US3789649A - Draw ring for cans - Google Patents

Draw ring for cans Download PDF

Info

Publication number
US3789649A
US3789649A US00324162A US3789649DA US3789649A US 3789649 A US3789649 A US 3789649A US 00324162 A US00324162 A US 00324162A US 3789649D A US3789649D A US 3789649DA US 3789649 A US3789649 A US 3789649A
Authority
US
United States
Prior art keywords
depressions
width
sheet metal
draw ring
die
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 - Lifetime
Application number
US00324162A
Other languages
English (en)
Inventor
E Clowes
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.)
Alcoa Corp
Original Assignee
Aluminum Company of America
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 Aluminum Company of America filed Critical Aluminum Company of America
Application granted granted Critical
Publication of US3789649A publication Critical patent/US3789649A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/04—Blank holders; Mounting means therefor
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks

Definitions

  • the drawing of shaped objects, such as cylinders, from sheet metal stock involves a controlled flowing of the metal stock into the drawing dies using clamping pressure applied peripherally about the dies by draw rings. Problems of wrinkling and earring may occur 'due to uneven or excessive pressure applied to the sheet metal by the draw rings.
  • FIG. 1 is a vertical cross sectional view of sheet metal drawing apparatus.
  • FIG. 2 is a fragmentary cross sectional view of a portion of FIG. 1 illustrating, in exaggeration the profile of the draw ring of the invention.
  • FIG. '3 is a top view of the draw ring of the invention.
  • FIG. 1 a sheet metal drawing apparatus constructed in accordance with the invention is generally illustrated at 2.
  • the apparatus which can be used with any drawable metal including aluminum or steel in either a coated or non-coated form, comprises an upper die 10 and a lower die 30.
  • Lower die 30 comprises a center post 32 which is detachably mounted by means not shown to the bed of the press.
  • A'draw ring '34 surrounds post 32.
  • Draw ring 34 is urged upwardly by pressure pins 36 which exert a variable pressure against draw ring 34 via air pressure means not shown.
  • Surrounding draw ring 34 is a stationary collar 38 which is mounted via support 40 to the bed of the press.
  • Collar 38 has a front cutting edge 38a which (as will be described below) assists in cutting the sheet metal blank from the sheet metal stock.
  • Die means 10 are attached to the ram of the press and comprise a knockout 12 which is, in turn, surrounded by upper draw ring assembly 14 which comprises draw ring 16 and a cylindrical supporting member 18.
  • a stripper plate 20 comprises a cylindrical washer of approximately the same diameter as collar 38.
  • draw ring 16 forces the sheet metal blank against draw ring 34 which in turn is biased against the underside of the sheet metal blank via the air pressure applied against pressure pins 36.
  • draw ring 16 forces the sheet metal blank against draw ring 34 which in turn is biased against the underside of the sheet metal blank via the air pressure applied against pressure pins 36.
  • the pressure exerted by draw ring 16 against the sheet metal stock and draw ring 34 overcomes the biasing pressure against draw ring 34 via pressure pins 36 and the sheet metal blank is drawn over center post 32 as shown in the drawings.
  • the sheet metal is drawn over post 32 it flows between the draw rings 16 and 34 and, if the pressure exerted between draw rings against the blank is correct, a shaped object is formed over center post 32.
  • the ram of the press is then opened thereby releasing the pressure exerted against lower draw ring 34 by upper draw ring 16.
  • the air pressure exerted against pins 36 urges draw ring 34 upward providing therefore a shearing action against any ear or lip remaining on the drawn sheet metal.
  • the drawn object can then be ejected from center post 32 by well known means such as a central piston or central air orifice or the like.
  • top surface 50 of lower draw ring 34 comprises a series of concentric depressions 52-58 which are, in turn, separated by raised flat portions which define a common plane.
  • each of the depressions 52, 54, 56 and 58 comprises, in a preferred embodiment, arcuate shaped depressions defining small segments of sufflcientlylarge radius to provide an angle with the adjacent fiat portions 60 of about 7l2. and preferably about 9-l0. This has been found to provide a corner between the flat portion 60 and the arcuate depressions .52 et al of small enough angle to prevent stripping or mutilating of the coated surface of the sheet metal.
  • the depth of the depressions should not exceed about one-third of the thickness of the sheet metal to minimize wrinkling. It has also been found that the total width of the depressions should not exceed about 0.09 to 0.15 inches. Apparently, larger or deeper grooves support an insufficient area of the sheet metal to prevent wrinkling.
  • each of the depressions exceeds the flat portion 60 separating the depressions. It has been found that a ratio of about 2 to l is satisfactory provided that the overall width and depth of the depressions does not exceed the values previously discussed. Depressions of smaller overall width as well as smaller radius of width of the depressions to width of the flat portion are, of course, satisfactory. However, if the width of fiat portion 60 greatly exceeds the width of the depressions the purpose of decreasing the overall pressure exerted by draw ring 34 against the sheet metal blank is defeated. Preferably, therefore, the overall width of the depression and the ratio between the fiat and the depressed portions should be maintained.
  • FIG. 3 is a top view of draw ring 34 it will be noted that four concentric depressions have been placed in the face of the draw ring. A larger or smaller number of depressions can, of course, be used depending upon the overall dimensions of draw ring 34.
  • the illustrated embodiment is directed toward the formation of a cylindrical object, such as, for example, a can or the like. While cylindrical shapes are most widely used it is deemed to be within the scope of the invention to utilize the draw ring for rectangular shaped objects as well.
  • draw ring 16 has a planar surface which is approximately parallel to the flat portion 60 of draw ring 34.
  • Pad Draw Pad Draw (pad Pressure ltem pressure pressure Reduced in lb.) in lb.
  • the draw rings were used against the inside coating, that is, the inner, coated, side of the sheet metal and, to evaluate the effect on the coating, the cylinders formed on both the smooth and grooved draw rings were processed in steam and water for minutes at 240 F.
  • the cans were checked by enamel rater, scotch tape and copper sulfate.
  • the cans produced using both types of tooling passed the copper sulfate and scotch tape.
  • the cans processed in water had readings ranging from 0-5 and those processed in steam had readings from 02.5.
  • a drawing die apparatus for drawing shaped members from sheet material wherein the sheet is peripherally engaged respectively by opposing surfaces of a pair of dies while a central post member on one of the dies draws the sheet material into a corresponding cylinder on the other die, the improvement wherein: at least one of said opposing surfaces is provided with a plurality of concentric depressions each having a width of about 009-0. 1 5 inch, and forming an angle with the planar portion of the die not exceeding about 12 separated by planar portions which are opposed by planar portions of the opposed die surface defining the extremities of the opposed surfaces to engage said sheet material in a common plane without deformity of said sheet material.
  • each of said depressions is greater than the width of the planar portion between adjacent depressions to provide a substantial reduction in contact area between the opposing die surfaces and the sheet material being drawn therebetween.
  • Improved draw ring members for peripheral engagement of sheet-metal stock during a drawing operation comprising opposing draw ring surfaces wherein at least one of said surfaces contains a plurality of concentric concave channels therein, each of said concave channels having a width of approximately 0.09-0.15 inch, a depth not exceeding about one-third of the thickness of the sheet metal to be engaged by said opposing surfaces, and an angle of intersection with the planar portions of the surface therebetween not exceeding about 12, each of said planar portions having a width not exceeding the width of said channel to provide a reduction in contact area between the opposing die surfaces and the sheet metal being drawn therebetween.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US00324162A 1973-01-16 1973-01-16 Draw ring for cans Expired - Lifetime US3789649A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US32416273A 1973-01-16 1973-01-16

Publications (1)

Publication Number Publication Date
US3789649A true US3789649A (en) 1974-02-05

Family

ID=23262364

Family Applications (1)

Application Number Title Priority Date Filing Date
US00324162A Expired - Lifetime US3789649A (en) 1973-01-16 1973-01-16 Draw ring for cans

Country Status (2)

Country Link
US (1) US3789649A (enrdf_load_stackoverflow)
JP (1) JPS49102553A (enrdf_load_stackoverflow)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414836A (en) * 1982-09-30 1983-11-15 National Steel Corporation Method of and apparatus for deep drawing metal containers
US4522049A (en) * 1983-03-14 1985-06-11 Aluminum Company Of America Aluminum alloy food can body and method for making same
US4576030A (en) * 1983-08-31 1986-03-18 Wallace Expanding Machines, Inc. Stretch form die
US5157969A (en) * 1989-11-29 1992-10-27 Armco Steel Co., L.P. Apparatus and method for hydroforming sheet metal
WO1995030499A1 (en) * 1994-05-06 1995-11-16 Owens Corning Apparatus and method for retention of thin foils during forming
US5865054A (en) * 1989-08-24 1999-02-02 Aquaform Inc. Apparatus and method for forming a tubular frame member
US5946964A (en) * 1998-04-01 1999-09-07 American National Can Company Redraw sleeve for can body making station
US6196043B1 (en) 1999-08-27 2001-03-06 General Motors Corporation Double vee lockbead for sheet metal forming
US6807838B2 (en) * 2000-12-06 2004-10-26 Kobe Steel, Ltd. Press die
US20040250594A1 (en) * 2003-05-28 2004-12-16 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Punching method
US7237423B1 (en) 2004-11-12 2007-07-03 Miller Tool And Die Company Inc. Apparatus for stretch forming blanks
FR3005881A1 (fr) * 2013-05-22 2014-11-28 Peugeot Citroen Automobiles Sa Outillage d’emboutissage pour piece de carrosserie de vehicule
US20150089990A1 (en) * 2013-09-30 2015-04-02 National Kaohsiung First University Of Science And Technology Bending die having surface microstructures and bending punch thereof
US20150122101A1 (en) * 2013-11-05 2015-05-07 Cheng-Ping Wang Trough-form fine blanking device
US20150246384A1 (en) * 2012-10-10 2015-09-03 Toyo Kohan Co., Ltd. Method of manufacturing cylindrical container
CN105121050A (zh) * 2013-04-15 2015-12-02 蒂森克虏伯钢铁欧洲股份公司 制造高尺寸稳定的轴瓦的方法和制造轴瓦的装置
WO2017031450A1 (en) * 2015-08-20 2017-02-23 Anheuser-Busch, Llc Cupper draw pad
EP3254778A1 (en) * 2016-06-07 2017-12-13 Can - Pack S.A. Tools and a machine for manufacturing of packages from sheet metal
US20190143624A1 (en) * 2017-09-01 2019-05-16 Benteler Automobiltechnik Gmbh Downholding press for producing a semi-finished product from sheet-metal material having thickness-reduced regions, and method for producing a sheet-metal formed part
CN110508683A (zh) * 2019-08-07 2019-11-29 芜湖佳鑫机械制造有限公司 一种快速成型的前地板拉深精密模具
CN111229949A (zh) * 2020-01-16 2020-06-05 燕山大学 一种用于拉深成形的润滑结构及供油控制系统和成形方法
US20200197997A1 (en) * 2018-12-19 2020-06-25 Dajun Zhou Stretch forming die

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58173029A (ja) * 1982-04-05 1983-10-11 Nissan Motor Co Ltd 段絞り用金型
JP5029481B2 (ja) * 2008-04-23 2012-09-19 澁谷工業株式会社 キャップ成型装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1571171A (en) * 1924-11-10 1926-01-26 Leedy Mfg Company Process of forming kettles and die therefor
US2821156A (en) * 1951-12-05 1958-01-28 Lyon George Albert Die
US2971644A (en) * 1955-02-11 1961-02-14 Cefilac Extrusion dies
US3349153A (en) * 1962-10-04 1967-10-24 Kalle Ag Process for deep-drawing films and foils
US3420089A (en) * 1966-02-16 1969-01-07 Mc Donnell Douglas Corp Variable pressure drawpress and method
US3664172A (en) * 1970-06-01 1972-05-23 Reynolds Metals Co Apparatus for and method of forming cup-shaped articles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1571171A (en) * 1924-11-10 1926-01-26 Leedy Mfg Company Process of forming kettles and die therefor
US2821156A (en) * 1951-12-05 1958-01-28 Lyon George Albert Die
US2971644A (en) * 1955-02-11 1961-02-14 Cefilac Extrusion dies
US3349153A (en) * 1962-10-04 1967-10-24 Kalle Ag Process for deep-drawing films and foils
US3420089A (en) * 1966-02-16 1969-01-07 Mc Donnell Douglas Corp Variable pressure drawpress and method
US3664172A (en) * 1970-06-01 1972-05-23 Reynolds Metals Co Apparatus for and method of forming cup-shaped articles

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414836A (en) * 1982-09-30 1983-11-15 National Steel Corporation Method of and apparatus for deep drawing metal containers
WO1984001314A1 (en) * 1982-09-30 1984-04-12 Nat Steel Corp Method of and apparatus for deep drawing metal containers
US4522049A (en) * 1983-03-14 1985-06-11 Aluminum Company Of America Aluminum alloy food can body and method for making same
US4576030A (en) * 1983-08-31 1986-03-18 Wallace Expanding Machines, Inc. Stretch form die
US5865054A (en) * 1989-08-24 1999-02-02 Aquaform Inc. Apparatus and method for forming a tubular frame member
US5157969A (en) * 1989-11-29 1992-10-27 Armco Steel Co., L.P. Apparatus and method for hydroforming sheet metal
US5372026A (en) * 1989-11-29 1994-12-13 Armco Steel Company Apparatus and method for hydroforming sheet metal
WO1995030499A1 (en) * 1994-05-06 1995-11-16 Owens Corning Apparatus and method for retention of thin foils during forming
US5505071A (en) * 1994-05-06 1996-04-09 Owens-Corning Fiberglas Technology, Inc. Apparatus and method for retention of thin foils during forming
US5946964A (en) * 1998-04-01 1999-09-07 American National Can Company Redraw sleeve for can body making station
US6196043B1 (en) 1999-08-27 2001-03-06 General Motors Corporation Double vee lockbead for sheet metal forming
US6807838B2 (en) * 2000-12-06 2004-10-26 Kobe Steel, Ltd. Press die
US20040250594A1 (en) * 2003-05-28 2004-12-16 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Punching method
US8056384B2 (en) * 2003-05-28 2011-11-15 Luk Vermoegensverwaltungsgesellschaft Mbh Punching method
US7237423B1 (en) 2004-11-12 2007-07-03 Miller Tool And Die Company Inc. Apparatus for stretch forming blanks
US10441991B2 (en) * 2012-10-10 2019-10-15 Toyo Kohan Co., Ltd Method of manufacturing cylindrical container
US20150246384A1 (en) * 2012-10-10 2015-09-03 Toyo Kohan Co., Ltd. Method of manufacturing cylindrical container
US10065229B2 (en) * 2013-04-15 2018-09-04 Thyssenkrupp Steel Europe Ag Method for producing highly dimensionally accurate half-shells and apparatus for producing a half-shell
CN105121050A (zh) * 2013-04-15 2015-12-02 蒂森克虏伯钢铁欧洲股份公司 制造高尺寸稳定的轴瓦的方法和制造轴瓦的装置
US20160052037A1 (en) * 2013-04-15 2016-02-25 Thyssenkrupp Steel Europe Ag Method for producing highly dimensionally accurate half-shells and apparatus for producing a half-shell
FR3005881A1 (fr) * 2013-05-22 2014-11-28 Peugeot Citroen Automobiles Sa Outillage d’emboutissage pour piece de carrosserie de vehicule
US20150089990A1 (en) * 2013-09-30 2015-04-02 National Kaohsiung First University Of Science And Technology Bending die having surface microstructures and bending punch thereof
US9003858B1 (en) * 2013-09-30 2015-04-14 National Kaohsiung First University Of Science And Technology Bending die having surface microstructures and bending punch thereof
US20150122101A1 (en) * 2013-11-05 2015-05-07 Cheng-Ping Wang Trough-form fine blanking device
US9676020B2 (en) * 2013-11-05 2017-06-13 Cheng-Ping Wang Trough-form fine blanking device
CN104607528A (zh) * 2013-11-05 2015-05-13 王正平 沟槽型精密下料装置
US10807139B2 (en) * 2015-08-20 2020-10-20 Anheuser-Busch, Llc Cupper draw pad
CN108200763A (zh) * 2015-08-20 2018-06-22 安海斯-布希有限公司 制杯机拉拔垫
US20180236525A1 (en) * 2015-08-20 2018-08-23 Anheuser-Busch, Llc Cupper Draw Pad
WO2017031450A1 (en) * 2015-08-20 2017-02-23 Anheuser-Busch, Llc Cupper draw pad
US20170050232A1 (en) * 2015-08-20 2017-02-23 Anheuser-Busch, Llc Cupper draw pad
EP3254778A1 (en) * 2016-06-07 2017-12-13 Can - Pack S.A. Tools and a machine for manufacturing of packages from sheet metal
US20190143624A1 (en) * 2017-09-01 2019-05-16 Benteler Automobiltechnik Gmbh Downholding press for producing a semi-finished product from sheet-metal material having thickness-reduced regions, and method for producing a sheet-metal formed part
US20200197997A1 (en) * 2018-12-19 2020-06-25 Dajun Zhou Stretch forming die
US10933458B2 (en) * 2018-12-19 2021-03-02 Fca Us Llc Stretch forming die
CN110508683A (zh) * 2019-08-07 2019-11-29 芜湖佳鑫机械制造有限公司 一种快速成型的前地板拉深精密模具
CN111229949A (zh) * 2020-01-16 2020-06-05 燕山大学 一种用于拉深成形的润滑结构及供油控制系统和成形方法

Also Published As

Publication number Publication date
JPS49102553A (enrdf_load_stackoverflow) 1974-09-27

Similar Documents

Publication Publication Date Title
US3789649A (en) Draw ring for cans
US4193285A (en) Method of deep-drawing of a container or the like from an aluminium material
AU664917B2 (en) Two stage die set
US2422883A (en) Method and apparatus for flanging sheet metal
US4576030A (en) Stretch form die
US3144974A (en) Manufacture of food container and the like from aluminum foil or other thin metallic material
JPH07100201B2 (ja) 絞られた缶体方法、装置及び製品
CN110722045B (zh) 一种深筒件高减薄率拉深工艺
KR920703233A (ko) 제어 측벽 신장부를 가진 일체의 캔 몸체
US4863333A (en) Apparatus for forming cans
US3372569A (en) Die to form and trim a round tapered container in one operation
US3421466A (en) Sink-forming method
US2003981A (en) Method of corrugating sheet metal receptacles
CN111618152A (zh) 一种挤压半剪式成型凸包的工艺
SU1590160A1 (ru) Способ изготовлени полых изделий и штампы дл его осуществлени
SU979009A1 (ru) Штамп дл штамповки изделий типа панелей
CN113878006A (zh) 一种薄板覆盖件加强筋成形模具及成形方法
SU1731357A1 (ru) Способ торможени фланца листовой заготовки в процессе выт жки
CN211727203U (zh) 一种扁扶手压弧成型模具
CN217570411U (zh) 一种减小精冲件尖角处塌角的模具结构
GB956710A (en) Manufacture of food container and the like from aluminum foil or other thin metallic material
JPH08174086A (ja) 板金のプレス方法
TWM479806U (zh) 溝道型精密下料裝置
CN213436673U (zh) 一种双向不规则u形件的复合模
CN215144352U (zh) 克制不锈钢板材冷镦挤压形变的模具