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FR2395794A1 - INTERNAL THROAT FORMATION PROCESS - Google Patents

INTERNAL THROAT FORMATION PROCESS

Info

Publication number
FR2395794A1
FR2395794A1 FR7720317A FR7720317A FR2395794A1 FR 2395794 A1 FR2395794 A1 FR 2395794A1 FR 7720317 A FR7720317 A FR 7720317A FR 7720317 A FR7720317 A FR 7720317A FR 2395794 A1 FR2395794 A1 FR 2395794A1
Authority
FR
France
Prior art keywords
punch
cavity
cavities
bead
forming
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
FR7720317A
Other languages
French (fr)
Other versions
FR2395794B1 (en
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.)
Renault SA
Original Assignee
Renault SA
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 Renault SA filed Critical Renault SA
Priority to FR7720317A priority Critical patent/FR2395794A1/en
Publication of FR2395794A1 publication Critical patent/FR2395794A1/en
Application granted granted Critical
Publication of FR2395794B1 publication Critical patent/FR2395794B1/fr
Granted 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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/12—Forming profiles on internal or external surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/12—Shaping end portions of hollow articles
    • B21K21/14—Shaping end portions of hollow articles closed or substantially-closed ends, e.g. cartridge bottoms

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

Procédé de formation de gorges intérieures par déformation plastique dans des cavités de pièces métalliques. La pièce étant maintenue dans une empreinte de matrice limitant sa déformation externe, un poinçon de même profil que la cavité écrase au fond de celle-ci une pièce en matériau incompressible de plasticité supérieure à celle du matériau de la pièce à former, ledit écrasement formant un bourrelet à la périphérie du fond de la cavité et y imprimant une gorge dans le matériau de la pièce, qui reflue le long du poinçon par extrusion inverse, le matériau du bourrelet d'écrasement étant éliminé après retrait du poinçon par un moyen physico-chimique sélectif. Application à la formation de gorges internes dans des cavites, en particuler dans les alésages, lors d'opérations de formage, notamment de forgeage à froid.Process for forming internal grooves by plastic deformation in cavities of metal parts. The part being held in a die cavity limiting its external deformation, a punch of the same profile as the cavity crushes at the bottom of the latter a part made of incompressible material of greater plasticity than that of the material of the part to be formed, said crushing forming a bead at the periphery of the bottom of the cavity and imprinting therein a groove in the material of the part, which flows back along the punch by reverse extrusion, the material of the crushing bead being removed after removal of the punch by physical means. selective chemical. Application to the formation of internal grooves in cavities, in particular in bores, during forming operations, in particular cold forging.

FR7720317A 1977-07-01 1977-07-01 INTERNAL THROAT FORMATION PROCESS Granted FR2395794A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7720317A FR2395794A1 (en) 1977-07-01 1977-07-01 INTERNAL THROAT FORMATION PROCESS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7720317A FR2395794A1 (en) 1977-07-01 1977-07-01 INTERNAL THROAT FORMATION PROCESS

Publications (2)

Publication Number Publication Date
FR2395794A1 true FR2395794A1 (en) 1979-01-26
FR2395794B1 FR2395794B1 (en) 1980-01-04

Family

ID=9192863

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7720317A Granted FR2395794A1 (en) 1977-07-01 1977-07-01 INTERNAL THROAT FORMATION PROCESS

Country Status (1)

Country Link
FR (1) FR2395794A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5964117A (en) * 1994-10-13 1999-10-12 Luxfer Group Limited Backward extrusion method and product

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5964117A (en) * 1994-10-13 1999-10-12 Luxfer Group Limited Backward extrusion method and product

Also Published As

Publication number Publication date
FR2395794B1 (en) 1980-01-04

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Legal Events

Date Code Title Description
DL Decision of the director general to leave to make available licences of right
ST Notification of lapse