GB794578A - Method of producing a metal cup for subsequent conversion into a cartridge case - Google Patents

Method of producing a metal cup for subsequent conversion into a cartridge case

Info

Publication number
GB794578A
GB794578A GB17431/55A GB1743155A GB794578A GB 794578 A GB794578 A GB 794578A GB 17431/55 A GB17431/55 A GB 17431/55A GB 1743155 A GB1743155 A GB 1743155A GB 794578 A GB794578 A GB 794578A
Authority
GB
United Kingdom
Prior art keywords
blank
cup
metal
punch
die
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
Application number
GB17431/55A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB794578A publication Critical patent/GB794578A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B21K21/06—Shaping thick-walled hollow articles, e.g. projectiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/02—Preliminary treatment of metal stock without particular shaping, e.g. salvaging segregated zones, forging or pressing in the rough
    • B21J1/025—Preliminary treatment of metal stock without particular shaping, e.g. salvaging segregated zones, forging or pressing in the rough affecting grain orientation

Landscapes

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

Abstract

794,578. Making cupped bodies; forging; extruding. HATEBUR, F. B. June 16, 1955 [June 18, 1954], No. 17431/55. Classes 83 (2) and 83 (4). A metal cup 2, Fig. 4, is made by cold working a blank sheared from round bar stock, comprising confining an end part 2, Fig. 3, of the blank and upsetting the remainder thereof to the diameter required for the cup, and then backwardly extruding the upset blank to form the cup. A blank 2 cut off from round stock of steel or non-ferrous metal and of uniform diameter b, Fig. 3, is inserted in a die and the upper end portion of the blank is upset by a punch 4 whereby an external shoulder 11 is formed on the blank. Concentric drag rings 5 on the end of the punch prevent radial flow of metal. The blank is then transferred into a further die, Fig. 4, and is backwardly extruded by a punch 7 having a tapered nose. An ejector 6 is provided. In this operation the fibres in the metal in the region 3 are bent out laterally to form loops. The blank is then inserted in a further die, Fig. 5, where the lower end thereof is reduced in diameter and a detonator seat 8 is formed. Further deformation of the cup may then take place, Fig. 6 (not shown), after which it is drawn into a cartridge or projectile case. The invention is stated to improve the fibre . structure of the finished cartridge case and thus prevent bursting thereof.
GB17431/55A 1954-06-18 1955-06-16 Method of producing a metal cup for subsequent conversion into a cartridge case Expired GB794578A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE794578X 1954-06-18

Publications (1)

Publication Number Publication Date
GB794578A true GB794578A (en) 1958-05-07

Family

ID=6710551

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17431/55A Expired GB794578A (en) 1954-06-18 1955-06-16 Method of producing a metal cup for subsequent conversion into a cartridge case

Country Status (1)

Country Link
GB (1) GB794578A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3234771A (en) * 1960-05-18 1966-02-15 Irc Ltd Method for forming small articles
GB2153278A (en) * 1984-02-02 1985-08-21 Vallourec Process for making an annular flange on the bottom of a rotationally symmetrical vessel
CH705602A1 (en) * 2011-10-12 2013-04-15 Hatebur Umformmaschinen Ag Method for manufacturing mold, involves cutting a portion of metallic bar material and chamfering both ends of cut portion of metallic bar material before supplying cut portion to single-step transformation device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3234771A (en) * 1960-05-18 1966-02-15 Irc Ltd Method for forming small articles
GB2153278A (en) * 1984-02-02 1985-08-21 Vallourec Process for making an annular flange on the bottom of a rotationally symmetrical vessel
CH705602A1 (en) * 2011-10-12 2013-04-15 Hatebur Umformmaschinen Ag Method for manufacturing mold, involves cutting a portion of metallic bar material and chamfering both ends of cut portion of metallic bar material before supplying cut portion to single-step transformation device

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