WO2000016930A1 - Procede de fabrication d'une plaque de verrou - Google Patents

Procede de fabrication d'une plaque de verrou Download PDF

Info

Publication number
WO2000016930A1
WO2000016930A1 PCT/JP1999/004623 JP9904623W WO0016930A1 WO 2000016930 A1 WO2000016930 A1 WO 2000016930A1 JP 9904623 W JP9904623 W JP 9904623W WO 0016930 A1 WO0016930 A1 WO 0016930A1
Authority
WO
WIPO (PCT)
Prior art keywords
ratchet teeth
inner ratchet
pilot hole
metal plate
punch
Prior art date
Application number
PCT/JP1999/004623
Other languages
English (en)
Japanese (ja)
Inventor
Hiroshi Iizuka
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.
Priority to EP99940509A priority Critical patent/EP1038609A1/fr
Publication of WO2000016930A1 publication Critical patent/WO2000016930A1/fr

Links

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 relates to a method for manufacturing a latch plate having internal ratchet teeth.
  • the latch plate 10 used for the retractable seatbelt mechanism of the automobile has inner ratchet teeth 20, but the inner ratchet teeth 20 receive an impact load.
  • the inner ratchet teeth 20 are required to have high precision in shape and phase because they are engaged with the corresponding claws to be used for locking the seat belt.
  • the inner ratchet teeth 20 are formed by shaping with a press.
  • the present invention has been made in view of such a point, and an object of the present invention is to provide a method of manufacturing a latch plate which can easily manufacture a high-quality latch plate.
  • the ring-shaped metal latch plate 10 having the inner ratchet teeth 20 on the inner periphery is provided on the forging toothed edge 31 for forming the inner ratchet teeth and at the axial end thereof. It is manufactured by using a punch 30 provided with a pilot 32. First, a pilot hole 12 is formed in a metal plate 11 and then the punch 30 is arranged to form the pilot 32. Matches above prepared holes 1 and 2 Then, the forged toothed edge 31 is engaged with the peripheral edge 13 of the prepared hole 12, and then the forged toothed edge 31 is driven into the peripheral edge 13 by cold forging. Extrude to form the inner ratchet teeth 20 around the pilot hole 12.
  • the pilot 32 is provided at the tip through the pilot hole 12, and is extruded by cold forging using the punch 30 having the forging toothed edge 31 on the outer peripheral surface. Since the inner ratchet teeth 20 are formed, a high-precision one can be obtained at a lower cost than in the case where the inner ratchet teeth are formed by cutting or the like, and the inner ratchet is formed by cold forging extrusion. In order to form the teeth, the inner ratchet teeth can be given a thickness greater than the thickness of the metal plate, so that the strength of the inner ratchet gear can be increased. In addition, by adjusting the amount of cold extrusion, it is possible to obtain inner ratchet teeth of any thickness within the range of the amount of extrusion.
  • the forging toothed edge 31 is driven in, and the peripheral portion 13 is extruded by cold forging to form the inner ratchet teeth 20 around the pilot hole 12 and at the same time, along the inner ratchet teeth. If the thin fins 15 extending from one side of the metal plate are left so as to connect between the teeth 21 of the ratchet teeth 20 and the thin fins 15 are subsequently removed, the punch A part of the metal plate can escape to the thin fins 15 during the cold forging extrusion, and the inner ratchet teeth with higher precision can be reliably formed, and the life of the mold can be extended. .
  • a mold 40 is provided on the upper surface for receiving the peripheral edge 13 of the pilot hole 12 in the metal plate 11.
  • the mold 40 is provided with the above-mentioned inner ratchet teeth 20 for forming the inner ratchet teeth 20.
  • a mold hole 41 is provided for receiving the pilot 32 when the punch 30 is driven.
  • the inner diameter of the mold hole 41 is slightly larger than the diameter of the pipe mouth, and a minute clearance C is formed therebetween, so that the peripheral portion 13 Can be extruded into the minute clearance C to form a thin burr 16 extending from the thin fin 15 in the thickness direction of the metal plate. If 16 is subsequently removed together with the thin fins 15, a more accurate inner ratchet tooth can be obtained by allowing a part of the metal plate to escape to the small clearance C during cold forging extrusion by punching. You can really get it.
  • FIG. 1 is a plan view of a latch plate obtained by the manufacturing method of the present invention.
  • 2A to 2D are cross-sectional views showing the steps of the manufacturing method of the present invention.
  • FIG. 3 is a schematic cross-sectional view showing a punch and a die used in the method for manufacturing a latch plate of the present invention.
  • FIG. 4 is a perspective view showing the latch plate during the same manufacturing process.
  • a latch plate 10 to be obtained by a manufacturing method according to the present invention has inner ratchet teeth 20 on an inner peripheral surface as shown in FIG.
  • a plurality of mounting holes 22 are formed in an outer peripheral portion of the ring-shaped member, and a plurality of positioning pins 23 are fixed to the ring.
  • the thickness T2 of the inner peripheral portion is larger than the thickness T1 of the outer peripheral portion.
  • the latch plate 10 is formed by, for example, providing a prepared hole 12 in a metal plate 11 made of JIS standard S45C carbon steel and forging and pressing it.
  • this forging press is composed of a punch 30 and a lower die 42 having an insert die 40 for receiving a peripheral portion 13 of a prepared hole 12 of a metal plate 11. .
  • the outer periphery of the tip of the punch 30 is provided with a toothed edge 31 for cold forging extrusion.
  • the pilot 32 protrudes into the body from the tip.
  • the insert mold 40 in the lower mold 42 has a mold hole 41 into which the pie mouth 31 of the punch 30 is fitted during forging press.
  • FIG. 3 show steps of a method for manufacturing the latch plate 20.
  • the pilot hole 12 is formed in the flat metal plate 11 as shown in Fig. 2A
  • the peripheral part 13 of the pilot hole 12 is protruded to one side as shown in Fig. 2B to form a ring.
  • Form ribs 14 Thereafter, as shown in FIG. 3, the metal plate 11 is placed on the lower mold 42 and the annular rib 14 is made to correspond to the upper surface of the insert mold 40.
  • the pilot 32 of the punch 30 is made to protrude through the pilot hole 12 into the mold hole 41 of the insert mold 40, and the punch 30 is driven into the toothed edge 31 so that the peripheral edge 13 is formed.
  • plastic deformation as shown in FIG.
  • the inner ratchet teeth 20 are extruded on the peripheral part 13 by cold forging.
  • the peripheral portion 13 where the inner ratchet teeth 20 are formed is mainly plastically deformed in the thickness direction of the metal plate 11 so that the thickness T2 of the inner ratchet teeth 20 before the forging is obtained.
  • the thickness is larger than the thickness T 1 of the annular rib and the outer peripheral portion of the metal plate 11.
  • the driving amount of the punch 30 is set before the axial end of the toothed edge 31 reaches the upper surface of the insert mold 40. That is, the position where the punch 30 is lowered most is set such that a minute clearance is generated between the upper surface of the insert mold 40 and the axial end of the toothed edge 31 of the punch 30.
  • a part of the peripheral portion 13 has a minute clearance.
  • the thin fins 15 over the entire circumference of the cutting edge of the inner ratchet teeth 20 are left on one side of the metal plate 11 so as to connect between the teeth 21 of the inner ratchet teeth 20. .
  • the inner diameter of the mold hole 41 of the insert mold 40 is While making it slightly smaller than the inner diameter of the tangent circle and making the outer diameter of the pilot 32 slightly smaller than the inner diameter of the mold hole 41, a small clearance C is created between the outer surface of the pilot 32 and the inner surface of the mold hole 41. I have to. For this reason, when the inner ratchet teeth 20 are formed by performing cold forging of the peripheral portion 13 with the punch 30, a part of the peripheral portion also escapes to this minute clearance, and as shown in FIG. As shown in FIG. 4, the thin fins 16 that hang down continuously from the inner peripheral edge of the thin fins 15 are formed.
  • the formation of the inner ratchet teeth 20 in the cold forging extrusion by the teeth 31 of the punch 30 can be performed precisely without dripping.
  • the insert mold 40 is pushed up by the knockout pins 43, and the metal plate 11 attached to the punch 30 is placed around the punch 30. It is removed from the punch by the stripper plate 35 arranged.
  • the peripheral portion 13 including the thin fins 15 and the thin burrs 16 below the broken line shown in Fig. 2C is punched by cutting or pressing.
  • the inner ratchet teeth 20 are finished to the final shape as shown in FIG. 2D.
  • the latch plate 10 shown in FIG. 1 is obtained by adjusting the outer shape of the metal plate 11 or performing press forming for forming the mounting hole 22.
  • the tooth surface of the inner ratchet tooth 20 may be basically the same as that at the time of performing the cold forging extrusion described above, and it is not necessary to correct the tooth surface by grinding.
  • the outer shape, the mounting holes 22 and the positioning pins 23 with respect to the inner ratchet teeth 20 are used as a reference. It is preferable to form them simultaneously.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Punching Or Piercing (AREA)
  • Gears, Cams (AREA)

Abstract

L'invention concerne un procédé de fabrication d'une plaque métallique annulaire (11) de verrou, présentant des dents triangulaires intérieures (20) sur sa surface périphérique interne, au moyen d'un poinçon (30), lequel comprend un bord d'estampage denté (31), destiné à former les dents triangulaires intérieures de la plaque, ainsi qu'une partie pilote (32) située au niveau du côté antérieur axial du bordu poinçon. Ce procédé comprend les étapes suivantes consistant à former d'abord un trou préparé (12) dans la plaque métallique (11), à placer le poinçon (30) de manière à aligner la partie pilote (32) sur le trou préparé (12), afin que le bord d'estampage denté (31) entre en contact avec le bord périphérique (13) du trou (12), et à entraîner ce bord d'estampage denté (31) de façon à extruder par forgeage à froid le bord périphérique (13) et former ainsi les dents triangulaires intérieures (20) autour de la périphérie du trou préparé.
PCT/JP1999/004623 1998-09-17 1999-08-26 Procede de fabrication d'une plaque de verrou WO2000016930A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99940509A EP1038609A1 (fr) 1998-09-17 1999-08-26 Procede de fabrication d'une plaque de verrou

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP26363798A JP3205730B2 (ja) 1998-09-17 1998-09-17 ラッチプレートの製造法
JP10/263637 1998-09-17

Publications (1)

Publication Number Publication Date
WO2000016930A1 true WO2000016930A1 (fr) 2000-03-30

Family

ID=17392270

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1999/004623 WO2000016930A1 (fr) 1998-09-17 1999-08-26 Procede de fabrication d'une plaque de verrou

Country Status (4)

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

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4433649B2 (ja) * 2001-09-28 2010-03-17 トヨタ紡織株式会社 フランジを備えた製品の成形方法
JP4735380B2 (ja) * 2005-07-01 2011-07-27 トヨタ紡織株式会社 ワークの製造方法
JP6255205B2 (ja) * 2013-10-10 2017-12-27 川重商事株式会社 鍛造成形装置
DE102014008139A1 (de) 2014-06-06 2015-12-17 Trw Automotive Gmbh Rahmenteil für einen Gurtaufroller sowie Verfahren zur Herstellung
CN104475633B (zh) * 2014-11-19 2017-04-12 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
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
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
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
DE102022130542A1 (de) 2022-11-18 2024-05-23 Autoliv Development Ab Gurtaufroller mit einer Straffeinrichtung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6271068U (fr) * 1985-10-24 1987-05-06
JPH0211241A (ja) * 1988-06-28 1990-01-16 Aisin Seiki Co Ltd 歯面取りを有する内スプラインの冷間鍛造方法
JPH03207546A (ja) * 1990-01-09 1991-09-10 Toyo Fastener Kk ギヤ成形装置
JPH04313442A (ja) * 1990-12-28 1992-11-05 Aisin Seiki Co Ltd 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
JPH10202329A (ja) * 1996-11-25 1998-08-04 Toyota Auto Body Co Ltd 半抜き成形方法およびこれに使用する冷間鍛造型

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6271068U (fr) * 1985-10-24 1987-05-06
JPH0211241A (ja) * 1988-06-28 1990-01-16 Aisin Seiki Co Ltd 歯面取りを有する内スプラインの冷間鍛造方法
JPH03207546A (ja) * 1990-01-09 1991-09-10 Toyo Fastener Kk ギヤ成形装置
JPH04313442A (ja) * 1990-12-28 1992-11-05 Aisin Seiki Co Ltd 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
JPH10202329A (ja) * 1996-11-25 1998-08-04 Toyota Auto Body Co Ltd 半抜き成形方法およびこれに使用する冷間鍛造型

Also Published As

Publication number Publication date
TW452512B (en) 2001-09-01
JP2000094083A (ja) 2000-04-04
JP3205730B2 (ja) 2001-09-04
EP1038609A1 (fr) 2000-09-27

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