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GB1484569A - Manufacturing hollow elongated articles by hydrostatic extrusion - Google Patents

Manufacturing hollow elongated articles by hydrostatic extrusion

Info

Publication number
GB1484569A
GB1484569A GB4742073A GB4742073A GB1484569A GB 1484569 A GB1484569 A GB 1484569A GB 4742073 A GB4742073 A GB 4742073A GB 4742073 A GB4742073 A GB 4742073A GB 1484569 A GB1484569 A GB 1484569A
Authority
GB
United Kingdom
Prior art keywords
billet
cavity
extrusion
extruded
substance
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
GB4742073A
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.)
UK Secretary of State for Industry
Original Assignee
UK Secretary of State for Industry
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 UK Secretary of State for Industry filed Critical UK Secretary of State for Industry
Priority to GB4742073A priority Critical patent/GB1484569A/en
Priority to DE19742447771 priority patent/DE2447771A1/en
Priority to NL7413251A priority patent/NL7413251A/en
Priority to JP11573474A priority patent/JPS51115264A/en
Priority to SE7412687A priority patent/SE7412687L/
Publication of GB1484569A publication Critical patent/GB1484569A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, bars, tubes
    • B21C23/085—Making tubes
    • 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
    • B21C23/007—Hydrostatic extrusion
    • 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
    • B21C23/01—Extruding metal; Impact extrusion starting from material of particular form or shape, e.g. mechanically pre-treated

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Forging (AREA)
  • Metal Extraction Processes (AREA)
  • Lubricants (AREA)

Abstract

1484569 Extruding hollow, elongate articles INDUSTRY SECRETARY OF STATE FOR 9 Oct 1974 [10 Oct 1973] 47420/73 Headings B3A and B3P A method of making a hollow, elongate article includes hydrostatically extruding through a die 28 a billet which surrounds at least one elongate cavity 12 filled with a substance 14 having a hardness not greater than that of the billet and removing the substance from the billet during or after extrusion, the billet comprising at least two discrete parts and extrusion taking place in the direction of the longitudinal axis of the cavity. One form of billet comprises a discardable nose portion 48, Fig. 6, and an end closure 54 screwed on to a cylindrical body portion 50 which may be of copper while the portion 48 may be of aluminium. The billet may be filled with household salt which is easily removed from the extruded product, e.g. by hot water or steam. The billet may be formed into a fivelobed cam and the cavity may comprise between 2À8-25% of the cross-sectional area, Fig. 2 (not shown). Alternatively thin walled tubing of non- circular section or comprising a number of tubes nested within a larger diameter tube may be made as may a thick walled tube having a number of longitudinal ducts. The cavity or cavities are drilled in the original billet if they are of circular cross-section or the billet may be cast with non-circular cavity or cavities. A steel billet is filled with aluminium alloy and coated with zinc phosphate and stearate soap. Immediately before extrusion it is further coated with molybdenum disulphide and graphite grease. After extrusion the aluminium alloy is punched out or melted out preferably by passing an electric current through it. Alternatively the extruded billet may be immersed in a 20% solution of sodium hydroxide in water, which attacks the aluminium alloy at its interface with the steel so that only a small amount of the alloy need be dissolved. For long extruded products, the substance, e.g. lead or Woods metal, is melted by heating for removal. Materials which may be extruded include stainless and other steels, aluminium and its alloys, titanium, niobium and zirconium. The extrusion process may be assisted by drawing the billet through the die.
GB4742073A 1973-10-10 1973-10-10 Manufacturing hollow elongated articles by hydrostatic extrusion Expired GB1484569A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB4742073A GB1484569A (en) 1973-10-10 1973-10-10 Manufacturing hollow elongated articles by hydrostatic extrusion
DE19742447771 DE2447771A1 (en) 1973-10-10 1974-10-07 PROCESS FOR THE PRODUCTION OF LONGITUDINAL HOLLOW BODIES
NL7413251A NL7413251A (en) 1973-10-10 1974-10-08 METHOD OF MANUFACTURING HOLLE ERPES.
JP11573474A JPS51115264A (en) 1973-10-10 1974-10-09 Method of producing slender hollow article
SE7412687A SE7412687L (en) 1973-10-10 1974-10-09

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4742073A GB1484569A (en) 1973-10-10 1973-10-10 Manufacturing hollow elongated articles by hydrostatic extrusion

Publications (1)

Publication Number Publication Date
GB1484569A true GB1484569A (en) 1977-09-01

Family

ID=10444904

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4742073A Expired GB1484569A (en) 1973-10-10 1973-10-10 Manufacturing hollow elongated articles by hydrostatic extrusion

Country Status (5)

Country Link
JP (1) JPS51115264A (en)
DE (1) DE2447771A1 (en)
GB (1) GB1484569A (en)
NL (1) NL7413251A (en)
SE (1) SE7412687L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE413995B (en) * 1977-02-07 1980-07-07 Asea Ab PRESSURE FOR HYDROSTATIC STRESS PRESSURE OF RODS

Also Published As

Publication number Publication date
JPS51115264A (en) 1976-10-09
NL7413251A (en) 1975-04-14
DE2447771A1 (en) 1975-04-17
SE7412687L (en) 1975-04-11

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee