EP1736255B1 - Molding method by forging and molding method for case - Google Patents
Molding method by forging and molding method for case Download PDFInfo
- Publication number
- EP1736255B1 EP1736255B1 EP04728001A EP04728001A EP1736255B1 EP 1736255 B1 EP1736255 B1 EP 1736255B1 EP 04728001 A EP04728001 A EP 04728001A EP 04728001 A EP04728001 A EP 04728001A EP 1736255 B1 EP1736255 B1 EP 1736255B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- boss
- case
- forming
- peripheral wall
- intermediate product
- 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.)
- Expired - Fee Related
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
- B21K21/00—Making hollow articles not covered by a single preceding sub-group
- B21K21/02—Producing blanks in the shape of discs or cups as semifinished articles for making hollow articles, e.g. to be deep-drawn or extruded
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
-
- 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
-
- 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
-
- 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
- B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
-
- 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
- B21K21/00—Making hollow articles not covered by a single preceding sub-group
Definitions
- the present invention relates to a method of forming by forging and a case forming method.
- cup-shaped cases with a boss provided on the inside are widely employed in various fields.
- the case of the electromagnetically controlled valve of an injection apparatus used to supply fuel to the cylinders in an internal combustion engine is a cup-shaped member with an integrally formed inside boss for affixing the electromagnetic coil and the magnetic core.
- Cup-shaped cases such as these having an inside boss are also usually formed by forging, for cost reasons, and in the intermediate product form require the formation of overlays on the plate core material.
- BE 526009 relates to a method for manufacture of cup-like parts by deep-drawing based of a cylindrical bar and products obtained by this method.
- Japanese Unexamined Patent Application publication No. 2000-94088 discloses a method of forming a cup with an inside boss in which the material is obtained by spheroidizing annealing a forged slab and subjecting the material to shot bonderizing treatment. Because the method includes the step of cutting round steel bar, it endeavors to reduce the cutting cost by using round bar having a relatively small diameter, and gives the material a thick configuration suitable for forming a cup having an internal boss by forging the cut sections of round bar. To eliminate such tasks, there is also known a method of forming a case having an internal boss by preparing and forging a flat steel slab.
- An object of the invention is to provide a method of forming by forging and a case forming method capable of overcoming the aforesaid problems of the prior art.
- An object of the invention is to provide a method of forming for manufacturing a high-quality case by blanking of sheet material.
- Another object of the invention is to provide a case forming method capable of manufacturing high-quality cases at low cost.
- Figures 1 to 5 are process ironings for explaining an embodiment of method of the invention, applied to the manufacture of the case of an electromagnetically controlled valve of a fuel injection apparatus used to supply fuel to an internal combustion engine.
- the sheet member shown in Figure 1 is prepared as material 1.
- the material 1 can be obtained by, for example, by blanking and stamping low-carbon steel sheet.
- material 1 is a disk-shaped member, but it does not have to be disk-shaped.
- the intermediate formed product 2 shown in Figure 2 has a circumferential thin annular portion 21, a thick portion 22 on the inside of the thin annular portion 21 that is thicker than the thin annular portion 21, and a concave portion 22A on the center portion of the thick portion 22.
- the thick portion 22 is formed into at least the case bottom and internal boss, so it is thickened to allow for at least the amount of material for the internal boss formed integrally with the bottom.
- the first intermediate formed product 2 it is preferable for the first intermediate formed product 2 to be annealed to prevent cracking occurring in the subsequent process steps.
- the first intermediate formed product 2 is stamping-formed to form the thick portion 22 into a bottom 32 and the thin annular portion 21 into a peripheral wall 31 that extends integrally from the bottom 32, thereby forming a second intermediate formed product 3 shaped as shown in Figure 3 .
- the second intermediate formed product 3 of Figure 3 can readily be obtained by the drawing and ironing process.
- drawing and ironing are used to slightly thicken the outer edge 31 A of the peripheral wall 31, giving the wall 31 a skirt-like shape.
- the thickness of the peripheral wall 31 is less than the thickness of the bottom 32. If an external flange is not needed, it is not necessary to thicken the outer edge 31A.
- the case 5 having an internal boss shown in Figure 5 .
- the bottom 52 and peripheral wall 51 are approximately the same thickness and the internal boss 53 and external boss 54 on the bottom 52 are coaxial.
- the internal boss 53 is provided in order to incorporate an electromagnetic solenoid, and the external boss 54 is provided to accommodate a bearing.
- An external flange 51A on the outside edge of the peripheral wall 51 extends integrally at a right-angle to the peripheral wall 51.
- the first intermediate formed product 2 shown in Figure 2 is a general-purpose member.
- the first intermediate formed product 2 can be used as an intermediate product in the manufacturing of, for example, sprockets, gears, pulleys, cams, links and fixing brackets.
- the first intermediate formed product 2 is prepared and subjected to forward/backward drawing forging steps whereby the thick center portion of the first intermediate formed product 2 is formed into a boss 61 and the thin portion is formed into a thin annular portion 62 having a uniform thickness.
- the boss 61 is cup-shaped, formed as a cylinder with a bottom.
- the intermediate formed product in Figure 6 is stamped to remove the bottom 61A of the boss 61, forming the cylindrical boss 63 shown in Figure 7 .
- the steps of using the first intermediate formed product 2 of Figure 2 to manufacture a pulley will now be described with reference to Figures 9 to 11 .
- the first intermediate formed product 2 is prepared and stamped to increase the thickness of the peripheral edge of the thin portion, thereby forming the outer ring 71 shown in Figure 9 .
- the outer ring 71 After forming the outer ring 71, forward/backward drawing forging steps are used whereby the thick center portion is formed into a boss 72 and a thin annular portion 73 having a uniform thickness is formed between the outer ring 71 and the boss 72 ( Figure 10 ).
- the boss 72 is cup-shaped, formed as a cylinder with a bottom, and the outer ring 71 is formed to have the required dimensions for outer ring 74.
- a pulley 7 is obtained comprising the boss 75 and the outer ring 74 integrated by the thin annular portion 73 of uniform thickness.
- a groove may be formed on the outer ring 74 by machining or the like.
- the method of forming by forging and a case forming method according to the invention is useful for the low-cost fabrication of parts such as sprockets, gears, pulleys, cams and fixing brackets, and for the low-cost, high-quality manufacture of cup-shaped cases with an internal boss.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Gears, Cams (AREA)
- Pulleys (AREA)
Abstract
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2004/005443 WO2005099929A1 (ja) | 2004-04-16 | 2004-04-16 | 鍛造による成形方法及びケースの成形方法 |
Publications (4)
Publication Number | Publication Date |
---|---|
EP1736255A1 EP1736255A1 (en) | 2006-12-27 |
EP1736255A4 EP1736255A4 (en) | 2007-05-02 |
EP1736255A8 EP1736255A8 (en) | 2007-06-20 |
EP1736255B1 true EP1736255B1 (en) | 2010-11-24 |
Family
ID=35149824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04728001A Expired - Fee Related EP1736255B1 (en) | 2004-04-16 | 2004-04-16 | Molding method by forging and molding method for case |
Country Status (6)
Country | Link |
---|---|
US (1) | US20070006628A1 (ja) |
EP (1) | EP1736255B1 (ja) |
JP (1) | JPWO2005099929A1 (ja) |
CN (1) | CN1784278A (ja) |
DE (1) | DE602004030279D1 (ja) |
WO (1) | WO2005099929A1 (ja) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100709458B1 (ko) * | 2006-05-17 | 2007-04-18 | 주식회사 영진전기 | 휴대폰용 카메라모듈커버의 성형방법 |
US8261592B2 (en) * | 2007-04-19 | 2012-09-11 | Indimet Inc. | Method of providing a solenoid housing |
US9636741B2 (en) * | 2007-04-19 | 2017-05-02 | Indimet, Inc. | Solenoid housing and method of providing a solenoid housing |
JP4943374B2 (ja) * | 2008-05-16 | 2012-05-30 | 茨城スチールセンター株式会社 | 自動車変速機用ピストンのバネ座止まり穴加工方法 |
JP5383362B2 (ja) * | 2009-07-24 | 2014-01-08 | キヤノン株式会社 | 金属部材の製造方法 |
JP5609455B2 (ja) * | 2010-09-10 | 2014-10-22 | トヨタ自動車株式会社 | 鍛造方法 |
WO2012046678A1 (ja) * | 2010-10-06 | 2012-04-12 | 日本化薬株式会社 | ガス発生器、ガス発生器用ホルダおよびガス発生器用ホルダの製造方法 |
CN102554084A (zh) * | 2010-12-10 | 2012-07-11 | 上海重型机器厂有限公司 | 第三代核电站蒸汽发生器水室封头的锻造方法 |
US8643452B2 (en) * | 2011-04-07 | 2014-02-04 | Indimet Inc. | Solenoid housing with elongated center pole |
CN102554114A (zh) * | 2012-01-06 | 2012-07-11 | 山东伊莱特重工有限公司 | 一种大型风电机组用轴承环件锻造碾环加工方法 |
CN103386585B (zh) * | 2012-05-10 | 2016-01-20 | 昆山永年先进制造技术有限公司 | 壳台或管台成形工艺及其所用的反挤压模 |
CN103143628A (zh) * | 2013-03-04 | 2013-06-12 | 江苏泽恩汽机车部品制造有限公司 | 分步骤厚壁拉伸成型模具 |
CN104107871B (zh) * | 2013-04-19 | 2016-04-27 | 宝钢特钢有限公司 | 以镦抛结合平砧旋转锻边方式锻造大型饼件的方法 |
DE102013011951A1 (de) * | 2013-07-18 | 2015-01-22 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Verfahren zum Fertigen von Kraftfahrzeug-Karosserieteilen |
CN106102948B (zh) * | 2014-03-28 | 2018-01-26 | 新日铁住金株式会社 | 具有多个增厚部分的板状成型体的制造方法及具有多个增厚部的板状成型体 |
DE102016205492A1 (de) * | 2016-04-04 | 2017-10-05 | Thyssenkrupp Ag | Verfahren und Vorrichtung zum Umformen eines Halbzeugs |
CN105728607A (zh) * | 2016-04-19 | 2016-07-06 | 贵州航天新力铸锻有限责任公司 | 大型双耳u形锻件成型用的坯料 |
JP6197136B1 (ja) * | 2017-04-03 | 2017-09-13 | マテック株式会社 | カップ構造体の製造方法 |
CN107695276A (zh) * | 2017-11-08 | 2018-02-16 | 浙江申吉钛业股份有限公司 | 带球形法兰芯轴类零件新的制造工艺和模具 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE526009A (ja) * | ||||
DE932217C (de) * | 1942-05-05 | 1955-08-25 | Karlsruhe Augsburg Iweka | Verfahren zur Herstellung von Naepfchen als Vorwerkstuecke fuer die Fertigung von metallischen Hohlkoerpern |
DE858189C (de) * | 1943-01-29 | 1952-12-04 | Otto Dr-Ing May | Verfahren zur Herstellung von Naepfen fuer huelsenfoermige Hohlkoerper |
DE1001095B (de) * | 1953-06-19 | 1957-01-17 | Nagel Hans Joachim | Verfahren zum Herstellen zylindrischer Metall-Hohlkoerper |
JPS57175045A (en) * | 1981-04-21 | 1982-10-27 | Yoshiichi Sakamura | Heading method for obtaining 2 ring bodies |
US5343729A (en) * | 1985-03-15 | 1994-09-06 | Weirton Steel Corporation | Fabricating one-piece can bodies with controlled side wall elongation |
JP2549535B2 (ja) * | 1987-11-13 | 1996-10-30 | 株式会社杉浦製作所 | プロジェクションナットの製造方法およびプロジェクションナット用鍛造型 |
JPH01205844A (ja) * | 1988-02-10 | 1989-08-18 | Fuji Tool & Die Co Ltd | フランジコンパニオンの冷鍛加工成形方法 |
JP3298394B2 (ja) * | 1995-12-25 | 2002-07-02 | 旭精機工業株式会社 | 圧電振動子用容器の製造方法 |
JP2926217B2 (ja) * | 1996-02-26 | 1999-07-28 | 株式会社平安製作所 | 被扱き面を有する加工素材 |
JP3826486B2 (ja) * | 1997-04-25 | 2006-09-27 | 株式会社アルファ | 鍛造方法並びに鍛造装置 |
JP3495225B2 (ja) * | 1997-06-25 | 2004-02-09 | サンデン株式会社 | 斜板式圧縮機用シューの製造方法 |
JP3211157B2 (ja) * | 1997-12-22 | 2001-09-25 | 株式会社フジユニバンス | ベルト式無段変速機のスライドプーリー及びその製造方法 |
JP3443528B2 (ja) * | 1998-08-28 | 2003-09-02 | 日本高周波鋼業株式会社 | 段付及び鍔付環状部材の製造方法 |
JP2001284416A (ja) * | 2000-03-30 | 2001-10-12 | Nagase & Co Ltd | 低温試験装置 |
-
2004
- 2004-04-16 US US10/542,686 patent/US20070006628A1/en not_active Abandoned
- 2004-04-16 CN CNA2004800016907A patent/CN1784278A/zh active Pending
- 2004-04-16 WO PCT/JP2004/005443 patent/WO2005099929A1/ja not_active Application Discontinuation
- 2004-04-16 EP EP04728001A patent/EP1736255B1/en not_active Expired - Fee Related
- 2004-04-16 JP JP2006519123A patent/JPWO2005099929A1/ja active Pending
- 2004-04-16 DE DE602004030279T patent/DE602004030279D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
WO2005099929A8 (ja) | 2007-04-12 |
WO2005099929A1 (ja) | 2005-10-27 |
EP1736255A1 (en) | 2006-12-27 |
JPWO2005099929A1 (ja) | 2007-08-16 |
US20070006628A1 (en) | 2007-01-11 |
EP1736255A4 (en) | 2007-05-02 |
EP1736255A8 (en) | 2007-06-20 |
DE602004030279D1 (de) | 2011-01-05 |
CN1784278A (zh) | 2006-06-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1736255B1 (en) | Molding method by forging and molding method for case | |
US8864612B2 (en) | Cam sprocket and method for manufacturing the same | |
US8424407B2 (en) | Core metal and injection gear, and process for manufacturing core metal | |
EP0453167A1 (en) | Method of manufacturing outside ring | |
KR20070038443A (ko) | 환형부품 제조방법, 이 제조방법에서 이용되는 다이, 및이에 의해 제조된 환형부품 | |
EP3003596B1 (en) | Method of manufacturing metal core for resin gear | |
US20050284203A1 (en) | Pressed work and manufacturing method thereof | |
EP1038609A1 (en) | Method of manufacturing latch plate | |
JP2002346690A (ja) | 金属部品の鍛造成形方法 | |
JPH049243A (ja) | 回転体の製造方法 | |
US11446729B2 (en) | Method for the production of an internal stop in a tubular component | |
JP3614244B2 (ja) | 金属カップ体のテーパ周面形成方法 | |
US20140008287A1 (en) | Injector filter and method of manufacturing the same | |
CN108025350B (zh) | 板金制部件的制造方法 | |
JP4415902B2 (ja) | 燃料インジェクター用ホルダー及びその製造方法 | |
JP4226465B2 (ja) | 内ボス付カップ状ケースの成形方法 | |
KR100357977B1 (ko) | 자동차오토트랜스미션용 솔레노이드밸브의 코어성형방법 | |
KR20060060739A (ko) | 단조에 의한 성형 방법 및 케이스의 성형 방법 | |
JPH0788582A (ja) | 板金プレートのリングギア成形方法 | |
JPH0755346B2 (ja) | 自動車構成部品の製造方法 | |
JPH061970B2 (ja) | ヨ−クの製造方法 | |
KR101736837B1 (ko) | 차량용 자동 변속기의 오버드라이버 허브 클러치 제조방법 | |
JP3746828B2 (ja) | 円筒状部品の製造方法 | |
JP2802261B2 (ja) | 二重筒状体の製造方法およびその装置 | |
JP2003230932A (ja) | 鍛造品の打ち抜き方法及びその装置 |
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: 20050608 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 20070403 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: B21K 21/02 20060101AFI20070328BHEP |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: YANAOKA, SHOICHI,C/O NIMOMIYA CO., LTD. Inventor name: KOUNO, SHINJI,C/O BOSCH AUTOMOTIVE SYSTEMS CORPORA Inventor name: ARAKI, TAKASHI,C/O BOSCH AUTOMOTIVE SYSTEMS CORPOR Inventor name: TABEI, YOUICHI,C/O BOSCH AUTOMOTIVE SYSTEMS CORPOR Inventor name: MIURA, TAKASHI,C/O NIMOMIYA CO., LTD. |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20070810 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): DE FR GB |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REF | Corresponds to: |
Ref document number: 602004030279 Country of ref document: DE Date of ref document: 20110105 Kind code of ref document: P |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20110825 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602004030279 Country of ref document: DE Effective date: 20110825 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20150624 Year of fee payment: 12 Ref country code: GB Payment date: 20150423 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20150422 Year of fee payment: 12 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 602004030279 Country of ref document: DE |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20160416 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20161230 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20160416 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20161101 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20160502 |