GB657727A - Method of cold working hollow metal objects - Google Patents

Method of cold working hollow metal objects

Info

Publication number
GB657727A
GB657727A GB6913/49A GB691349A GB657727A GB 657727 A GB657727 A GB 657727A GB 6913/49 A GB6913/49 A GB 6913/49A GB 691349 A GB691349 A GB 691349A GB 657727 A GB657727 A GB 657727A
Authority
GB
United Kingdom
Prior art keywords
ring
charge
detonated
march
immersed
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
GB6913/49A
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.)
Saab Bofors AB
Original Assignee
Bofors AB
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 Bofors AB filed Critical Bofors AB
Publication of GB657727A publication Critical patent/GB657727A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/10—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars
    • C21D7/12—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars by expanding tubular bodies
    • 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/06—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure by shock waves
    • B21D26/08—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure by shock waves generated by explosives, e.g. chemical explosives

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

657,727. Altering physical structure. AKTIEBOLAGET BOFORS. March 14, 1949, No. 6913. Convention date, March 30, 1948. [Class 83 (iv)] Hollow objects capable of being cold workhardened, have their elastic limit raised and may also be altered in shape by expanding with high explosives whilst the ends of the object are open. A steel ring 4 is immersed in a water filled container 1 and supported on wooden blocks 3 in such a manner that an immersed explosive charge 5 projects beyond both its ends. The charge may have varying diameter along its length proportioned to the varying diameters of the ring and may be detonated centrally for producing barrelshaped deformation or may be detonated at one end 6 for producing conical deformations. Where a cylindrical ring is. required to retain its cylindrical shape the charge may have circumferential grooves in line with the ends of the ring. T.N.T., hexyl, penthrite and nitrolite are referred to as suitable explosives.
GB6913/49A 1948-03-30 1949-03-14 Method of cold working hollow metal objects Expired GB657727A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE657727X 1948-03-30

Publications (1)

Publication Number Publication Date
GB657727A true GB657727A (en) 1951-09-26

Family

ID=20314221

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6913/49A Expired GB657727A (en) 1948-03-30 1949-03-14 Method of cold working hollow metal objects

Country Status (1)

Country Link
GB (1) GB657727A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969758A (en) * 1961-01-31 Apparatus for contour forming
US3136049A (en) * 1959-07-27 1964-06-09 Aerojet General Co Explosive method and apparatus for deforming metal
US3235955A (en) * 1964-01-22 1966-02-22 Foster Wheeler Corp Explosive forming with balanced charges
US3344509A (en) * 1965-06-25 1967-10-03 Foster Wheeler Corp Method for the explosive section forming of vessels
CN103862696A (en) * 2014-03-19 2014-06-18 中国船舶重工集团公司第七○二研究所 Conical underground explosion shock wave compaction device
CN113637932A (en) * 2021-08-27 2021-11-12 北京理工大学 Preparation method of gradient hardened titanium alloy

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969758A (en) * 1961-01-31 Apparatus for contour forming
US3136049A (en) * 1959-07-27 1964-06-09 Aerojet General Co Explosive method and apparatus for deforming metal
US3235955A (en) * 1964-01-22 1966-02-22 Foster Wheeler Corp Explosive forming with balanced charges
US3344509A (en) * 1965-06-25 1967-10-03 Foster Wheeler Corp Method for the explosive section forming of vessels
CN103862696A (en) * 2014-03-19 2014-06-18 中国船舶重工集团公司第七○二研究所 Conical underground explosion shock wave compaction device
CN113637932A (en) * 2021-08-27 2021-11-12 北京理工大学 Preparation method of gradient hardened titanium alloy
CN113637932B (en) * 2021-08-27 2022-02-15 北京理工大学 Preparation method of gradient hardened titanium alloy

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