US3919871A - Process and apparatus for producing a neck on a metal container having a closed bottom - Google Patents

Process and apparatus for producing a neck on a metal container having a closed bottom Download PDF

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Publication number
US3919871A
US3919871A US488763A US48876374A US3919871A US 3919871 A US3919871 A US 3919871A US 488763 A US488763 A US 488763A US 48876374 A US48876374 A US 48876374A US 3919871 A US3919871 A US 3919871A
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US
United States
Prior art keywords
container
neck
press
piston
closed bottom
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
US488763A
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English (en)
Inventor
Ivan Andrasev
Jozsef Nemeth
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Novex Rt
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Novex Rt
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Publication date
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Publication of US3919871A publication Critical patent/US3919871A/en
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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
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/54—Making hollow objects characterised by the use of the objects cartridge cases, e.g. for ammunition, for letter carriers in pneumatic-tube plants

Definitions

  • the workpiece to be shaped is placed in a press and is subjected simultaneously to internal and external pressure by a pressurized fluid such as an hydraulic medium, and the neckdrawing step is carried out in this compressively stressed condition.
  • a pressurized fluid such as an hydraulic medium
  • suitable cavities are formed outside and inside of the workpiece for the introduction of the pressure medium, which cavities communicate with the source of the medium, and this medium can be placed under the technologically required pressure.
  • PROCESS AND APPARATUS FOR PRODUCING A NECK ON A METAL CONTAINER HAVING A CLOSED BOTTOM The invention concerns a process and apparatus for the manufacture of metallic products, principally cartridges, bulbs or other similar articles.
  • neck part of the starting prod uct having a closed bottom which product is expedi ently produced by drawing is customarily effected by a multi-stage neck rolling or neck drawing process.
  • multi-stage neck drawing has shown itself to be more expedient, especially for objects of smaller dimensions, e.g., cartridges for soda syphons, I
  • the drawing process of the neck part of the'closed bottom has to be performed in several stages because the hardening, creasing and possible cracking of the material of the bulb arising in the course of tha change of shape during drawing sets a limit to the reduction, i.e., decrease of cross-section, achievable in one step. This is why theneck drawing operation has to be carried out in several stages and between the individual reductions, i.e., drawing stages, annealing heat treatment steps have had to be interpolated.
  • the neck-drawing process and thus the current manufacture of cartridge-like products is of low productivity and high costs, even if multi-position, single-purpose machines are used in their production.
  • An additional operation, which increases the overall time required for manufacture, is the step of cutting a thread in the opening of the neck parts of cartridge-like products, necessary for hermetic sealing; this step is performed on a specially-built machine separately from the neck drawing step.
  • the invention aims to eliminate or at least reduce the above-described drawbacks in the manufacture of cartridges and like metallic products and to render their production more economical. It is recognized that in order to attain this aim it is necessary to create conditions wherein the starting semi-product is rendered more suitable for carrying out the shaping step with a higher deformation factor.
  • This aim is achieved by the process according to one aspect of the invention by subjecting the starting semiproduct to be shaped simultaneously to internal and external fluid pressure during the neck-drawing step and carrying out the shaping step under these pressurised conditions.
  • the dimensioning of the internal opening of the drawn neck part and the cutting of the internal thread are also effected on the workpiece held in a stamping apparatus with the aid of an exchangeable tool or of another, similar means.
  • a stamping apparatus is employed wherein appropriate cavities are formed for internally and externally sur' rounding, and pressurising, the starting product pre pared for the shaping by means of a pressurised medium, and the apparatus has means for putting the medium under pressure.
  • the pressurisation of the medium surrounding the material to be shaped is effected by the press tool itself during the pressing (stamping) operation.
  • the preferred embodiment of the stamping apparatus according to the invention shown in the drawing consists of three principal parts, a bottom part 1, a central part 2 and an upper part 3.
  • the bottom part 1 is connected by way of its bottom face and lower cylindrical part to the tool-holding table H of a non-illustrated metalworking machine, or to an automatic rotary indexing table located on the table of the metalworking machine making it possible to perform the neck drawing of several workpieces in a single stroke.
  • threaded apertures are disposed for securing the bottom part 1 with the central part 2, while along its centre line a stepped bore is formed for locating and guiding an ejector shaft 4.
  • a central cylindrical bore for the location and guiding of a movable member 5 is formed in the bottom and central parts 1, 2 which are secured together by bolts, the bore serving to support a workpiece 6 with the cooperation of a piston 7 and a tensioning ring 8 connected thereto.
  • the piston 7 has an arcuately recessed seat in its working face.
  • springs 9, spring plates 10 and spring-pretensioning screws 11 are located in respective bores in the bottom and central parts 1, 2.
  • the workpiece 6 is positioned at the upper part of the central bore of the movable member 5 in the cavity of the piston and is surrounded in a space 12 by a pressure medium (which may be pneumatic but is preferably an hydraulic medium) communicating with the outside via a bore 13.
  • a pressure medium which may be pneumatic but is preferably an hydraulic medium
  • a necking ring 14 is disposed in the upper part 3 of the press tool.
  • the hydraulic medium is introduced into and removed from an inner cavity 15 of the workpiece 6 via a bore 16.
  • Hermetic sealing between the end faces of the central and upper parts 2, 3 and between the movable member 5 and the piston 7 is provided by respective seals 17, 18.
  • the workpiece 6 is placed, expediently by a nonillustrated automated device, in the seat formed in the piston 7 via the gap between the bottom and upper parts 1, 3 which have been pulled apart by the metalworking machine. Then the bottom and upper parts 1, 3 of the machine are closed; the space 12 surrounding the workpiece 6 is hermetically sealed by the seal 17.
  • a hydraulic feeding apparatus (not shown) fills the spaces 12 and 15 around and in the workpiece, respectively, by way of bores 13 and 16. Thereafter, the upper part 3 and thus the necking ring 14 and the movable member 15, descend.
  • the space for the hydraulic medium surrounding and filling the workpiece is reduced, i.e., the hydraulic medium is put under pressure inside and outside the workpiece so that a compressive stress is set up in the workpiece.
  • the pressure of the hydraulic medium is kept constant by a non-illustrated control device which is located in the ducting of the hydraulic medium, is adjusted to the prescribed pressure and the connections of which are shown by arrows adjacent the bores 13 and 16.
  • the deformability of the workpiece increases under pressure and the necking ring 14 performs the neck drawing in a single step.
  • the stamping machine then parts the bottom and top parts 1, 3 from each other.
  • the workpiece is lifted out, after appropriate movement to remove from it the hydraulic medium required for the shaping.
  • the springs 9 lift the movable member back to its initial position.
  • the thread cutting in the opening of the necked part of the workpiece 6 is carried out by a thread borer 19 in the same workholding step as the necking, i.e., the workpiece needs to be clamped in position only once.
  • a process for the production of a neck on a metal container having a closed bottom comprising placing a metal container having a closed bottom in a press with the closed bottom of the metal container supported by the press, subjecting both the interior and the exterior 4 of the container to the pressure ofa fluid under positive pressure, and while maintaining said positive pressure reducing the internal diameter of the end of said container which is remote from said closed bottom by pressing simultaneously on both ends of the container in opposite directions lengthwise of the container.
  • Apparatus for forming a neck on a metal container having a closed bottom comprising a press having therein a piston that bears against the closed bottom of the container, a ring spaced from the piston and having an internal diameter less than the greatest internal diameter of the container to form said neck on said container, means for moving said ring and piston toward each other, and means for introducing fluid under pressure into said container and into said press externally of said container thereby to permit formation of said neck by a single movement of said ring and piston toward each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Forging (AREA)
US488763A 1973-07-13 1974-07-15 Process and apparatus for producing a neck on a metal container having a closed bottom Expired - Lifetime US3919871A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU73AA743A HU167979B (en) 1973-07-13 1973-07-13 Method and apparatus for producing metal products particularly cartridges

Publications (1)

Publication Number Publication Date
US3919871A true US3919871A (en) 1975-11-18

Family

ID=10992986

Family Applications (1)

Application Number Title Priority Date Filing Date
US488763A Expired - Lifetime US3919871A (en) 1973-07-13 1974-07-15 Process and apparatus for producing a neck on a metal container having a closed bottom

Country Status (10)

Country Link
US (1) US3919871A (cs)
AT (1) AT331095B (cs)
CA (1) CA1014014A (cs)
CS (1) CS201526B2 (cs)
DD (1) DD112085A5 (cs)
DE (1) DE2433632C2 (cs)
FR (1) FR2241356A1 (cs)
GB (1) GB1428934A (cs)
HU (1) HU167979B (cs)
SU (1) SU652870A3 (cs)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4362037A (en) * 1980-10-24 1982-12-07 Emhart Industries, Inc. Hollow article internal pressure forming apparatus and method
US5916317A (en) * 1996-01-04 1999-06-29 Ball Corporation Metal container body shaping/embossing
US6079244A (en) * 1996-01-04 2000-06-27 Ball Corporation Method and apparatus for reshaping a container body
US20030084694A1 (en) * 2001-05-01 2003-05-08 Kevin Gong Methods of and apparatus for pressure-ram-forming metal containers and the like
US20030090032A1 (en) * 2001-10-22 2003-05-15 Accra Teknik Ab Apparatus and method for quenching thin-walled metal hollow casing
US20040194522A1 (en) * 2001-05-01 2004-10-07 Peter Hamstra Method of pressure-ram-forming metal containers and the like
US20050081589A1 (en) * 2003-10-21 2005-04-21 Ghiran Mircea M. Method and apparatus for forming a threaded hole in a hydroformed part
US6915672B1 (en) * 2004-03-12 2005-07-12 General Motors Corporation Hydrotapping power unit
US20050252263A1 (en) * 2004-05-14 2005-11-17 Macewen Stuart R Methods of and apparatus for forming hollow metal articles
USD739731S1 (en) 2013-10-03 2015-09-29 Anheuser-Busch, Llc Metal beverage bottle
USD739732S1 (en) 2013-10-03 2015-09-29 Anheuser-Busch, Llc Metal beverage bottle
US10022773B2 (en) 2014-04-30 2018-07-17 Alcoa Usa Corp. Aluminum sheet with enhanced formability and an aluminum container made from aluminum sheet

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19516064C2 (de) * 1995-05-04 1998-01-29 Rasselstein Ag Verfahren zur Herstellung eines Blechbehälters mit im wesentlichen bauchiger Form
US7726165B2 (en) * 2006-05-16 2010-06-01 Alcoa Inc. Manufacturing process to produce a necked container

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US795020A (en) * 1904-10-21 1905-07-18 P & F Corbin Apparatus for producing seamless knobs.
US887950A (en) * 1906-09-12 1908-05-19 Reed & Barton Corp Process of making seamless hollow ware.
US2407855A (en) * 1945-04-13 1946-09-17 Hydraulic Control Engineering Hydraulic press system
US3358489A (en) * 1965-08-13 1967-12-19 Western Electric Co Apparatus for forming bulbous articles
US3487668A (en) * 1966-07-12 1970-01-06 Western Electric Co Shaping and forming articles

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB414564A (en) * 1933-12-05 1934-08-09 Kidde & Co Walter Improved method of making cylindrical metal containers for gas under pressure
DE650936C (de) * 1936-07-03 1938-12-10 Hans Amfaldern Verfahren zur Herstellung von Leichtmetallflaschen mit verstaerktem Halsteil
BE628946A (cs) * 1962-02-28

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US795020A (en) * 1904-10-21 1905-07-18 P & F Corbin Apparatus for producing seamless knobs.
US887950A (en) * 1906-09-12 1908-05-19 Reed & Barton Corp Process of making seamless hollow ware.
US2407855A (en) * 1945-04-13 1946-09-17 Hydraulic Control Engineering Hydraulic press system
US3358489A (en) * 1965-08-13 1967-12-19 Western Electric Co Apparatus for forming bulbous articles
US3487668A (en) * 1966-07-12 1970-01-06 Western Electric Co Shaping and forming articles

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4362037A (en) * 1980-10-24 1982-12-07 Emhart Industries, Inc. Hollow article internal pressure forming apparatus and method
US5916317A (en) * 1996-01-04 1999-06-29 Ball Corporation Metal container body shaping/embossing
US6079244A (en) * 1996-01-04 2000-06-27 Ball Corporation Method and apparatus for reshaping a container body
US20030084694A1 (en) * 2001-05-01 2003-05-08 Kevin Gong Methods of and apparatus for pressure-ram-forming metal containers and the like
US7107804B2 (en) 2001-05-01 2006-09-19 Novelis Inc. Methods of and apparatus for pressure-ram-forming metal containers and the like
US20040187536A1 (en) * 2001-05-01 2004-09-30 Kevin Gong Methods of pressure-ram-forming metal containers and the like
US20040194522A1 (en) * 2001-05-01 2004-10-07 Peter Hamstra Method of pressure-ram-forming metal containers and the like
US6802196B2 (en) * 2001-05-01 2004-10-12 Alcan International Limited Methods of and apparatus for pressure-ram-forming metal containers and the like
US6976376B2 (en) * 2001-10-22 2005-12-20 Accra Teknik Ab Apparatus and method for quenching thin-walled metal hollow casing
US20030090032A1 (en) * 2001-10-22 2003-05-15 Accra Teknik Ab Apparatus and method for quenching thin-walled metal hollow casing
US6931901B2 (en) * 2003-10-21 2005-08-23 General Motors Corporation Method and apparatus for forming a threaded hole in a hydroformed part
US20050081589A1 (en) * 2003-10-21 2005-04-21 Ghiran Mircea M. Method and apparatus for forming a threaded hole in a hydroformed part
US6915672B1 (en) * 2004-03-12 2005-07-12 General Motors Corporation Hydrotapping power unit
US20050252263A1 (en) * 2004-05-14 2005-11-17 Macewen Stuart R Methods of and apparatus for forming hollow metal articles
US7191032B2 (en) 2004-05-14 2007-03-13 Novelis Inc. Methods of and apparatus for forming hollow metal articles
USD739731S1 (en) 2013-10-03 2015-09-29 Anheuser-Busch, Llc Metal beverage bottle
USD739732S1 (en) 2013-10-03 2015-09-29 Anheuser-Busch, Llc Metal beverage bottle
US10022773B2 (en) 2014-04-30 2018-07-17 Alcoa Usa Corp. Aluminum sheet with enhanced formability and an aluminum container made from aluminum sheet

Also Published As

Publication number Publication date
DE2433632C2 (de) 1982-11-18
CS201526B2 (en) 1980-11-28
AT331095B (de) 1976-08-10
GB1428934A (en) 1976-03-24
DD112085A5 (cs) 1975-03-20
ATA562874A (de) 1975-10-15
HU167979B (en) 1976-02-28
SU652870A3 (ru) 1979-03-15
FR2241356A1 (cs) 1975-03-21
CA1014014A (en) 1977-07-19
DE2433632A1 (de) 1975-02-13

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