EP2638982A1 - Verfahren zum entwurf eines materials für ein zylinderformungsverfahren und durch zylinderformung verarbeitetes produkt - Google Patents

Verfahren zum entwurf eines materials für ein zylinderformungsverfahren und durch zylinderformung verarbeitetes produkt Download PDF

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Publication number
EP2638982A1
EP2638982A1 EP11849189.3A EP11849189A EP2638982A1 EP 2638982 A1 EP2638982 A1 EP 2638982A1 EP 11849189 A EP11849189 A EP 11849189A EP 2638982 A1 EP2638982 A1 EP 2638982A1
Authority
EP
European Patent Office
Prior art keywords
metal material
thickness
bending
spring back
cylinder forming
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
EP11849189.3A
Other languages
English (en)
French (fr)
Other versions
EP2638982B1 (de
EP2638982A4 (de
Inventor
Mikito Suto
Katsumi Kojima
Yusuke Nakagawa
Masaki Tada
Yoichi Tobiyama
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.)
JFE Steel Corp
Original Assignee
JFE Steel Corp
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Filing date
Publication date
Application filed by JFE Steel Corp filed Critical JFE Steel Corp
Publication of EP2638982A1 publication Critical patent/EP2638982A1/de
Publication of EP2638982A4 publication Critical patent/EP2638982A4/de
Application granted granted Critical
Publication of EP2638982B1 publication Critical patent/EP2638982B1/de
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Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making tubes
    • 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
    • B21D51/00—Making hollow objects
    • B21D51/02—Making hollow objects characterised by the structure of the objects
    • B21D51/10—Making hollow objects characterised by the structure of the objects conically or cylindrically shaped objects

Definitions

  • the present invention relates to a method for designing a metal material in which a spring back angle in cylinder forming can be controlled to a specified value and a product formed by performing cylinder forming.
  • a cylindrically formed product which is manufactured by performing cylinder forming in which a metal material is formed by performing bending forming is used for a food container, a medical device, a metal container, an equipment part and so forth.
  • cylinder forming a cylindrically formed product which is manufactured by performing cylinder forming in which a metal material is formed by performing bending forming
  • a three-piece can which consists of an end, a body and a bottom end a cylinder product formed by performing cylinder forming is used for the body.
  • spring back occurs due to elastic recovery when a metal material (a metal sheet) is subjected to cylinder forming and then unloaded, which results in a change in the shape of the cylinder. Therefore, when cylinder forming is performed, it is necessary to determine the conditions under which cylinder forming is performed in consideration of spring back in advance.
  • a thickness reduction causes an increase in a spring back angle, which makes it impossible to achieve a specified shape of a cylinder, that is, a specified lapping width.
  • a spring back angle is defined in terms of an amount of change in a bending angle from the loaded state to the unloaded state in bending forming.
  • a lapping width is, as illustrated in Fig.
  • Non Patent Literature 2 reports that, the theoretical equation (2) does not necessarily correctly replicate experimental findings. Moreover, although Non Patent Literature 2 proposes an empirical equation regarding a stainless steel sheet, since the target metal material is limited to a stainless steel sheet, it cannot be said that it is suitable for a wide variety of metal materials and there is a problem left from the viewpoint of versatility.
  • the present invention has been completed in view of the situation described above.
  • the inventors found a new method for calculating a spring back angle which occurs when metal materials having a wide variety of mechanical properties and thicknesses are formed by performing cylinder forming, and an object of the present invention is to provide a method for designing a metal material having a material quality (mechanical properties) with which a specified spring back angle can be achieved by using this calculating method and a formed product which is manufactured by performing cylinder forming from the metal material which is designed by using the designing method.
  • a metal material with which a spring back angle can be controlled to a specified value can be easily designed and there is a large contribution to the improvement of productivity and the reduction of cost of a cylinder forming process.
  • a formed product in the case where thickness is changed from t 1 to t 2 , a formed product can be obtained without change in lapping width after cylinder forming has been performed, if a metal material having mechanical properties with which a spring back angle equivalent to that of a metal material having a thickness of t 1 is achieved is used.
  • ⁇ denotes the observed data in Non Patent Literature 2 and dotted lines denote equation (8) and theoretical equation (2).
  • a spring back angle ⁇ before a thickness is changed is observed.
  • a test piece having arbitrary dimensions is subjected to bending forming under the conditions of, for example, a radius of curvature of bending of 12.7 mm and a bending angle of 180 degrees.
  • a bending angle ⁇ ' of the test piece in the unloaded state is observed and a spring back angle ⁇ is calculated by using equation (3) described above. This procedure may be omitted in the case where a spring back angle ⁇ exists as stored data.
  • a metal material having the mechanical properties described above may be selected from a database of a metal material, or a new material may be designed in accordance with the YP and E as indexes in the case where the database cannot be found.
  • a metal material is subjected to bending forming and a spring back angle is observed before the mechanical properties of the metal material are changed.
  • a thickness t is calculated by using equation (1) using the spring back angle described above, a yield strength YP and a Young's modulus E which are specified in advance and the conditions of bending forming (a radius of curvature of bending and a bending angle).
  • the lapping width which is the same as that of the metal material before the mechanical properties of the metal material is changed can be achieved by forming the metal material having this thickness and these mechanical properties by performing cylinder forming.
  • the mean value of the lapping width after cylinder forming had been performed on a steel sheet (No. 2) having YP 300 MPa was -10.5 mm, which means that a lapping width equivalent to that of the metal material before the thickness was reduced was achieved in consideration of the variability of lapping width.
  • the mean value of the lapping width after cylinder forming had been performed on a steel sheet (No. 3) having YP 362 MPa was +5.0 mm, which means that a lapping width equivalent to that of the metal material before the thickness was reduced was not achieved.
  • the mean value of the lapping width after cylinder forming had been performed on a steel sheet (No. 2) having E 231000 MPa was -10.5 mm, which means that the lapping width equivalent to that of the metal material before the thickness was reduced was achieved in consideration of the variability of lapping width.
  • the mean value of the lapping width after cylinder forming had been performed on a steel sheet (No. 3) having E 214000 MPa was -2.4 mm, which means that a lapping width equivalent to that of the metal material before the thickness was reduced was not achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Springs (AREA)
EP11849189.3A 2010-12-14 2011-12-13 Verfahren zum entwurf eines materials für ein zylinderformungsverfahren Active EP2638982B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010277923A JP5803097B2 (ja) 2010-12-14 2010-12-14 円筒成形加工用材料の設計方法および円筒成形加工品の製造方法
PCT/JP2011/079273 WO2012081717A1 (ja) 2010-12-14 2011-12-13 円筒成形加工用材料の設計方法および円筒成形加工品

Publications (3)

Publication Number Publication Date
EP2638982A1 true EP2638982A1 (de) 2013-09-18
EP2638982A4 EP2638982A4 (de) 2018-01-10
EP2638982B1 EP2638982B1 (de) 2020-01-15

Family

ID=46244807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11849189.3A Active EP2638982B1 (de) 2010-12-14 2011-12-13 Verfahren zum entwurf eines materials für ein zylinderformungsverfahren

Country Status (9)

Country Link
US (1) US20130327116A1 (de)
EP (1) EP2638982B1 (de)
JP (1) JP5803097B2 (de)
KR (1) KR101505340B1 (de)
CN (1) CN103260781B (de)
CA (1) CA2818716C (de)
ES (1) ES2771482T3 (de)
TW (1) TWI453073B (de)
WO (1) WO2012081717A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011051160A1 (de) * 2011-06-17 2012-12-20 Thyssenkrupp Steel Europe Ag Verfahren zur Herstellung geschlitzter Hohlprofile
JP6439666B2 (ja) * 2015-12-09 2018-12-19 Ｊｆｅスチール株式会社 ロールフォーム加工性および溶接後の真円度に優れた３ピース缶用鋼板およびその製造方法、ならびに３ピース缶の製造方法
CN110403480A (zh) * 2019-08-28 2019-11-05 武汉安在厨具有限公司 一种铁铝铁三层复合厨具生产工艺

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3352136A (en) * 1965-03-22 1967-11-14 Conrac Corp Metal forming machine
US4436239A (en) * 1981-04-29 1984-03-13 Nippon Steel Corporation Method and apparatus for manufacturing spiral pipe
JPS59209425A (ja) * 1983-05-12 1984-11-28 Nippon Kokan Kk <Nkk> Ｕｏｅ鋼管製造プロセス用ｕプレス工具
JPS62124031A (ja) * 1985-11-22 1987-06-05 Kobe Steel Ltd 溶接管の製造方法
JP3169787B2 (ja) * 1995-03-13 2001-05-28 本田技研工業株式会社 板材のプレス成形方法
JP3268163B2 (ja) * 1995-05-09 2002-03-25 三菱重工業株式会社 板の曲げ加工方法
JPH0910850A (ja) * 1995-06-29 1997-01-14 Kobe Steel Ltd スプリングバック量を利用した鋼管成形方法
JPH10166059A (ja) * 1996-12-06 1998-06-23 Mitsubishi Heavy Ind Ltd 板の曲げ加工方法
TW449509B (en) * 1998-11-04 2001-08-11 Kawasaki Steel Co Bending rolls, and pipe formed thereby
JP2001252722A (ja) * 2000-03-09 2001-09-18 Sumitomo Metal Ind Ltd Ｕプレス工具およびｕｏｅ鋼管の製造法
JP3565131B2 (ja) * 2000-03-30 2004-09-15 Ｊｆｅスチール株式会社 ロールフォーミング性に優れた３ピース缶用鋼板
JP4496707B2 (ja) * 2003-03-03 2010-07-07 Ｊｆｅスチール株式会社 Ｕプレス工具及びｕｏｅ鋼管の製造方法
JP4724626B2 (ja) * 2006-08-31 2011-07-13 新日本製鐵株式会社 スプリングバック発生原因部位特定方法、その装置、及びそのプログラム
CN100493755C (zh) * 2007-08-15 2009-06-03 长春轨道客车股份有限公司 一种金属板材变圆心成型工艺
CN101109945A (zh) * 2007-08-17 2008-01-23 湖北鄂重重型机械有限公司 水平下调式三辊卷板机的控制方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012081717A1 *

Also Published As

Publication number Publication date
ES2771482T3 (es) 2020-07-06
KR20130083458A (ko) 2013-07-22
CA2818716C (en) 2016-03-15
US20130327116A1 (en) 2013-12-12
KR101505340B1 (ko) 2015-03-23
TW201244845A (en) 2012-11-16
JP5803097B2 (ja) 2015-11-04
CA2818716A1 (en) 2012-06-21
CN103260781A (zh) 2013-08-21
TWI453073B (zh) 2014-09-21
WO2012081717A1 (ja) 2012-06-21
CN103260781B (zh) 2015-07-15
EP2638982B1 (de) 2020-01-15
JP2012125780A (ja) 2012-07-05
EP2638982A4 (de) 2018-01-10

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