WO2006006958A9 - Procede de fabrication d'un contenant cylindrique et contenant cylindrique fabrique au moyen de ce procede - Google Patents

Procede de fabrication d'un contenant cylindrique et contenant cylindrique fabrique au moyen de ce procede

Info

Publication number
WO2006006958A9
WO2006006958A9 PCT/US2005/007729 US2005007729W WO2006006958A9 WO 2006006958 A9 WO2006006958 A9 WO 2006006958A9 US 2005007729 W US2005007729 W US 2005007729W WO 2006006958 A9 WO2006006958 A9 WO 2006006958A9
Authority
WO
WIPO (PCT)
Prior art keywords
container
ironing
thickness
cylindrical container
further characterized
Prior art date
Application number
PCT/US2005/007729
Other languages
English (en)
Other versions
WO2006006958A1 (fr
Inventor
Richard Dye
Original Assignee
Spartanburg Steel Products Inc
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 Spartanburg Steel Products Inc filed Critical Spartanburg Steel Products Inc
Publication of WO2006006958A1 publication Critical patent/WO2006006958A1/fr
Publication of WO2006006958A9 publication Critical patent/WO2006006958A9/fr

Links

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
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2684—Cans or tins having circumferential side seams
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49893—Peripheral joining of opposed mirror image parts to form a hollow body

Definitions

  • This invention pertains to an improved method of producing a cylindrical container, and more particularly to utilizing a drawing and ironing process to make the container.
  • Drawing is a known metal fabrication technique wherein a given blank of material, particularly metal as used in pressure vessels, is reformed or reshaped to a particular, desired configuration. Drawing effectively retains or maintains the virgin, or original, material thickness throughout the walls of the vessel. Any reduction or thickening of material occurs by accident, or within the basic tolerance of established drawing techniques, which effect a maximum reduction of less than ten percent of the material thickness, more typically in the range of five to six percent. Variation in material thickness may also occur due to clearances within the dies employed in the drawing process, hi some cases, die clearances are designed to create localized stretching in the material. Stretching, during a drawing operation, does not, however, impart any improved or advantageous properties to the stretched portion of the drawn metal product.
  • drawing is an established and extensively used technique for the formation of pressure vessels, since it does permit formation of a pressure vessel of, typically, cylindrical configuration and having a closed end, without the use of seams.
  • earlier techniques would employ a flat sheet rolled into a container, requiring the formation of a side seam, with the further addition of an end piece suitably seamed to the open end of the cylindrical structure. Drawing thus eliminates the side seam and the end seam of such earlier prior art pressure vessels.
  • drawing imposes limitations as discussed above, and moreover fails to provide the capability of precisely sizing the vessel, not only as to its principal dimensions and particular diameter, but also, and to some extent more critically, as to the cross-sectional thickness of the walls of the metal vessel; in drawing operations, the latter is solely dependent upon the original or virgin material thickness.
  • the elongated shell is then subjected to successive ironing stages to reduce the side-wall thickness and thus elongate the axial dimension of the shell.
  • the ironing technique is known to improve the physical characteristics of the ironed material in the side-walls.
  • the conventional drawing and ironing process has been used heretofore primarily for realizing material reduction, i.e., reducing the amount of material required to form a vessel of a given size, along with the elimination of the side and end seams as heretofore achieved by drawing operations alone.
  • the present invention comprises an improved cylindrical container having selectively controlled wall thicknesses, so as to provide the appropriate material thickness in those portions of the vessel, as required for necessary "pressure" performance, yet having ironed side-walls which are of reduced thickness throughout a substantial portion of the axial extent of the cylinder.
  • a disc of the virgin metal is cut.
  • the disc is then drawn into a cup-shape, which preferably may be accomplished by the reverse drawing operation disclosed in the above cited U.S. Pat. No. 3,733,881.
  • the resultant, drawn, elongated shell is then subjected to one or more stages of ironing, performed by a specially configured mandrel which advances the drawn, elongated shell through one or more stages of ironing rings.
  • the mandrel may be employed as well in the final drawing 5 stage of a reverse draw operation as disclosed in the Grigorenko patent, or instead, may be used solely for the ironing operation.
  • the cylinder material is precisely sized throughout the side- wall portion, affording a cylinder that is
  • the drawn and ironed shell can be produced in a single stroke operation of appropriate equipment, the drawn and ironed shell being ready for trimming.
  • the sizing achieved by the ironing process also permits the virgin material employed to be of much less critical tolerance, thus increasing the availability
  • a process for manufacturing a cylindrical container includes the steps of drawing and ironing, using a press, at least two metal shells, forming a container using the at least two metal shells, and attaching a valve portion to the container via a brazing process.
  • the container has a sidewall, the sidewall having a thickness, the process further including the step of specifying the thickness of the sidewall to withstand hydrostatic pressure.
  • the process further includes the step of maintaining a substantially consistent thickness via a substantially
  • drawing and ironing, using a press, at least two metal shells further includes the step of drawing and ironing, using a hydraulic press, at least two metal shells.
  • drawing and ironing, using a press, at least two metal shells further includes the step of drawing and ironing, using a mechanical press, at least two metal shells
  • the method further includes the step of attaching abase to the container.
  • the process further includes the step of increasing the thickness with each run through of the process.
  • FIGURE 1 is a top view of the inventive container
  • FIGURE 2 is a perspective view of the container
  • FIGURE 3 is a top view of the prior art container
  • FIGURE 4 is a perspective view of the prior art container
  • FIGURE 5 is an exploded view of Section A of FIGURE 6
  • FIGURE 6 is a view of the inventive container in an ironing die
  • FIGURE 7 is a top view of another prior art container
  • FIGURE 8 is a perspective view of the prior art container shown in FIGURE 7.
  • FIGURES 1 and 2 illustrate the inventive container 10, which includes a valve portion 12, a valve 18, a body 14, and a base 16.
  • FIGURES 3, 4, 7, and 8 show the prior art container 20, which has a top piece 26, a bottom piece 24, a base 36, a scuff protector 22, and flanges 28. The flanges 28 are attached to the top piece 26 and aid in the attachment of the top and bottom pieces 26, 24.
  • the structure and operation of a cylindrical container are well known in the art, and for the sake of brevity, will not be further discussed herein.
  • a spin trimmer is a rotary trimmer used to trim the ends of tubular or cylindrical parts.
  • the base 16 is connected to the bottom of the container 10. This inventive process allows the sidewalls of the body 14 to be thinner. This process also eliminates at least one part and at least one assembly point, and can be used on any tubular part. In this particular embodiment, the base 16 is between approximately 0.045 inch and approximately 0.055 inch. This thicker base 16 V enables the present invention to eliminate the need for an additional part to protect against scuffing the base 16. Since the additional part is eliminated, the manufacture and assembly process is made quicker, more efficient, and less expensive.
  • the inventive process which utilizes a clearance between the punch and the ' ironing ring, enables the correct size for the container 10 every time.
  • the brazing process helps relieve stress on the part.
  • the brazing process is typically performed in either a batch, or conveyor type, furnace. Brazing, unlike welding, does not melt the parts together. Brazing is similar to soldering, except at a much higher temperature. Brazing uses brass or copper with a flux material for cleaning and flow. The result is that brazing is a much stronger joint than soldering. In general, the higher the melt temperature of the medium, the stronger the joint.
  • the elimination of the scuff protector 22 means one less part to manufacture and assemble, which would help realize a cost advantage without reducing any performance characteristics.
  • FIGURE 5 is an exploded view of Section A of FIGURE 6.
  • FIGURES 5 and 6 show the container 10, the base 16, an ironing ring 30, original material thickness 32, gap 38, and sidewall thickness 34.
  • the gap 38 between the ironing ring 30 and the container 10 controls the thickness of the sidewall 34. This control aids in the container performance. If the ring 30 begins to wear, the container 10 will be too short and will cause a failure to produce the desired length. Conversely, if the gap 38 is too small, the container will be too long, which will also cause a failure. Therefore, the use of the drawing and ironing process enables a more accurately produced part.
  • the ironing process changes the grain structure (cold flow or forming), increasing the hardness (mechanically) that allows the process to perform effectively in this particular embodiment.
  • this invention can be used on any cylindrical container, as long as chosen sound engineering judgment.
  • the present invention is applicable to fire extinguishers, medical grade Freon containers, and other pressurized and non-pressurized cylinders.
  • the previous list is not intended to be limiting or all- encompassing of the examples of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

L'invention concerne un procédé amélioré de fabrication d'un contenant cylindrique (10). Un procédé d'étirage et de réduction de paroi est mis en oeuvre pour produire un contenant plus efficace formé au moyen d'au moins deux enveloppes métalliques. Ce procédé permet de contourner le besoin d'une partie, rendant ainsi le procédé plus efficace et rentable. L'invention concerne également un contenant fabriqué au moyen de ce procédé.
PCT/US2005/007729 2004-03-27 2005-03-09 Procede de fabrication d'un contenant cylindrique et contenant cylindrique fabrique au moyen de ce procede WO2006006958A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/810,286 2004-03-27
US10/810,286 US20050210653A1 (en) 2004-03-27 2004-03-27 Method and apparatus for manufacturing a cylindrical container

Publications (2)

Publication Number Publication Date
WO2006006958A1 WO2006006958A1 (fr) 2006-01-19
WO2006006958A9 true WO2006006958A9 (fr) 2006-04-20

Family

ID=34987994

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/007729 WO2006006958A1 (fr) 2004-03-27 2005-03-09 Procede de fabrication d'un contenant cylindrique et contenant cylindrique fabrique au moyen de ce procede

Country Status (2)

Country Link
US (1) US20050210653A1 (fr)
WO (1) WO2006006958A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070000915A1 (en) * 2005-06-21 2007-01-04 Meyer Intellectual Properties Limited Laminated Cookware with a Protected Edge

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920784A (en) * 1955-12-01 1960-01-12 Chicago Bridge & Iron Co Liquid storage vessel
US3018914A (en) * 1958-07-11 1962-01-30 Otto Bernz Company Inc Pressure container construction
US3522647A (en) * 1968-02-19 1970-08-04 Lennox Ind Inc Method of making a spherical container
US3508677A (en) * 1968-08-20 1970-04-28 Whittaker Corp Vessel for storing high-pressure gases
FR95547E (fr) * 1968-12-11 1971-01-22 Entpr S Leon Ballot Sa Des Réservoirs immergés de grandes capacités.
US3733881A (en) * 1970-09-28 1973-05-22 Shape Farm Inc Method and apparatus for making deep drawn metal shells
US4006838A (en) * 1974-11-25 1977-02-08 Western Industries, Inc. Brazing alloy and brazing paste for gas container joints
DE2841900C2 (de) * 1977-09-26 1984-12-20 The Nippon Aluminium Mfg. Co. Ltd., Osaka Kleindimensioniertes Druckgefäß
GB2040430B (en) * 1979-01-11 1983-02-02 Ocean Phoenix Holdings Nv Tanks for storing liquefied gases
US4320848A (en) * 1979-06-07 1982-03-23 Dye Richard G Deep drawn and ironed pressure vessel having selectively controlled side-wall thicknesses
US4541265A (en) * 1979-06-07 1985-09-17 Purolator Products Inc. Process for forming a deep drawn and ironed pressure vessel having selectively controlled side-wall thicknesses
JPS5871974A (ja) * 1981-10-26 1983-04-28 Toyo Seikan Kaisha Ltd 金属容器の製造方法
US4446714A (en) * 1982-02-08 1984-05-08 Cvacho Daniel S Methods of necking-in and flanging tubular can bodies
NL8301069A (nl) * 1983-03-28 1984-10-16 Hoogovens Groep Bv Driedelige metalen verpakkingsbus, halfprodukt voor de vervaardiging van deze bus, en een werkwijze voor de vervaardiging van metalen verpakkingsbussen.
DE9116117U1 (fr) * 1991-12-30 1993-04-29 Westerwaelder Eisenwerk Gerhard Gmbh, 5241 Weitefeld, De
US5386925A (en) * 1993-06-21 1995-02-07 Amtrol Inc. Expansion tank
US5787920A (en) * 1995-10-16 1998-08-04 Krasnov; Igor Tank for compressed gas
NL1008468C2 (nl) * 1998-03-04 1999-09-07 Hoogovens Staal Bv Werkwijze voor de vervaardiging van een bus door wandstrekken.
DE19837886C2 (de) * 1998-08-20 2003-05-15 Linde Ag Speicherbehälter für kryogene Flüssigkeiten
AU2003229216A1 (en) * 2002-06-03 2003-12-19 Alcan International Limited Two piece container

Also Published As

Publication number Publication date
WO2006006958A1 (fr) 2006-01-19
US20050210653A1 (en) 2005-09-29

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