US3724247A - Production of deep drawn pressings - Google Patents

Production of deep drawn pressings Download PDF

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Publication number
US3724247A
US3724247A US00147380A US3724247DA US3724247A US 3724247 A US3724247 A US 3724247A US 00147380 A US00147380 A US 00147380A US 3724247D A US3724247D A US 3724247DA US 3724247 A US3724247 A US 3724247A
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Prior art keywords
punch
die
mouth
compressive force
dimensions
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Expired - Lifetime
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US00147380A
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English (en)
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C Page
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Alcan Research and Development Ltd
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Alcan Research and Development Ltd
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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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass

Definitions

  • the present invention relates to the production of deep drawn shells from light gauge metal, including aluminum and aluminum alloys.
  • the metal may be lacquered or laminated with a plastic film, such as a coating of polyethylene or polypropylene.
  • the taper may be a straight taper or alternatively the side walls may have a curving taper, as ina conventional pudding bowl.
  • an angle of 3 5 usually being perfectly acceptable for this purpose.
  • angles up to about 13 are sometimes required.
  • the depth of the container is usually in the range of l 3 inches, so that the difference in size between the bottom of the container and its mouth will be quite small.
  • U.S. Pat. No. 3,344,646 A method of deep drawing tapered receptacles from thin sheet metal has already been proposed in U.S. Pat. No. 3,344,646.
  • a tapered punch is employed in conjunction with a die, which incorporates a ring is made of nylon or teflon and strokes the outer surface of the work at a position close to the mouth of the die as it is drawn into the die.
  • the arrangement is claimed to remove the wrinkles formed in drawing thin sheet by the operation of the punch.
  • U.S. Pat. No. 3,344,646 also suggests that the ring might be carried in the punch without disclosing in what manner it should be arranged to effect the desired work-stroking action.
  • the method of the present invention relies on the use of a punch which maintains the metal in close conformity with the die wall by the exercise of hydraulic or elastohydraulic pressure around the periphery of the nose of the punch so that the effective dimensions of the punch nose progressively decrease as it progresses into the tapered die.
  • the present invention enables a deep drawn shell, having a tapered side wall, to be produced from light gauge metal by arranging that the die has a tapered inside wall and that the punch has a side wall which can remain in close conformity with the side wall of the die whilst drawing sheet metal into the die mouth.
  • the side of the punch is comprised by a member,'the nose end of which initially of dimensions substantially equal to that of the die mouth and which can yield under the compressive force exerted by the flexible U-section ring in its side wall.
  • the U-section side wall of the die whilst exerting substantial reaction force through hydraulic or elasto-hydraulic pressure.
  • the punch side must be such that it doesnot yield readily under the forces exerted on it as the result of the drawing action of the punch on the metal sheet and the minimum force under which the punch side may yield is dependent to large extent on the thickness and physical properties of the sheet, which the punch is designed to draw.
  • the side of the punch is preferably formed of a member of rubber (which term is employed herein to cover other elastomeric materials), arranged in a recess in the punch and which initially has dimensions at its nose end corresponding to the dimensions of the die mouth.
  • the punch may be provided with a massive rubber member, having a truncated-V cross-section and arranged in a correspondingly shaped groove. A space is left between the base of the rubber member and the bottom of the groove to provide room for the rubber to flow into when its outer surface is pressed inwardly by the tapered die wall.
  • one edge of the'rubber than at the nose end because there is some tendency of rubber, displaced by compression of the nose end, to
  • the I rubber member may be formed of a series of parts arranged end-to-end and separated by rigid metal spacers of sightly smaller diameter.
  • an appropriately shaped rubber member is arranged in the groove and is backed by resilient means such as a series of springs or an annular bag filled with gas under high pressure with a hydraulic liquid in communication with a mass of gas,
  • the nose end of the punch is formed of a shaped envelope made of a somewhat resilient plastics material, such as polyurethane, filled with a hydraulic fluid which is in communication with an enclosed mass of gas to permit some hydraulic fluid to be displaced from said envelope against gas pressure.
  • FIG. 1 is a section of one form of punch
  • FIG. 2 is a section of an alternative form of punch
  • FIG. 3 is a section of a die for use with the punch of FIG. 1 or 2,
  • FIG. 4 is a section of a die set incorporating the punch and die
  • FIG. 5 is a vertical section illustrating two alternative forms of punch
  • FIG. 6 is a vertical section illustrating a further form of punch
  • FIG. 7 is a vertical section illustrating a still further form of punch.
  • the die 1 shown in FIG. 3 has an annular top end 2 which leads through a radiused corner 3 into sides 4, which are tapered at an angle of about 4. At the mouth of the die there is an edge surface 5, leading into an inclined face 6.
  • the punches shown in FIGS. 1 and 2 have a nose 11, which has a flat surface 12 leading via a rounded corner into a tapered side wall 14.
  • the diameter of the surface 12 is slightly less than that of the end 2 of the die and the taper angle of the side wall 14 of the punch is the same as the taper angle of the sides 4 of the die.
  • a V-groove 15 is cut in the side wall 14 of the punch and occupies substantially the whole length of the side wall.
  • a V-shaped rubber member 16' having an outer surface 17, which in its normal condition' has substantially the same diameter as the mouth of die 1.
  • a space 18 between the inner periphery of the member 16 and the bottom of the groove is available for flow of the rubber when subjected to compression by the inward relative movement of the punch and die.
  • the rounded edge 17a of the rubber member 16 is located at only a small distance to the rear of the head end surface 12 of the punch and, in efiect, is initially the peripheral edge of the punch nose. It is at this edge 17a that the drawing of the sheet material commences.
  • the material used for the rubber member 16 should be resistant to abrasion and, as far as possible, self-lubricating.
  • a suitable material for use in conjunction with a conventional aluminum alloy employed for can-making has the following properties:
  • Durometer Reading 92 Tensile Strength 5500 pounds/square inch Modulus at 200% 1200 pounds/square inch Ultimate Elongation 600%
  • Polyurethane materials having properties within these ranges are sold by Avon Rubber Co., Ltd., Melksham, Wiltshire, England, under the name Avothane. This material would be too hard for soft aluminum foils and insufficiently hard for harder and tougher metals.
  • the elastomeric material used in the die must be selected in accordance with the duty which the die is to perform.
  • the member 16 is replaced by an insert 20, which communicates with an oil supply gallery 21.
  • An elastic envelope member 22 is bonded to the insert 20 and its periphery moves between the dotted line position, which it assumes when it is free from confinement by the die, and the full line position.
  • the oil is maintained under pressure which gradually increases as the oil is expelled through the oil supply gallery.
  • the die of FIG. 3 and the punch of FIG. 1 are shown assembled into an otherwise conventional die set in FIG. 4.
  • the die set illustrated in this figure is intended for the production of container shells at high speed from continuous strip material, a flat blank being punched out of the strip in the first stage of the press movement, the blank being drawn by the illustrated punch and die in the second stage and finally trimmed at the end of the press stroke.
  • FIG. 4 the parts of the die set are shown respectively at the top and bottom of their travel in the right and left half of the figure.
  • the punch 11, 11b is mounted on a bottom platen 30, on which is also mounted a blanking die 31. Between the punch 11, ilb and blanking die 31 is a blankholder 32, pressed upwardly against a shoulder on blankholder 32 by spring-loaded pressure pins 33, and a trimming die 34.
  • the die 1 (which is somewhat modified as compared with FIG. 3) is mounted within a blanking punch 35 secured to an upper platen 36 and is backed by a resiliently compressible disc 37.
  • An ejector 38 is mounted within the die 1 and a spring-loaded stripper 39 is motmted around the blanking punch 35.
  • the first efiect of the downward movement of the platen 36 is to blank out a disc having a diameter equal to the internal diameter of the blanking die 31. This disc is then gripped between the blanking punch 35 and the blankholder 32 as the drawing die l and punch 11,
  • the punch comprises a central shaft 40, having a head 41.
  • Head 41 has an inclined underneath surface 42, which is in contact with a corresponding surface 43 on a ring-shaped rubber member 44.
  • the rubber member 44 also has an inclined surface 45, which contacts a surface 46 on a slider 47, which is pressed upwardly axially by springs 48.
  • the slider 47 is maintained concentric with the shaft 41 by engagement of its tail 49 with a stationary guide 50.
  • the tail 48 of the slider 47 may slide on the outside of the guide 49 as shown in the right-hand side of FIG. 5.
  • the slider 47 may have a tail 49, which is guided in a bore inside the guide 50', within which the springs 48 are housed, as shown in the left-hand side of FIG. 5.
  • the nose end of the punch may be vented to atmosphere in known manner to ensure separation of the punch from the shell during the return stroke.
  • the envelope 60 is so dimensioned that the diameter of its side wall, after pressurization of the hydraulic accumulator is approximately equal to the mouth diameter of the die.
  • a rigid nose piece 68 is secured in the nose of the end envelope by the engagement of a threaded portion with a nut 69.
  • the nose piece 68 is slidably mounted in the bolt 64 and is biased downwardly by spring washers 70, which press down against an abutment ring 71.
  • the nose end of the punch is vented to atmosphere via vent passage 72 in the stem of the nose piece and a flexible vent pipe 73 secured to the stem of nose piece 68. It will be noted that the peripheral diameter of the nose piece is considerably smaller than that of the nose end of the envelope 60.
  • the nose piece 68 tends to rise in relation to the base 61, compressing the washers and thus allowing the side wall of the envelope to elongate to provide space into which displaced material from the envelope may flow.
  • FIG. 7 A still further form of punch is illustrated in FIG. 7.
  • the punch is formed by a substantially cylindrical rubber member having a wall thickness of at least 7% inch (1.25 cms).
  • the diameter of the nose end of the member 80 is substantially equal to that of the die mouth and slightly exceeds the diameter of the bottom or tail end.
  • the member 80 is provided with a thickened flange 81 which'is' clamped against a dished surface 82 of the die base 83 by a stud 84, provided with a vent passage 85.
  • the periphery of the stud 84 is slightly relieved at 86. It is only the portion of the member 80 at and above the relieved portion 86 which is intended to enter-the die.
  • the recess in the nose end of the member provides space to receive material displaced by the compression of the thick rubber wall. Whilst it may be cylindrical as illustrated, it may also be slightly conical.
  • a punch and die set for the production of deep drawn shells having tapered side walls from thin metal sheet or foil comprising a die having a tapered side wall which tapers progressively from its mouth inwardly to smaller dimensions at its end remote from the mouth, and a punch which has a side wall formed by a member capable of yielding under compressive force and exerting substantial hydraulic or elasto-hydraulic pressure in reaction to compressive force, said member when free from peripheral compressive force, having at least at its nose end substantially the dimensions of the die mouth, said punch and die being mutually shaped for substantial drawing of the sheet or foil axially of the punch by movement of the punch into the die to the end thereof while said member compressively holds the sheet or foil against the die wall.
  • the side wall member comprises a solid rubber member arranged in a groove in the'side wall of a punch having portion corresponding in dimensions with the die mouth, the peripheral dimensions of at least the nose end of said rubber member, when free from peripheral compressive force, corresponding to the dimensions of the die mouth.
  • a punch and die set according to claim 1 in which the punch is composed of a solid rubber member confined between a rigid head member and a tail member, the head member being smaller in dimension than the end of the die remote from the mouth, a portion of the rubber member being exposed around the periphery of the head member to define the periphery of the nose end of the punch.
  • a punch and die set according to claim 3 in which the rubber member is subjected to a predetermined axial loading pressure, when free from peripheral compressive force, by means of an axially slidable tail member, subjected to an axial biasing load.
  • a punch and die set according to claim l in which the nose end of the punch is composed of a thick walled elastic envelope, filled with hydraulic fluid in communication with an enclosed mass of gas, the said envelope being secured to the tail of the punch and having a side wall, which when free from compresive force, has dimensions corresponding to the die mouth.
  • a punch and die set for the production of deep drawn shells having tapered side walls from thin metal blanks comprising a die and having a side wall which tapers progressively from its mouth inwardly to its remote end substantially without widening at any place, and a punch which has a side wall formed by a member capable of yielding under compressive force and exerting substantial hydraulic or elasto-hydraulic pressure in reaction to compressive force, said member when free from peripheral compressive force, having at last its nose end with substantially the dimensions of the die mouth, said member being shaped substantially to fit into said mouth and being subjected to radial compressive force substantially only on axial movement of the punch within said tapered wall, said punch having a rigid head member of dimensions smaller than the nose end of the punch wall member, and tail means, said wall member being held between said head member and said tail means, and said punch and die being mutually shaped so that movement of the punch against the blank into the die effects substantial drawing of thebla nlk axially until said head member causes the drawn blank to approach the remote end

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US00147380A 1970-06-02 1971-05-27 Production of deep drawn pressings Expired - Lifetime US3724247A (en)

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Application Number Priority Date Filing Date Title
GB2666270 1970-06-02

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US (1) US3724247A (fr)
JP (1) JPS5138674B1 (fr)
AR (1) AR196059A1 (fr)
CA (1) CA943013A (fr)
CH (1) CH553601A (fr)
DE (2) DE7030191U (fr)
DK (1) DK148198C (fr)
FR (1) FR2093984B1 (fr)
GB (1) GB1349059A (fr)
ZA (1) ZA713343B (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5048317A (en) * 1988-06-04 1991-09-17 Toyo Seikan Kaisha Ltd. Method of manufacturing draw-formed container
US5315858A (en) * 1992-11-20 1994-05-31 Crown Cork & Seal Company, Inc. Methods and apparatus for redrawing thin-walled container bodies
US6860134B2 (en) * 2000-12-28 2005-03-01 Riken Ironing dies
US20050120548A1 (en) * 2003-12-09 2005-06-09 James Rohl Apparatus and method for cutting electrode foil layers
ES2242510A1 (es) * 2003-10-30 2005-11-01 Industrias Samar't, S.A. Disposicion para la embuticion de signos en relieve.
US20080053185A1 (en) * 2006-08-30 2008-03-06 Cardiac Pacemakers Inc. System and method for die cutting manifold including a lubrication channel
CN110216202A (zh) * 2019-07-15 2019-09-10 叶洪蔚 一种冲切模具用的退料浸油式装夹装置
US20210316354A1 (en) * 2020-04-10 2021-10-14 Southwest Technology And Engineering Research Institute Fine blanking method and device for forming friction plates with friction material layers

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL181914C (nl) * 1977-07-05 1900-01-01 Toyo Seikan Kaisha Ltd Inrichting voor het vervaardigen van getrokken voorwerpen.
ZA807387B (en) * 1979-12-08 1981-11-25 Metal Box Co Ltd Containers
JPS6030528A (ja) * 1983-07-28 1985-02-16 Toyo Kohan Co Ltd 絞り成形性に優れた金属箔容器成形工具
DE3609879A1 (de) * 1986-03-24 1987-10-08 Hoerbiger & Co Reibring fuer kupplungen oder bremsen, verfahren und vorrichtung zum herstellen des reibringes
GB9115717D0 (en) * 1991-07-20 1991-09-04 Lawson Mardon M I Ltd Sheet metal forming tool and method
DE19533598A1 (de) * 1995-09-11 1997-03-13 Alcan Gmbh Verfahren zum Ziehen eines Behälters aus flächigem Material
USD742251S1 (en) 2014-07-16 2015-11-03 Ball Corporation Two-piece contoured metallic container
USD758207S1 (en) 2014-08-08 2016-06-07 Ball Corporation Two-piece contoured metallic container
EP3206810A4 (fr) 2014-10-15 2018-05-23 Ball Corporation Appareil et procédé pour former une épaule et un col d'un contenant métallique
AU2015339316A1 (en) 2014-10-28 2017-04-27 Ball Corporation Apparatus and method for forming a cup with a reformed bottom
USD804309S1 (en) 2016-02-17 2017-12-05 Ball Corporation Metal bottle
CN114603029B (zh) * 2022-03-03 2023-01-13 北京机科国创轻量化科学研究院有限公司 一种高性能混杂层板热-固一体化成形工艺

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US731367A (en) * 1902-08-11 1903-06-16 Huberpressung Ges Mit Beschraenkter Haftung Of Karlsruhe Ges Means and apparatus for molding hollow articles.
US946962A (en) * 1907-10-26 1910-01-18 William H Graham Dental-crown-swaging device.
FR659408A (fr) * 1928-08-22 1929-06-28 Roullier Ets Procédé permettant de façonner à froid des pièces métalliques
US2037795A (en) * 1933-08-17 1936-04-21 Gen Motors Corp Apparatus for expanding articles
US2326990A (en) * 1942-04-14 1943-08-17 Bell Aircraft Corp Hydraulic tube beader
US2354564A (en) * 1942-05-27 1944-07-25 Julian T Lett Sheet pulp container male die apparatus
US2606516A (en) * 1947-12-16 1952-08-12 Harbor Aircraft Corp Apparatus for forming sheet metal material
US2662499A (en) * 1949-06-21 1953-12-15 Lyon George Albert Apparatus for making wheel covers
US3344646A (en) * 1961-03-15 1967-10-03 Reynolds Metals Co Method for making thin metal sheet tapered receptacles

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR321612A (fr) * 1902-05-21 1903-01-15 B. H. Procédé et appareil pour la fabrication à la presse et au moyen de matelas d'eau, d'objets creux

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US731367A (en) * 1902-08-11 1903-06-16 Huberpressung Ges Mit Beschraenkter Haftung Of Karlsruhe Ges Means and apparatus for molding hollow articles.
US946962A (en) * 1907-10-26 1910-01-18 William H Graham Dental-crown-swaging device.
FR659408A (fr) * 1928-08-22 1929-06-28 Roullier Ets Procédé permettant de façonner à froid des pièces métalliques
US2037795A (en) * 1933-08-17 1936-04-21 Gen Motors Corp Apparatus for expanding articles
US2326990A (en) * 1942-04-14 1943-08-17 Bell Aircraft Corp Hydraulic tube beader
US2354564A (en) * 1942-05-27 1944-07-25 Julian T Lett Sheet pulp container male die apparatus
US2606516A (en) * 1947-12-16 1952-08-12 Harbor Aircraft Corp Apparatus for forming sheet metal material
US2662499A (en) * 1949-06-21 1953-12-15 Lyon George Albert Apparatus for making wheel covers
US3344646A (en) * 1961-03-15 1967-10-03 Reynolds Metals Co Method for making thin metal sheet tapered receptacles

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5048317A (en) * 1988-06-04 1991-09-17 Toyo Seikan Kaisha Ltd. Method of manufacturing draw-formed container
US5315858A (en) * 1992-11-20 1994-05-31 Crown Cork & Seal Company, Inc. Methods and apparatus for redrawing thin-walled container bodies
US6860134B2 (en) * 2000-12-28 2005-03-01 Riken Ironing dies
ES2242510A1 (es) * 2003-10-30 2005-11-01 Industrias Samar't, S.A. Disposicion para la embuticion de signos en relieve.
US20050120548A1 (en) * 2003-12-09 2005-06-09 James Rohl Apparatus and method for cutting electrode foil layers
US8033202B2 (en) 2003-12-09 2011-10-11 Cardiac Pacemakers, Inc. Apparatus and method for cutting electrode foil layers
US20080053185A1 (en) * 2006-08-30 2008-03-06 Cardiac Pacemakers Inc. System and method for die cutting manifold including a lubrication channel
CN110216202A (zh) * 2019-07-15 2019-09-10 叶洪蔚 一种冲切模具用的退料浸油式装夹装置
CN110216202B (zh) * 2019-07-15 2020-11-17 江苏永茂普隆汽车配件制造有限公司 一种冲切模具用的退料浸油式装夹装置
US20210316354A1 (en) * 2020-04-10 2021-10-14 Southwest Technology And Engineering Research Institute Fine blanking method and device for forming friction plates with friction material layers
US11498110B2 (en) * 2020-04-10 2022-11-15 Southwest Technology And Engineering Research Institute Fine blanking method and device for forming friction plates with friction material layers

Also Published As

Publication number Publication date
FR2093984A1 (fr) 1972-02-04
DK148198C (da) 1985-10-07
DE2127367A1 (de) 1971-12-23
DK148198B (da) 1985-04-29
JPS5138674B1 (fr) 1976-10-22
CA943013A (en) 1974-03-05
ZA713343B (en) 1972-01-26
AR196059A1 (es) 1973-11-30
CH553601A (de) 1974-09-13
GB1349059A (en) 1974-03-27
DE2127367B2 (de) 1977-03-03
DE7030191U (de) 1971-02-18
FR2093984B1 (fr) 1974-08-19

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