EP0483207A1 - Amelioration relative a un procede de deformation du metal. - Google Patents

Amelioration relative a un procede de deformation du metal.

Info

Publication number
EP0483207A1
EP0483207A1 EP90910821A EP90910821A EP0483207A1 EP 0483207 A1 EP0483207 A1 EP 0483207A1 EP 90910821 A EP90910821 A EP 90910821A EP 90910821 A EP90910821 A EP 90910821A EP 0483207 A1 EP0483207 A1 EP 0483207A1
Authority
EP
European Patent Office
Prior art keywords
flange
cylindrical
rolling
screw
cylindrical section
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
EP90910821A
Other languages
German (de)
English (en)
Other versions
EP0483207B1 (fr
Inventor
Sydney Ivan Eagle Pr Scrimshaw
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.)
Eagle Precision Technologies Ltd
Original Assignee
Eagle Precision Technologies Ltd
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
Priority claimed from GB898916630A external-priority patent/GB8916630D0/en
Priority claimed from GB898921901A external-priority patent/GB8921901D0/en
Application filed by Eagle Precision Technologies Ltd filed Critical Eagle Precision Technologies Ltd
Publication of EP0483207A1 publication Critical patent/EP0483207A1/fr
Application granted granted Critical
Publication of EP0483207B1 publication Critical patent/EP0483207B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/40—Making outlet openings, e.g. bung holes

Definitions

  • This invention relates to metal deformation and particularly but not exclusively to a method of forming a cylindrical, internally threaded opening in an end wall of a metal, preferably mild steel, container drum.
  • a method of forming a cylindrical opening in a metal sheet comprising piercing, pressing and drawing the metal sheet to provide a raised cylindrical section partly closed at one end by an annular flange, and bending the flange into the cylindrical section while rolling the flange so as to permit the requisite enlargement thereof.
  • a method of forming a screw thread on an internal cylindrical surface for example a cylindrical opening as produced by the method of the first aspect of the invention, comprising rolling a peripherally screw-threaded roller continuously over said surface in orbital relationship with the cylinder axis until the surface is deformed into a complementary screw configuration.
  • Fig. 1 is a partly cut-away view of one end of a container drum with the end wall in section through the closure opening;
  • Fig. 2 is a detail of Fig. 1 to an enlarged scale
  • Figs 3 to 6 illustrate successive stages in the manufacture of the closure opening shown in Fig. 2.
  • Fig. 1 shows part of a cylindrical container drum made of mild steel having an end wall provided with a closure opening further illustrated in Fig. 2 as comprising a raised cylindrical section 1 of double thickness with a screw thread 2 on the cylindrical inner surface of the inner metal skin.
  • the outer end of the cylindrical section 1 is thickened to provide a sealing surface 3 which is engaged by a sealing ring 4 of a conventional externally threaded bung 5 having an internal handle 6.
  • the closure opening illustrated in Fig. 2 is made by first _ piercing, pressing and drawing the metal sheet constituted by the drum end wall (prior to fixing to the drum end in conventional manner) to form a cylindrical section 7 raised out of the plane of the end wall by a step 8 and terminating at its outer end in an annular flange 9 which partly closes the cylindrical section leaving a circular opening 10 around a central axis 11 (Fig. 3).
  • the raised cylindrical section 7 is then surrounded by clamping supports 12 and a tool 13 is progressively introduced into the opening 10 so as to bend the flange 9 inwardly.
  • a tool 13 is progressively introduced into the opening 10 so as to bend the flange 9 inwardly.
  • Such deformation of the flange 9 requires a corresponding enlargement of the opening 10 which cannot be achieved without extension of the flange 9 along its circumferential dimension.
  • Such extension is achieved by orbiting the tool 13 about the axis 11 while simultaneously rolling the frusto-conical tool surface on the flange 9 to achieve the necessary thinning of the metal in this region.
  • the tool 13 When the flange 9 has been bent inwardly to an extent conforming to the shape of the tool 13, the tool 13 is replaced by a tool 14 which has a cylindrical working surface which, using the same rolling action as the tool 13, completes the inward deformation of the flange 9 and the attendant enlargement of the hole 10.
  • the tool 14 also creates the shoulder 3 by pressing metal into a circular recess 15 in the clamping segments 12.
  • the cylindrical section 1 is then completed by using a thread forming tool 16 which has an orbiting and rolling action like tool 14 but in this case is provided with a thread formation on its outer cylindrical periphery, the action of the tool 16 serving to impress said thread formation onto the internal surface of the cylindrical section.
  • a thread forming tool 16 which has an orbiting and rolling action like tool 14 but in this case is provided with a thread formation on its outer cylindrical periphery, the action of the tool 16 serving to impress said thread formation onto the internal surface of the cylindrical section.
  • This difference when the tool rolls on the component without slipping, causes a relative angular positional displacement of the two thread forms (forming and generated). Compensation for this difference may be accomplished by axial displacement of the tool amounting to the pitch of the thread times the ratio of the two diameters.
  • the axial displacement of the forming tool may be achieved by allowing the tool to float freely or by providing an incremental movement of the tool spindle relative to tool rotation.
  • the accumulative effects may be avoided by alternating the direction of rotation of the forming tool after each full revolution of the tool spindle.
  • a similar threaded closure may be formed with a single thickness of metal in which case the preliminary piercing, pressing and drawing operation omits the flange 9 rendering the bending stages using tools 13 and 14 unnecessary, the thread forming tool 16 being used for forming the thread in the cylindrical section 7.
  • the invention is not confined to the formation of cylindrical closure openings for end walls of container drums and the threading operation, for example, has wide application in relation to other cylindrical articles, e.g. conduit sections, which require an internally threaded end section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Laminated Bodies (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Secondary Cells (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

Procédé de formation d'une ouverture cylindrique dans une tôle métallique, par exemple dans la paroi de fermeture d'un récipient cylindrique, qui consiste à percer et étirer la tôle métallique pour former une collerette de section cylindrique obturée partiellement à l'une de ses extrémités par un rebord annulaire. Ce rebord annulaire est ensuite rabattu dans la partie cylindrique à l'aide d'une roulette cônique afin d'ajuster le diamètre selon les besoins. La face interne dudit rebord est filetée à l'aide d'un rouleau cylindrique fileté d'un diamètre inférieur à celui du rebord, animé d'un mouvement planétaire par rapport à l'axe du rebord et déformant ledit rebord pour constituer sur sa surface un filetage correspondant. Le procédé de filetage peut être utilisé pour toute surface cylindrique interne.
EP90910821A 1989-07-20 1990-07-20 Amelioration relative a un procede de deformation du metal Expired - Lifetime EP0483207B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB898916630A GB8916630D0 (en) 1989-07-20 1989-07-20 Improvements in or relating to metal deformation
GB8916630 1989-07-20
GB898921901A GB8921901D0 (en) 1989-09-28 1989-09-28 Improvements in or relating to metal deformation
GB8921901 1989-09-28
PCT/GB1990/001123 WO1991001188A1 (fr) 1989-07-20 1990-07-20 Amelioration relative a un procede de deformation du metal

Publications (2)

Publication Number Publication Date
EP0483207A1 true EP0483207A1 (fr) 1992-05-06
EP0483207B1 EP0483207B1 (fr) 1994-09-14

Family

ID=26295638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90910821A Expired - Lifetime EP0483207B1 (fr) 1989-07-20 1990-07-20 Amelioration relative a un procede de deformation du metal

Country Status (5)

Country Link
EP (1) EP0483207B1 (fr)
AT (1) ATE111386T1 (fr)
AU (1) AU6056090A (fr)
DE (1) DE69012569T2 (fr)
WO (1) WO1991001188A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9506203A (pt) * 1994-05-20 1996-04-23 Tecnocar Srl Processo para manufaturação de um componente único de tampa para filtros de veiculos especialmente filtros de óleo e produção da tampa através deste processo

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2460721A (en) * 1945-07-07 1949-02-01 Inland Steel Co Method of forming bungs in metallic plates
US2493933A (en) * 1945-07-07 1950-01-10 Inland Steel Co Machine for forming threaded openings
DE3050452A1 (en) * 1980-06-26 1982-08-12 V Chemeris Method of obtaining butt-end wall with concentric recess in a tubular workpiece

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9101188A1 *

Also Published As

Publication number Publication date
ATE111386T1 (de) 1994-09-15
AU6056090A (en) 1991-02-22
DE69012569D1 (de) 1994-10-20
EP0483207B1 (fr) 1994-09-14
DE69012569T2 (de) 1995-04-20
WO1991001188A1 (fr) 1991-02-07

Similar Documents

Publication Publication Date Title
Quigley et al. Metal forming: an analysis of spinning processes
US4845972A (en) Method for working the ends of steel pipe by upsetting and pressing
US5619879A (en) Method for the non-cutting production of a hub of a transmission component possessing the hub
US5297411A (en) Method of forming threaded opening
US4691550A (en) Method and apparatus for making a pressure hose socket
US4665780A (en) Method of machining threaded pipe-ends
SE426145B (sv) Forfarande for formning av en endvegg med ett koncentriskt urtag i ett rorformigt arbetsstycke
EP0483207B1 (fr) Amelioration relative a un procede de deformation du metal
US3894331A (en) Method of mounting a bushing to a container closure
US3962899A (en) Method and apparatus for making an eccentric locking collar
JP2754070B2 (ja) ロープ受けドラムおよびその製造方法
US8042370B2 (en) Flow formed gear
US4498322A (en) Thread-rolling tool
US4641410A (en) Method and apparatus for making a joint for steel tubes
US3728750A (en) Method of fabricating screw fasteners
US3164890A (en) Method of and tools for assembly of a packing retainer on a threaded coupling member
JP2018176181A (ja) ボトル缶の製造方法
US3254619A (en) Method of producing an inturned bead metal cap in a rotary type die
RU2085318C1 (ru) Устройство для получения винтовой канавки на трубной заготовке
SU1174140A1 (ru) Устройство дл накатки зубчатых колес
JPH0347935B2 (fr)
JPS6028571B2 (ja) パイプのフランジング加工法
SU680793A1 (ru) Инструмент дл поперечно-винтовой прокатки штучных кольцевых заготовок
JPH07284857A (ja) 偏心ダイスを使用した部分コルゲート管の製造方法
JPH09242828A (ja) パイプ式ターンバックル胴およびその製造法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19920219

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE

17Q First examination report despatched

Effective date: 19930119

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19940914

Ref country code: LI

Effective date: 19940914

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19940914

Ref country code: DK

Effective date: 19940914

Ref country code: CH

Effective date: 19940914

Ref country code: BE

Effective date: 19940914

Ref country code: AT

Effective date: 19940914

REF Corresponds to:

Ref document number: 111386

Country of ref document: AT

Date of ref document: 19940915

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69012569

Country of ref document: DE

Date of ref document: 19941020

ITF It: translation for a ep patent filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19941214

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

ET Fr: translation filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19950731

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19960709

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960711

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19960726

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970720

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970720

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050720