EP1038609A1 - Verfahren zur herstellung einer riegelplatte - Google Patents

Verfahren zur herstellung einer riegelplatte Download PDF

Info

Publication number
EP1038609A1
EP1038609A1 EP99940509A EP99940509A EP1038609A1 EP 1038609 A1 EP1038609 A1 EP 1038609A1 EP 99940509 A EP99940509 A EP 99940509A EP 99940509 A EP99940509 A EP 99940509A EP 1038609 A1 EP1038609 A1 EP 1038609A1
Authority
EP
European Patent Office
Prior art keywords
ratchet teeth
prepared hole
internal ratchet
toothed
forging
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP99940509A
Other languages
English (en)
French (fr)
Inventor
Hiroshi Iizuka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IIDZKA Co Ltd
Original Assignee
IIDZKA Co Ltd
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 IIDZKA Co Ltd filed Critical IIDZKA Co Ltd
Publication of EP1038609A1 publication Critical patent/EP1038609A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/28—Making machine elements wheels; discs
    • B21K1/30—Making machine elements wheels; discs with gear-teeth

Definitions

  • the present invention is related to a process of making a latch plate having an internal ratchet teeth.
  • a latch plate 10 employed in a retractable seat belt of an automobile is made to have an internal ratchet teeth 20 .
  • the internal ratchet teeth 20 meshes with a corresponding pawl to lock the seat belt in response to an impact load, the ratchet teeth is required to have a great accuracy with respect to the shape and phase of the teeth.
  • Conventional latch plates 10 are fabricated by a press shaving to have the internal ratchet teeth.
  • the one processed by shaving of a metal plate such as a carbon steel is insufficient in its finished quality as well as the strength. Therefore, it is demanded to provide the latch plate of improved quality.
  • the present invention has been accomplished and has an object of providing a process of making a latch plate capable of easily fabricating the latch plate of high quality.
  • the process in accordance with the present invention is for making a ring-shaped latch plate 10 having an internal ratchet teeth 20 with the use of a punch 30 provided with a toothed forging edge 31 for shaping the internal ratchet teeth and a pilot 32 formed axially forwardly of the toothed forging edge.
  • a prepared hole 12 is formed in a metal plate 11 .
  • the punch 30 is placed to register the pilot 32 with the prepared hole 12 for engaging the toothed forging edge 31 with a peripheral portion 13 of the prepared hole 12 .
  • the toothed forging edge 31 is driven to extrude the peripheral portion 13 by cold-forging in order to shape the internal ratchet teeth 20 around the prepared hole 12 .
  • the internal ratchet teeth 20 is shaped by the cold-forging with the use of the punch 30 provided at its end with the pilot 32 for insertion into the prepared hole 12 and also provided around its periphery with the toothed forging edge 31 , it is possible to make the internal ratchet teeth 20 of high accuracy in a less costly manner as compared to shaping the internal ratchet by cutting. Also, since the internal ratchet teeth is made by the cold-forging, the internal ratchet teeth can be given thickness greater than the thickness of the metal plate for increased strength of the ratchet teeth. Further, by regulating the amount of the cold-extrusion, it is possible to make the ratchet teeth of a desired thickness within an extent of the extrusion amount.
  • the toothed forging edge 31 is driven to extrude the peripheral portion 13 to shape the internal ratchet teeth 20 around the prepared hole 12 , while leaving a thin fin 15 extending along a toothed edge of the internal ratchet teeth 20 in such a manner as to bridge individual teeth 21 of the internal ratchet teeth 20 at one surface of the metal plate, and thereafter the thin fin 15 is removed, a part of the metal plate can be free to escape into the thin fin 15 when cold-forging the metal plate with the punch, making it possible to shape the internal ratchet teeth of improved accuracy as well as to prolong an operating life of a die.
  • the die 40 is prepared to support thereon the peripheral portion 13 of the metal plate 11 around the prepared hole 12 .
  • the die is provided with a cavity 41 which receives the pilot 32 when the punch 30 is driven to shape the internal ratchet teeth 20 .
  • the cavity 41 has an inside diameter slightly larger than that of the pilot to define therebetween a small clearance for allowing a part of the peripheral portion 13 to be extruded into the small clearance, forming thereat a thin burr 16 extending from the thin fin in a thickness direction of the metal plate.
  • a latch plate 10 obtained by the process of the present invention is ring-shaped to have an internal ratchet teeth 20 along an inner periphery of the plate and to have a plurality of mount holes 22 and a plurality of fixed positioning pins 23 .
  • the inner periphery having the ratchet teeth 20 has a thickness T2 greater than a thickness T1 of the outer periphery.
  • the latch plate 10 is made of a metal plate 11 , for example, a carbon steel S45C according to JIS (Japanese Industrial Standards) to have a prepared hole 12 and is press-forged.
  • a forging-press is made of a punch 30 , and a lower die 42 provided with an insert die 40 receiving thereon the periphery 13 of the prepared hole 12 in the metal plate 11 .
  • Formed around the tip of the punch 30 are toothed forging edge 31 for cold extrusion from which an integral pilot 32 projects.
  • the insert die 40 of the lower die 42 is formed with a cavity 41 into which the pilot 31 of the punch 30 fits at the press-forging.
  • FIGS. 2A to 2D and FIG. 3 show steps of the process of making the latch plate 10 .
  • the metal plate 11 is processed to have the prepared hole 12 , as shown in FIG. 2A.
  • the periphery 13 of the prepared hole 12 is processed to protrude on one surface of the plate to form an annular rib 14 , as shown in FIG. 2B.
  • the metal plate 11 is held on the lower die 42 to place the annular rib 13 in correspondence to the upper surface of the insert die 40 .
  • the pilot 32 of the punch 30 is made to project through the prepared hole 12 into the cavity 41 of the insert die 40 .
  • the toothed forging edge 31 gives a plastic deformation to the periphery 13 , whereby the internal ratchet teeth 20 is extruded at the periphery 13 by the cold-forging, as shown in FIG. 2C.
  • the internal ratchet teeth 20 has the thickness T2 which is greater the thickness T1 of the outer periphery of the metal plate 11 and that of the annular rib before the forging.
  • the driving of the punch 30 is limited to such an extent that the axial end of the toothed forging edge 31 reaches away from the upper surface of the insert die 40 . That is, the lowest position of the punch 30 is set to make a small clearance between the axial end of the toothed forging edge 31 and the upper surface of the insert die 40 .
  • the inside diameter of the cavity 41 of the insert die 40 is made slightly smaller than an inscribed circle of the ratchet teeth 20
  • the outside diameter of the pilot 32 is made slightly smaller than the inside diameter of the cavity 41 so as to make a small clearance C between the pilot 32 and the cavity 41 .
  • the internal ratchet teeth 20 formed through the cold-forging extrusion by the teeth 31 of the punch 30 can be accurately shaped free from blurring.
  • the thin fin 15 and the thin burr 16 are formed along the entire periphery of the prepared hole.
  • a knock-out pin 43 raises the insert die 40 and the metal plate 11 held to the punch 30 is removed therefrom by a stripper plate 35 disposed around the punch 30 .
  • a portion of the periphery 13 as shown below a dotted line of FIG. 2C including the thin fin 15 and the thin burr 16 is removed by cutting or press-punching, whereby the ratchet teeth 20 is shaped into a final configuration, as shown in FIG. 2D.
  • the metal plate is concurrently finished to have a desired contour and is press-formed to have the mount holes 22 so as to obtain the latch plate 10 of FIG. 1. It is noted that the tooth face of the internal ratchet teeth 20 can be as it is and require no further polishing or corrections.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Punching Or Piercing (AREA)
  • Gears, Cams (AREA)
EP99940509A 1998-09-17 1999-08-26 Verfahren zur herstellung einer riegelplatte Withdrawn EP1038609A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP26363798 1998-09-17
JP26363798A JP3205730B2 (ja) 1998-09-17 1998-09-17 ラッチプレートの製造法
PCT/JP1999/004623 WO2000016930A1 (fr) 1998-09-17 1999-08-26 Procede de fabrication d'une plaque de verrou

Publications (1)

Publication Number Publication Date
EP1038609A1 true EP1038609A1 (de) 2000-09-27

Family

ID=17392270

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99940509A Withdrawn EP1038609A1 (de) 1998-09-17 1999-08-26 Verfahren zur herstellung einer riegelplatte

Country Status (4)

Country Link
EP (1) EP1038609A1 (de)
JP (1) JP3205730B2 (de)
TW (1) TW452512B (de)
WO (1) WO2000016930A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1297911A2 (de) * 2001-09-28 2003-04-02 Araco Kabushiki Kaisha Verfahren und vorrichtung zum herstellen von geflanschten gegenständen
WO2007004695A1 (en) * 2005-07-01 2007-01-11 Toyota Boshoku Kabushiki Kaisha Methods for manufacturing flanged article
CN104475633A (zh) * 2014-11-19 2015-04-01 塞里姆株式会社 一种钓鱼用绕线轮部件的钓力阀的制造方法及其制造装置
WO2015185191A1 (de) * 2014-06-06 2015-12-10 Trw Automotive Gmbh Rahmenteil für einen gurtaufroller sowie verfahren zur herstellung
DE102018202862A1 (de) * 2018-02-26 2019-08-29 Zf Friedrichshafen Ag Verfahren und Umformstempel zum Herstellen eines im Wesentlichen plattenförmigen Rahmenteils eines Gurtaufrollers sowie Rahmenteil
DE102022130542A1 (de) 2022-11-18 2024-05-23 Autoliv Development Ab Gurtaufroller mit einer Straffeinrichtung

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6255205B2 (ja) * 2013-10-10 2017-12-27 川重商事株式会社 鍛造成形装置
CN104551546B (zh) * 2014-11-19 2017-09-05 塞里姆株式会社 一种钓鱼用绕线轮部件的离合器杆的制造方法及其制造装置
JP6252806B2 (ja) * 2016-03-24 2017-12-27 株式会社飯塚製作所 ロックパウルの製造方法及び非対称部品の製造方法
TWI725833B (zh) * 2020-04-29 2021-04-21 巨騰國際控股有限公司 金屬件沖壓側牆鍛厚製程

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6271068U (de) * 1985-10-24 1987-05-06
JP2581173B2 (ja) * 1988-06-28 1997-02-12 アイシン精機株式会社 歯面取りを有する内スプラインの冷間鍛造方法
JPH0620571B2 (ja) * 1990-01-09 1994-03-23 東洋ファスナー株式会社 ギヤ成形装置
JP2868319B2 (ja) * 1990-12-28 1999-03-10 アイシン精機株式会社 歯面取りを有する内スプライン
JPH0880806A (ja) * 1994-09-13 1996-03-26 Tokai Rika Co Ltd リトラクタ装置
JP3339363B2 (ja) * 1996-11-25 2002-10-28 トヨタ車体株式会社 半抜き成形方法およびこれに使用する冷間鍛造型

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0016930A1 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1297911A2 (de) * 2001-09-28 2003-04-02 Araco Kabushiki Kaisha Verfahren und vorrichtung zum herstellen von geflanschten gegenständen
EP1297911A3 (de) * 2001-09-28 2004-08-04 Araco Kabushiki Kaisha Verfahren und vorrichtung zum herstellen von geflanschten gegenständen
WO2007004695A1 (en) * 2005-07-01 2007-01-11 Toyota Boshoku Kabushiki Kaisha Methods for manufacturing flanged article
CN100594079C (zh) * 2005-07-01 2010-03-17 丰田纺织株式会社 凸缘制品的制造方法
US8113030B2 (en) 2005-07-01 2012-02-14 Toyota Boshoku Kabushiki Kaisha Methods for manufacturing flanged article
WO2015185191A1 (de) * 2014-06-06 2015-12-10 Trw Automotive Gmbh Rahmenteil für einen gurtaufroller sowie verfahren zur herstellung
US10751786B2 (en) 2014-06-06 2020-08-25 Trw Automotive Gmbh Frame component for a belt winder and method for producing same
CN104475633A (zh) * 2014-11-19 2015-04-01 塞里姆株式会社 一种钓鱼用绕线轮部件的钓力阀的制造方法及其制造装置
DE102018202862A1 (de) * 2018-02-26 2019-08-29 Zf Friedrichshafen Ag Verfahren und Umformstempel zum Herstellen eines im Wesentlichen plattenförmigen Rahmenteils eines Gurtaufrollers sowie Rahmenteil
DE102022130542A1 (de) 2022-11-18 2024-05-23 Autoliv Development Ab Gurtaufroller mit einer Straffeinrichtung

Also Published As

Publication number Publication date
WO2000016930A1 (fr) 2000-03-30
JP3205730B2 (ja) 2001-09-04
JP2000094083A (ja) 2000-04-04
TW452512B (en) 2001-09-01

Similar Documents

Publication Publication Date Title
EP1038609A1 (de) Verfahren zur herstellung einer riegelplatte
JP3389593B2 (ja) クラッチドラムの製造方法および歯形成形装置
JP4962891B2 (ja) 縦溝を有するナットの製造方法
JP2005118789A (ja) ボス付き歯車状部材の成形方法及びボス付き歯車状部材
EP0277269B1 (de) Verfahren zur Herstellung eines ein Zahnprofil und eine Nabe aufweisenden Werkstückes
JP3393448B2 (ja) 板金プレートのリングギア成形方法
JP2885266B2 (ja) 板金製歯形部品の成形方法
JPH0580296B2 (de)
JP3637249B2 (ja) 外径側球面形状リングの製造方法
US6142004A (en) Load-bearing shaped part and a method for manufacturing shaped parts
JP2851591B2 (ja) 歯車製造用の圧造工具セット
JP2825793B2 (ja) 歯車の圧造成形方法及び圧造用ダイセット
JP4217691B2 (ja) 円筒状部品の製造方法
CN112916789B (zh) 一种内齿形的净成形工艺方法
JP2000140976A (ja) 部品の製造方法
JP3513818B2 (ja) 座金付きナットの製造方法
JP2825798B2 (ja) 歯車の鍛造・圧造成形方法及びダイセット
JP3746828B2 (ja) 円筒状部品の製造方法
JP2006289374A (ja) 冷間鍛造方法およびその粗形材
JPH08112640A (ja) 軽合金製ホイール用ワンピースリムの製造方法
JPH10146642A (ja) リングギヤの製造方法
JP2007059365A (ja) スパークプラグシェル及びその製造方法
JP4234224B2 (ja) 自動車のステアリングメインシャフトの溝加工方法および製造方法
JPH11290985A (ja) ボルト素形材の製造方法
JPH0120042Y2 (de)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20000516

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20020301

RBV Designated contracting states (corrected)

Designated state(s): CH DE IT LI SE