GB835261A - A method of hot boring of metal billets - Google Patents

A method of hot boring of metal billets

Info

Publication number
GB835261A
GB835261A GB17855/56A GB1785556A GB835261A GB 835261 A GB835261 A GB 835261A GB 17855/56 A GB17855/56 A GB 17855/56A GB 1785556 A GB1785556 A GB 1785556A GB 835261 A GB835261 A GB 835261A
Authority
GB
United Kingdom
Prior art keywords
billet
whilst
glass
piercing
hole
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
GB17855/56A
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.)
COMPTOIR IND ETIRAGE
Original Assignee
COMPTOIR IND ETIRAGE
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 COMPTOIR IND ETIRAGE filed Critical COMPTOIR IND ETIRAGE
Publication of GB835261A publication Critical patent/GB835261A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B21J5/10—Piercing billets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/32—Lubrication of metal being extruded or of dies, or the like, e.g. physical state of lubricant, location where lubricant is applied

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)

Abstract

835,261. Billet piercing; extruding. COMPTOIR INDUSTRIEL D'ETIRAGE ET PROFILAGE DE METAUX. June 8, 1956 [Aug. 24, 1955], No. 17855/56. Class 83 (4). A method of piercing a metal billet 2 comprises drilling a hole 3 in the billet, whilst cold, over at least part of its length to a diameter less than the diameter of the desired bore and having a conical entry portion 4, heating the billet and coating it externally and internally with a vitreous product 8, 9, inserting the billet in the container 1 of an extrusion press and pressing the nose 6 of a punch 7 through the drilled hole to enlarge it to the desired bore whilst permitting the billet metal to flow backwardly. The vitreous product may comprise a glass, oxide, salt or a slag which melts at the working temperature whilst remaining viscous. The exterior of a steel billet may be coated by rolling it along a table covered with glass powder and the interior thereof may be coated with powdered glass inserted with a long spoon. Alternatively or additionally a packet of commercial glass fibres may be introduced into the conical portion of the hole or the latter may be filled with powdered glass whilst the billet is in the container. Specific examples are given for the piercing of billets of 18/8 stainless steel and nickel chrome alloys of given dimensions. The pierced billet may be subsequently extruded in the same press into a tube. Reference has been directed by the Comptroller to Specifications 603,582 and 784,492.
GB17855/56A 1955-08-24 1956-06-08 A method of hot boring of metal billets Expired GB835261A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR835261X 1955-08-24

Publications (1)

Publication Number Publication Date
GB835261A true GB835261A (en) 1960-05-18

Family

ID=9297573

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17855/56A Expired GB835261A (en) 1955-08-24 1956-06-08 A method of hot boring of metal billets

Country Status (1)

Country Link
GB (1) GB835261A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5054184A (en) * 1987-05-29 1991-10-08 Valinox Process and apparatus for hot shaping of metals or metal alloys

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5054184A (en) * 1987-05-29 1991-10-08 Valinox Process and apparatus for hot shaping of metals or metal alloys
WO1993013884A1 (en) * 1987-05-29 1993-07-22 Jacques Gerard Method and device for hot forming of metals or metal alloys

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