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1. 发明专利

JP2000005937A METHOD AND DEVICE FOR FITTING ANNULAR COMPONENT 失效
公开(公告)号：JP2000005937A
公开(公告)日：2000-01-11
申请号：JP17328598
申请日：1998-06-19
申请人： NIPPON SEIKO KK
发明人： HORI KEIZO , KOKUBU HIDEKI
IPC分类号： B23P11/02
摘要： PROBLEM TO BE SOLVED: To provide an annular component fitting method and its device whereby an inner shell component can be fitted in place at a high rate of success at a lower heating temperature irrespective of whether or not roundness before heating is admissible and differences in material only if the localized thickness of an outer shell component is good by heating the outer shell component while correcting it. SOLUTION: This device has a mold 3 of good bore accuracy, for binding the outer peripheral surface of an annular outer shell component 1 made of magnetic substance, insertion/conveyance means 5A, 5B for inserting the outer shell component 1 into the mold 3, and an outer-shell-component-heating high frequency coil 4 provided in proximity to the radially inner part of the mold 3. When the outer shell component 1 is induction heated as it is bound at the bore of the mold 3, not only its outside diameter but also its inside diameter is corrected whereby an inner shell component can be fitted in place at a high rate of success.

2. 发明专利

JP2000001722A METHOD FOR HARDENING INNER DIAMETER SURFACE OF OUTSIDE DRUM IN TRACTION ROLLER TYPE SPEED CHANGE GEAR 失效
公开(公告)号：JP2000001722A
公开(公告)日：2000-01-07
申请号：JP16984198
申请日：1998-06-17
申请人： NIPPON SEIKO KK
发明人： KOKUBU HIDEKI
IPC分类号： C21D1/09 , C21D1/10 , C21D9/40
摘要： PROBLEM TO BE SOLVED: To prevent the imperfect hardening near the surface and the deformation of an outside drum and to reduce a cost for grinding and heat treatment by hardening the inner diameter surface of the outside drum with high energy beam in the state of inserting the outside drum into a die. SOLUTION: In the state of holding a first rotary shaft 2 of the outside drum 1 after cold-forging and grinding processes with a chuck 4 of a motor 3, the outer diameter surface of the outside drum 1 is inserted into a cavity 6 in the die 5 by extending the chuck 4 to restrict the whole outer diameter surface of the outside drum 1 in the die 5. Successively, the inner diameter surface of the outside drum 1 is irradiated with a laser beam from the upper opening part of the die 5 while rotating the outside drum 1 by driving the motor 3 to harden the whole inner diameter surface. During the beam irradiation, the thermal expansion of the outside drum 1 occurs, but since this thermal expansion is restricted with the die 5, the deformation of the outside drum 1 is corrected and the high circularity is secured. Further, since the heat capacity needed to harden with the beam is mode large by the die 5 and the cooling capacity is raised with the heat dispersion, the sufficient air-cooling effect is obtd.

3. 发明专利

JPH1163142A BALL SCREW 失效
公开(公告)号：JPH1163142A
公开(公告)日：1999-03-05
申请号：JP21946897
申请日：1997-08-14
申请人： NIPPON SEIKO KK
发明人： NAMIMATSU TAKESHI , KOKUBU HIDEKI , SEKIYA HIROAKI
IPC分类号： F16H25/22 , F16H25/24
摘要： PROBLEM TO BE SOLVED: To provide a ball screw which can increase strength of a root part of a tongue and can cope with a speeding up demand for a service condition of the ball screw. SOLUTION: In a circulating tube type ball screw having a ball copying tongue 11 in an end part of a circulating tube 7 to introduce and circulate a ball of a ball screw, residual compressive stress is preset to 20 to 150 kgf/mm in a depth of 20 to 100 μm from the outermost surface part, desirably, to 30 kgf/mm to 100 kgf/mm in a depth of 40 to 80 μm from the uppermost surface part in a joining part of the circulating tube 7 and the tongue 11 and its peripheral part.

4. 发明专利

JPH0543940A METHOD FOR HEAT-TREATING TRACKING SURFACE OF GUIDE RAIL FOR LINEAR GUIDE 失效
公开(公告)号：JPH0543940A
公开(公告)日：1993-02-23
申请号：JP6881591
申请日：1991-03-08
申请人： NIPPON SEIKO KK
发明人： KOKUBU HIDEKI
IPC分类号： C21D1/09 , C21D9/00 , C21D9/04 , C21D9/40
摘要： PURPOSE:To provide a heat treatment method for tracking surface in a guide rail for linear guide by which only the tracking surfaces of guide rail can uni formly and deeply be quenched and the guide rail having small bending due to heat strain is obtd. CONSTITUTION:Only the tracking surfaces 1a, 1b in the guide rail 1 for linear guide are hardened with high heat beam 3. Since only the tracking surfaces 1a, 1b in the guide rail 1 are hardened with the high heat beam 3, e.g. laser beam, only the tracking surfaces 1a, 1b in the guide rail 1 are uniformly and deeply quenched.

5. 发明专利

JPH11350036A METHOD FOR GIVING RESIDUAL COMPRESSIVE STRESS TO BEARING RING 失效
公开(公告)号：JPH11350036A
公开(公告)日：1999-12-21
申请号：JP16520798
申请日：1998-06-12
申请人： NIPPON SEIKO KK
发明人： HORI KEIZO , KOKUBU HIDEKI
IPC分类号： C21D1/18 , C21D9/40
摘要： PROBLEM TO BE SOLVED: To improve service life of a bearing assembling a bearing ring by giving the residual compressive stress having not less than a prescribed value to the bearing ring without applying an after-treatment of machining etc., and without increasing the producing time of bearing ring. SOLUTION: The bearing ring 1 executing quenching, is applied with a tempering in the state of restricted with a die 2 having smaller thermal expansion coefficient than that of the bearing ring 1 and shrunk and the residual compressive stress is given to the bearing ring 1 at the same time of tempering. At this time, the heat treatment condition of the tempering is adjusted so that the shrinkage ratio of the bearing ring 1 after treating becomes >=0.1%.

6. 发明专利

JPH11267757A DEFORMATION STRAIGHTENING METHOD OF STEEL MADE MEMBER 失效
公开(公告)号：JPH11267757A
公开(公告)日：1999-10-05
申请号：JP7089998
申请日：1998-03-19
申请人： NIPPON SEIKO KK
发明人： HORI KEIZO , KOKUBU HIDEKI , OHORI MANABU , SUZUKI SHINICHI , TANAKA NOBUYOSHI
IPC分类号： B21D3/00 , B21D3/10 , B21D3/16 , C21D1/00
摘要： PROBLEM TO BE SOLVED: To provide a heat treatment deformation straightening method which is suitably applicable to an object to be treated consisting of a material necessitating a precipitation hardening heat treatment after executing a solid solution heat treatment. SOLUTION: A deformation generating in the case of heat treating a steel made member is straightened by pressurizing the member W between two temperature adjusting type straightening dies 4A, 4B and deforming by warm press with a desired heat treatment parameter during the last process of hardening by heat treatment or in at least one of a process before or after this process for the member W. According to the deformation straightening method, the heat treatment deformation of the member consisting of an age precipitating material such as e.g. a maltensitic or semi-austenitic precipitation hardening type stainless steel is straightened profiling the shape of the straightening die by the precipitation of a precipitating object, the structural change of a base phase and the transfer of dislocation.

7. 发明专利

JPH10317054A ANNULAR MEMBER 失效
公开(公告)号：JPH10317054A
公开(公告)日：1998-12-02
申请号：JP30809797
申请日：1997-10-23
申请人： NIPPON SEIKO KK
发明人： KOKUBU HIDEKI , HORI KEIZO , OHORI MANABU
IPC分类号： F16C33/62 , B21D1/00 , C21D1/10 , C21D1/18 , C21D8/00 , C21D9/40
摘要： PROBLEM TO BE SOLVED: To easily provide the annular member having a desired surface hardness and roundness at a low cost. SOLUTION: A steel, which contains at least 0.4-1.5 wt.% Si, is subjected to tempering/straightening at a straightening rate of >=0.2% and a tempering parameter in a range of 8570-9250. The annular member tempered/straightened in this method has a hardness Hv of >=700 and a deformation straightening rate of >=70% further has excellent roundness while maintaining surface hardness.

8. 发明专利

JPH07286649A TOROIDAL TYPE CONTINUOUSLY VARIABLE TRANSMISSION 失效
公开(公告)号：JPH07286649A
公开(公告)日：1995-10-31
申请号：JP7883394
申请日：1994-04-18
申请人： NIPPON SEIKO KK
发明人： TAKEMURA HIROMICHI , KOKUBU HIDEKI
IPC分类号： F16C33/64 , F16H15/38
摘要： PURPOSE:To prevent fatigue cracks and improve longevity and reliability by forming out of carburized steel inner rings, outer rings, an input disk and an output disk at a toroidal type continuously variable transmission, administering shot peening processing after heat treatment, and afterwards, carrying out grinding finish. CONSTITUTION:In the case of a toroidal type continuously variable transmission which is equipped with power rollers 16, 17 that posses inner rings (power rollers) 16a, 17a, outer rings 16b, 17b and plural rolling bodies 16c, 17c, and transmit the motive power of an input shaft 13 to an output shaft 24 by the mutual engagement of the input and output disks 11, 12 and the inner rings 16a, 17c, the inner rings 16a, 17a, the outer rings 16b, 17b and the input and output disks 11, 12 are formed out of carburized steel, and heat treatment including carburizing treatment and quench is given to each member, and shot peening processing is given to a desired place, and then, grinding finish processing is carried out. As a result, micro cracks are removed, and the maximum remaining compressed stress of the front layer portion of each member is set within the range of, for example, 20-75kgf/mm .

9. 发明专利

JPH07208569A TOROIDAL TYPE CONTINUOUSLY VARIABLE TRANSMISSION 失效
公开(公告)号：JPH07208569A
公开(公告)日：1995-08-11
申请号：JP599794
申请日：1994-01-24
申请人： NIPPON SEIKO KK
发明人： IMANISHI TAKASHI , ABE TSUTOMU , KOKUBU HIDEKI
IPC分类号： F16C19/30 , F16C19/50 , F16C33/54 , F16H15/38
摘要： PURPOSE:To improve the durability of an outer ring by preventing the application of a large bending stress of the outer ring. CONSTITUTION:A thrust needle bearing 27a allows the relative displacement between an outer ring 30 and a trunnion 6, supporting a thrust load applied on the outer ring 30. The annular part which is dividedly formed by the inscribed circle and the circumscribed circle of the needles 33 and 33 which are arranged in an annular form forms a load receiving part which supports the thrust load. The pitch circle (a) of the balls 29 and 29 of a thrust ball bearing 26 which is constituted, including the outer ring 30 is superposed with the load receiving part.

10. 发明专利

JPH07208568A TOROIDAL TYPE CONTINUOUSLY VARIABLE TRANSMISSION 失效
公开(公告)号：JPH07208568A
公开(公告)日：1995-08-11
申请号：JP377294
申请日：1994-01-18
申请人： NIPPON SEIKO KK
发明人： MITAMURA NOBUAKI , ABE TSUTOMU , KOKUBU HIDEKI
IPC分类号： C21D1/18 , C21D9/36 , C21D9/40 , F16C33/32 , F16H15/38
摘要： PURPOSE:To provide a toroidal type continuously variable transmission which secures the long life by improving each rolling life of a power roller bearing, input disc, and an output disc, as for a toroidal type continuously variable transmission. CONSTITUTION:The rolling body 16c of a power roller bearing 16 and the rolling body 17c of a power roller bearing 17 as the constitution elements of a toroidal type continuously variable transmission 10 are made of the intermediate carbon steel or the high carbon steel, and treated with the carburization nitrifying treatment, quenching, and the annealing treatments.

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