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1. 发明专利

JP2000192805A MANUFACTURE OF HOLLOW CAM SHAFT AND HOLLOW CAM SHAFT 失效
公开(公告)号：JP2000192805A
公开(公告)日：2000-07-11
申请号：JP36982598
申请日：1998-12-25
申请人： TUBE FOMING CO LTD , NISSAN MOTOR
发明人： MINAMIYAMA HIDEO , SUZUKI KENJI , KANO MAKOTO , SAKAMOTO HIRONORI , KURAMOCHI TAKEHARU , NOHARA TSUNEYASU
IPC分类号： B21D26/02 , B21D26/033 , B21D26/047 , B21D53/84 , F01L1/04
摘要： PROBLEM TO BE SOLVED: To provide a manufacturing method for hollow cam shaft capable of reducing its weight and having excellent productivity and the hollow cam shaft being manufactured by this method and having excellent strength and durability. SOLUTION: This cam shaft is constituted in such a way that a raw material steel pipe having an outside diameter which is intermediate dimension between a diameter (Rb+h2) of an outer face of a cam lobe part 13 of a cam shaft rough material 10 and an outside diameter (2Rj) of a journal part 12 is used to shrink a diameter of a journal equivalent section of the raw material steel pipe and machine it in advance by plastic machining using a mold and then a wear-resistant material is built up by laser metal filling on a cam slide face of the cam shaft material 10 obtained by bulging and molding the cam lobe part 13. Consequently, it is possible to obtain a hollow cam shaft 1 in which, for example, an outside diameter (2Rs) of a cam shaft part 4 cylinders is larger than an outside diameter (2Rjf) of a journal part 2 positioned between cam lobe parts 3 and 3.

2. 发明专利

JPH11241605A HOLLOW INTEGRATED CAM SHAFT AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH11241605A
公开(公告)日：1999-09-07
申请号：JP4246098
申请日：1998-02-24
申请人： TUBE FOMING CO LTD , NISSAN MOTOR
发明人： NAKAMURA MASANOBU , MINAMIYAMA HIDEO , SUZUKI KENJI , KANO MAKOTO , SAKAMOTO HIRONORI
IPC分类号： B23P9/00 , B21D26/02 , B21D26/033 , B21D26/035 , B23K9/04 , B23K26/34 , F01L1/04 , B23K26/00
摘要： PROBLEM TO BE SOLVED: To ascertain required durability as well as improving productivity and substantially lightening. SOLUTION: This hollow integrated cam shaft is provided with a hollow shaft body 2 and a cam 10 having a cam ramp 11 and a cam nose 12 extending from the cam ramp 11. The cam 10 is provided with a cam backing section 10A having a cam nose backing section 12A, which is swelledly and integrally formed in the shaft body 2 and has a cam ramp backing section 11A and the cam nose backing section 12A extending from the ramp backing section 11A, a groove 13, which is formed extending to the cam lamp backing section 11A of the cam backing section 10A and the cam nose backing section 12A, a cam ramp 11, which is built up on the groove 13 and has sliding faces 11a and 12a, and a built-up layer 14 comprising an abrasion resistant material forming the cam nose 12.

3. 发明专利

JPH11107711A HOLLOW INTEGRATED TYPE CAM SHAFT AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH11107711A
公开(公告)日：1999-04-20
申请号：JP27160797
申请日：1997-10-03
申请人： TUBE FOMING CO LTD , NISSAN MOTOR
发明人： NAKAMURA MASANOBU , MINAMIYAMA HIDEO , SAKAMOTO HIRONORI , KANO MAKOTO , SUZUKI KENJI
IPC分类号： F01L1/04 , B21D53/06 , B21D53/84 , F16H53/02
摘要： PROBLEM TO BE SOLVED: To provide a hollow integrated type cam shaft, which is excellent in productivity, strength, and durability and can be lightened in weight, by providing a cam part, swelled from the outer circumference part of a single tube body or providing a cam part, and a journal part integrally. SOLUTION: In a hollow integrated type cam shaft driving an intake/exhaust valve of an automobile engine, the outer circumference part of a single tube body, for example, of a steel tube is partially swelled so that a cam part 2 and a journal part 3 are formed integrally. To the surface of this kind of cam part 2, a hardened layer 5 is formed by means of laser hardening treatment and the like. In this process, in consideration of balance between reduction in cam shaft weight and strength of the cam part 2, a ratio tf/tb of a minimum thickness tf to a thickness tb ranges from 0.3 to 1.0 when a minimum thickness of the part ranging from a cam nose top part 2t to a cam ramp part 2r of the cam part 2 is represented by tf while a thickness of the cam base part 2b is represented by tb. The thickness tc of the cam nose top part 2t ranges from 0.9 to 4.0 mm desirably.

4. 发明专利

JP2011104612A Tubular body expanding and contracting method, and tubular body expanding and contracting die 审中-公开
标题翻译：管体膨胀和承压方法，管体膨胀和承压
公开(公告)号：JP2011104612A
公开(公告)日：2011-06-02
申请号：JP2009261414
申请日：2009-11-17
申请人： Tokyo Institute Of Technology , Tube Foming Co Ltd , 国立大学法人東京工業大学 , 株式会社チューブフォーミング
发明人： HAGIWARA ICHIRO , MINAMIYAMA HIDEO
IPC分类号： B21D26/033
摘要： PROBLEM TO BE SOLVED: To provide a tubular body expanding and contracting method for forming a tubular body which has a polygonal cross section shape, in which the ratio of ridge parts to valley parts is large, and in which the sectional shape is not fixed, but is changed in each part.
SOLUTION: The tubular body expanding and contracting method includes a step of providing a stock tube (Step S1), a step of providing a die (Step S2), a step of applying an internal pressure to the stock tube (Step S3), a valley part forming step (Step S4), and a ridge part forming step (Step S5). In the die providing step (Step S2), a die movably divided into a plurality of sections in the radial direction of the stock tube and having die ridge parts and die valley parts, is provided. In the valley forming step (Step S4), valley parts are formed in the stock tube by the die ridge parts while closing the die. In the ridge part forming step (Step S5), the internal pressure of the tube with the valley parts formed therein is increased after closing the die, and ridge parts are formed in the stock tube by the die valley parts.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种管状体的膨胀收缩方法，其形成具有多边形横截面形状的管状体，其中脊部与谷部的比例大，并且其截面形状为不是固定的，而是在每个部分都改变了。解决方案：管体膨胀收缩方法包括提供储料管的步骤（步骤S1），提供模具的步骤（步骤S2），向储料管施加内部压力的步骤（步骤S3 ），谷部形成步骤（步骤S4）和脊部形成步骤（步骤S5）。在模具供给工序（工序S2）中，设置有在管子的径向可移动地分割成多个部分并具有模具脊部和模具谷部的模具。在谷形成步骤（步骤S4）中，在封闭模具的同时，通过模脊部分在储料管中形成谷部分。在脊部形成步骤（步骤S5）中，在封闭模具之后，其中形成有谷部的管的内部压力增加，并且通过模具谷部分在坯料管中形成脊部。版权所有（C）2011，JPO＆INPIT

5. 发明专利

JPS61236965A HOLLOW CAM SHAFT 失效
公开(公告)号：JPS61236965A
公开(公告)日：1986-10-22
申请号：JP7797685
申请日：1985-04-12
申请人： NISSAN MOTOR , KOKAN KAKO KK
发明人： KANO MAKOTO , MARAI YOSHIHIRO , FUJIKI AKIRA , NAKAMURA MASANOBU , MASUDA ATSUSHI , MINAMIYAMA HIDEO
IPC分类号： B21D26/02 , B21D26/033 , F01L1/04 , F16H53/02
摘要： PURPOSE:To increase fixing strength in the thrust direction of a cam shaft having a hollow cam piece and a hollow shaft fixed to each other by bulging by making the outer diameter of a stem portion of the cam shaft larger than the diameter of a central aperture of the cam piece. CONSTITUTION:The hollow cam shaft is formed of a hollow cam piece 2 having a central aperture 2a of a diameter Di and a hollow shaft 4 having an outer diameter Do (Do

6. 发明专利

JPS6297721A PRODUCTION OF CAM SHAFT 失效
公开(公告)号：JPS6297721A
公开(公告)日：1987-05-07
申请号：JP23460585
申请日：1985-10-22
申请人： NISSAN MOTOR , KOKAN KAKO KK
发明人： KANO MAKOTO , MARAI YOSHIHIRO , FUJIKI AKIRA , NAKAMURA MASANOBU , MASUDA ATSUSHI , MINAMIYAMA HIDEO
IPC分类号： B21D26/02 , B21D26/033 , B21D26/047 , F01L1/04
摘要： PURPOSE:To prevent the crack generation on a cam piece, to increase the phase accuracy and to reduce the grinding allowance by specifying the shape of the cam piece and forming die and by providing a stopper on the forming die in the production bulge-forming a hollow cam piece and hollow shaft. CONSTITUTION:The upper and lower dies 1, 2 are separated in order to fix a hollow shaft S, hollow cam piece C1, C2 and hollow journal piece J by using a bulge-forming die. And by ascending and descending the split dies 8b, 8a which fits respectively to the base side and nose side of the piece C1 these are assembled. The hollow part 20 thus formed has the cam profiling shape which adds the fitting allowance to the piece C1. The piece C1 of the cam profiling shape adding the grinding allowance of the finishing part to the cam profile of the cam shaft product is then fitted to the hollow part 20 and closely fitted to the stopper 23 for positioning in the thrust direction. The piece C2 and J are closely fitted to stopper 24, 25 similarly as well and the shaft S is expanded after descending the die 1.

7. 发明专利

JPS61282663A HOLLOW CAM SHAFT 失效
公开(公告)号：JPS61282663A
公开(公告)日：1986-12-12
申请号：JP12584485
申请日：1985-06-10
申请人： NISSAN MOTOR , KOKAN KAKO KK
发明人： KANO MAKOTO , MARAI YOSHIHIRO , FUJIKI AKIRA , NAKAMURA MASANOBU , MASUDA ATSUSHI , MINAMIYAMA HIDEO
IPC分类号： F16H53/02 , F01L1/04
摘要： PURPOSE:To improve the fixation strength between a hollow cam shaft and a hollow journal piece or a hollow cam piece by forming the minute uneven parts on the surface of the hollow hole of each piece and forming a hollow cam shaft through buldge molding. CONSTITUTION:Minute uneven parts are formed onto the surfaces of the hollow holes 2a and 3a of a hollow journal piece 2 and a hollow cam piece 3 which are used for a hollow cam shaft 1. When buldge molding is carried out by inserting these pieces into a hollow shaft 4, the minute uneven parts on the surface of the holes bite into the surface of the hollow shaft 4, and a high fixation strength can be obtained. Therefore, the stress concentration on the journal piece in buldge molding is not generated, and sufficiently also a small- sized journal piece can be used.

8. 发明专利

JPS6297722A PRODUCTION OF CAM SHAFT 失效
公开(公告)号：JPS6297722A
公开(公告)日：1987-05-07
申请号：JP23460685
申请日：1985-10-22
申请人： NISSAN MOTOR , KOKAN KAKO KK
发明人： KANO MAKOTO , MARAI YOSHIHIRO , FUJIKI AKIRA , NAKAMURA MASANOBU , MASUDA ATSUSHI , MINAMIYAMA HIDEO
IPC分类号： B21D26/02 , B21D26/033 , B21D26/047 , F01L1/04
摘要： PURPOSE:To prevent the crack generation of a cam piece and to increase the phase accuracy by positioning a hollow piece by providing an engaging part on the cam piece and forming die in the production method bulge-forming the cam piece and hollow shaft. CONSTITUTION:The upper and lower dies 1, 2 are separated in order to fix a hollow shaft S, hollow cam piece C1, C2 and hollow journal piece J by using a bulge-forming die. The split die 8b, 8a respectively fitting to the base side and nose side of the piece C1 are ascended and descended then. Stem presser 30a, 30b are ascended as well. Then the piece C1 is fitted onto the die 8b, the base side of the piece C1 is placed on an fitting part 21b and the engaging part 24, 21d respectively provided on the die 8b are fitted as well. The phase decision of the piece C1 and the positioning in the thrust direction can be performed simultaneously. Similar works are performed on the piece C2 as well and after setting up the piece J with its fitting the die 1 is descended, a shaft S is fitted to the hollow aperture, etc., of each piece and is expanded.

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