US20100083725A1 - Process for manufacturing ring-shaped member - Google Patents

Process for manufacturing ring-shaped member Download PDF

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Publication number
US20100083725A1
US20100083725A1 US12/450,070 US45007007A US2010083725A1 US 20100083725 A1 US20100083725 A1 US 20100083725A1 US 45007007 A US45007007 A US 45007007A US 2010083725 A1 US2010083725 A1 US 2010083725A1
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US
United States
Prior art keywords
ring
shaped member
pipe member
flange portion
shaped
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.)
Abandoned
Application number
US12/450,070
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English (en)
Inventor
Toshiaki Kanemitsu
Katsuhiko Nakayama
Naoki Fuji
Kazuyuki Oda
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.)
Kanemitsu Corp
Original Assignee
Kanemitsu 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 Kanemitsu Corp filed Critical Kanemitsu Corp
Assigned to KANEMITSU CORPORATION reassignment KANEMITSU CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FUJII, NAOKI, KANEMITSU, TOSHIAKI, NAKAYAMA, KATSUHIKO, ODA, KAZUYUKI
Publication of US20100083725A1 publication Critical patent/US20100083725A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/16—Making other particular articles rings, e.g. barrel hoops

Definitions

  • the present invention relates to a method of producing a ring-shaped member in which a ring-shaped member is obtained from a metal-made pipe member.
  • a ring-shaped member 10 such as shown in FIG. 2 is produced by a method in which, from a stock material 20 shown in FIGS. 3( a ), ( b ) and having a predetermined thickness, a plurality of ring-shaped members 10 are punched out in a single or plural rows by a pressing apparatus.
  • the yield which is a ratio of the weight of the ring-shaped members 10 to that of the stock material 20 is poor, and hence the cost of the ring-shaped member 10 is increased.
  • the reason is that the ratio of a skeleton S 1 and a slug S 2 to the ring-shaped member 10 is high in the material utilization.
  • skeleton means a frame-like scrap which remains as a result of punching of the plurality of ring-shaped members 10 .
  • the term “slug” means a plurality of scraps which are removed by a punch in the process of punching out the plurality of ring-shaped members 10 .
  • the method of shaping a ring-shaped member is configured by steps of: longitudinally forming a slit 22 in the middle of a rectangular steel plate 21 ; pressingly expanding the slit 22 to obtain a polygonal member 23 ; and shaping angled portions 23 a and side portions 23 b of the polygonal member 23 into an arcuate shape which is circumferentially smooth, to obtain a ring-shaped member 10 .
  • the shaping is performed by pressingly expanding the slit 22 of the rectangular steel plate 21 . Therefore, the skeleton S 1 and the slug S 2 such as shown in FIG. 3 are not produced, a material loss can be reduced, and the process cost of the ring-shaped member 10 can be lowered.
  • Patent Literature 1 Japanese Patent Application Laying-Open No. 2004-188548
  • a step of cutting the steel plate member into a rectangular shape to obtain the rectangular steel plate 21 is necessary, and then many further steps such as steps of: forming the slit 22 in the middle of the rectangular steel plate 21 by gas, plasma, or laser; pressingly expanding the slit 22 by an apparatus consisting of male and female dies and a shaping die to obtain the polygonal member 23 ; and, by the shaping die, shaping the angled portions 23 a and side portions 23 b of the polygonal member 23 into an arcuate shape which is circumferentially smooth are required.
  • the steps are complicated.
  • the invention has been conducted in order to solve the problems. It is an object of the invention to provide a method of producing a ring-shaped member in which a material loss is eliminated, the process cost can be reduced, and ring-shaped members can be easily continuously obtained from a pipe member by a small number of steps.
  • the invention according to claim 1 provides a method of producing a ring-shaped member in which a ring-shaped member is obtained from a metal-made pipe member, wherein the method includes steps of: inwardly projectingly shaping a flange portion on an end portion of the pipe member; and cutting off the flange portion from the pipe member, thereby obtaining a ring-shaped member.
  • the flange portion is inwardly projectingly shaped on an end portion of the pipe member, and the flange portion is cut off from the pipe member to obtain the ring-shaped member. Therefore, the skeleton S 1 and the slug S 2 such as shown in FIG. 3 are not produced, a material loss can be eliminated, and the process cost of the ring-shaped member can be lowered.
  • ring-shaped members can be easily continuously obtained from the pipe member by the small number of steps, or namely, the step of inwardly projectingly shaping a flange portion on an end portion of the pipe member, and that of cutting off the flange portion from the pipe member.
  • the invention according to claim 2 provides a method of producing a ring-shaped member in which a ring-shaped member is obtained from a metal-made pipe member, wherein the method includes steps of: inwardly bending a whole circumference of an end portion of the pipe member to shape a tapered truncated conical tubular portion; further inwardly bending the truncated conical tubular portion to shape a flange portion which is inwardly projected; and cutting off the flange portion from the pipe member, thereby obtaining a ring-shaped member.
  • the skeleton S 1 and the slug S 2 such as shown in FIG. 3 are not produced, a material loss can be reduced, the process cost of the ring-shaped member can be lowered, and ring-shaped members can be easily continuously obtained from the pipe member.
  • the truncated conical tubular portion is shaped before the shaping of the inward flange portion on an end portion of the pipe member. Even when the pipe member is thick, therefore, the flange portion can be shaped in a thickness which is uniform as far as possible, while avoiding local thinning, as compared with the case where a perpendicular flange is directly shaped on an end portion of a pipe member.
  • the invention has advantages that ring-shaped members can be easily continuously obtained from a pipe member while eliminating a material loss, and by the small number of steps, and that the process cost of a ring-shaped member can be lowered.
  • FIG. 1 is a step section view of a method of producing a ring-shaped member showing an embodiment of the invention.
  • FIG. 2 is a plan view showing an example of a ring-shaped member.
  • FIG. 3 is a plan view showing a conventional step of punching out blanks from a stock material, (a) shows single-row punching, and (b) shows parallel punching.
  • FIG. 4 is a step diagram of a method of producing a ring-shaped member disclosed in Patent Literature 1.
  • FIG. 1 is a step section view of a method of producing a ring-shaped member showing an embodiment of the invention.
  • a pipe member 1 having a circular section made of a metal such as soft steel, copper, aluminum, iron, or stainless steel is set in a press processing apparatus 2 .
  • the press processing apparatus 2 includes: a punch 3 which is to be passed through the pipe member 1 ; a punch outer 4 ; a first die 5 ; and a first center pin 6 .
  • the first die 5 has a die hole 7 which is opposed to the tip end of the punch 3 , and which has a dish-like section shape that is outward expanded.
  • a tip end portion 6 a of the first center pin 6 having an outer diameter which is smaller than the inner diameter of the pipe member 1 is protruded into the die hole 7 .
  • the pipe member 1 is set so that its end portion 1 a is protruded by a predetermined distance from a tip end portion of the punch 3 .
  • the punch 3 and the first die 5 are relatively moved so as to approach each other, and the end portion 1 a of the pipe member 1 is caused to enter between the tapered inner circumference of the die hole 7 having a dish-like section shape, and the outer circumference of a protruded tip end portion 6 a of the center pin 6 , whereby the whole circumference of the end portion 1 a of the pipe member 1 is inwardly bent to shape a tapered truncated conical tubular portion 1 b (namely, a truncated conical tubular portion shaping step).
  • a processing position which includes: a second die 8 ; a first ejector 9 that is passed through a die hole 8 a of the die 8 , and that has a substantially same diameter as the inner diameter (the outer diameter of the punch 3 ) of the pipe member 1 ; and a second center pin 11 that is passed through a center hole 9 a of the ejector 9 , and that has a substantially same diameter as the inner diameter of a ring-shaped member 10 (see FIG.
  • a tip end portion 11 a of the second center pin 11 is protruded from the tip end of the first ejector 9 , the second die 8 , the first ejector 9 , and the second center pin 11 and the punch 3 are relatively moved so as to approach each other, and the tip end of the first ejector 9 is pressed against the truncated conical tubular portion 1 b , whereby the truncated conical tubular portion 1 b is bent until it is substantially perpendicular to the axis of the pipe member 1 to shape a flange portion is which is inwardly projected (namely, a flange portion shaping step).
  • a processing position which includes: a third die 12 ; and a second ejector 13 that is passed through a die hole 12 a of the die, and that has a substantially same diameter as the inner diameter (the outer diameter of the punch 3 ) of the pipe member 1 , the third die 12 , and the second ejector 13 and the punch 3 are relatively moved so as to approach each other, so that the flange portion 1 c is pressed against the tip end of the punch 3 by the second ejector 13 .
  • the third die 12 is relatively moved so as to further approach the punch 3 , so that a shearing force acts between the die 12 and the punch 3 , and the punch 3 and the edge of the die 12 bites in a base portion of the flange portion 1 c to shear it, whereby the flange portion is cut off from the pipe member 1 , and the ring-shaped member 10 (see FIG. 2 ) can be obtained (namely, a flange portion cutting off step).
  • ring-shaped members 10 can be continuously produced from one pipe member 1 by the pressing process. Furthermore, the ring-shaped member 10 can be easily obtained from the pipe member 1 by the small number of steps, or namely, the step of projectingly shaping the flange portion 1 c on the end portion of the pipe member 1 , and that of cutting off the flange portion 1 c from the pipe member 1 . Therefore, the process cost of the ring-shaped member 10 can be lowered.
  • the truncated conical tubular portion shaping step ( FIG. 1( b )) is performed to shape the truncated conical tubular portion 1 b , before the shaping of the flange portion 1 c on the end portion of the pipe member 1 .
  • the truncated conical tubular portion shaping step is not always necessary.
  • the flange portion is may be inwardly projectingly shaped on the end portion of the pipe member 1 .
  • the flange portion 1 c may be shaped by another flange processing apparatus.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Wire Processing (AREA)
  • Forging (AREA)
US12/450,070 2007-03-12 2007-03-12 Process for manufacturing ring-shaped member Abandoned US20100083725A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/000203 WO2008111121A1 (ja) 2007-03-12 2007-03-12 リング状部材の製造方法

Publications (1)

Publication Number Publication Date
US20100083725A1 true US20100083725A1 (en) 2010-04-08

Family

ID=39759072

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/450,070 Abandoned US20100083725A1 (en) 2007-03-12 2007-03-12 Process for manufacturing ring-shaped member

Country Status (3)

Country Link
US (1) US20100083725A1 (ja)
JP (1) JP5097769B2 (ja)
WO (1) WO2008111121A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104226764A (zh) * 2014-09-29 2014-12-24 江阴德玛斯特钻具有限公司 钻杆保护套内翻边压制装置
JP2016129951A (ja) * 2015-01-13 2016-07-21 岐阜プラスチック工業株式会社 積層構造体、及び積層構造体の端末処理方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015085384A (ja) * 2013-10-31 2015-05-07 太陽工業株式会社 中空円板状金属部品の製造方法
CN108188232A (zh) * 2018-01-09 2018-06-22 伟业精密科技（惠州）有限公司 安全气囊气体发生器拉深收口成型工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2308953A (en) * 1939-09-13 1943-01-19 Firestone Tire & Rubber Co Apparatus for punching and working metal
US2312749A (en) * 1940-08-03 1943-03-02 Giles E Bullock Method of making thin sheet metal shells
US2625896A (en) * 1948-03-15 1953-01-20 Immenroth Otto Rotary progressive die for presses

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5240319B2 (ja) * 1972-12-26 1977-10-11
JPS5668536A (en) * 1979-11-09 1981-06-09 Fujine Kohan:Kk Production of flanged ring
JPH072255B2 (ja) * 1988-03-30 1995-01-18 生野金属株式会社 缶の成形方法
JP3071559B2 (ja) * 1992-05-12 2000-07-31 本田技研工業株式会社 多板摩擦クラッチにおける摩擦板の製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2308953A (en) * 1939-09-13 1943-01-19 Firestone Tire & Rubber Co Apparatus for punching and working metal
US2312749A (en) * 1940-08-03 1943-03-02 Giles E Bullock Method of making thin sheet metal shells
US2625896A (en) * 1948-03-15 1953-01-20 Immenroth Otto Rotary progressive die for presses

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104226764A (zh) * 2014-09-29 2014-12-24 江阴德玛斯特钻具有限公司 钻杆保护套内翻边压制装置
JP2016129951A (ja) * 2015-01-13 2016-07-21 岐阜プラスチック工業株式会社 積層構造体、及び積層構造体の端末処理方法

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Publication number Publication date
WO2008111121A1 (ja) 2008-09-18
JPWO2008111121A1 (ja) 2010-06-24
JP5097769B2 (ja) 2012-12-12

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AS Assignment

Owner name: KANEMITSU CORPORATION,JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KANEMITSU, TOSHIAKI;NAKAYAMA, KATSUHIKO;FUJII, NAOKI;AND OTHERS;REEL/FRAME:023244/0509

Effective date: 20090827

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION