EP1736255A1 - Formverfahren durch schmieden und formverfahren für gehäuse - Google Patents

Formverfahren durch schmieden und formverfahren für gehäuse Download PDF

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Publication number
EP1736255A1
EP1736255A1 EP04728001A EP04728001A EP1736255A1 EP 1736255 A1 EP1736255 A1 EP 1736255A1 EP 04728001 A EP04728001 A EP 04728001A EP 04728001 A EP04728001 A EP 04728001A EP 1736255 A1 EP1736255 A1 EP 1736255A1
Authority
EP
European Patent Office
Prior art keywords
forming
case
boss
thickness
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.)
Granted
Application number
EP04728001A
Other languages
English (en)
French (fr)
Other versions
EP1736255B1 (de
EP1736255A4 (de
EP1736255A8 (de
Inventor
Youichi c/o Bosch Automotive Systems Corp. TABEI
Takashi c/o Bosch Automotive Systems Corp. ARAKI
Shinji c/o Bosch Automotive Systems Corpor. KONO
Shoichi Yanaoka
Takashi Miura
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.)
Ninomiya Co Ltd
Bosch Corp
Original Assignee
Ninomiya Co Ltd
Bosch Automotive Systems Corp
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 Ninomiya Co Ltd, Bosch Automotive Systems Corp filed Critical Ninomiya Co Ltd
Publication of EP1736255A1 publication Critical patent/EP1736255A1/de
Publication of EP1736255A4 publication Critical patent/EP1736255A4/de
Publication of EP1736255A8 publication Critical patent/EP1736255A8/de
Application granted granted Critical
Publication of EP1736255B1 publication Critical patent/EP1736255B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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.
  • 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.
  • a characterizing feature of the invention is that the method of forming by forging material comprises a first step of preparing sheet material, and a second step in which a thickness of a circumferential portion of the material is made thinner than a thickness of a center portion of the material.
  • the case forming method comprises a first step of preparing the sheet material, and a second step in which a thickness of a circumferential portion of the material is formed to be thinner than a thickness of a center portion of the material.
  • the method of forming a cup-shaped case having an internal boss comprises a step of preparing sheet material, a step of forming a circumferential portion of the material to be thinner than a thickness of a center portion of the material while simultaneously time stamping-forming the thicker center portion into a concave shape, and a step of using forward drawing to stamping-form the intermediate product formed by the above stamping-forming into a cup-shaped member having a bottom that is thicker than the peripheral wall.
  • 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. Since the first intermediate formed product 2 has the concave portion 22A in the center thereof, 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 31A 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 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 steps of using the first intermediate formed product 2 of Figure 2 to manufacture a gear will now be described with reference to Figures 6 to 8.
  • 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.
  • first intermediate formed product 2 of Figure 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)
EP04728001A 2004-04-16 2004-04-16 Formverfahren durch schmieden und formverfahren für gehäuse Expired - Fee Related EP1736255B1 (de)

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 true EP1736255A1 (de) 2006-12-27
EP1736255A4 EP1736255A4 (de) 2007-05-02
EP1736255A8 EP1736255A8 (de) 2007-06-20
EP1736255B1 EP1736255B1 (de) 2010-11-24

Family

ID=35149824

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04728001A Expired - Fee Related EP1736255B1 (de) 2004-04-16 2004-04-16 Formverfahren durch schmieden und formverfahren für gehäuse

Country Status (6)

Country Link
US (1) US20070006628A1 (de)
EP (1) EP1736255B1 (de)
JP (1) JPWO2005099929A1 (de)
CN (1) CN1784278A (de)
DE (1) DE602004030279D1 (de)
WO (1) WO2005099929A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
EP2626256A1 (de) * 2010-10-06 2013-08-14 Nippon Kayaku Kabushiki Kaisha Gasgenerator, halter für einen gasgenerator sowie verfahren zur herstellung des halters für einen gasgenerator
EP2136940A4 (de) * 2007-04-19 2015-12-02 Indimet Inc Verfahren zur bereitstellung eines elektromagnetgehäuses

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100709458B1 (ko) * 2006-05-17 2007-04-18 주식회사 영진전기 휴대폰용 카메라모듈커버의 성형방법
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
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
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
MX2016009371A (es) 2014-03-28 2016-10-13 Nippon Steel & Sumitomo Metal Corp Metodo para manufacturar un componente formado en forma de lamina teniendo multiples secciones de grosor incrementado, y componente formado en forma de lamina teniendo multiples secciones de grosor incrementado.
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

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BE526009A (de) *
DE858189C (de) * 1943-01-29 1952-12-04 Otto Dr-Ing May Verfahren zur Herstellung von Naepfen fuer huelsenfoermige Hohlkoerper
DE932217C (de) * 1942-05-05 1955-08-25 Karlsruhe Augsburg Iweka Verfahren zur Herstellung von Naepfchen als Vorwerkstuecke fuer die Fertigung von metallischen Hohlkoerpern
DE1001095B (de) * 1953-06-19 1957-01-17 Nagel Hans Joachim Verfahren zum Herstellen zylindrischer Metall-Hohlkoerper

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BE526009A (de) *
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

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See also references of WO2005099929A1 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2136940A4 (de) * 2007-04-19 2015-12-02 Indimet Inc Verfahren zur bereitstellung eines elektromagnetgehäuses
EP2626256A1 (de) * 2010-10-06 2013-08-14 Nippon Kayaku Kabushiki Kaisha Gasgenerator, halter für einen gasgenerator sowie verfahren zur herstellung des halters für einen gasgenerator
EP2626256A4 (de) * 2010-10-06 2014-03-12 Nippon Kayaku Kk Gasgenerator, halter für einen gasgenerator sowie verfahren zur herstellung des halters für einen gasgenerator
US9079808B2 (en) 2010-10-06 2015-07-14 Nippon Kayaku Kabushiki Kaisha Gas generator, gas generator holder and method for manufacturing gas generator holder
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

Also Published As

Publication number Publication date
EP1736255B1 (de) 2010-11-24
EP1736255A4 (de) 2007-05-02
DE602004030279D1 (de) 2011-01-05
CN1784278A (zh) 2006-06-07
WO2005099929A1 (ja) 2005-10-27
US20070006628A1 (en) 2007-01-11
WO2005099929A8 (ja) 2007-04-12
EP1736255A8 (de) 2007-06-20
JPWO2005099929A1 (ja) 2007-08-16

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