of 50 ⁇ m from the raceway surface, and was measured by X-ray after removing the surface layer by 50 ⁇ m from the raceway surface. Further, the core portion (region having a hardness of less than Hv500) was chemically analyzed to obtain a metal structure.
  • FIG. 7 is a graph showing the relationship between the effective hardened layer ratio and the dimensional change rate in the axial direction.
  • Comparative Example 9 imitates the screw shaft of the current ball screw device, but the amount of dimensional change is the same as in Examples 38 to 45 despite the small amount of surface retained austenite. . From this, it can be said that making the average retained austenite amount 4.5% by volume or less is also effective for dimensional stability.
  • the surface retained austenite amount is 5 to 40% by volume, and the dimensional change rate is small. From this, it can be said that it is effective to make the surface retained austenite amount 5 to 40% by volume.
  • Test 5 As shown in Table 6, a rod-shaped material (diameter: 12.8 mm) made of a steel material shown in Table 1 was used, and a 1.5 R groove was formed on the circumference at the center in the longitudinal direction. The groove depth is 1.5 mm and the groove width is 3 mm. Thereafter, a screw shaft was produced by high-frequency heat treatment at a frequency of 10 to 30 kHz. For the produced screw shaft, the carbide area ratio at the groove bottom and the crystal grain size of prior austenite were measured. The results are also shown in Table 6.
  • FIG. 8 is a graph showing the relationship between the carbide area ratio at the groove bottom and the bending hardness ratio. In any screw shaft, it was confirmed that a crack occurred from the bottom of the groove, and at the same time, the crack did not stop and led to the fracture of the screw shaft.
  • Comparative Example 10 uses the current steel material and imitates the same quality as the current one, but Comparative Example 11 has a lower bending strength than Comparative Example 10.
  • the set output is increased in the high-frequency heat treatment to increase the amount of carbon penetration, and this is because the deformability of the matrix is reduced.
  • the set output is lower than that of Comparative Example 11, and the bending strength is equal to or higher than that of the current Comparative Example 10.
  • the bending hardness generally tends to increase as the hardness decreases.
  • residual austenite which is a soft structure when the amount of carbon penetration increases as in Comparative Example 11 Since the amount increases and as a result the hardness decreases, it is not suitable as an evaluation index.
  • a reasonable evaluation index is the solid solution amount of carbon in martensite, but it is not easy to quantitatively measure the solid solution amount.
  • the amount of solute carbon can be determined by subtracting the amount of carbon not dissolved in the material, that is, the amount of residual carbides, from the amount of carbon in the material.
  • the bending strength is improved when the amount of residual carbide is large, that is, the amount of dissolved carbon is small. From Examples 46 to 56, when the area ratio of carbide at the groove bottom is 1.5% or more, the bending strength is equal to or higher than the current level. It can be seen that strength is obtained.
  • the grain size of the prior austenite at the groove bottom is preferably 30 ⁇ m or less from the comparison between Comparative Example 11 and Examples 46 to 56. .
  • a ball screw device BS6316-10.5 (Nominal: JIS B1192 63 ⁇ 16 ⁇ 300-Ct7) was prepared and mounted on a ball screw durability tester manufactured by NSK Ltd. for durability test. Went.
  • the test conditions are as follows. Further, in Examples 57 to 61, high-frequency heat treatment was performed, and in Example 62 and Comparative Example 12, carburizing treatment was performed to adjust the amount of enriched gas, thereby adjusting the amount of hydrogen on the raceway surface.
  • the amount of hydrogen is determined by cutting the raceway surface of the screw shaft before the test and forming a solid whose upper surface of a 10 mm square cube is the raceway surface, and then heating from room temperature to 400 ° C.
  • FIG. 10 is a graph showing the relationship between the amount of hydrogen and the life ratio.
  • the Ms point was 173 ° C. or less
  • the DI value was 2.8 or more
  • the surface retained austenite amount was 5 to 40% by volume
  • the hydrogen amount on the raceway surface was It is 0.61 ppm or less, and all of them have a lifetime that is twice or more the calculated lifetime.
  • the ball screw device of the present invention has superior dimensional stability, resistance to peeling including white peeling, and wear resistance, it is particularly useful for ball screw devices for injection molding machines. Long life with performance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Transmission Devices (AREA)

Abstract

　Selon l'invention, l'arbre de vis de ce dispositif de vis à billes est produit par thermodurcissement d'acier à haute teneur en carbone ou d'un matériau d'acier ayant un point Ms inférieur ou égal à 172°C ou et une valeur DI supérieure ou égale à 2.8 ; et les caractéristiques suivantes se situent chacune dans une plage spécifique : (a) la proportion de la couche durcie efficace, (b) la structure métallique de la couche non durcie, (c) la teneur en austénite résiduelle moyenne, (d) la teneur en hydrogène au niveau de la surface de roulement, (e) la proportion en surface du carbure au niveau du fond de la gorge, et (f) la teneur en austénite résiduelle à une profondeur de 50 μm à partir de la surface du chemin de roulement.
PCT/JP2015/065645 2014-05-30 2015-05-29 Dispositif de vis a billes WO2015182767A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016523590A JPWO2015182767A1 (ja) 2014-05-30 2015-05-29 ボールねじ装置

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
JP2014112386 2014-05-30
JP2014-112386 2014-05-30
JP2014119697 2014-06-10
JP2014-119697 2014-06-10
JP2014-224033 2014-11-04
JP2014224033 2014-11-04
JP2015-012610 2015-01-26
JP2015012610 2015-01-26
JP2015-013626 2015-01-27
JP2015013626 2015-01-27

Publications (1)

Publication Number Publication Date
WO2015182767A1 true WO2015182767A1 (fr) 2015-12-03

Family

ID=54699081

Family Applications (3)

Application Number Title Priority Date Filing Date
PCT/JP2015/065638 WO2015182764A1 (fr) 2014-05-30 2015-05-29 Dispositif de vis à billes
PCT/JP2015/065632 WO2015182761A1 (fr) 2014-05-30 2015-05-29 Dispositif de vis sphérique
PCT/JP2015/065645 WO2015182767A1 (fr) 2014-05-30 2015-05-29 Dispositif de vis a billes

Family Applications Before (2)

Application Number Title Priority Date Filing Date
PCT/JP2015/065638 WO2015182764A1 (fr) 2014-05-30 2015-05-29 Dispositif de vis à billes
PCT/JP2015/065632 WO2015182761A1 (fr) 2014-05-30 2015-05-29 Dispositif de vis sphérique

Country Status (3)

Country Link
JP (3) JP6044744B2 (fr)
TW (3) TW201608152A (fr)
WO (3) WO2015182764A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117387459B (zh) * 2023-12-08 2024-02-27 天津德科智控股份有限公司 一种滚珠螺母内螺纹滚道加工精度的定性测量检具

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004076823A (ja) * 2002-08-13 2004-03-11 Nsk Ltd 転動装置
JP2005299720A (ja) * 2004-04-07 2005-10-27 Ntn Corp 自動車用ボールねじ
JP2010090924A (ja) * 2008-10-03 2010-04-22 Thk Co Ltd ボールねじ
JP2010255702A (ja) * 2009-04-23 2010-11-11 Nagato:Kk 転動溝付き軸部品

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10259451A (ja) * 1997-01-20 1998-09-29 Nippon Seiko Kk 転がり軸受
JP2000326856A (ja) * 1999-05-18 2000-11-28 Ntn Corp 電動式パワーステアリング装置
JP3975314B2 (ja) * 1999-08-27 2007-09-12 株式会社ジェイテクト 軸受部品素材及び転がり軸受の軌道輪の製作方法
JP2004115903A (ja) * 2002-09-30 2004-04-15 Ntn Corp ボールねじ部品およびボールねじ
JP4121393B2 (ja) * 2003-02-25 2008-07-23 株式会社ジェイテクト ねじ軸、ねじ軸の硬化方法およびボールねじ
JP2005155714A (ja) * 2003-11-21 2005-06-16 Nsk Ltd ボールねじ
JP2005240970A (ja) * 2004-02-27 2005-09-08 Nsk Ltd ねじ装置
JP2006083988A (ja) * 2004-09-17 2006-03-30 Nsk Ltd ボールねじ
JP5130886B2 (ja) * 2007-12-03 2013-01-30 日本精工株式会社 転がりねじ装置及びその製造方法
JP2009204036A (ja) * 2008-02-27 2009-09-10 Nsk Ltd ボールねじ装置
JP6040700B2 (ja) * 2012-10-23 2016-12-07 日本精工株式会社 転がり軸受

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004076823A (ja) * 2002-08-13 2004-03-11 Nsk Ltd 転動装置
JP2005299720A (ja) * 2004-04-07 2005-10-27 Ntn Corp 自動車用ボールねじ
JP2010090924A (ja) * 2008-10-03 2010-04-22 Thk Co Ltd ボールねじ
JP2010255702A (ja) * 2009-04-23 2010-11-11 Nagato:Kk 転動溝付き軸部品

Also Published As

Publication number Publication date
TW201608154A (zh) 2016-03-01
WO2015182761A1 (fr) 2015-12-03
JPWO2015182761A1 (ja) 2017-04-20
JPWO2015182767A1 (ja) 2017-04-20
TWI575171B (zh) 2017-03-21
JP6044744B2 (ja) 2016-12-14
JPWO2015182764A1 (ja) 2017-04-20
TWI575170B (zh) 2017-03-21
WO2015182764A1 (fr) 2015-12-03
TW201608152A (zh) 2016-03-01
TW201608153A (zh) 2016-03-01

Similar Documents

Publication Publication Date Title
US9394583B2 (en) Rolling bearing
JP2006348342A (ja) 転がり支持装置
JP2014020538A (ja) 転がり軸受、転がり軸受の製造方法、高周波熱処理装置
JP2009192071A (ja) 転がり軸受
JP2008223104A (ja) 転動軸
JP2015042897A (ja) ボールねじのねじ軸の製造方法、ボールねじ
JP5298683B2 (ja) 転がり軸受及びその製造方法
JP2006241480A (ja) 転がり支持装置、転がり支持装置の転動部材の製造方法、鋼の熱処理方法
JP5168898B2 (ja) 転動軸
JP2010025311A (ja) 転がり軸受及びその製造方法
JP2015218746A (ja) 転動軸
WO2015182767A1 (fr) Dispositif de vis a billes
JP2005273759A (ja) 転がり支持装置、転がり支持装置の構成部品の製造方法、鋼の熱処理方法
JP2005282854A (ja) 転がり軸受
WO2022202922A1 (fr) Galet de roulement et arbre
JP2010031307A (ja) ころ軸受
JP2008232212A (ja) 転動装置
JP2011080096A (ja) 転がり摺動部材の製造方法
JP2008266683A (ja) 転がり軸受構成部材の製造方法および転がり軸受
JP5879681B2 (ja) 転動軸の製造方法
WO2023026621A1 (fr) Roulement à rouleaux
JP2009079253A (ja) シャフト及びその製造方法
JP2009019713A (ja) 転がり軸受
JP2005290496A (ja) 転動部品および転がり軸受
JP2017002359A (ja) 転動軸の製造方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15799297

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2016523590

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15799297

Country of ref document: EP

Kind code of ref document: A1